A new type of retaining wall and construction method for inhibiting landslide development

Abstract

The present invention relates to a new type of retaining wall and construction method for suppressing the development of landslides, and belongs to the field of landslide geological disaster prevention and control. A composite foundation is designed, and the lower end surface is stepped and laid under the seepage retaining wall; the seepage retaining wall is hollow inside the wall body, and a seepage seam is provided on one side; the anchoring is strengthened and connected to the seepage retaining wall, wherein the automatic anchoring is provided with an automatic installation system composed of a PID controller, a frequency converter and an electric control valve, etc., and the threaded anchor pile can provide a strong anti-overturning torque for the retaining wall; the rock and soil impact prevention device is designed with a two-stage buffer structure and installed on the top of the seepage retaining wall; the high-load anti-sliding pile is provided with a load plate and a bottom block and fixed on one side of the composite foundation; the drainage system is designed with a rainwater interception and drainage device and a water collection pipeline to reduce the water content of the landslide body and delay its development. The retaining wall of the present invention has multiple functions such as anti-overturning, anti-sinking, anti-rock and soil impact, rainwater interception and drainage, and suppression of landslide development.

Description

Technical Field

[0001] The invention relates to a novel retaining wall for inhibiting the development of landslide and a construction method thereof, belonging to the field of landslide geological disaster prevention and control. Background Art

[0002] Landslide refers to the phenomenon that the soil and rock mass on the slope slides down the slope in whole or in part along a certain weak surface or weak zone due to the influence of various factors and the action of gravity. Landslide disaster is a geological disaster with great harm, and the development of landslide needs to be controlled and suppressed.

[0003] At present, the structures used for landslide control mainly include: cantilever pile retaining wall, anchor pile retaining wall, gravity retaining wall, reinforced soil retaining wall, inclined pile self-balancing retaining wall, etc. Traditional retaining wall is not convenient for effectively draining the accumulated water in the soil, which leads to the softening of soil by accumulated water and causes landslide, and it is not possible to effectively fix the retaining wall in the foundation, which leads to soil collapse. Therefore, it is particularly important to eliminate and reduce the harm of water to landslide. Its role is to reduce the pore water pressure and dynamic water pressure, prevent the softening and dissolution and decomposition of rock and soil, and eliminate or reduce the scouring and wave impact of water. On the other hand, small landslides or rock and soil impact the upper side of the retaining wall with large impact inertia, which can easily cause the retaining wall to collapse or the wall surface to rupture, affecting safety. In short, the traditional retaining support system has a limited scope of application when facing complex geological conditions. In addition to controlling landslides, it is also necessary to solve problems such as anti-slip, load-bearing, drainage, overturning, subsidence and impact. It is difficult for a single high-load anti-slip pile or retaining wall to solve the above problems at the same time.

[0004] Therefore, in order to solve the above problems, a new retaining wall is needed which has an efficient drainage system, a foundation with good load-bearing, anti-sinking and anti-overturning capabilities, a stable structure with sufficient anti-slip ability and a rock and soil impact protection device. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of retaining wall and construction method for inhibiting the development of landslides, to design a retaining wall with the capabilities of retaining soil, resisting sliding, bearing weight, draining, preventing overturning, preventing subsidence, preventing impact and inhibiting the development of landslides, and at the same time to propose a retaining wall construction method that reduces soil resource waste and simplifies the process.

[0006] The present invention mainly solves the following problems:

[0007] (1) Design a composite foundation to avoid ground settlement, lateral sliding and overturning. Construction can be carried out in soft soil areas, avoiding large-scale deep excavation, high-fill replacement or reinforcement treatment, thus saving project investment.

[0008] (2) Design the cushion layer to effectively transfer the upper load to the lower stable foundation to avoid its horizontal transformation and affect the stability of the landslide body;

[0009] (3) Design a high-load anti-slip pile group, use load plates and inclined plates to change the original force direction, improve the vertical support force of the rock and soil, and enhance the anti-sinking and anti-slip capabilities of the high-load anti-slip piles;

[0010] (4) Design seepage joints, rainwater interception and drainage structures, and stratum water drainage structures to drain rainwater and groundwater from the landslide body in a timely manner and delay the development of the landslide body;

[0011] (5) Design anti-rock impact devices to prevent rock and soil from directly hitting the retaining wall surface and causing cracks on the retaining wall surface, effectively protecting the integrity of the wall and extending its service life;

[0012] (6) The radial threaded anchor piles are designed to reduce the number of anchoring devices used and the project investment compared to traditional anchor retaining walls;

[0013] (7) Design an automated anchoring system with a PID control system to achieve automatic installation and simplify the construction process;

[0014] (8) Concave and convex fitting surfaces and positioning screws are provided between adjacent retaining wall blocks to improve the overall stability of the retaining wall.

[0015] In order to achieve the above object, the technical solution of the present invention is as follows.

[0016] A new type of retaining wall for inhibiting the development of landslides, comprising a high-load anti-slide pile 1, a composite foundation 21, a cushion layer 22, a foundation platform 23, a water collection tank 24, a water seepage retaining wall 3, an automated anchor 4, a corbel 51, a drag reduction protection mechanism 52, a fixed ring belt 53, a threaded anchor pile 54, a rainwater interception and drainage device 61, a rainwater collector 62, a rainwater manifold 63, a water collection pipeline 71, a water pump unit 72, a water storage tank 73, and a rock and soil impact prevention device 8;

[0017] One side of the composite foundation 21 is connected to the high-load anti-slip pile 1, and the upper part is provided with a cushion layer 22, a foundation platform 23, and a water collecting tank 24. The seepage retaining wall 3 is located on the upper part of the water collecting tank 24, embedded in the landslide body 9 through the automatic anchoring 4, and connected to the threaded anchor pile 54 through the corbel 51 and the drag reduction protection mechanism 52. The top of the threaded anchor pile 54 is provided with a fixed ring belt 53. The end of the rainwater interception and drainage device 61 is provided with a rainwater collector 62, which is connected to the water reservoir 73 through a rainwater manifold 63. One end of the water collecting pipeline 71 is respectively connected to the high-load anti-slip pile 1, the composite foundation 2 and the water collecting tank 33, and the other end is connected to the water reservoir 73 through a water pump unit 72. The anti-rock and soil impact device 8 is installed on the top of the seepage retaining wall 3.

[0018] Furthermore, the high-load anti-sliding pile 1 is composed of a pile column 11, a load plate 12, and a sand-free permeable concrete layer 13;

[0019] The pile column 11 is a hollow triangular prism, the upper part of which forms an angle of 30 to 50 degrees with the load plate 12, and the lower surface is provided with two layers of permeable holes. A sand-free permeable concrete layer 13 is laid outside the permeable holes, and an inclined plate is provided at the bottom to block it. Water in the surrounding soil layer can enter the pile column 11 through the permeable holes and be collected, and then be pumped into the water storage tank 73 through the water collection pipeline 71, thereby reducing the moisture content of the soil layer around the pile column 11, enhancing the soil shear resistance, and preventing soil softening.

[0020] Furthermore, the composite foundation 21 is composed of a front wall 211, a tooth wall 212, a rib beam 213, a cross beam 214, a wire mesh 215, a filter layer 216 and a top cover 217;

[0021] The tooth wall 212 is a load-bearing wall with a stepped structure, with three steps at the bottom, and each step is provided with 3 to 5 cross beams 214. A wire mesh 215 and a filter layer 216 are laid on the cross beams 214. The front end of the tooth wall 212 is provided with a front wall 211, the rear end is provided with a rib beam 213, and the top is provided with a top cover 217. The tops of the front wall 211 and the rib beams 213 are higher than the top of the tooth wall 212. Water in the soil layer can enter the composite foundation 21 through the filter layer 216 and be collected inside, and then be pumped into the water storage tank 73 through the water collection pipeline 71, thereby reducing the moisture content of the surrounding soil layer, enhancing the soil shear resistance, preventing soil softening, and improving the anti-overturning ability of the composite foundation 21.

[0022] Furthermore, the seepage retaining wall 3 is composed of a seepage retaining wall block 31, a filling material 32, and a positioning screw 33;

[0023] The seepage retaining wall block 31 is provided with a seepage seam 35 on the end face close to the landslide body. The upper and lower end faces are concave-convex contact surfaces and are provided with three groups of positioning screws 33. A group of positioning screws 33 close to the landslide body passes through the flat circular ring of the automatic anchor 4 to fix it. The filling material 32 is laid in the internal and external gaps of the seepage retaining wall block 31. Water flows through the interior of the retaining wall block 31 under the action of gravity and gathers in the water collecting pool 24. It is pumped into the water storage tank 73 through the water collecting pipeline 71, thereby reducing the moisture content of the soil layer around the retaining wall block 31, enhancing the soil shear resistance, and preventing soil softening.

[0024] Furthermore, the automated anchor 4 is provided with a hydraulically driven barb structure 41 on the outside, with flat circular rings and pointed tips at both ends, a pressure sensor is installed inside the pointed tip, and the automatic hydraulic inlet 42 is connected in sequence with a PID controller, a frequency converter and an electrically controlled valve, the PID controller, the frequency converter, the electrically controlled valve and the pressure sensor constitute a closed-loop negative feedback loop in sequence, the PID controller obtains a PID given value and a PID feedback value, and performs proportional, integral and differential operations according to the difference between the above PID given value and the PID feedback value to adjust the control frequency output to the frequency converter, the frequency converter obtains the above control frequency, and adjusts the opening of the electrically controlled valve according to the above control frequency;

[0025] The barb structure 41 is composed of a barb 411 , a spring 412 and a hydraulically driven door 413 . The barb 411 can be pushed out of the hydraulically driven door 413 by liquid.

[0026] Furthermore, the drag reduction protection mechanism 52 is composed of a steel rope wrapped around an external threaded casing with a smooth inner wall. The threaded anchor pile 54 vertically penetrates the landslide body 9. The top is in an inverted cone shape and is bound by a fixed ring belt 53 with a contact surface. The lower end is provided with threads and welded with a bowl-shaped curved surface. The drag reduction protection mechanism 52 can ensure that the steel rope is only subjected to tension. When the landslide body creeps, it will not bring friction to the steel rope. In theory, the longer the steel rope is, the greater the anti-overturning torque that the threaded anchor pile 54 can provide.

[0027] Furthermore, the rainwater interception and drainage device 61 is installed in the cracks of the landslide body 9, and is composed of a number of arc-shaped concrete prefabricated parts, with pebbles and arc-shaped energy dissipation structures set at the edges, and the outlets at both ends are set above the rainwater collector 62, and the rainwater collector 62 is funnel-shaped. The rainwater interception and drainage device 61 can reduce the amount of rainwater entering the landslide body, enhance the soil's shear resistance, and prevent soil softening.

[0028] Furthermore, the rock and soil impact prevention device 8 comprises a support plate 81, a housing 82, a protective plate 83, a first-level buffer material 84, a second-level buffer material 85, a first-level buffer guide rail 86, a second-level buffer guide rail 87, a first-level slidable structure 88, and a second-level slidable structure 89;

[0029] The support plate 81 is located at the rear of the outer shell 82. The outer shell 82 is provided with 4 to 6 first-level buffer materials 84 inside, and first-level buffer guide rails 86 are provided at the upper and lower ends inside. The first-level sliding structure 88 is located between the first-level buffer guide rails 86. The outer shell 82 is provided with 5 to 8 second-level buffer materials 85 inside, and second-level buffer guide rails 87 are provided at the upper and lower ends inside. The second-level sliding structure 89 is located between the second-level buffer guide rails 87, and a protective plate 83 is installed on the outside. The anti-rock and soil impact device 8 can prevent rock and soil and small landslides from directly impacting the retaining wall and causing cracks in the retaining wall.

[0030] Furthermore, the positioning screws 33, threaded sleeves 52, rainwater collectors 62, and water collection pipes 71 are all made of waterproof and anti-corrosion materials, the piles 11, load plates 12, foundation front walls 21, foundation tooth walls 22, foundation rib beams 23, seepage retaining wall blocks 31, corbels 51, fixing ring belts 53, support plates 81, and outer shells 82 are all made of reinforced concrete materials, and the automated anchors 4 and threaded anchor piles 54 are made of alloy materials wrapped with an anti-corrosion layer.

[0031] A novel retaining wall construction method for inhibiting landslide development mainly comprises the following steps:

[0032] S1. Excavation of foundation pit, setting up formwork in the foundation pit, casting front wall 211, tooth wall 212, rib beam 213 and cross beam 214, and reserving the position of water collection pipeline 71, setting up a tooth wall 212 in parallel every 2 to 3 meters, and lowering wire mesh 215, filter layer 216, top cover 217, cushion layer 22 and foundation platform 23 in sequence;

[0033] S2, setting a template on the side of the composite foundation 21 away from the landslide body 9, pouring high-load anti-slide piles 1 and reserving a position for the water collection pipeline 71;

[0034] S3, the water seepage retaining wall blocks 31 are laid layer by layer. After each layer is laid, the positioning screws 33 and the automatic anchors 4 are installed between the layers. The soil excavated from the foundation pit is used to backfill the soil to the current layer height. After the water seepage retaining wall blocks 31 are laid, the rock and soil impact prevention device 8 is cast and installed on the top thereof;

[0035] S4, installing a water pump unit 72 on the foundation platform 23, digging a water reservoir 73 in an open area, and setting up and connecting a water collection pipeline 71;

[0036] S5, the brackets 51 are cast at equal intervals of 3 to 5 meters horizontally and fixed on the end surface of the upper part of the seepage retaining wall 3 close to the landslide body 9, a fixing ring belt 53 is cast on the top of the landslide body 9, the threaded anchor pile 54 is screwed into the landslide body 9, the bottom is deep under the sliding surface, a mold is set up on the top to cast an inverted cone, and a drag reduction protection mechanism 52 is installed;

[0037] S6. A rainwater interception and drainage device 61 is installed in a crack of 2m to 5m, with its edge extending 5 to 8cm into the landslide body. A rainwater collector 62 is installed at the end, and a rainwater manifold 63 is installed to lead to a water reservoir 73.

[0038] Beneficial effects of the invention:

[0039] (1) The retaining wall blocks are highly matched and fixed to the mountain through a stabilizing mechanism. The retaining wall has the advantages of strong integrity and stability, which can effectively avoid problems such as poor structural strength and high maintenance costs;

[0040] (2) Taking into account the advantages of traditional retaining walls, a composite foundation is designed to prevent the retaining wall from sinking or overturning on soft soil layers, which greatly reduces the amount of masonry work during construction, effectively saving time and investment;

[0041] (3) The retaining wall has a complete drainage system with good drainage effect, eliminating the risk of landslide caused by high water content and reduced shear strength of the rock and soil layer;

[0042] (4) The rock and soil impact prevention device reduces the impact force of rock and soil and small landslides, effectively avoids wall cracking, ensures wall integrity, extends the service life of the retaining wall, and reduces maintenance costs;

[0043] (5) Automated anchoring is automatically installed by the PID control system, simplifying the construction process and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of a new retaining wall structure for suppressing the development of landslides in an embodiment of the present invention.

[0045] Figure 2 Schematic diagram of the high-load anti-sliding pile structure in an embodiment of the present invention.

[0046] Figure 3 It is a schematic diagram of the internal structure of the high-load anti-sliding pile in an embodiment of the present invention.

[0047] Figure 4 It is a schematic diagram of the internal structure of the composite foundation in an embodiment of the present invention.

[0048] Figure 5 It is a schematic diagram of the seepage retaining wall structure in an embodiment of the present invention.

[0049] Figure 6 It is a schematic diagram of the structure of the seepage retaining wall block in an embodiment of the present invention.

[0050] Figure 7 It is a schematic diagram of the automated anchoring structure in an embodiment of the present invention.

[0051] Figure 8 Schematic diagram of the barb structure in an embodiment of the present invention.

[0052] Fig. 9 It is a top view of the threaded anchor pile connection in an embodiment of the present invention.

[0053] Fig.10 It is a cross-sectional view of a rainwater interception and drainage device in an embodiment of the present invention.

[0054] Fig.11 1 is a top view of a rainwater interception and drainage device in an embodiment of the present invention.

[0055] Fig.12It is a schematic diagram of the structure of the rock and soil impact protection device in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings for better understanding of the present invention.

[0057] Example

[0058] In this embodiment, Figure 1 Schematic diagram of a novel retaining wall structure for suppressing landslide development in an embodiment of the present invention, wherein the novel retaining wall for suppressing landslide development comprises a high-load anti-slide pile 1, a composite foundation 21, a cushion layer 22, a foundation platform 23, a water collection tank 24, a water seepage retaining wall 3, an automated anchor 4, a corbel 51, a drag reduction protection mechanism 52, a fixed ring belt 53, a threaded anchor pile 54, a rainwater interception and drainage device 61, a rainwater collector 62, a rainwater manifold 63, a water collection pipeline 71, a water pump unit 72, a water storage tank 73, and a rock and soil impact prevention device 8;

[0059] One side of the composite foundation 21 is connected to the high-load anti-slip pile 1, and the upper part is provided with a cushion layer 22, a foundation platform 23, and a water collecting tank 24. The seepage retaining wall 3 is located on the upper part of the water collecting tank 24, embedded in the landslide body 9 through the automatic anchoring 4, and connected to the threaded anchor pile 54 through the corbel 51 and the drag reduction protection mechanism 52. The top of the threaded anchor pile 54 is provided with a fixed ring belt 53. The end of the rainwater interception and drainage device 61 is provided with a rainwater collector 62, which is connected to the water reservoir 73 through a rainwater manifold 63. One end of the water collecting pipeline 71 is respectively connected to the high-load anti-slip pile 1, the composite foundation 2 and the water collecting tank 33, and the other end is connected to the water reservoir 73 through a water pump unit 72. The anti-rock and soil impact device 8 is installed on the top of the seepage retaining wall 3.

[0060] Figure 2 is a schematic diagram of the high-load anti-sliding pile structure in an embodiment of the present invention, Figure 3 : is a schematic diagram of the internal structure of a high-load anti-slip pile in an embodiment of the present invention, wherein the high-load anti-slip pile 1 is composed of a pile column 11, a load plate 12, and a sandless permeable concrete layer 13; the pile column 11 is a hollow triangular prism, the upper part of which forms an angle of 30 to 50 degrees with the load plate 12, and the lower surface is provided with two layers of permeable holes, the sandless permeable concrete layer 13 is laid outside the permeable holes, and an inclined plate is provided at the bottom to block it. Water in the surrounding soil layer can enter the pile column 11 through the permeable holes and be collected, and then be pumped into the water storage tank 73 through the water collection pipe 71, thereby reducing the moisture content of the soil layer around the pile column 11, enhancing the soil shear resistance, and preventing soil softening.

[0061] Figure 42 is a schematic diagram of the internal structure of the composite foundation in an embodiment of the present invention, wherein the composite foundation 21 is composed of a front wall 211, a tooth wall 212, a rib beam 213, a cross beam 214, a wire mesh 215, an inverted filter layer 216 and a top cover 217; the tooth wall 212 is a load-bearing wall of a stepped structure, with three steps at the bottom, each step having 3 to 5 cross beams 214, and wire mesh 215 and an inverted filter layer 216 laid on the cross beams 214; the tooth wall 212 is provided with a front wall 211 at the front end, a rib beam 213 at the rear end, and a top cover 217 at the top; the tops of the front wall 211 and the rib beam 213 are higher than the top of the tooth wall 212; water in the soil layer can enter the composite foundation 21 through the inverted filter layer 216 and be collected inside, and be pumped into the reservoir 73 through the water collection pipeline 71, thereby reducing the moisture content of the surrounding soil layer, enhancing the soil shear resistance, preventing soil softening, and improving the anti-overturning ability of the composite foundation 21.

[0062] Figure 5 is a schematic diagram of the seepage retaining wall structure in an embodiment of the present invention, Figure 6 3 is a schematic diagram of the seepage retaining wall block structure in an embodiment of the present invention, wherein the seepage retaining wall 3 is composed of a seepage retaining wall block 31, a filling material 32, and a positioning screw 33; a seepage seam 35 is provided on the end face of the seepage retaining wall block 31 close to the landslide body, and the upper and lower end faces are concave-convex contact surfaces and are provided with three groups of positioning screws 33, a group of positioning screws 33 close to the landslide body passes through the flat circular ring of the automatic anchor 4 to fix it, and the filling material 32 is laid in the internal and external gaps of the seepage retaining wall block 31. Water flows through the interior of the retaining wall block 31 under the action of gravity and gathers in the water collecting pool 24, and is pumped into the water storage pool 73 through the water collecting pipeline 71, thereby reducing the moisture content of the soil layer around the retaining wall block 31, enhancing the soil shear resistance, and preventing soil softening.

[0063] Figure 7 is a schematic diagram of an automated anchoring structure in an embodiment of the present invention, Figure 8 It is a schematic diagram of the hook structure in an embodiment of the present invention, the automatic anchor 4 is provided with a hydraulically driven hook structure 41 on the outside, with flat rings and pointed ends at both ends, a pressure sensor is installed inside the pointed end, and the automatic hydraulic inlet 42 is connected with a PID controller, a frequency converter and an electrically controlled valve in sequence, the PID controller, the frequency converter, the electrically controlled valve and the pressure sensor in sequence constitute a closed-loop negative feedback loop, the PID controller obtains the PID given amount and the PID feedback amount, and performs proportional, integral and differential operations according to the difference between the above PID given amount and the PID feedback amount to adjust the control frequency output to the frequency converter, the frequency converter obtains the above control frequency, and adjusts the opening of the electrically controlled valve according to the above control frequency; the hook structure 41 is composed of a hook 411, a spring 412 and a hydraulically driven door 413, and the hook 411 can be pushed out of the hydraulically driven door 413 by the liquid.

[0064] Fig. 9FIG. 1 is a top view of a threaded anchor pile connection according to an embodiment of the present invention. Figure 1 , Fig. 9 As shown, the drag reduction protection mechanism 52 is composed of a steel rope wrapped around an external threaded casing with a smooth inner wall. The threaded anchor pile 54 vertically penetrates the landslide body 9. The top is in an inverted cone shape and is bound by a fixed ring belt 53 with a contact surface. The lower end is provided with threads and welded with a bowl-shaped curved surface. The drag reduction protection mechanism 52 can ensure that the steel rope is only subjected to tension. When the landslide body creeps, it will not bring friction to the steel rope. In theory, the longer the steel rope is, the greater the anti-overturning torque that the threaded anchor pile 54 can provide.

[0065] Fig.10 is a cross-sectional view of a rainwater interception and drainage device according to an embodiment of the present invention, Fig.11 FIG. 1 is a top view of a rainwater interception and drainage device according to an embodiment of the present invention. Figure 1 , Fig.10 and Fig.11 As shown, the rainwater interception and drainage device 61 is installed in the cracks of the landslide body 9, and is composed of a number of arc-shaped concrete prefabricated parts. Pebbles and arc-shaped energy dissipation structures are set at the edges. The outlets at both ends are set above the rainwater collector 62. The rainwater collector 62 is funnel-shaped. The rainwater interception and drainage device 61 can reduce the amount of rainwater entering the landslide body, enhance the soil's shear resistance, and prevent soil softening.

[0066] Fig.12 8 is a schematic diagram of the structure of the rock and soil impact prevention device in an embodiment of the present invention. The rock and soil impact prevention device 8 is composed of a support plate 81, an outer shell 82, a protective plate 83, a first-level buffer material 84, a second-level buffer material 85, a first-level buffer guide rail 86, a second-level buffer guide rail 87, a first-level slidable structure 88, and a second-level slidable structure 89; the support plate 81 is located at the rear of the outer shell 82, 4 to 6 first-level buffer materials 84 are arranged inside the outer shell 82, and first-level buffer guide rails 86 are arranged at the upper and lower ends of the inner shell, the first-level slidable structure 88 is located between the first-level buffer guide rails 86, 5 to 8 second-level buffer materials 85 are arranged inside, and second-level buffer guide rails 87 are arranged at the upper and lower ends of the inner shell, the second-level slidable structure 89 is located between the second-level buffer guide rails 87, and a protective plate 83 is installed on the outside. The rock and soil impact prevention device 8 can prevent rock and soil and small landslides from directly colliding with the retaining wall and causing the retaining wall to crack.

[0067] A novel retaining wall construction method for inhibiting landslide development mainly comprises the following steps:

[0068] S1. Excavation of foundation pit, setting up formwork in the foundation pit, casting front wall 211, tooth wall 212, rib beam 213 and cross beam 214, and reserving the position of water collection pipeline 71, setting up a tooth wall 212 in parallel every 2 to 3 meters, and lowering wire mesh 215, filter layer 216, top cover 217, cushion layer 22 and foundation platform 23 in sequence;

[0069] S2, setting a template on the side of the composite foundation 21 away from the landslide body 9, pouring high-load anti-slide piles 1 and reserving a position for the water collection pipeline 71;

[0070] S3, the water seepage retaining wall blocks 31 are laid layer by layer. After each layer is laid, the positioning screws 33 and the automatic anchors 4 are installed between the layers. The soil excavated from the foundation pit is used to backfill the soil to the current layer height. After the water seepage retaining wall blocks 31 are laid, the rock and soil impact prevention device 8 is cast and installed on the top thereof;

[0071] S4, installing a water pump unit 72 on the foundation platform 23, digging a water reservoir 73 in an open area, and setting up and connecting a water collection pipeline 71;

[0072] S5, the brackets 51 are cast at equal intervals of 3 to 5 meters horizontally and fixed on the end surface of the upper part of the seepage retaining wall 3 close to the landslide body 9, a fixing ring belt 53 is cast on the top of the landslide body 9, the threaded anchor pile 54 is screwed into the landslide body 9, the bottom is deep under the sliding surface, a mold is set up on the top to cast an inverted cone, and a drag reduction protection mechanism 52 is installed;

[0073] S6. A rainwater interception and drainage device 61 is installed in a crack of 2m to 5m, with its edge extending 5 to 8cm into the landslide body. A rainwater collector 62 is installed at the end, and a rainwater manifold 63 is installed to lead to a water reservoir 73.

[0074] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A new type of retaining wall for inhibiting the development of landslides, characterized by: It comprises a high-load anti-sliding pile (1), a composite foundation (21), a cushion layer (22), a foundation platform (23), a water collection tank (24), a water seepage retaining wall (3), an automatic anchor (4), a bracket (51), a drag reduction protection mechanism (52), a fixed ring belt (53), a threaded anchor pile (54), a rainwater interception and drainage device (61), a rainwater collector (62), a rainwater manifold (63), a water collection pipeline (71), a water pump unit (72), a water storage tank (73), and a rock and soil impact prevention device (8); One side of the composite foundation (21) is connected to the high-load anti-sliding pile (1), and the upper part is provided with a cushion layer (22), a foundation platform (23), and a water collection tank (24). The seepage retaining wall (3) is located on the upper part of the water collection tank (24), embedded in the landslide body (9) through the automatic anchoring (4), and connected to the threaded anchor pile (54) through the bracket (51) and the drag reduction protection mechanism (52). The top of the threaded anchor pile (54) is provided with a fixed ring belt (53). The end of the rainwater interception and drainage device (61) is provided with a rainwater collector (62), which is connected to the water storage tank (73) through a rainwater manifold (63). One end of the water collection pipeline (71) is respectively connected to the high-load anti-sliding pile (1), the composite foundation (21) and the water collection tank (24), and the other end is connected to the water storage tank (73) through a water pump unit (72). The rock and soil impact prevention device (8) is installed on the top of the seepage retaining wall (3); The high-load anti-sliding pile (1) is composed of a pile column (11), a load plate (12), and a sand-free water-permeable concrete layer (13). The pile column (11) is a hollow triangular prism, the upper part of which forms an angle of 30 to 50 degrees with the load plate (12), and the lower surface is provided with two layers of water-permeable holes. The sand-free water-permeable concrete layer (13) is laid outside the water-permeable holes, and the bottom end is provided with an inclined plate for blocking. The composite foundation (21) is composed of a front wall (211), a tooth wall (212), a rib beam (213), a cross beam (214), a wire mesh (215), an anti-filter layer (216) and a top cover (217); the tooth wall (212) is a load-bearing wall with a stepped structure, with three steps at the bottom, each step having 3 to 5 cross beams (214), and the wire mesh (215) and the anti-filter layer (216) are laid on the cross beams (214); the tooth wall (212) is provided with a front wall (211) at the front end, a rib beam (213) at the rear end, and a top cover (217) at the top end; the tops of the front wall (211) and the rib beam (213) are higher than the top of the tooth wall (212); The seepage retaining wall (3) is composed of a seepage retaining wall block (31), a filling material (32), and positioning screws (33). The end surface of the seepage retaining wall block (31) close to the landslide body is provided with a seepage seam (35). The upper and lower end surfaces are concave-convex contact surfaces and are provided with three groups of positioning screws (33). A group of positioning screws (33) close to the landslide body passes through the flat circular ring of the automatic anchor (4) to fix it. The filling material (32) is laid in the internal and external gaps of the seepage retaining wall block (31).

2. A new retaining wall for suppressing landslide development according to claim 1, characterized in that: The automatic anchor (4) is provided with a hydraulically driven barb structure (41) on the outside, one end of which is an oblate ring and the other end is designed with a sharp tip, and a pressure sensor is installed inside the sharp tip. The automatic hydraulic inlet (42) is connected in sequence with a PID controller, a frequency converter and an electrically controlled valve. The PID controller, the frequency converter, the electrically controlled valve and the pressure sensor constitute a closed-loop negative feedback loop in sequence. The PID controller obtains a PID given amount and a PID feedback amount, and performs proportional, integral and differential operations according to the difference between the above PID given amount and the PID feedback amount to adjust the control frequency output to the frequency converter. The frequency converter obtains the above control frequency and adjusts the opening of the electrically controlled valve according to the above control frequency. The barb structure (41) is composed of a barb (411), a spring (412) and a hydraulically driven door (413), and the barb (411) can be pushed out of the hydraulically driven door (413) by liquid.

3. A new retaining wall for suppressing landslide development according to claim 1, characterized in that: The drag reduction protection mechanism (52) is composed of a steel rope wrapped around an external threaded casing with a smooth inner wall. The threaded anchor pile (54) vertically penetrates the landslide body (9). The top is in an inverted cone shape and is bound by a fixed ring belt (53) with a contact surface. The lower end is provided with threads and welded with a bowl-shaped curved surface.

4. A new retaining wall for suppressing landslide development according to claim 1, characterized in that: The rainwater interception and drainage device (61) is installed in the cracks of the landslide body (9), and is composed of a number of arc-shaped concrete prefabricated parts. Pebbles and arc-shaped energy dissipation structures are arranged at the edges. The water outlets at both ends are set above the rainwater collector (62), and the rainwater collector (62) is funnel-shaped.

5. A new retaining wall for suppressing landslide development according to claim 1, characterized in that: The rock and soil impact prevention device (8) is composed of a support plate (81), a shell (82), a protective plate (83), a first-stage buffer material (84), a second-stage buffer material (85), a first-stage buffer guide rail (86), a second-stage buffer guide rail (87), a first-stage slidable structure (88), and a second-stage slidable structure (89); The support plate (81) is located at the rear of the outer shell (82), 4 to 6 first-level buffer materials (84) are arranged inside the outer shell (82), and first-level buffer guide rails (86) are arranged at the upper and lower ends of the inner shell, the first-level slidable structure (88) is located between the first-level buffer guide rails (86), 5 to 8 second-level buffer materials (85) are arranged inside, and second-level buffer guide rails (87) are arranged at the upper and lower ends of the inner shell, the second-level slidable structure (89) is located between the second-level buffer guide rails (87), and a protective plate (83) is installed outside, and the support plate (81) and the outer shell (82) are both made of reinforced concrete materials.

6. A new retaining wall for suppressing landslide development according to claim 1, characterized in that: The positioning screws (33), rainwater collectors (62), and water collection pipes (71) are all made of waterproof and anti-corrosion materials; the piles (11), load plates (12), front walls (211), tooth walls (212), rib beams (213), seepage retaining wall blocks (31), corbels (51), and fixed ring belts (53) are all made of reinforced concrete materials; the automated anchors (4) and threaded anchor piles (54) are made of alloy materials wrapped with an anti-corrosion layer.

7. A construction method for a new retaining wall for suppressing landslide development according to claim 1, wherein the main steps are: S1. Excavation of the foundation pit, setting up formwork in the foundation pit, casting the front wall (211) at the front end of the composite foundation (21), the tooth wall (212) with a stepped structure in the middle end, the rib beam (213) at the rear end and the cross beam (214) installed on the tooth wall (212), and reserving a position for the water collection pipeline (71). A tooth wall (212) is set up in parallel every 2 to 3 meters, and a wire mesh (215), a filter layer (216), a top cover (217), a cushion layer (22) and a foundation platform (23) are sequentially placed; S2, setting a formwork on the side of the composite foundation (21) away from the landslide body (9), pouring high-load anti-slide piles (1) and reserving a position for a water collection pipeline (71); S3, the seepage retaining wall blocks (31) are laid layer by layer. After each layer is laid, the positioning screws (33) and the automatic anchors (4) between the layers are installed, and the soil excavated from the foundation pit is used to backfill to the current layer height. After the seepage retaining wall blocks (31) are laid, a rock and soil impact prevention device (8) is cast and installed on the top thereof; S4, installing a water pump unit (72) on the foundation platform (23), digging a water reservoir (73) in an open area, and setting up and connecting a water collection pipeline (71); S5, the brackets (51) are cast horizontally at equal intervals of 3 to 5 meters and fixed on the end surface of the upper part of the seepage retaining wall (3) close to the landslide body (9), a fixing ring belt (53) is cast on the top of the landslide body (9), a threaded anchor pile (54) is screwed into the landslide body (9), the bottom is deeply below the sliding surface, a mold is set up on the top to cast an inverted cone, and a drag reduction protection mechanism (52) is installed; S6. A rainwater interception and drainage device (61) is installed in a crack of 2m to 5m, with its edge extending 5 to 8cm into the landslide body. A rainwater collector (62) is installed at the end, and a rainwater manifold (63) is installed to lead to a water storage tank (73).

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