1. The liquefied consolidated soil is characterized by comprising the following formula components in parts by mass:

80-100 parts of soil;

5-20 parts of a cementing material;

0-0.5 part of a dispersant;

0-1 part of additive;

5-100 parts of water.

2. The liquefied consolidated soil of claim 1, wherein: the soil is at least one of non-polluted soil with the grain size of less than or equal to 20mm, building solid waste recycled aggregate or slurry.

3. The liquefied consolidated soil of claim 1, wherein: the cementing material is at least one of a rock-soil solidifying agent or portland cement, and the mass percentage of the rock-soil solidifying agent is less than or equal to 80% when the rock-soil solidifying agent and the portland cement are mixed for use.

4. The liquefied consolidated soil of claim 3, wherein: the rock-soil curing agent is at least one of cement clinker, fly ash, steel slag powder, water slag powder, phosphogypsum, fluorgypsum, desulfurized gypsum, slag powder, dry carbide slag, red mud or lime.

5. The liquefied consolidated soil of claim 3, wherein: the portland cement is at least one of PO42.5, PO32.5, PS42.5 or PS32.5 cement.

6. The liquefied consolidated soil of claim 1, wherein: the dispersant is polyacrylate.

7. The liquefied consolidated soil of claim 6, wherein: the polyacrylate is sodium polyacrylate or potassium polyacrylate with molecular weight of 2000-5000 mol/kg.

8. The liquefied consolidated soil of claim 1, wherein: the additive is at least one of a waterproof agent and a foaming agent.

9. A preparation method of liquefied consolidated soil is characterized by comprising the following steps: preparing a liquefied consolidated soil feedstock as claimed in any of claims 1 to 8 by:

s11: pretreating soil, removing impurities and preparing the soil with a qualified particle size;

s12: preparing a cementing material component according to soil texture and engineering requirements;

s13: diluting an additive and water in proportion to form an additive solution, and diluting a dispersing agent and water in proportion to prepare a dispersing agent solution for later use;

s14: firstly, vibrating and mixing the soil and the gelled material which are measured according to the mixing ratio in a double horizontal shaft vibration mixer for not less than 10s, wherein the vibration frequency of the vibration mixer is not less than 20 HZ;

s15: and adding the water, the additive solution and the dispersant solution which are measured according to the mixing proportion into a double horizontal shaft vibration stirrer, continuously vibrating and stirring for not less than 15s, sampling and testing the slump expansion degree, and obtaining a finished product when the slump expansion degree reaches a designed value.

10. A preparation method of liquefied consolidated soil is characterized by comprising the following steps: preparing a liquefied consolidated soil feedstock as claimed in any of claims 1 to 8 by:

s21: pretreating soil, removing impurities and preparing the soil with a qualified particle size;

s22: preparing a cementing material component according to soil texture and engineering requirements;

s23: diluting an additive and water in proportion to form an additive solution, and diluting a dispersing agent and water in proportion to prepare a dispersing agent solution for later use;

s24: firstly, the gelled material, the dispersant solution, the additive solution and the water which are measured according to the mixing proportion are vibrated and stirred in a double horizontal shaft vibration stirrer for not less than 15s, and the vibration frequency of the vibration stirrer is not less than 20 HZ;

s25: and adding the soil metered according to the mixing proportion into a double-horizontal-shaft vibration stirrer, continuously vibrating and stirring for not less than 10s, sampling and testing the slump expansion degree, and obtaining a finished product when the slump expansion degree reaches a design value.

Background

In recent years, more and more projects for supporting deep foundation pits are provided, and the problems of narrow backfill space of the foundation pit, large backfill depth, unstable tamping quality of backfill soil, high required quality and the like are often encountered in the backfill construction process of various project foundation pits. The accidents of water dispersion, pipeline, house-entering roads and the like of buildings are subsided and damaged due to the fact that the backfilled soil is not compact, and the use function is lost occur. Meanwhile, the backfill of the foundation trench is limited by factors such as backfill conditions, space and the like, and cannot be densely backfilled, so that the damage to the seismic performance of the building is brought. In the traditional process, plain soil or lime soil is mostly adopted for construction by layers by using small-sized tamping equipment, the construction difficulty is high, the construction period is long, and the quality is difficult to control, so that most projects only adopt plain concrete for backfilling to ensure the backfilling quality. The adoption of plain concrete for backfilling has higher manufacturing cost and higher strength, and brings a difficult problem to later-stage maintenance. In addition, a large amount of solid wastes generated in the production process of the existing building industry are usually made into backfill materials needing paving and rolling foundations, and the backfill materials are limited by factors such as backfill conditions, space and the like and cannot be backfilled and compacted without compaction. Therefore, in order to solve the above problems, there is a need for a liquefied consolidated soil and a method for preparing the same, which can comprehensively utilize solid wastes, has a large flow state, and has good performance indexes.

Disclosure of Invention

The invention provides liquefied consolidation soil and a preparation method thereof for solving the problems of the existing industry, which uses widely distributed soil, construction solid waste recycled aggregate or slurry as a main material, adds a certain proportion of cementing material, water, additive and the like, adopts a unique vibration stirring process to prepare a large-flow-state pumpable vibration liquefaction consolidation material, and the liquefaction consolidation material has the characteristics of self-compaction, vibration avoidance, high strength, permeability resistance, shock resistance, easy molding, easy construction, environmental protection and the like, and is a high-value green way for realizing the quality improvement of filling engineering and the recycling of solid waste.

The technical scheme adopted by the invention is as follows:

the liquefied consolidation soil comprises the following formula components in parts by mass:

80-100 parts of soil;

5-20 parts of a cementing material;

0-0.5 part of a dispersant;

0-1 part of additive;

5-100 parts of water.

Further, the soil is at least one of non-polluted soil with the particle size of less than or equal to 20mm, construction solid waste recycled aggregate or slurry.

Further, the cementing material is at least one of a rock-soil solidifying agent or portland cement, the mass ratio of the rock-soil solidifying agent to the portland cement is less than or equal to 80%, and the component proportion can be adjusted according to specific construction requirements when the rock-soil solidifying agent and the portland cement are mixed for use.

Further, the rock-soil curing agent comprises at least one of cement clinker, fly ash, steel slag powder, water slag powder, phosphogypsum, fluorgypsum, desulfurized gypsum, slag powder, dry carbide slag, red mud or lime, and when two or more of the above materials are mixed for use, the component proportion can be adjusted according to specific construction requirements.

Further, the portland cement is at least one of PO42.5, PO32.5, PS42.5 or PS32.5 cement, and the component proportion can be adjusted according to specific construction requirements when the portland cement is mixed for use.

Further, the dispersing agent is polyacrylate.

Further, the polyacrylate is sodium polyacrylate or potassium polyacrylate with the molecular weight of 2000-5000 mol/kg.

Furthermore, the additive is at least one of a waterproof agent and a foaming agent, and the component proportion can be adjusted according to specific construction requirements when the additive is mixed for use.

A preparation method of liquefied consolidated soil comprises the following steps of:

s11: pretreating soil, removing impurities and preparing the soil with a qualified particle size;

s12: preparing a cementing material component according to soil texture and engineering requirements;

s13: in order to enable the stirring to be more uniform, firstly diluting the additive and the water into an additive solution in proportion, and diluting the dispersant and the water in proportion to prepare a dispersant solution for later use;

s14: the soil and the gelled material which are measured according to the mixing proportion are subjected to vibration mixing in a double horizontal shaft vibration mixer for not less than 10s, and the vibration frequency of the vibration mixer is not less than 20 HZ;

s15: and adding the water, the additive solution and the dispersant solution which are measured according to the mixing proportion into a double horizontal shaft vibration stirrer, continuously vibrating and stirring for not less than 15s, sampling and testing the slump expansion degree, and obtaining a finished product when the slump expansion degree reaches a designed value.

A preparation method of liquefied consolidated soil comprises the following steps of:

s21: pretreating soil, removing impurities and preparing the soil with a qualified particle size;

s22: preparing a cementing material component according to soil texture and engineering requirements;

s23: diluting an additive and water in proportion to form an additive solution, and diluting a dispersing agent and water in proportion to prepare a dispersing agent solution for later use;

s24: firstly, the gelled material, the dispersant solution, the additive solution and the water which are measured according to the mixing proportion are vibrated and mixed in a double horizontal shaft vibration mixer for not less than 15s, the vibration frequency of the vibration mixer is not less than 20HZ, and the vibration mixing time and the vibration frequency can be adjusted according to different material properties and different material proportions;

s25: and adding the soil metered according to the mixing proportion into a double-horizontal-shaft vibration stirrer, continuously vibrating and stirring for not less than 10s, sampling and testing the slump expansion degree, and obtaining a finished product when the slump expansion degree reaches a design value.

The invention has the beneficial effects that:

1. the main materials of the invention are widely distributed and are obtained from local sources, and the engineering waste soil, the building solid waste recycled aggregate, the engineering slurry and the like on the construction site can be processed and used on the spot, thereby reducing the land resource occupied by the waste soil, avoiding secondary treatment, being beneficial to saving resources and protecting environment, reducing cost and improving efficiency;

2. the cementing material adopts a rock-soil solidifying agent, portland cement or a mixture of the rock-soil solidifying agent and the portland cement, the rock-soil solidifying agent adopts industrial byproducts such as fly ash, slag powder, steel slag powder and the like, the cost is low, the environment is protected, the defects of bad hydration conditions, difficult continuous distribution of hydration products, insufficient durability and the like of the common cementing material in a soil particle environment are overcome, the hydration products of the solidifying agent are orderly generated in time-space through the organic matching of the components in the rock-soil solidifying agent, the most compact solid distribution is formed on a microstructure, and different technical effects can be realized by adopting different formula ratios according to 'because of soil', 'because of use' and 'because of land';

3. diluting the additive into an additive solution, diluting the dispersant into a dispersant solution for later use, and effectively controlling the content change of pores of the stirred material during stirring; the method has the advantages that a vibration stirring process is adopted, so that the soil particles and the cementing material are quickly liquefied in a vibration state to form a continuous interlocking structure, the soil particles are sufficiently dispersed in a short time through the physical and chemical synergistic effects, and a mixture with high uniformity is formed, so that the sufficient strength and good fluidity of the liquefied consolidated soil are ensured while the water consumption is reduced, the vibration is not needed, the strength requirement can be met through self-compaction, the good fluidity is convenient for pumping, and the construction is more convenient;

4. according to the invention, through the use of the cementing material, the dispersing agent and the additive, a large number of closed small holes are formed in the stirred material during stirring, and the shape of the small holes in the stirred material is smaller, smoother and more uniform under the action of vibration stirring, so that the strength of the stirred material is effectively changed; meanwhile, due to the use of the cementing material, the dispersing agent and the additive, the void ratio of the mixture can be reduced, the pore diameter of the pores is reduced under the action of vibration stirring, and the strength of the stirred mixture is effectively improved; in addition, by the vibration stirring effect, harmful pores can be effectively eliminated, and the stirring mixture is ensured to have good mechanical property; the additive is a foaming agent, so that the lightweight of the liquefied consolidated soil can be realized, the hydrophobicity of the liquefied consolidated soil can be realized by the waterproof agent, the density is effectively adjusted, the impermeability is improved, the high performance of the consolidated soil is realized, and different engineering requirements are met;

5. the vibration frequency is more than or equal to 20HZ, vibration waves of more than 1500 times/min can be added to the stirred mixture, the internal friction force among the cementing material, the dispersing agent, the additive and the soil is reduced, the frequency of cross motion is increased, macro-micro uniformity is achieved, and the comprehensive quality is improved;

in a word, the liquefied consolidation soil provided by the invention takes soil as a main raw material, a certain proportion of cementing material, dispersant, additive and water are added, and a unique vibration stirring process is adopted, so that macro-scale and micro-scale uniformity is achieved, the large-flow state pumpable liquefied consolidation soil is formed, the strength and density are adjustable, the impermeability is realized, the volume is stable, the liquefied consolidation soil is green and environment-friendly, and the liquefied consolidation soil is suitable for backfilling fertilizer tanks, pipe culverts, cavities, mine pits and table backs, building foundation reinforcement, rail transit, road subgrade backfill, and additional construction of riverways, coastline outsides or riverways and lakes for impermeability and the like.

Detailed Description

Before combining the examples, the slump expansion and unconfined compressive strength of the prepared finished product need to be tested, which are as follows:

slump spread measurement

Slump spread measurements required a 1000mmx1000mm square plexiglas plate and a 80X150mm cylindrical plexiglas cylinder (both ends open). During the test, firstly, wiping off the dust on the inner wall of the organic glass cylinder and the surface of the organic glass plate by using a cleaning cloth, coating a layer of vaseline on the inner wall of the organic glass cylinder, placing the organic glass cylinder on the organic glass plate, and wetting the surface of the organic glass plate; then loading the freshly mixed liquefied consolidation soil into an organic glass cylinder, continuously vibrating in the sample loading process to ensure that the sample loading is compact, scraping the surface by using a scraper after the sample loading process is full, and wiping off samples scattered on the wall of the outer cylinder and the plate surface by using a cleaning cloth; after the sample loading is finished, the organic glass cylinder is lifted up slightly vertically, the minimum diameter and the maximum diameter of the spread mixture are measured by a steel ruler, and under the condition that the difference between the two diameters is less than 50mm, the arithmetic mean value of the two diameters is used as the slump expansion value, otherwise, the test is invalid. In order to ensure the reliability of the test, each group of samples needs to be subjected to at least 3 or more than 3 parallel tests, and the average value is taken as the final slump expansion.

Unconfined compressive strength test

No side limiting pressure instrument, maximum axial load 0.6 KN. And (3) testing the test block of 70.7mmx70.7mm prepared by the triple test die, demoulding, putting the test block into a standard curing box or a curing chamber for curing, taking out the test block from the standard curing chamber or the curing chamber after curing for a specified time, putting the cured test block on an unconfined pressure instrument, recording the maximum value displayed on the instrument, obtaining final unconfined compressive strength data by unit conversion according to unconfined compressive strength = pressure/area, and performing parallel tests for 3 times or more for each group of test samples, wherein the average value is used as the final unconfined compressive strength.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples.

Example one

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of material components is subjected to vibration stirring, the other group of material components is subjected to non-vibration stirring, and data are recorded:

soil: 80 parts of a mixture;

and (3) cementing materials: 5 parts of a mixture;

dispersant sodium polyacrylate: 0.01 part;

water: 20 parts of (1);

the cementing material comprises the following components in parts by weight:

portland cement PO 42.5: 2 parts of (1);

slag powder: 1.5 parts;

steel slag powder: 1 part;

fly ash: 0.5 part;

the soil is non-polluted soil with the particle size of soil particles being less than or equal to 20mm, the PH value being 7.2 and the plasticity index being 13.

The preparation process comprises the following steps:

s1: screening raw soil to remove impurities, and crushing the raw soil into qualified soil with the particle size of less than or equal to 20 mm;

s2: dispersing agent sodium polyacrylate and water according to the weight ratio of 1: 10 diluting for later use;

s3: preparing a cementing material: mixing 1.5 parts of slag powder, 1 part of steel slag powder and 0.5 part of fly ash to obtain a rock-soil solidifying agent, and mixing the rock-soil solidifying agent with 2 parts of Portland cement PO42.5 to prepare a cementing material for later use;

s4: firstly, performing vibration mixing on the soil and the cementing material which are measured according to the mixing ratio in a double horizontal shaft vibration stirrer for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s5: and then adding the water and the dispersing agent solution which are measured according to the mixing proportion into a double-horizontal-shaft vibration stirrer, vibrating and stirring for 60s, and sampling and testing the wet volume weight and the slump expansion degree respectively for another group of 60s without vibrating and stirring, measuring the slump expansion degree recorded data by using a phi 80x150mm cylindrical barrel, and regarding the slump expansion degree as being qualified when the slump expansion degree is larger than or equal to 90mm, wherein the maintenance system is standard maintenance: the unconfined compressive strength of the cured products of 7 days and 28 days is detected, and the detection data are recorded as shown in Table 1.

TABLE 1 statistical table of liquefied consolidation soil performance parameters of vibration/non-vibration stirring

Item	Water-to-solid ratio	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)	Wet weight (kg/m)
						Liquefied consolidated soil with vibration stirring	0.235	0.44	0.55	148	1880
Non-vibration stirring liquefied consolidated soil	0.235	0.34	0.44	135	1880

As can be seen from the above table: compared with the liquefied consolidated soil stirred without vibration in the same proportion, the liquefied consolidated soil stirred with vibration has the unconfined compressive strength (MPa) improved by 29.4 percent in 7 days, the unconfined compressive strength (MPa) improved by 25 percent in 28 days, the slump expansion improved by 9.63 percent, and the liquefied consolidated soil stirred with vibration has the obvious effect of improving the strength compared with the liquefied consolidated soil stirred without vibration.

Example two

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of the material components is subjected to vibration stirring, and the other group of the material components is subjected to non-vibration stirring and data recording:

building solid waste recycled aggregate: 100 parts of (A);

and (3) cementing materials: 20 parts of (1);

waterproofing agent potassium methylsilicate: 1 part;

water: 40 parts of a mixture;

the cementing material comprises the following components:

PS42.5 cement: 8 parts of a mixture;

red mud: 6 parts of (1);

steel slag powder: 4 parts of a mixture;

desulfurized gypsum: 2 parts of (1);

the building solid waste recycled aggregate comprises the following components: the particle size of the recycled mixed aggregate particles obtained by crushing and screening the building solid wastes is less than or equal to 4.75mm, wherein the recycled aggregate with the particle size range of 2.36mm accounts for more than 90 percent of the building solid wastes mixed aggregate, the content of organic matters is 1 weight percent, and the moisture content of the residue soil is 8 percent.

The preparation process comprises the following steps:

s1: crushing the building solid waste, screening and removing impurities to obtain a mixed recycled aggregate with a qualified particle size;

s2: mixing a waterproof agent potassium methylsilicate and water according to the weight ratio of 1: 5, diluting the solution for later use;

s3: preparing a cementing material: mixing 6 parts of red mud, 4 parts of steel slag powder and 2 parts of defluidized gypsum to obtain a rock-soil solidifying agent, and mixing the rock-soil solidifying agent with 8 parts of Portland cement PO42.5 to prepare a cementing material for later use;

s4: firstly, vibrating and mixing the building solid waste recycled aggregate and the cementing material which are measured according to the mixing proportion in a double horizontal shaft vibration stirrer for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s5: and then adding the water and the waterproof agent solution which are measured according to the mixing proportion into a double-horizontal-shaft vibration stirrer, vibrating and stirring for 60s, and sampling and testing the wet volume weight and the slump expansion degree respectively without vibrating and stirring for 60s, measuring the slump expansion degree by using a phi 80x150mm cylindrical barrel, recording data, judging that the slump expansion degree is qualified when the slump expansion degree is larger than or equal to 250mm, and performing standard maintenance by using a maintenance system: the maintenance age is 7 days and 28 days, the unconfined compressive strength is detected, and the detection data records are shown in Table 2.

TABLE 2 comparison of liquefied consolidation soil Performance parameters for vibratory/non-vibratory agitation

Item	Water-to-solid ratio	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)
					Liquefied consolidated soil with vibration stirring	0.448	1.42	2.03	312
Non-vibration stirring liquefied consolidated soil	0.448	1.13	1.51	285

From the above table: compared with the liquefied consolidated soil which is not subjected to vibration stirring, the liquefied consolidated soil which is subjected to vibration stirring and has the same proportion has the advantages that the 7-day unconfined compressive strength (MPa) is improved by 25.7 percent, the 28-day unconfined compressive strength (MPa) is improved by 34.44 percent, the slump expansion is improved by 9.47 percent, and the strength of the liquefied consolidated soil which is subjected to vibration stirring is obviously improved compared with that of the liquefied consolidated soil which is not subjected to vibration stirring.

EXAMPLE III

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of the material components is subjected to vibration stirring, and the other group of the material components is subjected to non-vibration stirring and data recording:

slurry: 90 parts of a mixture;

and (3) cementing materials: 14 parts of (1);

dispersant potassium polyacrylate: 0.25 part;

waterproofing agent sodium methylsilicate: 0.5 part;

water: 5 parts of a mixture;

the cementing material comprises the following components:

PO42.5 cement: 5 parts of a mixture;

fly ash: 4 parts of a mixture;

red mud: 3 parts of a mixture;

phosphogypsum: and 2 parts.

The particle size of the mud agglomerate grains contained in the mud is less than or equal to 20mm, the proportion of the mud agglomerate with the particle size of 5mm-20mm in the mud is not more than 5%, the PH value is 7.3, the content of organic matters is 1.5 wt%, and the water content is 60%.

The preparation process comprises the following steps:

s1: mixing a waterproofing agent sodium methylsilicate and water according to the weight ratio of 1: 5 preparing a waterproof agent solution, and mixing a dispersant potassium polyacrylate and water according to a proportion of 1: 10 preparing a dispersing agent solution;

s2: preparing a cementing material: mixing 4 parts of fly ash, 3 parts of red mud and 2 parts of phosphogypsum to obtain a rock-soil curing agent, and mixing the rock-soil curing agent with 5 parts of Portland cement PO42.5 to prepare a cementing material for later use;

s3: firstly, adding the slurry and the cementing material raw materials which are measured according to the mixing proportion into a double horizontal shaft vibration stirrer for vibration stirring for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s4: and adding the water, the waterproof agent solution and the dispersing agent solution which are measured according to the mixing ratio into a double-horizontal-shaft vibration stirrer, continuously vibrating and stirring for 60s, sampling the other part for 60s without vibrating and stirring, measuring the slump expansion degree by using a phi 80x150mm cylindrical barrel, recording data, judging that the slump expansion degree is not less than 150mm and is not more than 250mm to be qualified, carrying out standard maintenance for 7 days and 28 days in the maintenance period, detecting the unconfined compressive strength, and recording the detection data as shown in Table 3.

TABLE 3 comparison of liquefied consolidation soil Performance parameters for vibratory/non-vibratory agitation

Item	Water-to-solid ratio	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)
					Liquefied consolidated soil with vibration stirring	0.334	0.94	1.25	236
Non-vibration stirring liquefied consolidated soil	0.334	0.80	1.03	214

As can be seen from the above table: compared with the liquefied consolidated soil stirred without vibration in the same proportion, the liquefied consolidated soil stirred with vibration has the unconfined compressive strength (MPa) improved by 17.5 percent in 7 days, 14.9 percent in 28 days and 10.28 percent in slump expansion, and the liquefied consolidated soil stirred with vibration has obvious effect of improving the strength compared with the liquefied consolidated soil stirred without vibration.

Example four

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, wherein one group is subjected to vibration stirring, and the other group is not subjected to vibration stirring and data are recorded:

soil: 88 parts of (C);

and (3) cementing materials: 10 parts of (A);

dispersant sodium polyacrylate: 0.5 part;

water: 80 parts of a mixture;

the cementing material comprises the following components in parts by weight:

portland cement PO 32.5: 5 parts of a mixture;

cement clinker: 2.5 parts;

water slag powder: 1 part;

fly ash: 1.5 parts;

the soil is non-polluted soil with the particle size of soil particles being less than or equal to 20mm, the PH value being 7.2 and the plasticity index being 13.

The preparation process comprises the following steps:

s1: screening to remove impurities in the soil to obtain qualified soil with the particle size less than 20 mm;

s2: dispersing agent sodium polyacrylate and water according to the weight ratio of 1: 10 diluting for later use;

s3: preparing a cementing material: mixing 2.5 parts of cement clinker, 1 part of water slag powder and 1.5 parts of fly ash to obtain a rock-soil solidifying agent, and mixing the rock-soil solidifying agent with 5 parts of portland cement PO32.5 to prepare a cementing material for later use;

s4: firstly, performing vibration mixing on the soil and the cementing material which are measured according to the mixing ratio in a double horizontal shaft vibration stirrer for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s5: and then adding the water and the dispersant solution which are measured according to the mixing proportion into a double horizontal shaft vibration stirrer, vibrating and stirring for 60s, and sampling and measuring slump expansion recorded data by using a phi 80x150mm cylindrical barrel for another group of 60s without vibrating and stirring, wherein the slump expansion is determined to be qualified when the slump expansion is larger than or equal to 300mm, and the maintenance system is standard maintenance: the unconfined compressive strength of the cured products of 7 days and 28 days is detected, and the detection data are recorded as shown in Table 4.

TABLE 4 statistical table of liquefied consolidation soil performance parameters for vibratory/non-vibratory agitation

Item	Water-to-solid ratio	7 days unconfined compressive strength (MPa)	7 days unconfined compressive strength (MPa)	Slump spread (mm)
					Liquefied consolidated soil with vibration stirring	0.777	0.31	0.43	406
Non-vibration stirring liquefied consolidated soil	0.777	0.28	0.37	391

From the above table: compared with the liquefied consolidated soil which is not subjected to vibration stirring, the liquefied consolidated soil which is subjected to vibration stirring and has the same proportion has the advantages that the 7-day unconfined compressive strength (MPa) is improved by 10.71 percent, the 28-day unconfined compressive strength (MPa) is improved by 16.21 percent, the slump expansion is improved by 3.84 percent, and the strength of the liquefied consolidated soil which is subjected to vibration stirring is obviously improved compared with that of the liquefied consolidated soil which is not subjected to vibration stirring.

EXAMPLE five

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of the material components is subjected to vibration stirring, and the other group of the material components is subjected to non-vibration stirring and data recording:

building solid waste recycled aggregate: 20 parts of (1);

soil: 20 parts of (1);

and (3) cementing materials: 40 parts of a mixture;

polyethylene glycol type foaming agent: 0.5 part;

water: 100 parts of (A);

the cementing material comprises the following components:

PS42.5 cement: 5 parts of a mixture;

and (3) drying carbide slag: 5 parts of a mixture;

steel slag powder: 3 parts of a mixture;

fluorine gypsum: 2 parts of (1);

the building solid recycled aggregate comprises: the particle size of the recycled mixed aggregate particles obtained by crushing and screening the building solid wastes is less than or equal to 4.75mm, wherein the recycled fine aggregate particles with the particle size range of 1.18mm account for more than 85% of the residue soil of the building wastes, the content of organic matters is 1 wt%, and the water content of the residue soil is 8%.

The soil is non-polluted soil with soil particle size less than or equal to 8mm and pH of 7.

The preparation process comprises the following steps:

s1: crushing and screening the building solid waste and removing impurities to obtain qualified mixed recycled aggregate;

s2: screening the soil to remove light substances to obtain qualified soil;

s3: preparing a cementing material: mixing 5 parts of dry carbide slag, 3 parts of steel slag and 2 parts of fluorgypsum to obtain a rock-soil solidifying agent, and mixing the rock-soil solidifying agent with 5 parts of silicate cement PS42.5 to prepare a cementing material for later use;

s4: firstly, soil, building solid waste recycled aggregate and cementing material which are measured according to the mixing proportion are subjected to vibration mixing for 30s in a double horizontal shaft vibration mixer, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s5: and then adding water and a polyethylene glycol type foaming agent which are measured according to the mixing proportion into a double-horizontal-shaft vibration stirrer, vibrating and stirring for 60s, sampling the other part without vibrating and stirring for 60s, measuring the slump expansion degree by using a phi 80x150mm cylindrical barrel, recording data, judging that the slump expansion degree is qualified when the slump expansion degree is larger than or equal to 250mm, and performing standard maintenance by using a maintenance system: the maintenance age is 7 days and 28 days, the unconfined compressive strength is detected, and the detection data records are shown in Table 5.

TABLE 5 comparison of liquefied consolidation soil Performance parameters for vibratory/non-vibratory agitation

Item	Water-to-solid ratio	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)	Wet weight (kg/m)
						Liquefied consolidated soil with vibration stirring	1.24	0.51	0.66	346	840
Non-vibration stirring liquefied consolidated soil	1.24	0.46	0.59	338	840

From the above table: compared with the liquefied consolidated soil which is not subjected to vibration stirring, the liquefied consolidated soil which is subjected to vibration stirring and has the same proportion has the advantages that the 7-day unconfined compressive strength (MPa) is improved by 10.86 percent, the 28-day unconfined compressive strength (MPa) is improved by 11.86 percent, the slump expansion is improved by 2.37 percent, and the strength of the liquefied consolidated soil which is subjected to vibration stirring is obviously improved compared with that of the liquefied consolidated soil which is not subjected to vibration stirring.

EXAMPLE six

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of the material components is subjected to vibration stirring, and the other group of the material components is subjected to non-vibration stirring and data recording:

slurry: 80 parts of a mixture;

soil: 20 parts of (1);

and (3) cementing materials: 10 parts of (A);

dispersant sodium polyacrylate: 0.01 part;

waterproofing agent sodium methylsilicate: 0.5 part;

water: 10 parts of (A);

the cementing material comprises the following components:

slag powder: 3 parts of a mixture;

cement clinker: 8 parts of a mixture;

fly ash: 2 parts of (1);

steel slag powder: 2 parts of (1);

lime: 1 part;

the particle size of the mud agglomerate particles contained in the mud is less than or equal to 15mm, the proportion of the mud agglomerate with the particle size of 5mm-15mm in the mud is not more than 10%, the PH value is 7.3, the content of organic matters is 3 wt%, and the water content is 50%.

The soil is non-polluted soil with soil particle size less than or equal to 8mm and pH of 7.

The preparation process comprises the following steps:

s1: screening the soil to remove light substances to obtain qualified soil;

s2: mixing a waterproofing agent sodium methylsilicate and water according to the weight ratio of 1: 5 preparing a waterproof agent solution, and mixing a dispersant sodium polyacrylate and water according to the proportion of 1: 10 preparing a dispersing agent solution;

s3: preparing a cementing material: mixing 3 parts of slag powder, 8 parts of cement clinker, 2 parts of fly ash, 2 parts of steel slag powder and 1 part of lime to obtain a rock-soil curing agent for later use;

s4: firstly, adding water, a waterproof agent solution, a dispersing agent solution and a cementing material which are measured according to a mixing ratio into a double-horizontal-shaft vibration stirrer for vibration and stirring for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s5: adding the slurry and the soil which are measured according to the mixing proportion into a double horizontal shaft vibration stirrer, continuously vibrating and stirring for 60s, sampling the other part for 60s without vibrating and stirring, measuring the slump expansion degree by using a phi 80x150mm cylindrical barrel, recording data, judging that the slump expansion degree is not less than 100mm and not more than 180mm as qualified, and performing standard maintenance by using a maintenance system: the maintenance age is 7 days and 28 days, the unconfined compressive strength is detected, and the detection data records are shown in Table 6.

TABLE 6 comparison of liquefied consolidation soil Performance parameters for vibratory/non-vibratory agitation

Item	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)
				Liquefied consolidated soil with vibration stirring	0.92	1.35	142
Non-vibration stirring liquefied consolidated soil	0.83	1.18	128

From the above table: compared with the liquefied consolidated soil which is not subjected to vibration stirring, the liquefied consolidated soil which is subjected to vibration stirring and has the same proportion has the advantages that the 7-day unconfined compressive strength (MPa) is improved by 10.84%, the 28-day unconfined compressive strength (MPa) is improved by 14.41%, the slump expansion is improved by 10.94%, and the strength of the liquefied consolidated soil which is subjected to vibration stirring is obviously improved compared with that of the liquefied consolidated soil which is not subjected to vibration stirring.

EXAMPLE seven

The preparation method comprises the following steps of selecting 2 groups of material components in parts by mass, one group of the material components is subjected to vibration stirring, and the other group of the material components is subjected to non-vibration stirring and data recording:

building solid waste recycled aggregate: 100 parts of (A);

and (3) cementing materials: 20 parts of (1);

dispersant sodium polyacrylate: 0.3 part;

waterproofing agent sodium methylsilicate: 0.5 part;

polyethylene glycol type foaming agent: 0.2 part;

water: 100 parts of (A);

the cementing material comprises the following components:

PO42.5 cement: 8 parts of a mixture;

fly ash: 5 parts of a mixture;

steel slag powder: 2 parts of (1);

water slag powder: 3 parts of a mixture;

phosphogypsum: 2 parts of (1);

the building solid waste recycled aggregate comprises the following components: the particle size of the recycled mixed aggregate particles of the construction solid waste crushing and screening is less than 4.75mm, wherein the recycled fine aggregate particles with the particle size of less than 1.18mm account for more than 88 percent of the construction waste residue soil, the content of organic matters is 1 weight percent, and the water content is 7 percent.

The preparation process comprises the following steps:

s1: crushing and screening the building solid waste and removing impurities to obtain qualified mixed recycled aggregate;

s2: mixing a waterproofing agent sodium methylsilicate and water according to the weight ratio of 1: 5 preparing a waterproof agent solution, and mixing a dispersant sodium polyacrylate and water according to the proportion of 1: 10 preparing a dispersing agent solution;

s3: preparing a cementing material: mixing 3 parts of fly ash, 2 parts of steel slag powder, 3 parts of water slag powder and 2 parts of phosphogypsum to obtain a rock-soil curing agent, and uniformly mixing the rock-soil curing agent with 8 parts of PO42.5 cement for later use;

s4: firstly, the construction solid waste recycled aggregate and the cementing material which are measured according to the mixing proportion are subjected to vibration mixing in a double horizontal shaft vibration mixer for 30s, wherein the vibration frequency is more than or equal to 20 HZ; the other group is not started to vibrate and mix for 30 s;

s4: then, water, a waterproof agent solution and a dispersing agent solution are measured according to the mixing proportion, a foaming agent is added into a double-horizontal-shaft vibration stirrer, vibration stirring is carried out for 60s, the other part is not subjected to vibration stirring for 60s, samples are respectively taken, slump expansion is measured by using a phi 80x150mm cylindrical barrel, data are recorded, the slump expansion is judged to be qualified when being not less than 200mm, and the maintenance system is standard maintenance: the maintenance age is 7 days and 28 days, the unconfined compressive strength is detected, and the detection data records are shown in Table 7.

TABLE 7 comparison of liquefied consolidation soil Performance parameters for vibratory/non-vibratory agitation

Item	7 days unconfined compressive strength (MPa)	Unconfined compressive strength (MPa) for 28 days	Slump spread (mm)	Wet weight (kg/m)
					Liquefied consolidated soil with vibration stirring	0.61	0.80	266	1165
Non-vibration stirring liquefied consolidated soil	0.53	0.69	241	1165

From the above table: compared with the liquefied consolidated soil which is not subjected to vibration stirring, the liquefied consolidated soil which is subjected to vibration stirring and has the same proportion has the advantages that the 7-day unconfined compressive strength (MPa) is improved by 15.09%, the 28-day unconfined compressive strength (MPa) is improved by 15.94%, the slump expansion is improved by 6.22%, and the strength of the liquefied consolidated soil which is subjected to vibration stirring is obviously improved compared with that of the liquefied consolidated soil which is not subjected to vibration stirring.