A reusable fluid-solidified reinforced soil retaining wall structure

Abstract

This utility model discloses a reusable fluidized solidified reinforced soil retaining wall structure, belonging to the field of slope treatment technology. The structure includes a steel plate frame, a vertical geogrid, bolts, nuts, and fluidized solidified soil. The steel plate frame consists of left, right, and front baffles. The left and right steel plates are composed of multiple layers of stacked plates, with joint gaps used to secure the ends of the geogrid. Each baffle has aligned through holes, and the bolts pass through the through holes and the geogrid mesh, then are secured with nuts, forming a spatially coordinated anchoring system. This utility model features a simple structure, reliable connection, and low cost, effectively solving the problems of unstable reinforcement and easy displacement in traditional vertical reinforced structures, significantly improving the overall stability and durability of the retaining wall.

Description

Technical Field

[0001] This utility model belongs to the field of slope treatment technology, and in particular relates to a reusable fluidized solidified reinforced soil retaining wall structure. Background Technology

[0002] With the continuous advancement of infrastructure construction in my country, numerous exposed rock slopes have been created during the construction of highways, railways, and water conservancy and hydropower projects, highlighting the increasing importance of their stability and ecological restoration. Reinforced soil technology, due to its lower requirements for foundation bearing capacity, good deformation coordination capabilities, and ability to promote natural vegetation restoration and landscape integration, has become an important technical approach for achieving green and ecological slope protection. Currently, widely used reinforced retaining walls often employ a horizontal reinforcement design. Through the interfacial friction between the reinforcement and the fill soil, the lateral earth pressure and superstructure load borne by the wall are effectively transferred to the reinforced area and even the deep stable zone, thereby maintaining the overall structural stability and controlling slippage deformation. However, this traditional reinforcement method has significant limitations in mechanical performance: it fails to effectively utilize the tensile bearing potential of geogrid in the vertical direction, especially in areas of high stress concentration (such as the bottom of the wall and the range of active earth pressure), where the mechanical efficiency of the reinforcement is not fully utilized; at the same time, geogrids located in stable zones are inefficient due to lower stress, resulting in low utilization of the bearing capacity of the entire reinforcement system, which seriously restricts the further improvement of the retaining wall structure performance and has become a key technical bottleneck in the current optimization design of reinforced soil structures.

[0003] To address the aforementioned issues, existing technologies have attempted to introduce vertical reinforcement concepts to improve the structural stress mechanism. For example, invention patent application number CN202510073162.6 proposes a prefabricated multi-source solid waste fluidized solidified soil vertically reinforced retaining wall structure. This firstly employs vertically arranged geogrids as the primary reinforcement, combined with wall panels, steel pipe frames, and fluidized solidified soil components, achieving modular assembly, continuous pouring construction, and improved shear resistance. However, this technical solution still suffers from significant structural and technological defects: its core support system relies on a complex steel pipe frame structure, leading not only to high steel consumption and material costs but also significantly increasing processing and installation difficulty, thus limiting the economic viability and large-scale application prospects of this technology in slope retaining engineering. Furthermore, while the current method of fixing the vertical geogrid with steel wire ropes can achieve initial positioning and constraint during the initial construction phase, the steel wire ropes are prone to breakage or loosening due to fatigue accumulation under vibration disturbances during the pouring of the fluidized solidified soil, traffic cyclic loads during later service stages, or long-term slope sliding forces. This results in the geogrid losing effective anchorage and consequently its vertical tensile load-bearing capacity, severely impacting the long-term stability and safety of the structure. Therefore, there is an urgent need to develop a rationally constructed, reliably connected, and cost-effective vertically reinforced structural system to overcome the shortcomings of existing technologies in terms of mechanical properties, durability, and engineering applicability. Summary of the Invention

[0004] The purpose of this utility model embodiment is to provide a reusable fluidized solidified reinforced soil retaining wall structure to solve the problems of high cost and unstable geogrid fixation in the existing construction process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A reusable fluidized solidified reinforced soil retaining wall structure includes a steel plate frame, a vertically arranged geogrid, a plurality of screws, nuts that cooperate with the screws, and fluidized solidified soil filling the interior of the steel plate frame; The steel plate frame includes a left steel plate and a right steel plate arranged symmetrically, and a front baffle connected to the front side of the left steel plate and the right steel plate. The front baffle includes a vertical portion and a top inclined portion. The left and right steel plates are formed by stacking multiple independent plates along the height direction, with gaps reserved at the joints between adjacent plates, and the ends of the geogrid are inserted into the gaps. Multiple rows of through holes are respectively provided on the left steel plate, the right steel plate and the front baffle, and the through holes are aligned to form a continuous channel; The screw is inserted into the through hole and passes through the mesh of the geogrid. The nut is tightened at both ends of the screw, thereby spatially anchoring the steel plate frame, geogrid and screw together.

[0006] Furthermore, the thickness of the steel plate in the steel plate frame ranges from 35mm to 40mm.

[0007] Furthermore, the surface of the steel plate frame facing the backfill is provided with a diamond pattern.

[0008] Furthermore, the diameter of the through hole ranges from 15mm to 20mm, and the vertical spacing ranges from 450mm to 500mm.

[0009] Furthermore, the diameter of the screw ranges from 13mm to 18mm.

[0010] Furthermore, the plane of the geogrid is set perpendicular to the retaining wall surface.

[0011] Furthermore, the segment spacing between the left and right steel plates ranges from 300mm to 1000mm.

[0012] Furthermore, the fluidized solidified soil comprises a mixture of soil material, solidifying agent, cement, and water.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This utility model embodiment employs a reusable vertical reinforcement fixing structure for fluidized bed reinforced soil retaining walls. Compared to the traditional steel pipe frame fixing method, it utilizes detachable bolts, nuts, and steel plate frames, allowing for repeated use of the vertical reinforcement fixing structure. This significantly reduces material and construction costs, simplifies installation processes, and improves construction efficiency. This technical solution, while ensuring structural performance, combines good economic efficiency and ease of construction, facilitating the large-scale application and promotion of reinforced soil retaining wall structures in engineering scenarios such as steep slopes and complex geological conditions. Through the synergistic effect of steel plate bearing, geogrid reinforcement, and bolt anchoring, a three-dimensional composite spatial anchoring system is constructed. This effectively enhances the pull-out resistance and spatial constraint capacity of the geogrid during concrete pouring and long-term use, preventing reinforcement displacement or failure, and significantly improving the reliability of the reinforcement-soil interface and the overall structural stability. This utility model structure fully utilizes the tensile strength of the geogrid, improving the overall load-bearing capacity and durability of the reinforced soil retaining wall. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an elevation view of the vertical reinforcement fixing structure of the reusable fluidized solidified reinforced soil retaining wall according to this embodiment; Figure 2 This is a side view of the vertical reinforcement fixing structure of the reusable fluidized solidified reinforced soil retaining wall according to this embodiment; Figure 3 This is a side view of the slope and retaining wall in this embodiment; In the diagram, 1. Steel plate frame; 11. Left steel plate; 12. Right steel plate; 13. Front baffle; 2. Geogrid; 3. Screw; 4. Nut; 5. Hook; 6. Steel rope; 7. Slope; 8. Fluidized solidified soil; 9. Through hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-3 This embodiment provides a reusable fluidized solidified reinforced soil retaining wall structure, the retaining wall structure including a steel plate frame 1, a vertically arranged geogrid 2, screws 3, nuts 4, and fluidized solidified soil 8 filled inside the structure.

[0018] like Figure 1 In some specific embodiments, the steel plate frame 1 has a steel plate thickness ranging from 35mm to 40mm, including a left steel plate 11 and a right steel plate 12 symmetrically arranged on the left and right sides of the retaining wall, and a front baffle 13 located on the front side of the retaining wall and connecting the front side and the upper slope. The left steel plate 11 and the right steel plate 12 are arranged parallel to each other on the left and right sides of the retaining wall, perpendicular to the slope surface of the slope 7, forming the lateral boundary of the retaining wall. The front steel plate includes an integrally welded vertical portion and a top slope portion; the included angle between the vertical portion and the top slope portion is adjusted according to the slope of the slope 7.

[0019] In some alternative embodiments, the surface of the steel plate frame 1 facing the backfill is provided with a diamond pattern to increase the interfacial friction coefficient between the structure and the soil, thereby effectively improving the overall anti-sliding stability of the retaining wall.

[0020] In some specific embodiments, the steel plate frame 1 and the slope 7 enclose a closed cavity to accommodate the fluidized solidified soil 8 and the geogrid 2.

[0021] In some specific embodiments, the left steel plate 11 and the right steel plate 12 are segmented into independent plates according to the number of layers and vertical spacing of the geogrid 2, with a spacing range of 300mm to 1000mm. Too small a spacing will result in too many steel plate segments, increasing the number of manufactured and installed plates and joints, thus increasing manufacturing costs and installation complexity, directly affecting overall construction efficiency. Conversely, too large a spacing will lead to insufficient constraint of the geogrid 2 by the steel plate frame 1, affecting the reliability of the overall structure. The plates are stacked along the height direction, with gaps reserved at the joints for securing the ends of the geogrid 2.

[0022] In some specific embodiments, through holes 9 are formed in the thickness direction of the left steel plate 11 and the right steel plate 12 from top to bottom. The diameter of the through holes 9 ranges from 15mm to 20mm, and the vertical spacing ranges from 450mm to 500mm. The hole diameter matches the outer diameter of the screw 3. If the screw spacing is too large, the connection stiffness between the sections of the steel plate frame 1 will be insufficient. Under the lateral pressure of the fluidized solidified soil 8, the steel plate frame 1 may bulge outward between the screws 3, failing to effectively form a sealed frame structure to prevent leakage and runoff of the fluidized solidified soil 8. In addition, the screws 3 are key to fixing the geogrid 2. If the spacing is too large, it will reduce the restraint effect on it, making it difficult to ensure that the geogrid 2 does not shift during pouring and service. Through holes 9 of the same diameter are formed on the vertical and inclined parts of the front steel plate. The hole positions are precisely aligned with the channels of the left steel plate 11 and the right steel plate 12 to form continuous channels.

[0023] In some specific embodiments, the screw 3 is inserted into the through hole 9 provided in the steel plate frame 1 and simultaneously penetrates the grid on both sides of the geogrid 2. The screw 3 is fixed at both ends using the nuts 4, so as to achieve spatial coordinated anchoring of the steel plate frame 1, the geogrid 2 and the screw 3; forming a sealed frame structure to prevent leakage and runoff of the fluidized solidified soil 8. In some specific implementations, the geogrid 2 is vertically installed inside the retaining wall, with its ends inserted into the gaps reserved in the joints of the steel plate frame 1; the plane of the geogrid 2 is perpendicular to the surface of the retaining wall (i.e., parallel to the shear direction) to maximize tensile strength. In some specific embodiments, the diameter of the screw 3 ranges from 13mm to 18mm, slightly smaller than the diameter of the through hole 9. The screw 3 first passes through the through holes 9 of the left steel plate 11 and the right steel plate 12; then it passes through the mesh of the geogrid 2 and the through hole 9 of the front steel plate. Both ends of the screw 3 are tightened and fixed by nuts 4. Through the synergistic working mechanism of the steel plate frame 1 bearing pressure, the geogrid 2 reinforcing and the screw 3 anchoring, a three-dimensional composite spatial anchoring system is constructed to ensure that the geogrid 2 does not shift during pouring and service.

[0024] In some specific implementations, during construction, the hook 5 is welded to the center point of the left steel plate 11 and the right steel plate 12 in the height direction, facing outwards from the slope 7; one end of the steel rope 6 is connected to the hook 5, and the other end extends obliquely to the ground anchor point to prevent the retaining wall structure from shifting during the pouring process. After curing, the steel rope 6 should be removed and the hook 5 should be cut; to reduce the construction area, the angle between the steel rope 6 and the ground is 60°~80°.

[0025] In some specific embodiments, the fluid solidification comprises a mixture of soil, a solidifying agent, cement, and water, with the following composition ratio: 100 parts by weight of soil, 8-10 parts by weight of solidifying agent, 30-40 parts by weight of water, and 2-5 parts by weight of cement. The soil is preferably clay, silty clay, or sandy loam, with a particle size not exceeding 50 mm and an organic matter content not exceeding 5%, belonging to both coarse and fine-grained soils. Untreated contaminated soil cannot be used as raw material for solidified soil. The solidifying agent is an inorganic hydraulic cementitious material with CaO, SiO2, and Al2O3 as its main components. After thorough mixing with the engineering soil, the solidifying agent, through physical and chemical reactions between its components and with the soil, can significantly improve the physical and mechanical properties of the soil, forming a solidified body that meets environmental standards and maintains long-term stability.

[0026] In some specific embodiments, the soil material of the fluidized solidified soil 8 includes treated contaminated soil; specifically, it includes treated heavy metal contaminated soil, organic contaminated soil, petroleum contaminated soil, dye contaminated soil, and pesticide contaminated soil. Heavy metal contaminated soil is treated using methods such as chemical stabilization, solidification / stabilization, and soil leaching. By adding solidifying agents such as cement, lime, or fly ash, heavy metals are fixed within soil particles, preventing their migration. Organic contaminated soil is treated by removing pollutants through biodegradation, thermal desorption, or chemical oxidation. Treatment measures for petroleum contaminated soil include physical separation, chemical oxidation, and bioremediation to remove petroleum components. Dye contaminated soil is purified using adsorption materials, chemical oxidation, or biodegradation. Pesticide contaminated soil is treated by biodegradation, chemical decomposition, or soil leaching to decompose residual pesticides. After the above treatment, these soils can all be used as raw materials to prepare the fluidized solidified soil 8, achieving resource recycling.

[0027] In some possible implementations, the screw 3, nut 4, and steel plate frame 1 are detachable, allowing the fixing structure of the vertical reinforcement of the fluidized solidified reinforced soil retaining wall to be reused.

[0028] In some possible implementations, the construction method for the reusable solidified reinforced soil retaining wall vertical reinforcement fixing structure is specifically carried out according to the following steps: S1. Determine the quantity and spacing of the geogrid 2 to be laid; S2. Earthwork excavation, setting up temporary slope support structure 7; S3. Clean the bottom of the foundation pit, measure the height of the foundation pit, and set up baffles around the foundation pit according to the height of the foundation pit; S4. Spatially anchor the steel plate frame 1, geogrid 2, and bolts 3 in the foundation pit. Use lifting machinery to hoist the left steel plate 11 and right steel plate 12, geogrid 2, and bolts 3 together. Use lifting machinery to pass the front steel plate through the bolts 3. Tighten the bolts 3 with nuts 4 at both ends. Weld hooks 5 at the center of the hoisted left steel plate 11 and right steel plate 12. Connect one end of the steel rope 6 to the hooks 5 and the other end to the ground to prevent the geogrid 2 from moving. S5. Configure a pumping pipe and inject the fluidized solidified soil 8 into the vertical reinforcement fixing structure of the reusable fluidized solidified reinforced soil retaining wall through the pumping pipe. Stop pumping when the backfill height of the fluidized solidified soil 8 reaches the upper surface of the frame. S6. Curing the injected fluidized solidified soil 8; S7. Remove steel rope 6 and weld / cut hook 5; S8. Loosen nut 4, remove screw 3, and dismantle steel plate frame 1.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A reusable fluidized solidified reinforced soil retaining wall structure, characterized in that, It includes a steel plate frame (1), a vertically arranged geogrid (2), multiple screws (3), nuts (4) that cooperate with the screws (3), and fluidized solidified soil (8) filled inside the steel plate frame (1); The steel plate frame (1) includes a left steel plate (11) and a right steel plate (12) arranged symmetrically, and a front baffle (13) connected to the front side of the left steel plate (11) and the right steel plate (12), the front baffle (13) including a vertical portion and a top inclined portion; The left steel plate (11) and the right steel plate (12) are made of multiple independent plates stacked along the height direction, with gaps reserved at the joints between adjacent plates, and the ends of the geogrid (2) are inserted into the gaps; Multiple rows of through holes (9) are respectively opened on the left steel plate (11), the right steel plate (12) and the front baffle (13), and the through holes (9) are aligned to form a continuous channel; The screw (3) is inserted into the through hole (9) and passes through the grid of the geogrid (2). The nut (4) is tightened at both ends of the screw (3), thereby spatially anchoring the steel plate frame (1), the geogrid (2) and the screw (3).

2. The reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The thickness of the steel plate in the steel plate frame (1) ranges from 35mm to 40mm.

3. The reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The steel plate frame (1) has a diamond pattern on the surface facing the backfill.

4. The reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The diameter of the through hole (9) ranges from 15mm to 20mm, and the vertical spacing ranges from 450mm to 500mm.

5. A reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The diameter of the screw (3) ranges from 13mm to 18mm.

6. The reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The geogrid (2) is set with its plane perpendicular to the retaining wall surface.

7. A reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The segment spacing between the left steel plate (11) and the right steel plate (12) ranges from 300mm to 1000mm.

8. A reusable fluidized solidified reinforced soil retaining wall structure according to claim 1, characterized in that, The fluidized solidified soil (8) comprises a mixture of soil, solidifying agent, cement and water.

Images