1. The utility model provides an earth retaining waterproof curtain structure between stake which characterized in that includes: the retaining and water-stopping plate comprises a retaining and water-stopping plate and at least two supporting piles, wherein each supporting pile is provided with a clamping groove, the retaining and water-stopping plate is clamped in the clamping grooves of the adjacent supporting piles, and expansion materials are arranged in the clamping grooves.

2. The inter-pile soil and water retaining curtain structure of claim 1, further comprising a fixing member connected to both inner sides of the support pile, wherein a gap is formed between side planes of the fixing member to form the clamping groove; the expansion material is adhered to the two side edges of the soil-retaining water-stopping plate, and the two ends of the soil-retaining water-stopping plate provided with the expansion material can be inserted into the clamping grooves;

the supporting piles are made of steel materials; the top of the support pile is provided with a mounting hole and a hoisting hole; the pile body of the support pile is provided with a mounting hole and a hoisting hole.

3. An inter-pile soil and water retaining curtain structure as claimed in claim 2, wherein said expansion material is a strip sheet-like expansion material.

4. An inter-pile soil and water retaining curtain structure as claimed in claim 3, wherein said fixing member is an angle iron.

5. A construction method of an inter-pile soil and water retaining curtain structure applied to any one of claims 1 to 4, comprising the steps of:

s1: drilling support pile holes at adjacent designated positions;

s2: processing support piles, mounting reinforcing members on the inner sides of the support piles, forming clamping grooves by gaps between side planes of the fixing members, and then implanting the support piles into corresponding support pile holes;

s3: performing groove forming construction among the piles, namely excavating a groove hole between adjacent supporting pile holes by adopting groove forming equipment to connect the adjacent supporting pile holes;

s4: the soil-retaining water-stopping plate is composed of a plurality of panels, expansion materials are pasted on two side edges of the soil-retaining water-stopping plate through adhesives, the soil-retaining water-stopping plate is installed in the slot hole, and two ends of the soil-retaining water-stopping plate pasted with the expansion materials can be inserted into the slots;

s5: and backfilling the supporting pile hole.

6. A method of constructing an inter-pile soil and water retaining curtain structure as claimed in claim 5, wherein the verticality of the pile hole of the support pile and the verticality of the drill rod are simultaneously corrected while drilling the support pile hole in step S1.

7. A method of constructing an inter-pile soil and water retaining curtain structure as claimed in claim 6, wherein in step S3, a trenching apparatus is installed and fixed above the adjacent supporting pile holes, and the trenching apparatus is started to start the excavation of the slotted hole from top to bottom.

8. The construction method of an inter-pile soil and water retaining curtain structure according to claim 7, wherein the step S3 further comprises cleaning the sediment at the bottom of the slotted hole by using a slag-washing device and supplementing the retaining wall slurry after the slotted hole is excavated to the designed depth.

9. The construction method of an inter-pile soil and water retaining curtain structure according to claim 8, wherein the step S4 further comprises symmetrically installing lifting rings at the welding portions.

10. A method of constructing an inter-pile soil and water retaining curtain structure according to claim 9, wherein the backfill material for the supporting pile holes is weakly adhesive and low permeable material in step S5.

Background

The construction of civil engineering, water conservancy, mines, municipal administration and other infrastructures in China has attracted attention. In the processes of underground space development and utilization, mineral resource exploitation and the like, when complicated geological conditions are met, slope support or foundation pit support measures are often needed to be adopted so as to ensure the safety and stability of the underground engineering construction process and the surrounding environment in the process. With the development of geotechnical engineering technology, mechanical and civil engineering materials and the like, slope support and foundation pit support technology is effectively developed, and accordingly, support structure systems such as soil nailing walls, composite soil nailing walls, underground continuous walls, row pile supports, pile anchor supports and the like which take traditional building materials such as sand stones, cement, reinforcing steel bars, concrete and the like as structural bodies appear. Meanwhile, in order to control the influence of underground water on the supporting structure and the underground engineering construction, a waterproof curtain needs to be arranged in a supporting system or precipitation measures need to be taken as an auxiliary consideration. Particularly, under the conditions that the underground water level is high, and the side wall soil layer is soft and easy to disturb, underground water treatment measures such as precipitation or water stop must be considered for foundation pit support. The reasonable earth retaining and water stopping mode is adopted, the safety of peripheral buildings, structures and underground pipelines can be ensured, and the creep deformation of the side wall soil body induces accidents such as peripheral earth surface cracks and uneven settlement of the buildings under more conditions. The current waterproof curtain between piles mostly adopts cement soil technical measures, such as mixing piles, high-pressure jet grouting piles, TRD construction method piles and secant piles, and after the depth of the waterproof curtain is increased, although corresponding engineering measures are taken, leakage risks caused by defects still exist, and in addition, the waterproof curtain can be cracked due to excavation deformation of a foundation pit. However, from the essence of foundation pit support, the measures of temporary retaining, reinforcing, protecting and underground water control are adopted as the safety of the construction of the underground main body structure and the surrounding environment is protected, and the deeper the foundation pit is, the more complicated the surrounding environment is, the higher the construction cost of the foundation pit engineering is, and more importantly, the service life of the foundation pit is generally not more than 2 years, and the foundation pit is discarded or removed after the construction of the underground main body structure is finished, so that the construction cost of the foundation pit engineering is very high compared with the main body engineering. Even if a few foundation pits at the present stage adopt the integrated design of the supporting structure and the underground main structure, the potential risks of construction efficiency reduction, labor cost increase and subsequent construction joint leakage of subsequent foundation engineering are very high, and the treatment of the weak parts and verticality deviation of the subsequent underground continuous wall body caused by the construction process and concrete pouring is very difficult.

The SMW construction method is used as one of underground continuous wall forms, cement is used as a main wall forming material, after the SMW construction method is used, only profile steel inserted later can be recovered, the recovery rate is low, and the SMW construction method must be matched with an inner support and an anchor cable for use. The inner support and the anchor cable are dismantled, the manufacturing cost is very high, and great adverse effects are brought to the construction of subsequent underground structural engineering. In addition, the reinforced concrete underground diaphragm wall, as the most common form, is not only high in cost, but also basically has no recycling value. Therefore, a retaining and water stopping structure capable of effectively solving the retaining and water stopping requirements of an assembled supporting structure and reducing the manufacturing cost is needed.

Disclosure of Invention

The invention provides a retaining and water-stopping curtain structure between piles and a construction method thereof, aiming at the development requirements of excavation and support of various projects such as foundation pits, side slopes, subway station mouths, municipal pipelines and the like, the problems that the existing compound assembly type recyclable foundation pit supporting structure is insufficient in retaining and water-stopping functions and high in manufacturing cost.

In order to achieve the above object, the present invention provides an inter-pile soil-retaining and water-stopping curtain structure, including: the retaining and water-stopping plate comprises a retaining and water-stopping plate and at least two supporting piles, wherein each supporting pile is provided with a clamping groove, the retaining and water-stopping plate is clamped in the clamping grooves of the adjacent supporting piles, and expansion materials are arranged in the clamping grooves.

Preferably, the inter-pile soil and water retaining curtain structure further comprises fixing pieces, the fixing pieces are connected to two inner sides of the support piles, and a gap is formed between side planes of the fixing pieces to form the clamping groove; the expansion material is adhered to the two side edges of the soil-retaining water-stopping plate, and the two ends of the soil-retaining water-stopping plate provided with the expansion material can be inserted into the clamping grooves;

the supporting piles are made of steel materials; the top of the support pile is provided with a mounting hole and a hoisting hole; the pile body of the support pile is provided with a mounting hole and a hoisting hole.

Preferably, the intumescent material is a strip-like sheet-like intumescent material.

Preferably, the fixing piece is an angle steel.

Further preferably, the present invention also provides a construction method suitable for the above-mentioned inter-pile soil and water retaining curtain structure, the construction method comprising the steps of:

s1: drilling support pile holes at adjacent designated positions;

s2: processing support piles, mounting reinforcing members on the inner sides of the support piles, forming clamping grooves by gaps between side planes of the fixing members, and then implanting the support piles into corresponding support pile holes;

s3: performing groove forming construction among the piles, namely excavating a groove hole between adjacent supporting pile holes by adopting groove forming equipment to connect the adjacent supporting pile holes;

s4: the soil-retaining water-stopping plate is composed of a plurality of panels, expansion materials are pasted on two side edges of the soil-retaining water-stopping plate through adhesives, the soil-retaining water-stopping plate is installed in the slot hole, and two ends of the soil-retaining water-stopping plate pasted with the expansion materials can be inserted into the slots;

s5: and backfilling the supporting pile hole.

Preferably, in step S1, the perpendicularity of the support pile hole and the perpendicularity of the drill rod are corrected simultaneously when the support pile hole is drilled.

Preferably, in step S3, a fixed trenching apparatus is installed above the adjacent supporting pile holes, and the trenching apparatus is started to begin to excavate the slotted hole from top to bottom.

Preferably, step S3 further includes cleaning the sediment at the bottom of the slotted hole by using a slag-washing device and supplementing the retaining wall slurry after the slotted hole is dug to the designed depth.

Preferably, step S4 further includes symmetrically installing the lifting ring at the welding location.

Preferably, in step S5, the backfill material for the support pile hole is a weak-viscosity and low-permeability material.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

firstly, the method comprises the following steps: according to the inter-pile soil-retaining and water-stopping curtain structure, in a flexible composite assembly type recyclable foundation pit supporting structure system, the cross-section structural design of the supporting piles is combined, the soil-retaining and water-stopping plates are adopted, and the expansion materials are arranged in the clamping grooves, so that the functions of soil retaining and water stopping are realized, the situation that the traditional inter-pile soil-retaining and water-stopping curtain mostly adopts cement-soil building technology is changed, the design and construction processes are simplified, after the using function is exerted, the efficient recycling and the repeated utilization of the inter-pile soil-retaining and water-stopping curtain structure can be realized, and the essential characteristics of foundation pit engineering as temporary safety measures are truly embodied.

II, secondly: the flexible composite function is exerted more definitely, the toughness of the soil-retaining water-stopping plate and the strip-shaped expansion material is well exerted to play a 'flexible' role, the soil-retaining and water-stopping functions are jointly formed, meanwhile, the pile hole and the slotted hole are filled, the stress mutation of the main stressed supporting structure and the side wall soil body is relieved, the seepage prevention of the joint part and the lateral creep control of the soil body are simultaneously realized, and the leakage in the excavation process can be effectively avoided.

Thirdly, the method comprises the following steps: the supporting piles are made of steel materials, mechanical and processing properties of the steel materials and water swelling and seepage preventing properties of strip and sheet expansion materials are fully combined, the water seepage defect existing in the traditional inter-pile soil retaining and water stopping curtain and the construction process thereof is effectively overcome, the characteristics of ultra-thin groove forming construction of inter-pile soil are fully utilized, and subsequent recovery and reutilization of the soil retaining and water stopping plates are facilitated.

Fourthly, the method comprises the following steps: the construction is quick, the later frequent maintenance is not needed, the subsequent construction of foundation pit engineering can be accelerated by the water swelling of the swelling material, compared with the traditional cement-soil building supporting structure system, the traditional cement-soil building supporting structure system has long construction period, the subsequent work can be carried out only by completely forming the cement-soil building, the demolition construction period of the inner support and the anchor rope is long, and the construction period can be saved by more than 50 percent by combining the supporting piles with the soil-retaining water-stop plates.

Fifthly: the comprehensive economic and environmental protection benefits are more advantageous. Compared with the traditional inter-pile soil and water retaining curtain, the inter-pile soil and water retaining curtain structure provided by the invention has the greatest characteristics that the pollution of dust, cement, concrete and the like to the environment can be reduced during construction, meanwhile, slurry generated in the construction process can be treated and then harmlessly discharged, and after the foundation pit is used, the subsequent recovery value is high, the repeated use is realized, and the application range is wider.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic top half-sectional view of a waterproof curtain structure between piles;

FIG. 2 is a schematic cross-sectional view of a water curtain structure supported between piles;

FIG. 3 is a schematic cross-sectional view of a hole formed by adjacent support piles;

fig. 4 is a schematic top view of the processed support pile;

FIG. 5 is a schematic side view of a post-fabrication retaining pile;

FIG. 6 is a schematic view of the construction of trench formation of soil between piles;

FIG. 7 is a schematic top view of a water stop plate for retaining soil;

fig. 8 is a schematic front view of the earth-retaining water-stopping plate.

[ description of reference ]

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention provides an inter-pile soil retaining and water stopping curtain structure, as shown in fig. 1 and 2, comprising: the soil retaining and water stopping plate 10 and the at least two supporting piles 2 are provided with clamping grooves 5, the soil retaining and water stopping plate 10 is clamped in the clamping grooves 5 of the adjacent supporting piles 2, and expansion materials 13 are arranged in the clamping grooves 5.

According to the inter-pile soil-retaining and water-stopping curtain structure, in a flexible composite assembly type recyclable foundation pit supporting structure system, the cross-section structural design of the supporting piles is combined, the soil-retaining and water-stopping plates are adopted, and the expansion materials are arranged in the clamping grooves, so that the functions of soil retaining and water stopping are realized, the situation that the traditional inter-pile soil-retaining and water-stopping curtain mostly adopts cement-soil building technology is changed, the design and construction processes are simplified, after the using function is exerted, the efficient recycling and the repeated utilization of the inter-pile soil-retaining and water-stopping curtain structure can be realized, and the essential characteristics of foundation pit engineering as temporary safety measures are truly embodied.

In a preferred embodiment, the inter-pile soil and water retaining curtain structure further comprises fixing pieces 4, the fixing pieces 4 are connected to both inner sides of the support piles 2, and a gap is formed between the side planes of the fixing pieces 4 to form a clamping groove 5; the expansion materials 13 are adhered to the two side edges of the soil-blocking water-stopping plate 10, the expansion materials 13 can be adhered to the two sides of the clamping groove 5, and the two ends of the soil-blocking water-stopping plate 10 provided with the expansion materials 13 can be inserted into the clamping groove 5; the supporting pile 2 is preferably made of steel material; the supporting pile 2 is preferably made of steel materials, on one hand, the steel materials are good in processing performance, on the other hand, the recycling value is high, and the supporting pile 2 can also be made of concrete and other novel materials. The top of the support pile 2 is provided with a mounting hole 6 and a hoisting hole 7; the pile body of the support pile 2 is provided with a mounting hole 6 and a hoisting hole 7.

More preferably, the expansion material 13 is a strip sheet expansion material, preferably a strip sheet water expansion material, the expansion material adhered to the water stop and retaining plate self-expands when meeting water, the front and back surfaces of the two side edges of the water stop and retaining plate 10 are both adhered firmly by using an adhesive, and the adhered area is cleaned before adhesion.

In addition, referring to fig. 1 and 2, the fixing member 4 may be preferably an angle steel, the support pile 2 may be preferably an i-shaped steel, a gap may be formed between side planes of the angle steel to form a slot 5, the angle steel and the support pile 2 may be welded or bonded, or may be bolted with the aid of an elastic expansion material, and the slot 5 may be formed not only in the angle steel but also in a member with another cross section. As shown in fig. 1, four right angles of the four angle steels are intensively arranged, so that the four angle steels form a hollow cross structure, one side of each of the two specific angle steels is symmetrically arranged on one side of the middle steel body of the support pile 2, the other two angle steels are symmetrically arranged on the other side of the middle steel body of the support pile 2, one side of one of the angle steels is welded with the middle steel body of the support pile 2, and the other side of the other angle steel forms a gap with the plane of the other angle steel which is oppositely arranged, so that a clamping groove 5 is formed between the side planes of the two angle steels.

The invention also provides a construction method suitable for the inter-pile soil and water retaining curtain structure, which comprises the following steps:

s1: drilling a supporting pile hole 3 at an adjacent designated position; specifically, referring to fig. 3, by combining the characteristics of the stratum, the hole forming construction of the support pile 2 is performed on the designated ground 1 by adopting appropriate drilling equipment, the equipment with better pile hole verticality control is optimized, and the hole collapse prevention measures are taken.

S2: processing a supporting pile 2, mounting a reinforcing member on the inner side of the supporting pile 2, forming a clamping groove 5 by a gap between side planes of a fixing member 4, and then implanting the supporting pile 2 into a supporting pile hole 3; specifically, referring to fig. 4 and 5, the supporting pile 2 can be prefabricated in a factory or processed on site according to the size of the supporting pile 2 in the design drawing, fixed angle steel is installed on two sides of the supporting pile 2 to form a clamping groove 5 for limiting the movement of the retaining water stop plate 10, and meanwhile, a mounting hole 6 and a hoisting hole 7 are arranged at the top of the supporting pile 2 and at the corresponding position of the pile body; the supporting piles 2 can adopt finished section steel or can be welded combined steel members; the angle steel and the support pile 2 can be welded or bonded, and can also be in bolt connection with the assistance of the elastic expansion material. When the supporting pile 2 is implanted, the hoisting equipment and the plane positioning correction platform are utilized to accurately implant the processed supporting pile 2 into the determined pile hole position so as to meet the requirement of designed positioning accuracy.

S3: performing groove forming construction among the piles, namely excavating a groove hole 9 between the adjacent supporting pile holes 3 by adopting groove forming equipment 8 to connect the adjacent supporting pile holes 3; specifically, referring to fig. 6, a grooving device 8 is installed and fixed above adjacent supporting pile holes 3, the grooving device 8 can be started by taking the supporting piles 2 as anchoring counter-force supporting points, forward grooving construction can be started from top to bottom, so that ultrathin grooving construction of soil between piles is completed, and ultrathin slotted holes are obtained, or processes of reverse grooving, horizontal punching grooving and vertical punching grooving are performed, and as the slotted holes 9 are thin grooves, in order to prevent the slotted holes 9 from collapsing, the mud proportion of the retaining wall can be further improved. After the groove is formed to the designed depth, the pile hole is cleaned by adopting slag-washing equipment or a reverse circulation pump, and fresh wall-protecting slurry is properly supplemented. By means of the unique ultra-thin groove forming construction of the inter-pile soil, and through brand-new design and processing of the cross sections of the soil-blocking water-stopping plates and the supporting piles, the cross section characteristics of the supporting piles, the toughness of the soil-blocking water-stopping plates and the expansion characteristics of strip-shaped water-self-expanding materials are fully exerted, and the soil-blocking water-stopping function among the piles of the flexible assembly type recyclable supporting structure is achieved together.

S4: the soil-blocking water-stopping plate 10 is composed of a plurality of panels 11, the panels 11 can be welded into a whole according to specific requirements to form the soil-blocking water-stopping plate 10, expansion materials 13 are adhered to two side edges of the soil-blocking water-stopping plate 10 through adhesives, the soil-blocking water-stopping plate 10 is installed in the slotted hole 9, and two ends of the soil-blocking water-stopping plate 10 adhered with the expansion materials 13 can be inserted into the clamping grooves 5; or the expandable material 13 may be adhered to both sides of the card slot 5. Specifically, as shown in fig. 7 and 8, the panel 11 is welded and lengthened to the designed length to form the soil-blocking and water-stopping plate 10, and meanwhile, the hoisting rings 12 are symmetrically installed on the welding part uniformly, the front and back surfaces of the two side edges of the soil-blocking and water-stopping plate 10 are bonded firmly with the strip-shaped expansion material by using the bonding agent, before bonding, the bonding area is cleaned, and the soil-blocking and water-stopping plate 10 is implanted: by utilizing the hoisting equipment, the processed soil-blocking water-stop plate 10 is accurately implanted into the clamping grooves 5 of the two adjacent retaining piles 2, so that the designed positioning precision requirement is met.

S5: and (3) backfilling the supporting pile hole 3, wherein the backfilling materials of the supporting pile hole 3 and the slotted hole 9 adopt weak-adhesion low-permeability materials 14. The groove hole 9 can be backfilled or not, when the retaining and water-stopping curtain structure between the piles is disassembled, the retaining and water-stopping plate 10 can be disassembled by lifting the lifting ring 12 with the lifting equipment. Specifically, the backfill material of the supporting pile hole is preferably a weak-viscosity and low-permeability material so as to assist in realizing the water stop function, and other bulk materials can also be adopted. When recycling needs are not considered, the concrete can be filled with a cementing material such as plain concrete. When filling the pile hole, the pressure irrigation is preferably carried out from the bottom to the top of the pile hole, and the filling is as full as possible.

The soil-retaining and water-stopping curtain structure between the piles forms a soil-retaining and water-stopping function through self expansion, the strip sheet-shaped expansion materials which are adhered to the front surface and the back surface of the two side edges of the soil-retaining and water-stopping plate 10 absorb moisture and gradually expand under the influence of underground water and soil humidity, and the soil-retaining and water-stopping plate 10 and the clamping grooves 5 on the two sides of the supporting piles 2 are filled with the water-retaining and water-stopping curtain structure, so that the function of water-retaining and soil-stopping is realized.

It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.