Highway slope structure and construction methods in high water level areas

Abstract

This invention discloses a highway slope structure and its construction method in high-water-level areas, solving the technical problems of poor reinforcement and drainage effects in existing technologies. The highway slope structure in high-water-level areas includes: a concrete grid with cavities and drainage channels; a first flexible grid laid on the subgrade; a porous water-conducting layer laid on the first flexible grid; a second flexible grid laid on the porous water-conducting layer; the concrete grid laid on the second flexible grid; an elastic water-conducting layer laid on the second flexible grid and filling the cavities; a filter layer laid on the elastic water-conducting layer; a water-blocking layer disposed above the filter layer, forming a water storage cavity between the water-blocking layer and the filter layer; a drainage mechanism for discharging the filtered liquid from the water storage cavity into the drainage channel; and a fixing mechanism for fixing the concrete grid to the subgrade.

Description

Technical Field

[0001] This invention relates to the technical field of highway slopes in high-water-level areas, and more specifically, to highway slope structures and construction methods in high-water-level areas. Background Technology

[0002] Generally, areas with an average annual groundwater level exceeding 2 meters, or areas where groundwater levels exhibit significant seasonal variations due to factors such as tides and seasonal rainfall, can be classified as high-water areas. High water levels can significantly impact the stability of highway subgrades and slopes, increasing the risk of landslides, erosion, and other hazards. For example, increased seepage pressure can lead to subgrade settlement and pipeline damage; drainage difficulties and severe surface water accumulation affect road surface use and driving safety. Therefore, high-water areas require special measures in subgrade design and slope protection to ensure the long-term safety and stability of highway infrastructure.

[0003] Existing slope structures in high-water-level areas typically employ precast concrete blocks directly assembled into a mesh on the soil surface, forming cavities and drainage channels, which are then filled with vegetation or gravel. In this conventional slope structure, the precast concrete blocks and the vegetation or gravel filling are ineffective in preventing soil sliding and erosion, thus lacking reinforcement measures for the soil foundation itself and failing to reduce landslide risk. For drainage, drainage pipes are usually buried inside the soil to draw out accumulated water. However, these buried pipes are easily clogged by silt, resulting in poor drainage. Furthermore, relying solely on internal drainage pipes cannot effectively control seepage pressure within the slope, further exacerbating the landslide risk. Therefore, slope design in high-water-level areas cannot simply rely on traditional precast concrete block laying methods; it requires fundamentally addressing drainage and reinforcement issues through more systematic and comprehensive measures. Summary of the Invention

[0004] The main objective of this invention is to provide a highway slope structure and its construction method in high-water-level areas, so as to solve the technical problems of poor reinforcement and drainage effects in the prior art.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a highway slope structure for high-water-level areas is provided, the technical solution of which is as follows:

[0006] A highway slope structure in a high-water-level area includes a concrete grid having cavities formed by splicing precast concrete blocks and drainage channels; the slope structure also includes:

[0007] The first flexible grid is laid on the soil base;

[0008] A porous water-conducting layer is laid on the first flexible grid, and the porous water-conducting layer is formed by the accumulation of particles.

[0009] The second flexible mesh is laid on the porous water-conducting layer; the concrete mesh is laid on the second flexible mesh;

[0010] An elastic water-conducting layer is laid on a second flexible grid and filled within the cavity of the concrete grid.

[0011] A filter layer, which is laid on an elastic water-conducting layer;

[0012] A water-blocking layer is disposed above the filter layer, and a water storage cavity is formed between the water-blocking layer and the filter layer;

[0013] A drainage mechanism is used to discharge the clear liquid filtered through the filter layer from the water storage chamber into the drainage ditch of the concrete grid.

[0014] A fixing mechanism for fixing a concrete grid to a subgrade, the fixing mechanism comprising a grouting pipe that passes through a precast concrete block, a first flexible grid, a porous water-conducting layer, and a second flexible grid and extends into the subgrade.

[0015] As a further improvement to the highway slope structure in the aforementioned high-water-level areas: the first flexible mesh, the second flexible mesh, and the filter layer are all metal screens with a thickness of 2-5 mm. The mesh count of the first flexible mesh is 2-5 mesh, the mesh count of the second flexible mesh is 6-12 mesh, and the mesh count of the filter layer is 14-28 mesh.

[0016] As a further improvement to the highway slope structure in the aforementioned high-water-level areas: the porous water-conducting layer has a thickness of 5-10 cm and is composed of sand and gravel with a particle size of 1-3 cm.

[0017] As a further improvement to the highway slope structure in the high water level area mentioned above: the elastic water-conducting layer is made of interwoven fibers, and its thickness in its natural state is 1-5 cm greater than the distance between the filter layer and the second flexible mesh. In its natural state, the outer edge extends 1-5 cm beyond the inner wall of the cavity of the concrete mesh.

[0018] As a further improvement to the highway slope structure in the aforementioned high-water-level areas: the elastic water-conducting layer is any one of glass fiber felt, basalt fiber felt, aramid fiber felt, carbon fiber felt, ceramic fiber felt, and polyimide fiber felt.

[0019] As a further improvement to the highway slope structure in the high water level area mentioned above: the water-blocking layer has a flange that fits the inner wall of the cavity of the concrete grid, and the flange is welded to the filter layer; the outer edge of the water-blocking layer is provided with through holes, and the precast concrete block is provided with bolt assemblies that fit the through holes.

[0020] As a further improvement to the highway slope structure in the aforementioned high water level area: the drainage mechanism includes a drainage outlet located on the water-blocking layer and a drainage pipe connected to the drainage outlet. The drainage pipe is equipped with a one-way valve, and the outlet of the drainage pipe faces the drainage ditch of the concrete grid. The drainage mechanism includes multiple sets of drainage outlets and drainage pipes arranged at intervals.

[0021] As a further improvement to the highway slope structure in the high water level area mentioned above: the fixing mechanism includes grouting pipes arranged at intervals, and the top of the grouting pipes is fastened with nuts after passing through the concrete grid.

[0022] As a further improvement to the highway slope structure in the high water level area mentioned above: the fixing mechanism also includes a sleeve welded to the second flexible grid and the grouting pipe, and the bottom of the concrete grid is provided with a groove that fits the sleeve.

[0023] To achieve the above objectives, according to a second aspect of the present invention, a construction method for highway slope structures in high-water-level areas is provided, the technical solution of which is as follows:

[0024] The construction method for highway slope structures in high-water-level areas described in the first aspect above includes the following steps:

[0025] The first flexible grid is laid on the soil base, and then the soil is compacted;

[0026] Particles are spread and compacted on the first flexible grid to form a porous water-conducting layer;

[0027] A second flexible mesh is laid on the porous water-conducting layer, and the second flexible mesh is pre-fixed around its perimeter using pins.

[0028] Drill holes, then insert grouting pipes and weld them to the second flexible mesh for fixation, and then grout.

[0029] The construction is completed by sequentially laying a concrete grid, an elastic water-conducting layer, a filter layer, and a water-blocking layer.

[0030] It is evident that the highway slope structure and construction method for high-water-level areas of the present invention have the following advantages:

[0031] First, each structural layer in the slope structure has a special function, specifically: (1) The first flexible grid serves as the bottom support structure, providing a flat and flexible support foundation for the upper porous water-conducting layer and other materials, enhancing the stability of the soil foundation, reducing the settlement or displacement of materials, and preventing the soil from shifting when other layers are laid. (2) The porous water-conducting layer is composed of granular materials (such as gravel) to form a permeable layer, effectively guiding and draining accumulated water, reducing soil moisture, and reducing water erosion of the soil. (3) The second flexible grid provides additional support for the upper concrete grid and other materials on the one hand, further enhancing the stability of the slope structure, and on the other hand, isolates the porous water-conducting layer from the upper concrete grid and other materials, preventing the upper materials from mixing into the lower porous water-conducting layer, and ensuring that water is smoothly discharged from the porous water-conducting layer. (4) The concrete grid is composed of precast concrete blocks spliced ​​together to form a robust grid structure to provide structural strength and stability, as well as to form drainage ditches to guide accumulated water out and prevent soil erosion. (5) The elastic water-conducting layer is made of interwoven fiber materials, which has good elasticity and permeability. It fills the cavity of the concrete grid and can provide additional water guiding capacity, further improving drainage performance. (6) The filter layer is located above the elastic water-conducting layer. It can filter water and prevent soil particles from entering the drainage system, ensuring smooth water flow and long-lasting drainage effect. (7) The water-blocking layer isolates water from other structural layers and forms a water storage cavity for storing and regulating water pressure. The accumulated water is discharged through the drain pipe. (8) The drainage mechanism includes a drain outlet and a drain pipe. By setting a one-way valve to prevent water backflow, the filtered clear liquid is introduced into the drainage ditch of the concrete grid to remove water from the water storage cavity and keep the slope structure dry. (9) The grouting pipe in the fixing mechanism can firmly fix the concrete grid to the soil foundation, ensuring the stability of the concrete grid on the soil foundation and preventing displacement or detachment during use.

[0032] Secondly, the design and function of each structural layer in the slope structure complement each other, jointly ensuring the stability and drainage effect of the highway slope in high water level areas, and improving the overall durability and safety of the structure. Specifically: (1) Layered structure design: The design adopts a multi-layer composite material design, including flexible grid, porous water-conducting layer, elastic water-conducting layer, etc. Each layer of material plays a different function, such as drainage, filtration, seepage prevention, etc., to ensure the durability and stability of drainage and extend the service life of the slope. (2) High-efficiency drainage design: Through porous water-conducting layer, elastic water-conducting layer, etc., seepage water can be discharged quickly and effectively, preventing the slope from landslide or structural instability due to increased water pressure; in conjunction with the drainage mechanism design, layered and graded drainage is realized to improve drainage efficiency; the water storage cavity design can effectively disperse water pressure and reduce the destructive force on the slope structure. (3) Slope reinforcement and stabilization design: The design of grouting pipes and fixing mechanisms can firmly fix the entire slope structure to the soil foundation; through multi-point fixing of grouting pipes, the stability of concrete grids and flexible grids on the soil foundation is ensured, and the stability of the overall structure is increased; the design of elastic water-conducting layer can absorb slope deformation to a certain extent and improve overall stability; through the combination of flexible grids and concrete grids, the anti-sliding performance of the slope structure is enhanced, which not only ensures the flexibility of the slope structure, but also provides strong support capacity, suitable for complex terrain and high water level environment. (4) Filtration and seepage prevention composite design: The design of water-blocking layer can block external water from entering and reduce seepage pressure; the design of filter layer can effectively filter impurities and ensure smooth drainage; the one-way valve design in drainage mechanism ensures the one-way flow of water and avoids backflow. (5) Simple construction: The splicing and laying of precast concrete blocks and multi-layer grids makes the construction process simple and flexible, reduces the complexity and construction difficulty of slope engineering, and is conducive to on-site construction management.

[0033] In summary, the design concept of this layered composite structure is novel, fully considers the characteristics of slopes in high-water-level areas, and achieves a systematic solution to the problems of reinforcement and drainage from multiple aspects such as drainage, reinforcement, and seepage prevention. Moreover, the structure is simple, low-cost, and easy to construct, and has strong practicality.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] The accompanying drawings, which form part of this invention, are used to aid in understanding the invention. The content provided in the drawings and their related descriptions can be used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1This is a side view of an embodiment of the highway slope structure in high-water-level areas according to the present invention.

[0037] Figure 2 This is a partial schematic diagram of an embodiment of the highway slope structure in high-water-level areas according to the present invention.

[0038] Figure 3 This is a front view of an embodiment of the highway slope structure in high-water-level areas according to the present invention.

[0039] The relevant markings in the above figures are:

[0040] 110-Precast concrete block, 120-Cavity, 130-Drainage ditch, 140-Bolt assembly, 200-First flexible mesh, 300-Porous water-conducting layer, 400-Second flexible mesh, 500-Elastic water-conducting layer, 600-Filter layer, 610-Water storage cavity, 700-Water-blocking layer, 710-Flange, 810-Drain outlet, 820-Drainage pipe, 830-One-way valve, 910-Grouting pipe, 920-Sleeve. Detailed Implementation

[0041] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0042] The technical solutions and features provided in the various parts of this invention, including the following description, can be combined with each other without conflict.

[0043] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0044] Regarding the terminology and units used in this invention: The terms "comprising," "having," and any variations thereof in the specification, claims, and related parts of this invention are intended to cover non-exclusive inclusion.

[0045] Figure 1 This is a side view of an embodiment of the highway slope structure in high-water-level areas according to the present invention. Figure 2 This is a partial schematic diagram of an embodiment of the highway slope structure in high-water-level areas according to the present invention. Figure 3 This is a front view of an embodiment of the highway slope structure in high-water-level areas according to the present invention.

[0046] like Figure 1-3As shown, the highway slope structure in high water level areas includes a concrete grid, a first flexible grid 200, a porous water-conducting layer 300, a second flexible grid 400, an elastic water-conducting layer 500, a filter layer 600, a water-blocking layer 700, a drainage mechanism, and a fixing mechanism.

[0047] The concrete grid has cavities 120 and drainage channels 130 formed by splicing precast concrete blocks 110. The precast concrete blocks 110 come in two shapes: U-shaped and slab-shaped, allowing for rapid assembly into the concrete grid. Preferably, adjacent precast concrete blocks 110 have mating steps or slots, which not only improves construction efficiency but also enhances the overall strength of the concrete grid.

[0048] The first flexible grid 200 is laid on the soil base; the porous water-conducting layer 300 is laid on the first flexible grid 200, and the porous water-conducting layer 300 is composed of granular material; the second flexible grid 400 is laid on the porous water-conducting layer 300; and the concrete grid is laid on the second flexible grid 400. The first flexible grid 200 and the second flexible grid 400 maintain the stability of the slope structure through layered support and isolation, while the porous water-conducting layer 300 ensures efficient drainage and reduces the potential harm of water to the soil and slope structure. Therefore, the combination of the first flexible grid 200, the porous water-conducting layer 300, and the second flexible grid 400 effectively manages and removes water while enhancing the overall stability of the slope.

[0049] Preferably, the porous drainage layer 300 has a thickness of 5–10 cm. This thickness provides sufficient space and drainage capacity, allowing water to quickly flow through the gravel layer into the upper drainage system, reducing the possibility of water accumulation. Simultaneously, this thickness also provides sufficient support to prevent the gravel layer from settling or deforming during use, ensuring long-term effective drainage. Preferably, the porous drainage layer 300 is composed of gravel with a particle size of 1–3 cm. By controlling the packing density, an average pore size of approximately 1–3 cm can be formed. This porous drainage layer 300 has high permeability and, compared to fine sand or clay, can more effectively guide and drain water, preventing water retention on slopes. Furthermore, this porous drainage layer 300 reduces the problem of clogging by fine particles, maintaining the unobstructed flow of the drainage layer and preventing a decline in drainage performance due to fine particle blockage.

[0050] The elastic water-guiding layer 500 is laid on the second flexible mesh 400 and fills the cavity 120 of the concrete mesh. The elastic water-guiding layer 500 is made of interwoven fibers, and its thickness in its natural state is 1-5 cm greater than the distance between the filter layer 600 and the second flexible mesh 400. Its outer edge in its natural state extends 1-5 cm beyond the inner wall of the cavity 120 of the concrete mesh, allowing it to fit tightly against the cavity 120 after installation and preventing the elastic water-guiding layer 500 from swaying under water pressure. Preferably, the elastic water-guiding layer 500 is any one of glass fiber felt, basalt fiber felt, aramid fiber felt, carbon fiber felt, ceramic fiber felt, or polyimide fiber felt. These fiber materials all have excellent corrosion resistance, durability, and compressive strength, adapting to long-term erosion in aquatic environments and extending the service life of the overall structure. The average pore size of the elastic water-guiding layer 500 is preferably 0.5-1 cm, allowing for more precise water guidance and suitable elasticity.

[0051] The filter layer 600 is laid on the elastic water-conducting layer 500. Preferably, the first flexible mesh 200, the second flexible mesh 400, and the filter layer 600 are all metal screens with a thickness of 2-5 mm. The first flexible mesh 200 has a mesh count of 2-5 (pore size of 4-8 mm), the second flexible mesh 400 has a mesh count of 6-12 (pore size of 1.4-3.35 mm), and the filter layer 600 has a mesh count of 14-28 (pore size of 0.6-1.18 mm). Thus, the mesh count of the second flexible mesh 400 and the filter layer 600 increases step by step, and the corresponding pore size decreases step by step. This can intercept particulate matter step by step, maintain the stability of the soil foundation, and reduce water flow pressure.

[0052] The water-blocking layer 700 is disposed above the filter layer 600, and a water storage cavity 610 is formed between the water-blocking layer 700 and the filter layer 600. The water-blocking layer 700 has a flange 710 that is adapted to the inner wall of the cavity 120 of the concrete grid. The flange 710 is welded to the filter layer 600, thereby increasing the strength, improving the sealing performance, and making the filter layer 600 less prone to damage. The outer edge of the water-blocking layer 700 is provided with a through hole, and the precast concrete block 110 is provided with a bolt assembly 140 adapted to the through hole (pre-set on the precast concrete block 110), thereby facilitating disassembly and assembly.

[0053] The drainage mechanism is used to discharge the clear liquid filtered by the filter layer 600 into the drainage ditch 130 of the concrete grid in the water storage chamber 610; the drainage mechanism includes a drain outlet 810 provided on the water blocking layer 700 and a drain pipe 820 connected to the drain outlet 810, the drain pipe 820 is provided with a one-way valve 830, and the outlet of the drain pipe 820 faces the drainage ditch 130 of the concrete grid; the drainage mechanism includes multiple sets of drain outlets 810 and drain pipes 820 arranged at intervals.

[0054] The fixing mechanism is used to fix the concrete grid to the soil foundation. The fixing mechanism includes a grouting pipe 910 that passes through the precast concrete block 110, the first flexible grid 200, the porous water-conducting layer 300, and the second flexible grid 400 and extends into the soil foundation. Preferably, the fixing mechanism includes grouting pipes 910 arranged at intervals (set according to the size, shape, number, and splicing method of the precast concrete block 110). The top of the grouting pipe 910 passes through the concrete grid and is fastened with a nut, which provides a good reinforcement effect. The fixing mechanism also includes a sleeve 920 welded to the second flexible grid 400 and the grouting pipe 910. The bottom of the concrete grid is provided with a groove that matches the sleeve 920 (pre-set on the precast concrete block 110), which can further improve the structural stability.

[0055] The above-mentioned construction method for highway slope structures in high-water-level areas includes the following steps:

[0056] The first flexible grid 200 is laid on the soil base, and then the soil is compacted;

[0057] Particles are spread and compacted on the first flexible grid 200 to form a porous water-conducting layer 300;

[0058] A second flexible grid 400 is laid on the porous water-conducting layer 300, and pins are used to pre-fix the second flexible grid 400 around its perimeter to facilitate drilling.

[0059] Drill holes, then insert grouting pipes 910 into the holes and weld them to the second flexible mesh 400 for fixation. Grout is then injected into the soil foundation through the grouting pipes 910. After the grout solidifies, it can reinforce the soil foundation. The grout is a two-component modified epoxy polymer.

[0060] The construction is completed by sequentially laying a concrete grid, an elastic water-conducting layer of 500mm, a filter layer of 600mm, and a water-blocking layer of 700mm.

[0061] In actual construction, the first flexible mesh 200 and the second flexible mesh 400 can be formed by overlapping smaller-sized metal screens, with the overlap width preferably being 2 to 5 cm.

[0062] Samples were prepared using various soil materials commonly found in high-water-level areas and the aforementioned slope structure. The permeability of the samples was tested according to the "Standard for Geotechnical Testing Methods" (GB / T 50123-2019). The results showed that the permeability coefficients kpermeability of the samples at standard temperature (20℃) under both constant head and variable head conditions were [data missing]. 20 All ≥2.3×10 -3cm / s. The slope stability coefficient Fs under general working conditions is calculated to be ≥1.5 and the slope stability coefficient under seismic working conditions is ≥1.3 by the limit equilibrium method, which meets the requirements of the "Technical Specification for Building Slope Engineering" (GB50330-2013).

[0063] The foregoing has described the relevant content of the present invention. Those skilled in the art will be able to implement the present invention based on these descriptions. All other embodiments obtained by those skilled in the art based on the above description of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A highway slope structure in a high-water-level area, comprising a concrete grid having cavities (120) formed by splicing precast concrete blocks (110) and drainage channels (130); characterized in that: Slope structures also include: The first flexible grid (200) is laid on the soil base; A porous water-conducting layer (300) is laid on the first flexible grid (200), and the porous water-conducting layer (300) is formed by the accumulation of particles; A second flexible mesh (400) is laid on a porous water-conducting layer (300); the concrete mesh is laid on the second flexible mesh (400); An elastic water-conducting layer (500) is laid on a second flexible grid (400) and filled in the cavity (120) of the concrete grid; A filter layer (600) is laid on an elastic water-conducting layer (500); A water-blocking layer (700) is disposed above a filter layer (600), and a water storage cavity (610) is formed between the water-blocking layer (700) and the filter layer (600); the water-blocking layer (700) has a flange (710) adapted to the inner wall of the cavity (120) of the concrete grid, and the flange (710) is welded to the filter layer (600); a through hole is provided on the outer edge of the water-blocking layer (700), and a bolt assembly (140) adapted to the through hole is provided on the precast concrete block (110); A drainage mechanism is provided to discharge the clear liquid filtered by the filter layer (600) in the water storage chamber (610) into the drainage ditch (130) of the concrete grid; the drainage mechanism includes a drain outlet (810) provided on the water-blocking layer (700) and a drain pipe (820) connected to the drain outlet (810), the drain pipe (820) is provided with a one-way valve (830), and the outlet of the drain pipe (820) faces the drainage ditch (130) of the concrete grid; the drainage mechanism includes multiple sets of drain outlets (810) and drain pipes (820) arranged at intervals; A fixing mechanism for fixing a concrete grid to a subgrade, the fixing mechanism comprising a grouting pipe (910) that passes through a precast concrete block (110), a first flexible grid (200), a porous water-conducting layer (300), and a second flexible grid (400) and extends into the subgrade.

2. The highway slope structure in high-water-level areas as described in claim 1, characterized in that: The first flexible mesh (200), the second flexible mesh (400) and the filter layer (600) are all metal screens with a thickness of 2 to 5 mm. The first flexible mesh (200) has a mesh count of 2 to 5, the second flexible mesh (400) has a mesh count of 6 to 12, and the filter layer (600) has a mesh count of 14 to 28.

3. The highway slope structure in high-water-level areas as described in claim 1, characterized in that: The porous water-conducting layer (300) has a thickness of 5 to 10 cm and is composed of sand and gravel with a particle size of 1 to 3 cm.

4. The highway slope structure in high-water-level areas as described in claim 1, characterized in that: The elastic water-conducting layer (500) is made of interwoven fibers. Its thickness in its natural state is 1-5 cm greater than the distance between the filter layer (600) and the second flexible mesh (400). Its outer edge in its natural state extends 1-5 cm beyond the inner wall of the cavity (120) of the concrete mesh.

5. The highway slope structure in high-water-level areas as described in claim 4, characterized in that: The elastic water-conducting layer (500) is any one of glass fiber felt, basalt fiber felt, aramid fiber felt, carbon fiber felt, ceramic fiber felt, and polyimide fiber felt.

6. The highway slope structure in high-water-level areas as described in claim 1, characterized in that: The fixing mechanism includes grouting pipes (910) arranged at intervals, the tops of which are fastened with nuts after passing through the concrete grid.

7. The highway slope structure in high-water-level areas as described in claim 6, characterized in that: The fixing mechanism also includes a sleeve (920) welded to the second flexible grid (400) and the grouting pipe (910), and the bottom of the concrete grid is provided with a groove that fits the sleeve (920).

8. The construction method for highway slope structures in high-water-level areas as described in any one of claims 1-7, characterized in that: Includes the following steps: The first flexible grid (200) is laid on the subgrade, and then the soil is compacted; Particles are spread and compacted on the first flexible grid (200) to form a porous water-conducting layer (300); A second flexible mesh (400) is laid on the porous water-conducting layer (300), and the second flexible mesh (400) is pre-fixed around its perimeter using pins; Drill holes, then insert grouting pipes (910) and weld them to the second flexible mesh (400), then grout. The construction is completed by sequentially laying the concrete grid, the elastic water-conducting layer (500), the filter layer (600), and the water-blocking layer (700).

Images