CN111335333A - Mounting and dismounting method of flexible surface layer soil nailing wall support - Google Patents

Abstract

The embodiment of the invention provides an installation and disassembly method of a flexible surface layer soil nailing wall support, which comprises the following steps: drilling holes on the surface of the soil body corresponding to the positions of the soil nail holes on the flexible surface layer, and arranging a first row of soil nails in the first row of drilled holes; laying a flexible surface layer, sleeving first soil discharging nail holes on the rolled flexible surface layer on the first soil discharging nails, unfolding the rolled flexible surface layer to enable the soil nail holes on the flexible surface layer to be laid corresponding to the soil nail holes on the surface of the soil body, and arranging soil nails in the soil nail holes where the flexible surface layer is laid; a soil nail joint is arranged on the soil nail, and the soil nail joint is provided with a clamping groove; mounting a connecting rod in a clamping groove of the soil nail joint, and fixing the connecting rod on the soil nail joint through a bolt; the flexible surface layer is subjected to inflation loading through air holes formed in the flexible surface layer; the invention improves the assembly efficiency and the assembly quality, can recycle the supporting materials and the soil nailing wall members for repeated utilization, saves resources and is green and environment-friendly.

Description

Mounting and dismounting method of flexible surface layer soil nailing wall support

Technical Field

The invention relates to the field of constructional engineering, in particular to a method for installing and disassembling a flexible surface layer soil nailing wall support.

Background

The soil nailing wall is a supporting and retaining structure which is formed by combining natural soil bodies, soil nails and reinforcing mesh which are reinforced on site and sprayed concrete panels to resist the soil pressure behind the wall like a gravity retaining wall. The soil nailing wall has the advantages of convenient application, simple construction equipment, high construction speed, low construction cost and the like, so the soil nailing wall is widely applied to the construction of foundation pits, side slopes and the like. With the improvement of environmental awareness of the country, the problems in the traditional soil nailing wall support are more and more exposed. After the soil nailing wall completes the supporting function, the soil nailing wall is directly buried in the soil body and cannot be recycled, so that the waste of materials and the pollution of soil are caused; the soil nails are hard and are difficult to cut after being driven into the soil layer, so that difficulty is caused in utilizing the surrounding underground space; when the concrete surface layer is sprayed, dust and air pollution are generated. Environmental pollution and air pollution problem that cause in traditional soil nailing wall construction need urgently to solve, need to research and develop a new soil nailing wall and strut system, realize retrieving reuse, and the work progress can not cause the pollution of environment.

Various types of fabricated earth-nailed walls have been developed, of which flexible faced earth-nailed wall supports are a typical representative, but these techniques suffer from the following drawbacks:

the flexible surface layer has larger deformation and can not be closely attached to the side slope soil body, and the side slope soil body is easy to deform greatly and even damage, so that the landslide is caused; underground water or rainwater cannot be discharged after permeating into the slope body, and side slope damage and collapse are easy to occur; the damage of the flexible surface layer can cause the integral damage of the side slope; the soil nails merely serve a fixation function.

Disclosure of Invention

In order to solve the problems, the embodiment of the invention provides a mounting and dismounting method of a flexible surface layer soil nailing wall support, aiming at improving the assembly efficiency and the assembly quality and recycling the support material and the soil nailing wall component for recycling.

In order to achieve the above object, in one aspect, an embodiment of the present invention provides an installation method of a flexible surface layer soil nailing wall support, including:

s101, drilling holes on the surface of a soil body corresponding to the positions of soil nail holes on the flexible surface layer, and arranging first row soil nails in the first row of drilled holes;

s102, laying a flexible surface layer, sleeving first soil discharging nail holes in the rolled flexible surface layer on first soil discharging nails, unfolding the rolled flexible surface layer, and laying the soil nail holes in the flexible surface layer corresponding to the soil nail holes in the soil body surface, wherein the soil nails are arranged in the soil nail holes in which the flexible surface layer is laid;

s103, mounting a soil nail joint on the soil nail, wherein the soil nail joint is provided with a clamping groove;

s104, mounting a connecting rod in a clamping groove of the soil nail joint, and fixing the connecting rod on the soil nail joint through a bolt;

and S105, inflating and loading the flexible surface layer through the air holes formed in the flexible surface layer.

In one aspect, an embodiment of the present invention provides a method for disassembling a flexible surface layer soil nailing wall support, where the method includes:

deflating and unloading the double-layer geomembrane;

disassembling the connecting rods, wherein the disassembling sequence is carried out from the lower part to the upper part of the surface of the soil body;

disassembling the soil nail joint, wherein the disassembling sequence is carried out from the lower part to the upper part of the surface of the soil body;

and (4) recovering the flexible surface layer, and rolling up the flexible surface layer upwards after the connecting rod and the soil nail joint at the lowest part of the ground surface are disassembled until all the members are recovered.

The technical scheme has the following beneficial effects: the method for mounting and dismounting the flexible surface layer soil nailing wall support has the advantages that the adopted materials and parts are pollution-free and waste-free; each part has strong universality and is easy to identify, so that the installation and the disassembly are simple, the error is not easy to occur, the construction quality is easy to ensure, and each part has light weight and can be recycled and reused; the GFRP composite material panel is easy to cut and has strong adaptability; the construction process of the soil nailing wall can be standardized, the assembly efficiency and the assembly quality are improved, and meanwhile, the supporting materials and the soil nailing wall components can be recycled for repeated utilization, so that the method is green and environment-friendly.

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 drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a flexible surface soil nailing wall support of the embodiment of the invention without soil nails;

FIG. 2 is a schematic diagram of the overall structure of a flexible faced soil nailed wall support of an embodiment of the present invention including soil nails;

FIG. 3 is a schematic front view of the overall construction of a flexible faced concrete nailed wall support of an embodiment of the present invention;

FIG. 4 is a schematic diagram of a soil nailing joint of a flexible faced soil nailed wall support of an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a mounting structure of soil nails, soil nail joints and connecting rods of a flexible surface soil nail wall support according to an embodiment of the invention.

Reference numbers in the figures: 1-strip steel plate, 2-soil nail joint, 3-connecting rod, 4-double-layer geomembrane, 5-geotextile, 6-soil nail, 7-nut, 8-bolt, 9-bolt hole, 10-soil nail hole, 11-air hole, 12-clamping groove and 13-sticking part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

All components of the soil nailing wall are standard parts, can be prefabricated in a factory, and can be assembled only by assembling the components on site. And excavating earthwork on the side of the foundation pit side slope, paving a soil nail wall on the side of the foundation pit side slope, and preloading by inflating to ensure that the flexible surface layer is closely attached to the side slope soil body to bear soil pressure together. After the supporting is finished, the flexible surface layer is deflated, and the flexible surface layer is recycled after the joint and the connecting rod which are fixed by the screw cap and the bolt are disassembled. The construction method improves the assembly efficiency and the assembly quality, can recycle the supporting materials, and repeatedly utilizes the soil nailing wall member for many times, thereby being green and environment-friendly.

The invention has the following characteristics: no pollution, no waste and no grouting; each component has strong universality and is easy to identify, so that the installation and the disassembly are simple, the error is not easy to occur, and the construction quality is easy to ensure; after the flexible surface layer is inflated and loaded, the soil nailing wall support can be ensured to be closely attached to the side slope soil body, and the side slope soil body is stressed together, so that the side slope soil body is prevented from being damaged and collapsed; all components are light in weight and can be recycled; the double-layer geomembrane surface layer is not easy to damage and can be inflated and loaded; the geotextile plays a role in filtering, so that fine particles are prevented from losing, and the deformation and even collapse of the side slope soil body are avoided; the edge of the top of the flexible surface layer is locked by steel bars, and the flexible surface layer can be prevented from falling off and the slope top soil body is prevented from deforming and collapsing after the soil nails are installed.

As shown in fig. 1 and 2, the overall structure of the earth nailing wall support of the embodiment of the present invention after the installation is completed;

according to the embodiment of the invention, as shown in fig. 1 and fig. 2, the method for installing the flexible surface layer soil nailing wall support comprises the following steps:

all components of the soil nailing wall are standard parts, can be prefabricated in a factory, and only the components need to be assembled on the site, so that the operation difficulty of constructors is reduced, and the components of the soil nailing wall can be replaced and reused.

S101, drilling holes on the surface of a soil body corresponding to the positions of soil nail holes 10 on the flexible surface layer, and arranging first row soil nails 6 in the first row of drilled holes;

s102, laying a flexible surface layer, sleeving a first soil nail discharge hole 10 in the rolled flexible surface layer on a first soil nail discharge hole, unfolding the rolled flexible surface layer, and laying the soil nail hole 10 in the flexible surface layer corresponding to the soil nail hole in the soil body surface, wherein the soil nail 6 is arranged in the soil nail hole in which the flexible surface layer is laid;

s103, mounting a soil nail joint 2 on the soil nail 6, wherein the soil nail joint 2 is provided with a clamping groove 12;

s104, installing a connecting rod 3 in the clamping groove 12 of the soil nail joint 2, and fixing the connecting rod 3 on the soil nail joint 2 through a bolt 8;

and S105, inflating and loading the flexible surface layer through the air holes 11 arranged on the flexible surface layer.

Preferably, the flexible facing is completed by:

the flexible surface layer is composed of a double-layer geomembrane 4 and a geotextile 5, the geotextile 5 is arranged at the lower side of the double-layer geomembrane 4, and the peripheries of the geotextile 5 and the double-layer geomembrane 4 are adhered together;

the double-layer geomembrane 4 and the geotextile 5 are in edge locking through an upper strip steel plate 1 and a lower strip steel plate 1 along the width direction, wherein the width of each flexible surface layer is 4m-6m, and the length is determined according to the depth of the side slope support.

Preferably, as shown in fig. 3, soil nailing holes 10 are dug in the double-layer geomembrane 4, the peripheries of the soil nailing holes 10 are welded by a welding machine, and hollow circular rings are installed on the reserved soil nailing holes 10 to protect the soil nailing holes 10.

Preferably, the sticking part 13 is arranged in the middle of the flexible surface layer formed by enclosing the soil nail holes 10 on each 4 flexible surface layers, and the two layers of membranes are stuck together by welding at the sticking part, so that the middle of the geomembrane is prevented from bulging too much after being inflated.

Preferably, a water outlet is reserved at the sticking part 13, the water outlet does not penetrate through the geotextile 5, and a water outlet pipe is installed at the water outlet and connected with a drainage ditch.

Preferably, soil nail 6 is hollow tubular structure, and the design of at least one end of soil nail 6 has the screw thread, can install nut 7, soil nail connects 2 and soil nail 6 and passes through nut 7 fixed, and soil nail 6 material is glass fiber reinforced polymer composite.

Preferably, as shown in fig. 4 and 5, the size of the soil nail joint 2 is 500mm 20mm, and the soil nail joint is made of aluminum alloy material, the soil nail hole 10 is reserved in the middle of the soil nail joint 2, a cuboid with the size of 100mm 10mm is dug out on each of four edges of the soil nail joint, a groove is formed for reserving the clamping groove 12, and 4 bolt holes 9 are arranged at the bottom of the clamping groove and are arranged in a square shape.

Preferably, as shown in fig. 4 and 5, the connecting rod 3 is made of an aluminum alloy material, the plane size of the connecting rod is 100mm x 900mm x 16mm, the thickness of the connecting rod within a length range of 100mm from two ends is 10mm, the connecting rod is inserted into the reserved clamping groove 12 of the soil nail joint 2, two ends of the connecting rod 3 are respectively provided with 4 bolt holes 9 corresponding to the bolt holes 9 on the soil nail joint 2, and the connecting rod 3 and the soil nail joint 2 are fixed through bolts 8.

Preferably, a drainage ditch is arranged at the toe of the soil body surface, and water in the soil body of the side slope is guided into the drainage ditch through a drainage pipe and drained away.

The embodiment of the invention also provides a method for disassembling the flexible surface layer soil nailing wall support, which comprises the following steps:

deflating and unloading the double-layer geomembrane, wherein deflation is performed from the lower layer to the upper layer in sequence;

disassembling the connecting rod in sequence from the lower layer to the upper layer;

disassembling the soil nail joint, screwing out a screw cap on the soil nail joint, and disassembling the soil nail joint, wherein the disassembling sequence of the soil nail joint is also from the lower layer to the upper layer;

and (4) recovering the flexible surface layer, after the connecting rod and the soil nail joint on the lowest layer are disassembled, rolling up the flexible surface layer upwards, and when one layer is disassembled, rolling up the flexible surface layer upwards until all the components are recovered, and waiting for next recycling.

It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary systems. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying system claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.

In one embodiment, the novel soil nailing wall structure is: the flexible surface layer soil nail wall is composed of components such as a flexible surface layer, a joint, a connecting rod, a soil nail and a drainage ditch.

The flexible surface layer is composed of a double-layer geomembrane 4 and a geotextile 5, the geotextile 5 is arranged at the lower layer, the geomembrane 4 is arranged at the upper layer, the peripheries of the geomembrane 4 are welded and adhered together through a welding machine, and the welding width is 50cm, such as a gray shadow part in the figure; after welding, the double-layer geomembrane forms a closed bag-shaped object; the upper and lower strip steel plates 1 are overlooked along the width direction of the double-layer geomembrane 4 and the geotextile 5 to form a whole. Each width of the flexible surface layer is 4-6 m, and the length is determined according to the depth of the slope support.

Soil nail holes 10 are reserved on the flexible surface layer, the flexible surface layer is covered on the top of the slope, the spacing of the reserved soil nail holes is 1.5m, the flexible surface layer is supported on the slope, and the spacing of the reserved soil nail holes is 1.2 m; the periphery of a soil nail hole dug in the geomembrane is welded through a welding machine, and a hollow circular ring is arranged on the reserved soil nail hole to protect the soil nail hole. The flexible surface layer that covers on the slope, length is 0.8m ~ 1.2m, double-deck geomembrane 4 and geotechnological cloth 5 in this length section, paste together completely through the welding, the flexible surface layer in the surplus length section, geotechnological cloth 5 is partd with bagged double-deck geomembrane 4, but in the middle of the flexible surface layer that every 4 soil nail holes 10 enclose, arrange and paste the position, it is rectangle or circular that the position size of pasting is the length of a side or the diameter is about 10cm, interval 20cm is about, be arranged for the quincunx, make two-layer membrane paste together through welding at pasting the position, it is too big to prevent that the middle of geomembrane from bulging after aerifing. And a water outlet is reserved at the sticking part as required, the water outlet does not penetrate through the geotextile 5, and a water outlet pipe is arranged at the water outlet and is connected with the drainage ditch.

The flexible surface layer is in a roll shape, and can be opened when needed and rolled up for storage when not needed. The flexible surface layer and each component are processed in a factory in advance and only need to be assembled on site.

According to the flexible surface layer soil nailing wall supporting system, flexible surface layers are installed in different frames, the width of each frame is 4-6 m, the frames are sequentially assembled along the length direction of a side slope, the overlapping length of the two flexible surface layers is 50cm, namely the bonding width of the two sides of each flexible surface layer is obtained; the length of the surface layer is cut according to the depth of the slope and cannot be less than the sum of the horizontal length of the slope top, the length of the slope surface and the reserved length of the slope foot. Lay the flexible surface course on domatic, geotechnological cloth contact side slope soil body, geotechnological cloth's effect has three points, and the pressure of the soil body behind the bearing wall is secondly played the effect of taking the counter worries, prevents behind the wall that soil body granule loses along with the rivers in the soil layer, and thirdly protects double-deck geomembrane, prevents that geomembrane direct contact soil body from being pricked by sharp-pointed thing in the soil body, influences the gas tightness. The positions of the soil nails and the soil nail holes on the flexible surface layer are consistent, and the construction positions of the soil nails are determined according to the positions of the soil nail holes on the flexible surface layer. The initial laying position of the flexible surface layer is the top of the slope, and the laying length of the top of the slope is 0.8-1.2 m. The flexible surface layer is reversely hung on the slope surface in an L shape, the flexible surface layer is fixed at the top of the slope surface by soil nails, and the soil nails at the top of the slope surface are vertically driven into the soil body. The flexible surface layer on the top of the slope is all pasted together by three layers, only the mounting joint is needed, the connecting rod is not needed, and after the joint is mounted, the connecting rod is mounted between two adjacent joints on the flexible surface layer on the slope. The slope foot is provided with a drainage ditch, and water in the soil body of the side slope is guided into the drainage ditch through a drainage pipe and is drained away.

After assembly is completed, the double-layer geomembrane is inflated and preloaded after each excavation cycle or excavation is carried out to the pit bottom. And all the components are recycled after the supporting is finished.

The specific installation steps are as follows:

1) and excavating earthwork in the first step. And excavating the soil body in a layered and segmented manner, wherein the excavation depth of each layer of soil body is 1.2m, and the first layer of soil body is excavated by 30 cm. And (4) after the excavation is finished, slope repairing is carried out, and the slope is guaranteed to be smooth and has no exposed slope surface of a sharp object.

2) And (6) paying off and positioning. Determining the positions of soil nails on the slope surface according to the reserved soil nail holes on the flexible surface layer, and then lofting; the distance from the first soil discharge nail at the top of the slope to the slope surface is the same. In the construction process, the position of the soil nail is adjusted while construction is carried out, and the soil nail hole reserved in the flexible surface layer can be connected in an abutting mode.

3) And constructing GFRP soil nails on the top of the slope. The GFRP soil nail on the top of the slope plays a role of fixing the flexible surface layer, so the length of the soil nail is set to be 2 m-3 m, and the soil nail is not too long. And drilling the first row of soil nails according to the pay-off position. And mounting a positioning bracket on the GFRP soil nail every 2m, and slowly putting the GFRP soil nail into a drilled hole after the soil nail hole is drilled.

4) And constructing a first row of GFRP soil nails on the slope surface. The GFRP soil nail length is prefabricated according to design requirements, the soil nail length and the model of the whole side slope are kept consistent as much as possible, the length is designed by taking 1 as a modulus, and appropriate cutting can be carried out on site as required. The construction method is as step 3.

5) And laying a flexible surface layer. The flexible facing has been previously processed in roll form and has been lockstitched with a 1-bar steel plate at the starting position. How much to roll down when constructing. The first row of soil nail holes on the flexible surface layer are sleeved on soil nails constructed on the top of the slope, and then the rolled flexible surface layer is downwards placed according to the position of the first slope soil nail, so that the reserved soil nail holes on the flexible surface layer are sleeved on the slope soil nail row. And the redundant flexible surface layer is continuously hung on the side slope in a roll shape and is placed down after the lower-layer soil nail construction is finished.

6) And installing joints on the top of the slope and the slope surface. The connector is sleeved into the GFRP soil nail through a soil nail hole reserved on the connector, and then a nut is screwed into the GFRP soil nail to fix the connector and the GFRP soil nail.

7) And installing a connecting rod. The connecting rod is arranged in a reserved clamping groove on the joint, the flexible surface layer is pressed, and then the joint and the connecting rod are fixed through bolts. The connecting rod only needs to be installed at the slope surface, the connecting rod does not need to be installed between the two joints at the slope top, and only one joint needs to be installed.

8) The first flexible surface layer is pre-loaded by air inflation through the air holes. The slope soil body and the flexible surface layer are tightly attached to bear force jointly through the preloading of the double-layer geomembrane by inflating.

9) And (5) repeating the steps 1-8 until the support of the whole slope surface is completed.

The disassembling and recovering steps are as follows:

1) and (5) deflating and unloading the double-layer geomembrane. And air is discharged through the air holes, so that the pressure of the flexible surface layer and the slope soil body is unloaded. The air release sequence is carried out from bottom to top, the air release of the lower soil body is carried out firstly, and then the air release is carried out from top to bottom in sequence.

2) And (5) disassembling the connecting rod. The transverse connecting rods are firstly disassembled, then the longitudinal connecting rods are disassembled, and the disassembly sequence is from the lower layer to the upper layer.

3) And (5) disassembling the joint. And screwing out the screw cap on the joint, and disassembling the joint. The joint disassembly sequence is also from bottom to top.

4) And recovering the flexible surface layer. After the pressure plate, the connecting rod and the joint on the lowest layer are disassembled, the flexible surface layer is rolled upwards to form a roll shape and is hung on the slope surface. The flexible facing is rolled up one layer at a time each layer is removed.

5) And (5) repeating the steps 1-4 until all the components are completely recovered, and waiting for next recycling.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A method for installing a flexible surface course soil nailing wall support is characterized by comprising the following steps:

s101, drilling holes on the surface of a soil body corresponding to the positions of soil nail holes on the flexible surface layer, and arranging first row soil nails in the first row of drilled holes;

s102, laying a flexible surface layer, sleeving first soil discharging nail holes in the rolled flexible surface layer on first soil discharging nails, unfolding the rolled flexible surface layer, and laying the soil nail holes in the flexible surface layer corresponding to the soil nail holes in the soil body surface, wherein the soil nails are arranged in the soil nail holes in which the flexible surface layer is laid;

s103, mounting a soil nail joint on the soil nail, wherein the soil nail joint is provided with a clamping groove;

s104, mounting a connecting rod in a clamping groove of the soil nail joint, and fixing the connecting rod on the soil nail joint through a bolt;

and S105, inflating and loading the flexible surface layer through the air holes formed in the flexible surface layer.

2. A method of installing a flexible face sheet soil nailing wall support as claimed in claim 1 wherein the flexible face sheet is completed by the steps of:

the flexible surface layer is composed of a double-layer geomembrane and a geotextile, the geotextile is arranged at the lower side of the double-layer geomembrane, and the peripheries of the geotextile and the double-layer geomembrane are adhered together;

and the double-layer geomembrane and the geotextile are subjected to overlocking through an upper strip steel plate and a lower strip steel plate along the width direction of the double-layer geomembrane and the geotextile.

3. A method of installing a flexible faced earth-nailed wall support as claimed in claims 1 and 2, wherein said earth-nailed holes are made by:

and forming holes in the double-layer geomembrane, welding and sticking the double-layer geomembrane on the hole circumference by a welding machine, and installing hollow rings on the hole circumference to form soil nail holes.

4. The method for installing a soil nailing wall support of a flexible surface course as claimed in claim 3, wherein an adhering part is arranged in the middle of the flexible surface course surrounded by every 4 soil nailing holes, and two layers of geomembranes are adhered together by welding at the adhering part.

5. The method of installing a flexible face layer soil nailing wall support of claim 4, wherein a water outlet is provided at the bonding site, the water outlet penetrates through the bonding site of the double-layer geomembrane, and the water outlet does not penetrate through the geotextile.

6. The method of claim 1, wherein the soil nails are hollow tubular structures, wherein at least one end of each soil nail is provided with a thread, the soil nail joints and the soil nails are fixed by nuts, and the soil nails are made of glass fiber reinforced polymer composite materials.

7. The method for installing a flexible surface course soil nailing wall support according to claim 1, wherein the soil nailing joint is made of aluminum alloy material, a soil nailing hole is arranged in the middle of the soil nailing joint, a clamping groove is respectively arranged on four sides of the upper surface of the soil nailing joint, and a bolt hole is arranged at the bottom of the clamping groove.

8. The method of claim 7, wherein the connecting rod is made of aluminum alloy, the two ends of the connecting rod are inserted into the slots of the soil nail joint, the two ends of the connecting rod are respectively provided with bolt holes, the bolt holes of the connecting rod are arranged corresponding to the bolt holes of the soil nail joint, and the bolt fixes the connecting rod and the soil nail joint through the bolt holes of the connecting rod and the slots.

9. The method for installing a flexible surface course soil nailing wall support according to claim 1, wherein a drainage ditch is arranged at the toe of the soil body surface, and water in the soil body of the side slope is guided into the drainage ditch through a drainage pipe and drained away.

10. A method for disassembling a flexible surface layer soil nailing wall support is characterized by comprising the following steps:

deflating and unloading the double-layer geomembrane;

disassembling the connecting rods, wherein the disassembling sequence is carried out from the lower part to the upper part of the surface of the soil body;

disassembling the soil nail joint, wherein the disassembling sequence is carried out from the lower part to the upper part of the surface of the soil body;

and (4) recovering the flexible surface layer, and rolling up the flexible surface layer upwards after the connecting rod and the soil nail joint at the lowest part of the ground surface are disassembled until all the members are recovered.

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