1. A construction method for in-situ cold regeneration of a road macadam foundation is characterized by comprising the following steps: the method comprises the following steps:

firstly, milling: milling and planing a damaged road surface by using a milling and planing machine;

secondly, sampling: sampling the milled material milled in the first step, stirring and mixing the sampled material with crushed stones, cement and water in different proportions, respectively measuring the drying shrinkage performance and the compactness of the milled material, and selecting the blending proportion of the crushed stones, the cement and the water according to the measurement result and the set compactness;

thirdly, batching;

fourthly, cleaning: removing impurities such as garbage, iron blocks and the like on the original road surface, and removing road edge stones on two sides of the original road surface;

fifthly, paving;

sixthly, compacting;

seventhly, checking: on-site technicians check the transverse gradient and the flatness in time, ensure that the repaired pavement has flat, compact and non-wheel-track appearance, and install road edge stones on two sides of the pavement;

eighthly, health preserving: and after each item is detected to be qualified, immediately covering the geotextile, spraying water, preserving for health, wherein the preserving time is not less than 7 days, keeping the surface of the regeneration layer in a wet state in the whole preserving period, implementing traffic control on the repaired road section, and forbidding various vehicles to run on the repaired road section in the preserving period.

2. The construction method for in-situ cold recycling of the road macadam foundation according to claim 1, which is characterized in that: the third step comprises the following steps:

s1: crushing the larger milling material by a crusher;

s2: and (4) adding the milling material, the broken stone, the cement and the water into a stirrer according to the blending proportion selected in the step two, and mixing and stirring.

3. The construction method for in-situ cold recycling of the road macadam foundation according to claim 1, which is characterized in that: the fifth step comprises the following steps;

s1: marking out a laid boundary line by using lime;

s2: and (5) dragging the stirrer, pouring the stirred material in the step three S2 on the damaged road surface, stabilizing the pressure by adopting a vibratory roller, and detecting the water content.

4. The construction method for in-situ cold recycling of the road macadam foundation according to claim 1, which is characterized in that: the sixth step comprises the following steps:

s1: adopting a land leveler for primary leveling and fine leveling, and manually matching leveling and detecting the flatness;

s2: vibrating and pressing by adopting a vibrating roller;

s3: re-pressing by adopting a rubber-tyred road roller;

s4: and detecting the compaction degree, comparing the measured compaction degree value with a set compaction degree value, and if the measured compaction degree is smaller than the set compaction degree value, continuously re-pressing by using the rubber-tyred roller and measuring the compaction degree until the measured compaction degree is larger than the set compaction degree value.

5. The utility model provides a construction equipment of highway rubble basic unit cold in situ regeneration, characterized by includes:

a tractor (2);

the stirring device comprises a stirring barrel (1), wherein a stirring mechanism (4) is fixedly arranged at the top end of the stirring barrel (1), a stirring structure (5) is arranged in the stirring barrel (1), and a discharge hole (7) is formed in one side of the stirring barrel (1) away from the head of the tractor (2);

the stirring barrel (1) is fixedly arranged on the tractor (2) through being provided with a plurality of supporting legs (3), and the stirring structure (5) is driven through a motor (6) arranged on the lower end face of the stirring barrel (1).

6. The construction equipment for cold in-place recycling of road macadam foundation as claimed in claim 5, wherein: the stirring structure (5) comprises:

the stirring shaft (50), the stirring shaft (50) and the stirring barrel (1) are coaxially arranged;

the stirring blade (51) is a spiral blade, and is fixedly arranged on the outer surface of the stirring shaft (50);

the arc-shaped bulges (53) are distributed on the inner wall of the stirring barrel (1) at equal intervals on the circumference, and the axial height dimension of the arc-shaped bulges (53) is the same as that of the stirring blade (51);

wherein, the stirring blade (51) is provided with a plurality of interference flow holes (52).

7. The construction equipment for cold in-place recycling of road macadam foundation as claimed in claim 6, wherein: the stirring structure (5) further comprises:

the stirring device comprises three arc push rods (54), wherein the three arc push rods (54) are distributed on the outer surface of the bottom end of the stirring shaft (50) at equal intervals, and the other ends of the arc push rods extend to the inner wall of the stirring barrel (1) and are in contact with each other.

8. The construction equipment for cold in-place recycling of road macadam foundation as claimed in claim 5, wherein: the mixing tank (1) further comprises:

the discharge chute (8), the said discharge chute (8) is fixed on discharge port (7);

the chute (9), the said chute (9) is set up in the upper surface in the discharge port (7);

the striker plate (10), the striker plate (10) is connected with the chute (9) in a sliding manner;

wherein, striker plate (10) keep away from one side top of axle center and fixedly be equipped with handle (11), spout (9) keep away from one side of axle center and offer opening (12) with handle (11) looks adaptation, the surface hinge of agitator (1) is connected and is equipped with rectangular ring (13) that are used for fixed handle (11).

9. The construction equipment for cold in-place recycling of road macadam foundation as claimed in claim 5, wherein: the mashing mechanism (4) comprises:

a feed hopper (40);

the stirring device comprises a plurality of stirring cylinders (41), wherein the stirring cylinders (41) are hinged at the junction of a feed hopper (40) and a stirring barrel (1) at equal intervals;

wherein, the bottom end of the feed hopper (40) is fixedly connected with the top end of the stirring barrel (1) and is in smooth transition.

10. The construction equipment for cold in-place recycling of road macadam foundation as claimed in claim 9, wherein: a plurality of said crushing cylinders (41) each comprising:

an inner shaft (410);

an outer tub (411);

a plurality of elastic pieces (412) which are distributed between the inner shaft (410) and the outer cylinder (411) at equal intervals;

wherein, the outer surface of the outer cylinder (411) is provided with friction increasing grains (413).

Background

The highway is a public road which is approved by a highway administration department and can drive automobiles in cities, towns and villages, most of the built and under-built grade highways in China are water-stable semi-rigid base asphalt pavements, the semi-rigid base asphalt pavements have high strength and bearing capacity, and the semi-rigid base asphalt pavements have the characteristics of high strength at the later stage and continuous increase along with the age, so that the semi-rigid base asphalt pavements become one of the most main pavement structure types of the high-grade highways in China, the major repair work of the highways becomes very urgent along with the annual increase of traffic volume and the increase of service life, and the important problem of how to better finish the major repair of the highways and reduce the damage to the environment becomes the development of the highways.

Traditional maintenance of highway mainly adopts the milling machine to mill and mill damaged road surface, paves the new road surface again, and this kind of mode can prolong the time limit for a project on the one hand, and on the other hand can increase the cost, need handle milling old material, very easily causes the pollution to the environment during piling up, and adopts the cold regeneration construction technique of plantmix, has disclosed a cold in place milling hot regeneration asphalt road repair technique like chinese patent application number (CN2014106114237), and its implementation process is: the waste road surface is milled by a cold milling machine, waste materials can be utilized by 100 percent, the waste materials do not need to be transported to a workshop for processing, pollution and waste are not caused, the materials after cold milling are crushed and directly enter a heating bin of a heat regenerator, a cold milling heat regenerant is added, stirring and mixing are carried out, paving is carried out by a paver with an ironing plate, the materials are compacted by a large-tonnage compactor immediately after compaction, a small vibration road roller is adopted for rolling the joints, but sampling detection is not carried out in the technical process, so that the mixed broken stones, cement and water are mixed in a messy proportion, a good regeneration effect cannot be obtained, and the service performance of the road is ensured.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a construction method and construction equipment for in-situ cold regeneration of a road macadam foundation, which are cost-saving and short in construction period.

In order to achieve the purpose, the invention provides the following technical scheme: a construction method for in-situ cold regeneration of a road macadam foundation comprises the following steps:

firstly, milling: milling and planing a damaged road surface by using a milling and planing machine;

secondly, sampling: sampling the milled material milled in the first step, stirring and mixing the sampled material with crushed stones, cement and water in different proportions, respectively measuring the drying shrinkage performance and the compactness of the milled material, and selecting the blending proportion of the crushed stones, the cement and the water according to the measurement result and the set compactness;

thirdly, batching;

fourthly, cleaning: removing impurities such as garbage, iron blocks and the like on the original road surface, and removing road edge stones on two sides of the original road surface;

fifthly, paving;

sixthly, compacting;

seventhly, checking: on-site technicians check the transverse gradient and the flatness in time, ensure that the repaired pavement has flat, compact and non-wheel-track appearance, and install road edge stones on two sides of the pavement;

eighthly, health preserving: and after each item is detected to be qualified, immediately covering the geotextile, spraying water, preserving health, wherein the preserving time is not less than seven days, keeping the surface of the regeneration layer in a wet state in the whole preserving period, implementing traffic control on the repaired road section, and forbidding various vehicles to run on the repaired road section in the preserving period.

The invention is further configured to: the third step comprises the following steps:

s1: crushing the larger milling material by a crusher;

s2: and (4) adding the milling material, the broken stone, the cement and the water into a stirrer according to the blending proportion selected in the step two, and mixing and stirring.

The invention is further configured to: the fifth step comprises the following steps;

s1: marking out a laid boundary line by using lime;

s2: and (5) dragging the stirrer, pouring the stirred material in the step three S2 on the damaged road surface, stabilizing the pressure by adopting a vibratory roller, and detecting the water content.

The invention is further configured to: the sixth step comprises the following steps:

s1: adopting a land leveler for primary leveling and fine leveling, and manually matching leveling and detecting the flatness;

s2: vibrating and pressing by adopting a vibrating roller;

s3: re-pressing by adopting a rubber-tyred road roller;

s4: and detecting the compaction degree, comparing the measured compaction degree value with a set compaction degree value, and if the measured compaction degree is smaller than the set compaction degree value, continuously re-pressing by using the rubber-tyred roller and measuring the compaction degree until the measured compaction degree is larger than the set compaction degree value.

A construction equipment for cold in-place recycling of road macadam base course comprises:

a tractor;

the stirring device comprises a stirring barrel, wherein a stirring mechanism is fixedly arranged at the top end of the stirring barrel, a stirring structure is arranged in the stirring barrel, and a discharge hole is formed in one side of the stirring barrel, which is far away from the head of the tractor;

the stirring barrel is fixedly arranged on the tractor through a plurality of supporting legs, and the stirring structure is driven by a motor arranged on the lower end face of the stirring barrel.

The invention is further configured to: the stirring structure includes:

a stirring shaft which is coaxially arranged with the stirring barrel,

the stirring blade is a spiral blade and is fixedly arranged on the outer surface of the stirring shaft;

the arc-shaped bulges are distributed on the inner wall of the stirring barrel at equal intervals on the circumference, and the axial height dimension of the arc-shaped bulges is the same as that of the stirring blades;

wherein, be equipped with if disturb the discharge orifice on the stirring vane.

The invention is further configured to: the stirring structure further includes:

the arc push rods are three, the circumference of one end of each arc push rod is distributed at equal intervals and fixed on the outer surface of the bottom end of the stirring shaft, and the other end of each arc push rod extends to the inner wall of the stirring barrel and is in contact with the inner wall of the stirring barrel.

The invention is further configured to: the agitator still includes:

the discharge chute is fixedly arranged on the discharge port;

the chute is arranged on the upper surface in the discharge port;

the striker plate is connected with the sliding groove in a sliding manner;

the stirring barrel is characterized in that a handle is fixedly arranged at the top end of one side, away from the axis, of the baffle plate, an opening matched with the handle is formed in one side, away from the axis, of the sliding groove, and a rectangular ring used for fixing the handle is hinged to the outer surface of the stirring barrel.

The invention is further configured to: the crushing mechanism comprises:

a feed hopper;

the stirring device comprises a plurality of stirring cylinders, a stirring barrel and a stirring device, wherein the stirring cylinders are hinged at the junction of a feed hopper and the stirring barrel at equal intervals;

wherein, the bottom end of the feed hopper is fixedly connected with the top end of the stirring barrel and is in smooth transition.

The invention is further configured to: a plurality of the crushing cylinders all comprise

An inner shaft;

an outer cylinder;

the elastic pieces are distributed between the inner shaft and the outer cylinder at equal intervals;

wherein, the surface of urceolus is equipped with increases friction line.

The invention has the beneficial effects that:

1. the milled old material is directly utilized on site in the construction process, so that the cost is saved, the construction period is short, the old material is utilized, the exploitation amount of a new material is greatly reduced, the problems of transportation and stacking of the old material do not exist, and the requirement of environmental protection is fundamentally met;

2. the optimized proportion of the added broken stones, the cement and the water is determined through sampling, a better regeneration effect is achieved, too much or too little broken stones, cement and water are prevented from being added, and the service performance and the comfort of a road are guaranteed.

Drawings

FIG. 1 is a schematic view showing the construction equipment of the present invention;

FIG. 2 is an enlarged view of the invention at A in FIG. 1;

FIG. 3 is a schematic structural view of the mixing tank of the present invention;

FIG. 4 is an enlarged view of the invention at B in FIG. 3;

in the drawings: 1. a stirring barrel; 2. a tractor; 3. supporting legs; 4. a mincing mechanism; 40. a feed hopper; 41. crushing the cylinder; 410. an inner shaft; 411. an outer cylinder; 412. an elastic member; 413. increasing friction lines; 5. a stirring structure; 50. a stirring shaft; 51. a stirring blade; 52. a flow-disturbing hole; 53. an arc-shaped bulge; 54. an arc push rod; 6. a motor; 7. a discharge port; 8. a discharge chute; 9. a chute; 10. a striker plate; 11. a handle; 12. an opening; 13. a rectangular ring.

Detailed Description

The invention is further described in the following with reference to fig. 1 to 4 in a specific embodiment:

example 1:

the embodiment provides a construction method for in-situ cold regeneration of a road macadam base, which comprises the following steps:

firstly, milling: milling and planing a damaged road surface by using a milling and planing machine;

secondly, sampling: sampling the milled material milled in the first step, stirring and mixing the sampled material with crushed stones, cement and water in different proportions, respectively measuring the drying shrinkage performance and the compactness of the milled material, and selecting the blending proportion of the crushed stones, the cement and the water according to the measurement result and the set compactness;

thirdly, batching;

fourthly, cleaning: removing impurities such as garbage, iron blocks and the like on the original road surface, and removing road edge stones on two sides of the original road surface;

fifthly, paving;

sixthly, compacting;

seventhly, checking: on-site technicians check the transverse gradient and the flatness in time, ensure that the repaired pavement has flat, compact and non-wheel-track appearance, and install road edge stones on two sides of the pavement;

eighthly, health preserving: after each item is detected to be qualified, immediately covering the geotextile, spraying water, preserving health, wherein the preserving time is not less than seven days, keeping the surface of the regeneration layer in a wet state in the whole preserving period, implementing traffic control on the repaired road section, and forbidding various vehicles to run on the repaired road section in the preserving period;

the embodiment can see that the milled old material is directly utilized on site in the construction process, so that the cost is saved, the construction period is short, the old material is utilized, the exploitation amount of a new material is greatly reduced, the problems of transportation and stacking of the old material are avoided, and the requirement of environmental protection is fundamentally met; and the optimized proportion of adding the broken stones, the cement and the water is determined through sampling, so that a better regeneration effect is realized, the excessive or insufficient addition of the broken stones, the cement and the water is avoided, and the service performance and the comfort of the road are guaranteed.

Example 2:

in this embodiment, in addition to the steps of embodiment 1, step three further includes the steps of:

s1: crushing the larger milling material by a crusher;

s2: adding the milling material, the crushed stone, the cement and the water into a stirrer according to the blending proportion selected in the step two, and mixing and stirring;

wherein, the crushed stone is preferably 5-10mm in size;

according to the embodiment, the larger milling and planing material is firstly crushed by the crusher, so that the subsequent mixing effect with broken stones, cement and water is better, gaps can be reduced after subsequent laying, and the compactness is improved.

Example 3:

in this embodiment, in addition to the steps of embodiment 1, further, step five includes the following steps;

s1: marking out a laid boundary line by using lime;

s2: dragging the stirrer, pouring the stirred material in the step III S2 on the damaged road surface, stabilizing the pressure by adopting a vibratory roller, and detecting the water content;

according to the embodiment, the stirring materials are poured on the damaged road surface by drawing the stirring machine, and the vibratory roller is adopted to continue stabilizing the pressure, so that the labor intensity of constructors is effectively reduced, and the working efficiency of the constructors is improved.

Example 4:

in this embodiment, in addition to the steps of embodiment 1, step six further includes the following steps:

s1: adopting a land leveler for primary leveling and fine leveling, and manually matching leveling and detecting the flatness;

s2: vibrating and pressing by adopting a vibrating roller;

s3: re-pressing by adopting a rubber-tyred road roller;

s4: detecting the compaction degree, comparing the measured compaction degree value with a set compaction degree value, if the measured compaction degree is smaller than the set compaction degree value, continuously carrying out re-pressing by using a rubber-tyred roller and measuring the compaction degree until the measured compaction degree value is larger than the set compaction degree value;

the grader preferably adopts a PY180 specification model, the vibratory roller preferably adopts a 22T specification model, and the rubber-tyred roller preferably adopts a 30T specification model;

this embodiment can see, through look for many times with compaction and manual coordination level, detect the roughness, improve the restoration effect, guarantee that the outward appearance on restoration road surface is level and smooth, closely knit and no wheel mark to the manual coordination is made level, is detected the roughness, detects the compaction degree value simultaneously, and contrasts with setting for the compaction degree value, guarantees that restoration road surface accords with relevant standard, further guarantees that the outward appearance on restoration road surface is level and smooth, closely knit and no wheel mark.

Example 5:

the embodiment provides a construction equipment of cold regeneration in place of highway rubble basic unit, includes:

a tractor 2;

the stirring device comprises a stirring barrel 1, wherein a stirring mechanism 4 is fixedly arranged at the top end of the stirring barrel 1, a stirring structure 5 is arranged in the stirring barrel 1, and a discharge hole 7 is formed in one side of the stirring barrel 1, which is far away from the head of the tractor 2;

the stirring barrel 1 is fixedly arranged on the tractor 2 through a plurality of supporting legs 3, the stirring structure 5 is driven by a motor 6 arranged on the lower end face of the stirring barrel 1, the supporting legs 3 are preferably welded with the stirring barrel 1, and the supporting legs and the tractor 2 are preferably fixedly arranged through bolts;

according to the embodiment, the larger milling and planing material is firstly crushed by the crusher, so that the subsequent mixing effect with broken stones, cement and water is better, gaps can be reduced after the subsequent paving, the compactness is improved, and the stirring material is poured on the road surface to be repaired conveniently by the discharge port 7.

Example 6:

in this embodiment, in addition to the structural features of embodiment 5, further, the stirring structure 5 includes:

the stirring shaft 50 is coaxially arranged with the stirring barrel 1;

the stirring blade 51 is a helical blade, and is fixedly arranged on the outer surface of the stirring shaft 50;

the arc-shaped bulges 53 are circumferentially distributed on the inner wall of the stirring barrel 1 at equal intervals, and the axial height dimension of the arc-shaped bulges 53 is the same as that of the stirring blades 51;

the stirring blade 51 is provided with a plurality of interference flow holes 52, the stirring blade 51 is preferably connected with the rotating shaft through bolts, and the arc-shaped protrusions 53 are preferably integrally formed with the stirring barrel 1;

this embodiment can see out, be helical shape through stirring vane 51, promote the stirring material axial flow in the agitator 1, through a plurality of arc-shaped protrusion 53 in the agitator 1, make the stirring material radial flow in the agitator 1, consequently, through the stirring material axial flow in making agitator 1 and radial flow improve the stirring effect in the agitator 1 by a wide margin, improve the mixed effect of stirring material, thereby improve the road surface repair effect after the follow-up laying, wherein if interference flow hole 52 on stirring vane 51 has the vortex effect, further improve the stirring effect.

Example 7:

in this embodiment, in addition to the structural features of embodiment 6, the stirring structure 5 further includes:

three arc push rods 54 are provided, one end of each arc push rod 54 is circumferentially distributed and fixed on the outer surface of the bottom end of the stirring shaft 50 at equal intervals, and the other end of each arc push rod 54 extends to the inner wall of the stirring barrel 1 and is contacted with the inner wall;

the arc push rod 54 and the stirring shaft 50 are preferably in interference fit, and the surface of the arc push rod 54 is preferably lubricated;

according to the embodiment, the stirring materials in the stirring barrel 1 can be conveniently pushed to the discharge hole 7 through the arc-shaped push rod 54, the stirring materials can flow to one side far away from the axis under the centrifugal effect to a certain extent through the surface lubrication treatment of the arc-shaped push rod 54, the discharging from the discharge hole 7 is facilitated, and the working efficiency of paving equipment working hours is effectively improved.

Example 8:

in this embodiment, in addition to the structural features of embodiment 5, the mixing tank 1 further includes:

the discharge chute 8 is fixedly arranged on the discharge port 7;

the chute 9 is arranged on the upper surface in the discharge hole 7;

the striker plate 10 is connected with the sliding groove 9 in a sliding manner;

a lifting handle 11 is fixedly arranged at the top end of one side, away from the axis, of the striker plate 10, an opening 12 matched with the lifting handle 11 is formed in one side, away from the axis, of the chute 9, a rectangular ring 13 for fixing the lifting handle 11 is hinged to the outer surface of the stirring barrel 1, welding is preferably adopted between the discharge chute 8 and the outer surface, located at the discharge port 7, of the stirring barrel 1, and the lifting handle 11 is preferably connected with the striker plate 10 through bolts;

according to the embodiment, the material baffle 10 is convenient to control the opening and closing of the material outlet 7, the lifting handle 11 is convenient for constructors to operate, the rectangular ring 13 is convenient to limit and fix the material baffle 10 in the opening process of the material outlet 7, and the discharging efficiency of the material outlet 7 is improved.

Example 9:

in this embodiment, in addition to the structural features of embodiment 5, further, the mincing mechanism 4 includes:

a feed hopper 40;

a plurality of stirring cylinders 41, wherein the stirring cylinders 41 are hinged at equal intervals at the junction of the feed hopper 40 and the stirring barrel 1;

wherein, the bottom end of the feed hopper 40 is fixedly connected with the top end of the mixing barrel 1 and is in smooth transition, the mincing cylinder 41 is preferably driven by a motor, the motor is preferably arranged on the outer surface of the mixing barrel 1, the motor drive is the prior mature technology, the motor drive is not marked in the drawings of the specification, and the skilled person can know that the technology is not disclosed herein;

this embodiment can see out, through the rotation of stirring up drum 41 to make the milling material of great piece roll and be broken, improve subsequent mixed effect, stir simultaneously that rubbing crusher constructs 4 and 1 integration of agitator sets up, effectively improves constructor's work efficiency.

Example 10:

in this embodiment, in addition to the structural features of embodiment 9, further, a plurality of the crushing cylinders 41 are provided

An inner shaft 410;

an outer tub 411;

a plurality of elastic members 412, which are circumferentially distributed between the inner shaft 410 and the outer cylinder 411 at equal intervals;

the outer surface of the outer cylinder 411 is provided with friction increasing threads 413, and the elastic member 412 is preferably a spring, and can also be a rubber member or other elastic material;

in this embodiment, it can be seen that, through the plurality of elastic members 412, when the crushing cylinder 41 rotates, the outer cylinder 411 has radial runout, so as to improve the effect of crushing the milled material, and the friction resistance between the milled material and the surface of the outer cylinder 411 is improved by increasing the friction lines 413, so as to prevent the milled material from slipping on the surface of the outer cylinder 411, and further improve the effect of crushing the milled material.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.