Retaining wall and method of construction thereof

Abstract

This invention relates to a retaining wall and its construction method. The retaining wall includes a concrete platform foundation slab, telescopic steel rods, the wall body, polypropylene panels, and a buffer layer. The upper and right sides of the polypropylene panels have outwardly protruding bosses, and the lower and left sides have inwardly recessed grooves. Adjacent polypropylene panels are joined together via these bosses and grooves. Drainage channels extending perpendicular to the surface of the polypropylene panels are also provided on the upper, lower, left, and right sides. Multiple perforations perpendicular to the surface of the polypropylene panels are provided. Each polypropylene panel has a through-hole extending vertically through itself, allowing it to be strung together with the telescopic steel rods. The buffer layer is formed by grouting a permeable polymer material to buffer the soil. It is lightweight, easy to assemble and disassemble, reusable, impact-resistant, has good drainage, and a wide range of applications, serving as both temporary and permanent supports for emergency rescue and other situations.

Description

Technical Field

[0001] This invention relates to a retaining wall and its construction method. Background Technology

[0002] Retaining walls are needed to stabilize and support the soil structure during construction of slopes, foundation pits, etc.

[0003] Traditional retaining walls are mainly made of reinforced concrete, stone and other materials. These retaining walls are inconvenient to transport and construct, time-consuming and labor-intensive, and are not easy to disassemble and move after use, so they are generally for one-time use.

[0004] In addition, rainwater can cause a lot of water to accumulate on the back of the retaining wall. This water not only increases the pressure on the retaining wall, but also damages the soil behind the retaining wall and causes accidents such as landslides. Therefore, concrete retaining walls generally need to be equipped with drainage pipes at the bottom for drainage. However, landslides may cause the drainage outlets to be blocked, and too many drainage pipes will affect the strength of the retaining wall, while too few will lead to slow drainage. Drainage problems are a major headache for designers.

[0005] Furthermore, the soil behind the retaining wall often slides due to various reasons, which can easily impact the retaining wall. Concrete retaining walls are relatively brittle and are easily damaged when subjected to impact, affecting their normal support to the soil.

[0006] Therefore, there is an urgent need for a retaining wall technology that is lightweight, easy to assemble and disassemble, reusable, can effectively solve drainage problems, and has strong impact resistance. Summary of the Invention

[0007] The purpose of this invention is to provide a lightweight, easy-to-assemble and disassemble, reusable, effective drainage solution and impact-resistant retaining wall and its construction method. It can be used as a temporary retaining structure for emergency rescue and other projects, and can also be used as a permanent retaining structure.

[0008] The technical solution of the retaining wall of the present invention is as follows: The retaining wall includes:

[0009] The concrete platform foundation slab has at least two rows of parallel bolt holes.

[0010] Multiple telescopic steel rods of adjustable length are fixed to one of the bolt holes in the row of bolts. The telescopic steel rods are perpendicular to the concrete platform foundation slab.

[0011] The wall has multiple layers, each layer is made up of multiple rectangular polypropylene panels. The surface of the polypropylene panels has a wave-shaped structure formed by regular concave and convex shapes. Adjacent polypropylene panels rely on the crests and troughs of the waves to fit together.

[0012] The polypropylene (PP) plate has protruding bosses on its upper and right sides, and recessed grooves on its lower and left sides. Adjacent PP plates are joined together by these bosses and grooves. Drainage grooves extending perpendicular to the surface of the PP plate are also provided on its upper, lower, left, and right sides. When adjacent PP plates are joined, the drainage grooves on their mating sides form a first drainage channel. Multiple through-holes perpendicular to the surface of the PP plate form a second drainage channel. The PP plate has through-holes extending vertically through itself, allowing it to be strung onto a telescopic steel rod. Threaded holes are also provided on the lower side of the PP plate, allowing it to be fixed with bolts at one of the bolt holes.

[0013] The buffer layer, made of permeable elastic material, is fixed to the retaining surface of the wall to buffer the soil.

[0014] When in use, the length of the telescopic steel rod is adjusted according to the stacking height of the polypropylene plates so that it can pass through the stacked polypropylene plates in the vertical direction.

[0015] The first layer of polypropylene panels in the wall, away from the buffer layer, is fixed by telescopic steel rods, while the remaining polypropylene panels are fixed to the concrete platform foundation slab through threaded holes and bolts at the bottom.

[0016] Furthermore, a row of mounting holes is provided on the concrete platform foundation plate. This row of mounting holes is parallel to the bolt holes in each row and is located outside the bolt holes in each row. A support steel rod is fixed in each mounting hole to provide lateral support for the wall.

[0017] Furthermore, on the concrete platform foundation slab, steel frame column holes are symmetrically arranged on both sides of at least one row of bolt holes, with columns fixed inside. The height of the columns is the same as the height of the wall. The upper ends of each pair of columns are connected by steel beams, and multiple fastening holes are arranged at intervals on the steel beams. Screws are driven into the corresponding upper ends of the wall through the fastening holes to achieve mutual fixation between the steel beams and the wall.

[0018] Furthermore, the buffer layer is cast from a permeable polymer.

[0019] Furthermore, multiple drainage holes are evenly distributed on the buffer layer.

[0020] The technical solution of the retaining wall construction method of the present invention is as follows: The retaining wall construction method includes the following steps:

[0021] S10. Cast concrete platform foundation slabs on site or prefabricate precast concrete platform foundation slabs in advance, and process or prefabricate at least two rows of parallel bolt holes on the concrete platform foundation slabs before installation.

[0022] S20. Transport the processed rectangular polypropylene slabs to the construction site. First, fix each telescopic steel rod to one of the bolt holes on the row of bolt holes on the concrete platform foundation slab. Then, fix the bottom layer of polypropylene slabs to the other rows of bolt holes with bolts. Place the concrete platform foundation slab on the cement mortar.

[0023] S30. Insert the innermost layer of polypropylene panels into the corresponding telescopic steel rods one by one through their through holes. While inserting, adjacent polypropylene panels are spliced ​​together by the protrusions and grooves. Adjust the height of the telescopic steel rods according to the height of the wall.

[0024] S40. The remaining polypropylene panels are spliced ​​together on the layer of polypropylene panels that have been fixed with bolts in S20 to form the remaining layers of the wall. When installing the polypropylene panels, the wavy structure of the polypropylene panel surface is used to ensure that the crests and troughs of the adjacent polypropylene panels fit together.

[0025] S50. Cast a buffer layer made of permeable elastic material on site outside the outermost layer of polypropylene slabs, or install and fix the prefabricated buffer layer components.

[0026] Furthermore, in S10 or temporarily on-site, a row of mounting holes is machined on the concrete platform foundation slab, ensuring that the mounting holes are parallel to each row of bolt holes and located outside each row of bolt holes. Support steel rods are fixed one by one in the mounting holes to provide lateral support for the wall.

[0027] Furthermore, in S10 or temporarily on-site, steel frame column holes are machined on the concrete platform foundation slab, so that the steel frame column holes are located on the outer sides of at least one row of bolt holes and are symmetrically arranged. Columns with the same height as the wall are fixed in the steel frame column holes. Steel beams are connected between the upper ends of each pair of columns. Multiple fastening holes are set at intervals on the steel beams. Screws are driven into the corresponding upper ends of the wall through the fastening holes to achieve mutual fixation between the steel beams and the wall.

[0028] The beneficial effects of the present invention: The retaining wall and its construction method of the present invention have the following advantages compared with traditional concrete retaining walls:

[0029] Lightweight, the main component of the retaining wall of this invention is polypropylene, which is the lightest of the commonly used plastics, with a density of only 0.91 g / cm³ (less than water), while the density of concrete is generally 2.8 g / cm³. The lightweight characteristic makes the retaining wall easy to transport and disassemble, and also provides a basis for reuse.

[0030] It is easy to assemble and disassemble. Not only is it lightweight, but the retaining wall of this invention is made of polypropylene panels with a special structure spliced ​​together by a concave-convex structure and fixed by telescopic steel rods and bolts. It is highly detachable and the disassembly and assembly operations are relatively simple, convenient and quick.

[0031] It can be reused multiple times. As described in (1) and (2) above, the retaining wall of the present invention is lightweight and easy to assemble and disassemble. In addition, polypropylene has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion, which makes it easy to be reused multiple times without damage and can be reused for a long time. This also indirectly saves a lot of material costs.

[0032] This invention effectively solves drainage problems. Traditional concrete retaining walls have extremely poor permeability and generally rely on drainage pipes. However, due to the susceptibility of soil to landslides, drainage pipes are easily clogged, leading to poor drainage. Water accumulation not only increases the pressure on the retaining wall but also easily damages the soil, increasing the probability of landslides. In addition, drainage pipes are inconvenient to install on-site and difficult to clean up afterward, increasing the workload considerably. In contrast, the retaining wall of this invention, while ensuring strength, has a second drainage channel on the surface of the polypropylene panels. The interface between adjacent polypropylene panels forms a first drainage channel. For the entire retaining wall, the first and second drainage channels are evenly distributed and numerous, making the entire wall permeable. Even if some areas at the bottom are blocked by soil and water permeability is slow, the rest of the wall has multiple drainage channels, enabling rapid drainage and preventing excessive water accumulation over a long period from damaging the wall and soil.

[0033] High strength is achieved not only from the inherent strength of the polypropylene panels themselves and the high strength of the corrugated structure, but also from the staggered arrangement of the wave crests and troughs between adjacent layers of the polypropylene panels, which further enhances the load-bearing capacity between them. In addition, the connection of the telescopic steel rods and bolts and their fixation relative to the concrete platform foundation plate further improves the overall structural strength.

[0034] Impact resistance: In addition to the impact-resistant properties of polypropylene material itself, the addition of a buffer layer further enhances its impact resistance. Furthermore, both polypropylene panels and buffer layers are more elastic than concrete, so they can dissipate impact energy through elastic deformation when subjected to soil impact, resulting in better impact resistance.

[0035] It is highly adaptable. Because the polypropylene panels are modular, they can adapt to retaining wall requirements of different widths and heights. Moreover, the telescopic steel rods can be adjusted in height, so that retaining walls of different heights can be effectively supported by the telescopic steel rods, thereby improving the overall strength. In addition, since the present invention is mostly a prefabricated assembly structure, the solution of the present invention is more advantageous for some scenarios where on-site pouring construction is not convenient.

[0036] Furthermore, based on the above scheme, adding supporting steel rods can further improve the bearing capacity of the retaining wall, especially its long-term bearing capacity. In fact, after adding supporting steel rods, the structure that was originally used for temporary support can be transformed into a permanent support structure, which further improves the flexibility and adaptability of the present invention.

[0037] Furthermore, by adding columns and steel beams and connecting the steel beams to the wall, the retaining wall and the supporting structure are integrated, and the entire retaining wall becomes a single structure. Its mechanical properties, such as load-bearing capacity and strength, are improved, making it more suitable for permanent support, especially for permanent support in high-load-bearing scenarios.

[0038] Furthermore, the drainage holes on the buffer layer further enhance the drainage capacity of the retaining wall and prevent water accumulation. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a structural embodiment of the retaining wall of the present invention;

[0040] Figure 2 A first-person perspective stereoscopic view of a single polypropylene plate;

[0041] Figure 3 A second-view stereoscopic view of a single polypropylene plate;

[0042] Figure 4 This is a top view of the retaining wall installation process.

[0043] Figure 5 This is another embodiment of a retaining wall;

[0044] In the diagram: 1-Concrete platform foundation slab, 11-Bolt hole, 12-Mounting hole, 13-Steel frame column hole, 2-Telescopic steel rod, 3-Polypropylene plate, 33-Boss, 34-Groove, 35-Drainage channel, 36-Perforation, 37-Through hole, 4-Buffer layer, 5-Supporting steel rod, 6-Column, 7-Steel beam. Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] One embodiment of the retaining wall of the present invention: When used as a temporary retaining wall, the retaining wall includes a wall body composed of a concrete platform foundation slab 1, telescopic steel rods 2, and polypropylene panels 3, and a buffer layer 4; when used as a permanent retaining wall, it also includes supporting steel rods 5, steel beams 7, and columns 6, etc. In this embodiment, as shown... Figure 1 As shown, the retaining wall includes a concrete platform foundation slab 1, which is a rectangular foundation slab made of reinforced concrete. It can be cast on-site or prefabricated in a factory. It has at least two rows of parallel bolt holes 11; in this embodiment, three rows are provided for fixing two layers of polypropylene panels 3. It is important to note that the thickness of the concrete platform foundation slab 1 should be sufficient, and its width should be as wide as possible, if site dimensions permit, to ensure greater stability and load-bearing capacity.

[0047] like Figure 4 As shown, there are multiple telescopic steel rods 2, with adjustable lengths, fixed by bolts at one row of bolt holes 11. The telescopic steel rods 2 are perpendicular to the concrete platform foundation slab 1. The telescopic steel rods 2 employ a spring ball or similar locking adjustment structure, composed of multiple layers of steel sleeves, and possess a certain load-bearing capacity. A flange plate, significantly larger than the diameter of the telescopic steel rod 2, is installed at its lower part to fit against the concrete platform foundation slab 1, thereby improving the load-bearing capacity of the telescopic steel rod 2. That is, when the telescopic steel rod 2 is subjected to radial thrust, the load is unloaded onto the concrete platform foundation slab 1 by the flange plate. The flange plate can be circular, rectangular, or other polygonal shapes.

[0048] like Figure 1 As shown, the wall has multiple layers; this embodiment has three layers. Each layer is composed of multiple rectangular polypropylene panels 3 spliced ​​together. The surface of the polypropylene panels 3 has a wavy structure formed by regular concave and convex shapes. Adjacent layers of polypropylene panels 3 rely on the crests and troughs of the waves to achieve mutual adhesion. Figure 2-3As shown, the polypropylene slab 3 has protruding bosses 33 on its upper and right sides, and concave grooves 34 on its lower and left sides. The bosses 33 and grooves 34 on the left and right sides are identical in shape, and the bosses 33 and grooves 34 on the upper and lower sides are identical in shape. Specifically, the bosses 33 and grooves 34 on the upper and lower sides are one longer one, while the bosses 33 and grooves 34 on the left and right sides are two smaller ones. This is because the longer, continuous bosses 33 have a stronger load-bearing capacity, and their placement in the vertical direction is more conducive to transferring load to the concrete platform foundation slab 1. Adjacent polypropylene slabs 3 are joined together by the bosses 33 and grooves 34. Drainage channels 35 extending perpendicular to the surface of the polypropylene slab 3 are also provided on the upper, lower, left, and right sides of the polypropylene slab 3. The drainage channels 35 are provided on the four sides, with four on the upper and lower sides and three on the left and right sides. The specific number is determined according to the size of the polypropylene slab 3 and the drainage requirements. Similarly, the depth and width of the drainage groove 35 are also directly related to the above two factors. After adjacent polypropylene panels 3 are spliced ​​together, the drainage grooves 35 on the sides that fit together form the first drainage channel; the polypropylene panel 3 has multiple vertical through-holes 36 on its surface to form the second drainage channel. It should be noted that the middle part of the polypropylene panel should preferably have a row of through-holes 36, because this part corresponds to the first drainage channel of the adjacent polypropylene panel 3, so that drainage can be directly achieved and the drainage effect is better; the polypropylene panel 3 has through-holes 37 that penetrate itself in the vertical direction. The polypropylene panel 3 can be strung on the telescopic steel rod 2 through the through-holes 37. The through-holes 37 pass through the grooves 34 and bosses 33 on the upper and lower sides at the same time; the lower side of the polypropylene panel 3 also has threaded holes, and the polypropylene panel 3 can be fixed with bolts at one of the bolt holes 11. In use, the length of the telescopic steel rod 2 is adjusted according to the stacking height of the polypropylene panels 3 so that it can pass through the stacked polypropylene panels 3 in the vertical direction. The buffer layer 4 is made of permeable elastic material and is fixed to the retaining surface of the wall to buffer the soil. The layer of polypropylene panels 3 away from the buffer layer 4 is fixed by telescopic steel rods 2, and the remaining polypropylene panels 3 are fixed to the concrete platform foundation slab 1 through the threaded holes at the lower end and bolts.

[0049] like Figure 4As shown, a row of mounting holes 12 is also provided on the concrete platform foundation slab 1. This row of mounting holes 12 is parallel to and located outside each row of bolt holes 11. Supporting steel rods 5 are fixed one-to-one in each mounting hole 12 for lateral support of the wall. Steel frame column holes 13 are symmetrically arranged on the outer sides of at least one row of bolt holes 11 on the concrete platform foundation slab 1. Columns 6 are fixed inside these holes. The height of the columns 6 is the same as the height of the wall. Each pair of columns 6 is connected at their upper ends by steel beams 7. Multiple fastening holes are spaced apart on the steel beams 7. Screws are driven through these fastening holes into the corresponding upper ends of the wall to achieve mutual fixation between the steel beams 7 and the wall. The buffer layer 4 is cast from a permeable polymer, specifically a water-permeable polymer, and has good permeability. The drainage holes on the buffer layer 4 further improve the drainage capacity of the retaining wall and prevent water accumulation. Permeable polymers are a class of high-permeability polymer materials, typically possessing an open porous structure that allows water or other solutions to freely pass through. They are made from two components, A and B. Component A, the slurry, primarily consists of polyols, surfactants, and flame retardants, with a single-component density of 1.26 g / cm³. Component B, the slurry, mainly comprises plasticizers and polymeric isocyanates, with a single-component density of 1.17 g / cm³. The two components are mixed in a 1:1 mass ratio to produce a polyurethane polymer, or simply polymer. The curing time of the polymer can be adjusted by using a catalyst to change the activation energy of the reaction. Compared to traditional cementitious slurries, chemical slurries have lower viscosity and simpler grouting processes. This permeable polymer slurry is a water-soluble polymer material, with modified polyurethane as the main agent.

[0050] The specific construction steps are as follows:

[0051] like Figure 1 , 4As shown, for temporary support, a concrete platform foundation slab 1 is poured on-site or a precast concrete platform foundation slab 1 is fabricated in advance. Before installation, at least two rows of parallel bolt holes 11 are machined or precast on the concrete platform foundation slab 1. When it needs to be converted to permanent support, a row of mounting holes 12 is temporarily machined on-site or precast on the concrete platform foundation slab 1, ensuring that the mounting holes 12 are parallel to each row of bolt holes 11 and located outside each row of bolt holes 11. Support steel rods 5 are fixed one-to-one in the mounting holes 12 to provide lateral support for the wall. On-site, temporary steel frame column holes 13 are machined on the concrete platform foundation slab 1, with the steel frame column holes 13 located symmetrically on both sides of at least one row of bolt holes 11. Columns of the same height as the wall are fixed within the steel frame column holes 13. Steel beams 7 are connected between the upper ends of each pair of columns, and multiple fastening holes are spaced apart on the steel beams 7. Screws are driven through the fastening holes into the corresponding upper ends of the wall to achieve mutual fixation between the steel beams 7 and the wall. Adding supporting steel rods 5 further improves the load-bearing capacity of the retaining wall, especially its long-term load-bearing capacity. In fact, adding supporting steel rods 5 transforms a structure originally used for temporary support into a permanent support structure, further improving the flexibility and adaptability of the invention. Adding columns and steel beams 7, and connecting the steel beams 7 to the wall, achieves the integration of the retaining wall and the supporting structure, making the entire retaining wall a single structure. Its load-bearing capacity, strength, and other mechanical properties are improved, making it more suitable for permanent support, especially for permanent support in high-load-bearing scenarios.

[0052] The processed rectangular polypropylene slabs 3 are transported to the construction site. First, each telescopic steel rod 2 is fixed one by one on a row of bolt holes 11 on the concrete platform foundation slab 1. Then, the bottom layer of polypropylene slabs 3 is fixed to the other rows of bolt holes 11 with bolts. Finally, the concrete platform foundation slab 1 is placed on the cement mortar.

[0053] The innermost layer of polypropylene panels 3 on the wall is inserted through the through holes 37 one by one through the corresponding telescopic steel rods 2. At the same time, adjacent polypropylene panels 3 are spliced ​​together by the protrusions 33 and the grooves 34. The height of the telescopic steel rods 2 is adjusted according to the height of the wall.

[0054] The remaining polypropylene panels 3 are spliced ​​together on the layer of polypropylene panels 3 that have been fixed with bolts to form the remaining layers of the wall. When installing the polypropylene panels 3, the wavy structure of the polypropylene panel 3 is used to ensure that the crests and troughs of the adjacent polypropylene panels 3 fit together.

[0055] A buffer layer 4 made of permeable elastic material is poured on-site outside the outermost polypropylene plate 3, or a prefabricated buffer layer 4 component is installed and fixed.

[0056] The buffer layer can be completed through grouting construction. Specifically, after the polypropylene slab is fixed, permeable polymer grouting is carried out to form a buffer layer.

[0057] The recyclable polymer retaining wall structure provided by this invention is formed by splicing polypropylene panels. Therefore, when grouting the polymer buffer layer, grouting molds are usually used to achieve the grouting of the buffer layer.

[0058] Before construction, the grouting mold needs to be set up. The specific steps are as follows:

[0059] Based on the retaining wall structure design, determine the size and shape of the grouting mold.

[0060] The grouting molds are fixed to the retaining wall body using methods such as steel bars and expansion bolts. It is necessary to ensure that the spacing between the grouting molds and the grouting depth are uniform to guarantee a consistent buffer layer thickness.

[0061] After setting up the grouting mold, the specific steps for grouting the polymer buffer layer are as follows:

[0062] The mixed polymer material is injected into the grouting mold through the grouting port at the top of the retaining wall.

[0063] Ensure that the polymer material fills the gaps in the grouting mold and fits tightly against the retaining wall body.

[0064] Waiting for the polymer material to cure.

[0065] Remove the grouting mold, clean it thoroughly, and then proceed with the construction of the next grouting mold.

[0066] It is important to note that the setting and removal of grouting molds should be done with care to avoid causing unnecessary damage to the retaining wall.

[0067] The main component of the retaining wall of this invention is polypropylene, which is the lightest of commonly used plastics, with a density of only 0.91 g / cm³ (less than water), while the density of concrete is generally 2.8 g / cm³. This lightweight characteristic makes the retaining wall easy to transport and disassemble, and also provides a basis for reuse. The retaining wall of this invention is constructed from specially structured polypropylene panels 3, spliced ​​together using a concave-convex structure and fixed with telescopic steel rods 2 and bolts. It is highly removable, and the disassembly and assembly operations are relatively simple, convenient, and quick. Traditional concrete retaining walls have extremely poor permeability and generally rely on drainage pipes for drainage. However, due to the susceptibility of soil to landslides, drainage pipes are easily clogged, leading to poor drainage. Water accumulation not only increases the pressure on the retaining wall but also easily damages the soil, increasing the probability of landslides. In addition, drainage pipes are often inconvenient to construct on-site and difficult to clean up afterwards, increasing the workload considerably. In contrast, the retaining wall of this invention, while ensuring strength, has a second drainage channel on the surface of the polypropylene panel 3. The interface between adjacent polypropylene panels 3 forms a first drainage channel. For the entire retaining wall, the first and second drainage channels are evenly distributed and numerous, making the entire wall permeable. Even if some areas at the bottom are blocked by soil and water permeability is slow, the rest of the wall has multiple drainage channels, enabling rapid drainage and preventing excessive water accumulation over a long period from damaging the wall and soil. In addition to the inherent high strength of the polypropylene panels 3 and their corrugated structure, the staggered arrangement of the wave crests and troughs between adjacent layers of polypropylene panels 3 further enhances their mutual load-bearing capacity. Furthermore, the connection of the telescopic steel rods 2 and bolts, and their fixation relative to the concrete platform foundation slab 1, further improves the overall structural strength. Besides the inherent impact resistance of polypropylene, the buffer layer 4 further enhances impact resistance. Both the polypropylene panels 3 and the buffer layer 4 are more elastic than concrete, allowing them to dissipate impact energy through elastic deformation when subjected to soil impact, resulting in better impact resistance. Because the polypropylene panels 3 are modular, they can adapt to retaining wall requirements of varying widths and heights. Moreover, the telescopic steel rods 2 are height-adjustable, ensuring effective support for retaining walls of different heights, thereby improving overall strength. Additionally, since this invention primarily utilizes prefabricated assembly structures, its solution is more advantageous in scenarios where on-site casting is inconvenient.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A retaining wall, characterized in that, include: The concrete platform foundation slab has at least two rows of parallel bolt holes. Multiple telescopic steel rods of adjustable length are fixed to one of the bolt holes in the row of bolts. The telescopic steel rods are perpendicular to the concrete platform foundation slab. The wall has multiple layers, each layer is made up of multiple rectangular polypropylene panels. The surface of the polypropylene panels has a wave-shaped structure formed by regular concave and convex shapes. Adjacent polypropylene panels rely on the crests and troughs of the waves to fit together. The polypropylene (PP) plate has protruding bosses on its upper and right sides, and recessed grooves on its lower and left sides. Adjacent PP plates are joined together by these bosses and grooves. Drainage grooves extending perpendicular to the surface of the PP plate are also provided on its upper, lower, left, and right sides. When adjacent PP plates are joined, the drainage grooves on their mating sides form a first drainage channel. Multiple through-holes perpendicular to the surface of the PP plate form a second drainage channel. The PP plate has through-holes extending vertically through itself, allowing it to be strung onto a telescopic steel rod. Threaded holes are also provided on the lower side of the PP plate, allowing it to be fixed with bolts at one of the bolt holes. The buffer layer, made of permeable elastic material, is fixed to the retaining surface of the wall to buffer the soil. When in use, the length of the telescopic steel rod is adjusted according to the stacking height of the polypropylene panels so that it can pass through the stacked polypropylene panels in the vertical direction. The first layer of polypropylene panels in the wall, away from the buffer layer, is fixed by telescopic steel rods, while the remaining polypropylene panels are fixed to the concrete platform foundation slab through threaded holes and bolts at the bottom.

2. The retaining wall according to claim 1, characterized in that, A row of mounting holes is also provided on the concrete platform foundation slab. This row of mounting holes is parallel to the bolt holes in each row and is located on the outside of each row of bolt holes. Each mounting hole contains a corresponding support steel rod for lateral support of the wall.

3. The retaining wall according to claim 2, characterized in that, On the concrete platform foundation slab, steel frame column holes are symmetrically arranged on both sides of at least one row of bolt holes, with columns fixed inside. The height of the columns is the same as the height of the wall. The upper ends of each pair of columns are connected by steel beams. Multiple fastening holes are arranged at intervals on the steel beams. Screws are driven into the corresponding upper ends of the wall through the fastening holes to achieve mutual fixation between the steel beams and the wall.

4. The retaining wall according to any one of claims 1-3, characterized in that, The buffer layer is cast from a permeable polymer.

5. The retaining wall according to any one of claims 1-3, characterized in that, Multiple drainage holes are evenly distributed on the buffer layer.

6. The method for constructing a retaining wall according to claim 1, characterized in that, Includes the following steps: S10. Cast concrete platform foundation slabs on site or prefabricate precast concrete platform foundation slabs in advance, and process or prefabricate at least two rows of parallel bolt holes on the concrete platform foundation slabs before installation. S20. Transport the processed rectangular polypropylene panels to the construction site. First, fix each telescopic steel rod to one of the bolt holes on the concrete platform foundation plate. Then, fix the bottom layer of polypropylene panels to the bolt holes in the remaining rows using bolts. Place the concrete platform foundation plate on the cement mortar. S30. Pass the innermost layer of polypropylene panels through the through holes to the corresponding telescopic steel rods. While passing them through, adjacent polypropylene panels are spliced ​​together by the bosses and grooves. Adjust the height of the telescopic steel rods according to the height of the wall. S40. The remaining polypropylene panels are spliced ​​together on the layer of polypropylene panels that have been fixed with bolts in S20 to form the remaining layers of the wall. When installing the polypropylene panels, the wavy structure of the polypropylene panel surface is used to ensure that the crests and troughs of the adjacent polypropylene panels fit together. S50. Cast a buffer layer made of permeable elastic material on site outside the outermost layer of polypropylene slabs, or install and fix the prefabricated buffer layer components.

7. The retaining wall construction method according to claim 6, characterized in that, In S10, or temporarily on-site, a row of mounting holes is machined on the concrete platform foundation slab, ensuring that the mounting holes are parallel to each row of bolt holes and located outside each row of bolt holes. Support steel rods are fixed one by one in the mounting holes to provide lateral support for the wall.

8. The retaining wall construction method according to claim 7, characterized in that, In S10, or temporarily on-site, steel frame column holes are machined on the concrete platform foundation slab, so that the steel frame column holes are located on the outer sides of at least one row of bolt holes and are symmetrically arranged. Columns with the same height as the wall are fixed in the steel frame column holes. Steel beams are connected between the upper ends of each pair of columns. Multiple fastening holes are set at intervals on the steel beams. Screws are driven into the corresponding upper ends of the wall through the fastening holes to achieve mutual fixation between the steel beams and the wall.

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