A retaining wall structure and a bridge

Abstract

This utility model relates to a retaining wall structure and a bridge / culvert, comprising a wall panel, a base plate, pile foundations, buttress panels, a composite drainage net, and a reverse-filter gravel layer. In the retaining wall structure provided in this application, drainage holes are opened in the wall panel, and the drainage holes are inclined, with the angle between the centerline of the drainage hole and the horizontal direction being 10°~45°. This arrangement facilitates the rapid discharge of accumulated or seeping water from the drainage holes, improving drainage efficiency. Infiltrated water within the backfill is filtered through the composite drainage net and the gravel reverse-filter layer to reduce soil loss during the drainage process. Furthermore, the composite drainage net's guiding effect allows the filtered infiltrated water to be quickly discharged through the drainage holes, achieving rapid drainage of the retaining wall structure and ensuring smooth drainage.

Description

Technical Field

[0001] This utility model relates to the field of bridge and culvert technology, and in particular to a retaining wall structure and a bridge / culvert. Background Technology

[0002] In open-pit mining operations, large and small vehicles are needed to transport different materials. However, vehicles traveling in opposite directions can easily cause traffic congestion at intersections, thus affecting material transportation. Therefore, bridges and culverts are needed to achieve three-dimensional separation of vehicles. When constructing bridges and culverts, retaining wall structures are required to stabilize the backfill soil on both sides of the bridges and culverts.

[0003] In existing technologies, the retaining walls of bridges and culverts are filled with backfill soil. However, during rainy days, water often accumulates and seeps into the bridges and culverts and cannot be drained in time, affecting the load-bearing capacity and service life of the bridges and culverts. Utility Model Content

[0004] This utility model provides a retaining wall structure and a bridge / culvert to improve the drainage performance of the bridge / culvert and extend its service life.

[0005] A retaining wall structure, comprising: The wall panel has multiple drainage holes that penetrate its thickness; the port of the drainage hole located on the first side wall of the wall panel is higher than the port of the drainage hole located on the second side wall of the wall panel; the angle between the centerline of the drainage hole and the horizontal direction is an acute angle. The bottom of the wall panel is fixedly connected to the base plate; The pile foundation is fixedly connected to the base plate and extends downwards below the ground surface; A buttress panel, wherein the buttress panel is fixedly connected to the first side wall of the wall panel, and the bottom of the buttress panel is fixedly connected to the base plate; A composite drainage net is fixedly attached to the first sidewall of the wall panel; The reverse filter gravel layer is fixedly attached to the side of the composite drainage net away from the wall panel.

[0006] In some implementations, the drain hole is a square hole, a round hole, an elliptical hole, a trapezoidal hole, or a triangular hole; Wherein, when the drain hole is an elliptical hole, the angle between the major axis of the elliptical hole and the horizontal direction is less than or equal to 5°; or the minimum inner diameter of the drain hole is 5cm to 15cm.

[0007] In some implementations, the multiple drainage holes are arranged in multiple columns along the horizontal direction, with any two adjacent columns of drainage holes staggered; and / or, the multiple drainage holes are arranged in multiple rows along the vertical direction, with any two adjacent rows of drainage holes staggered.

[0008] In some implementations, the reverse filter gravel layer includes a first gravel layer and a second gravel layer, wherein the second gravel layer is located on the side of the first gravel layer away from the wall panel; The first gravel layer and / or the second gravel layer satisfy one or more of the following conditions: The first gravel layer contains gravel with a diameter of 15mm to 25mm; The second gravel layer contains gravel with a diameter of 1mm to 5mm; The thickness of the first gravel layer is 0.2m to 0.4m; The thickness of the second gravel layer is 0.1m to 0.3m.

[0009] In some implementations, the retaining wall structure further includes a concrete cushion layer and a crushed stone cushion layer disposed sequentially on the underside of the base plate, and the pile foundation extends through the concrete cushion layer and the crushed stone cushion layer to below ground level.

[0010] In some implementations, the thickness of the crushed stone cushion layer is 0.3m to 0.6m; and / or, the thickness of the concrete cushion layer is 0.1m to 0.2m.

[0011] In some implementations, the width of the concrete cushion layer and the crushed stone cushion layer is greater than the width of the base plate along the direction perpendicular to the wall panel; the distance of the concrete cushion layer and the crushed stone cushion layer extending beyond the edge of the base plate is greater than or equal to 0.5m.

[0012] In some implementations, a drain pipe is fitted inside the drain hole; and / or the angle between the centerline of the drain hole and the horizontal direction is 10°~45°.

[0013] In some implementations, the wall panel, base plate, and buttress are integrally cast with reinforced concrete; or, a drainage channel is provided on the side of the base plate away from the first sidewall of the wall panel.

[0014] In the retaining wall structure provided in this application, drainage holes are provided on the wall panel, and the drainage holes are inclined, with an acute angle between the centerline of the drainage hole and the horizontal direction. This arrangement facilitates the rapid discharge of accumulated or seeping water from the drainage holes, improving drainage efficiency. For example, the angle between the centerline of the drainage hole and the horizontal direction can be 10° to 45°, such as 10°, 15°, 20°, 25°, 30°, 35°, 40°, or 45°. Furthermore, infiltrated water within the backfill is filtered through a composite drainage net and a gravel filter layer to reduce soil loss during drainage. In addition, the composite drainage net guides the filtered infiltrated water to be quickly discharged through the drainage holes, achieving rapid drainage of the retaining wall structure and ensuring smooth drainage.

[0015] A bridge culvert includes a retaining wall structure as described in any one of the above descriptions; the number of the retaining wall structures is two, and the two retaining wall structures are arranged opposite to each other, with tie cables provided between the two retaining wall structures; Geogrids are installed above and below the tie cables.

[0016] Compared with the prior art, the beneficial effects of the bridge and culvert provided in this application are the same as those of the aforementioned retaining wall structure, and will not be elaborated here. Attached Figure Description

[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram showing two retaining wall structures arranged opposite each other, as provided in an embodiment of this application. Figure 2 This is a top view of two retaining wall structures arranged opposite each other, as provided in an embodiment of this application.

[0019] Figure label: 1-Wall panel, 2-Backfill soil, 3-Base slab, 4-Pile foundation, 5-Buttress panel, 6-Drainage hole, 7-Reverse filter gravel layer, 8-Composite drainage net, 9-Gravel cushion layer, 10-Concrete cushion layer, 11-Bumper strip, 12-Tie steel cable, 13-Connecting ring, 14-Geogrid, 15-Drainage ditch, 16-Support plate. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] like Figures 1-2 As shown, this utility model provides a retaining wall structure, which includes a wall panel 1, a base plate 3, a pile foundation 4, a buttress panel 5, a composite drainage net 8, and a reverse-filtering crushed stone layer 7. The wall panel 1 can be vertically installed; two wall panels 1 are arranged opposite each other to form a backfill cavity, which is filled with soil or other filler to form a wall. The wall panel 1 has multiple drainage holes 6 penetrating its thickness, connecting a first side and a second side of the wall panel 1. The first side of the wall panel 1 is the side closer to the backfill soil 2, and the second side of the wall panel 1 is the side away from the backfill soil 2. The port of the drainage hole 6 located on the first side wall of the wall panel 1 is higher than the port of the drainage hole 6 located on the second side wall of the wall panel 1, that is, the side of the drainage hole 6 closer to the backfill soil 2 is higher than the side of the drainage hole 6 away from the backfill soil 2, to facilitate the timely drainage of seepage or accumulated water in the backfill cavity through the drainage holes 6. Furthermore, the angle between the centerline of the drainage hole 6 and the horizontal direction is 10°~45°, so that the drainage hole 6 has a certain slope, allowing seepage or accumulated water to be discharged more quickly.

[0026] The bottom of wall panel 1 is fixedly connected to the base plate 3 to support wall panel 1 and prevent it from sinking or tilting. Pile foundation 4 is fixedly connected to the base plate 3 and extends downwards below ground level to stabilize the positions of the base plate 3 and wall panel 1, preventing displacement of the base plate 3, misalignment of wall panel 1, and slippage of the base plate 3. Buttress panel 5 is fixedly connected to the first side wall of wall panel 1, and its bottom is fixedly connected to the base plate 3 to further strengthen the bond between the base plate 3 and wall panel 1 and prevent deformation. Multiple buttress panels 5 can be arranged sequentially along the extension direction of wall panel 1. Composite drainage net 8 is fixedly attached to the first side wall of wall panel 1; that is, the composite drainage net 8 is applied to the first side wall. The composite drainage net 8 has good corrosion resistance and can guide filtered seepage water to the drain hole 6, improving drainage efficiency.

[0027] The reverse filter gravel layer 7 is fixedly attached to the side of the composite drainage net 8 away from the wall panel 1. The reverse filter gravel layer 7 can filter the infiltrated water discharged from the drainage hole 6, prevent the backfill soil 2 from being carried away by the water flow, avoid problems such as unstable foundation caused by soil particle loss, ensure the smooth drainage of the retaining wall structure, and make the bridge and culvert road have high stability and long service life.

[0028] In the retaining wall structure provided in this application, drainage holes 6 are provided on the wall panel 1, and the drainage holes 6 are inclined, with an acute angle between the centerline of the drainage hole 6 and the horizontal direction. This arrangement facilitates the rapid discharge of accumulated or seeping water from the drainage holes 6, improving drainage efficiency. Optionally, the angle between the centerline of the drainage hole 6 and the horizontal direction can be 10°~45°, such as 10°, 15°, 20°, 25°, 30°, 35°, 40°, or 45°. Furthermore, infiltrated water within the backfill is filtered through a composite drainage net 8 and a gravel filter layer to reduce soil loss during drainage. In addition, the composite drainage net 8 guides the filtered infiltrated water to be quickly discharged through the drainage holes 6, achieving rapid drainage of the retaining wall structure and ensuring smooth drainage.

[0029] In some embodiments, the drain hole 6 can be a square hole, a round hole, an elliptical hole, a trapezoidal hole, or a triangular hole. That is, the drain hole 6 is cut along a plane perpendicular to its center line, and the cross-section of the drain hole 6 can be square, circular, elliptical, trapezoidal, or triangular. Of course, the drain hole 6 can also be other shapes, which are not limited here.

[0030] When the drainage hole 6 is an elliptical hole, the angle between the major axis of the elliptical hole and the horizontal direction is less than or equal to 5°. That is, the major axis of the elliptical hole is set approximately horizontally. This facilitates more water accumulation and seepage in the wall to flow into the drainage hole 6 and be discharged in a timely manner. Specifically, the angle between the major axis of the elliptical hole and the horizontal direction can be 5°, 4°, 3°, 2°, or 1°, etc.

[0031] In some embodiments, the minimum diameter of the drainage hole 6 is the minimum inner diameter of the drainage hole 6. For example, when the drainage hole 6 is an elliptical hole, the minor axis of the elliptical hole is the minimum inner diameter of the drainage hole 6. The minimum inner diameter of the drainage hole 6 is 5cm to 15cm to keep it within a reasonable range. This avoids the drainage hole 6 being too small to drain accumulated water in time, causing seepage, while also preventing the drainage hole 6 from being too large, which would affect the strength of the wall panel 1. For example, the minimum inner diameter of the drainage hole 6 is 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, 13cm, 14cm, or 15cm, etc.

[0032] Along the direction from the first sidewall to the second sidewall of the wall panel 1, the cross-sectional area of ​​the drain hole 6 gradually decreases to ensure that the port area of ​​the drain hole 6 located on the first sidewall of the wall panel 1 is large, which facilitates more accumulated water and seepage water to enter the drain hole 6 and be discharged in time.

[0033] In some embodiments, multiple drainage holes 6 are arranged in multiple rows along the horizontal direction, with any two adjacent rows of drainage holes 6 staggered, that is, any two adjacent rows of drainage holes 6 are staggered in the vertical direction, and the gaps between one row of drainage holes 6 and another row of drainage holes 6 are opposite. Alternatively, multiple drainage holes 6 are arranged in multiple rows along the vertical direction, with any two adjacent rows of drainage holes 6 staggered, that is, any two adjacent rows of drainage holes 6 are staggered in the horizontal direction, and the gaps between one row of drainage holes 6 and another row of drainage holes 6 are opposite. This arrangement results in a more uniform distribution of the multiple drainage holes 6, facilitating the rapid entry of accumulated water from various locations on the wall into nearby drainage holes 6 for timely drainage and improved drainage efficiency. It is understood that the above description is merely exemplary, and the embodiments of this application do not limit the scope of the invention.

[0034] In some embodiments, the spacing between any two adjacent drainage holes 6 is 1m to 3m to prevent excessive density among multiple drainage holes 6, which could affect the overall strength of the wall panel 1. For example, the spacing between any two adjacent drainage holes 6 is 1m, 2m, or 3m, etc.

[0035] In some embodiments, the reverse filter gravel layer 7 includes a first gravel layer and a second gravel layer, with the second gravel layer located on the side of the first gravel layer facing away from the wall panel 1. That is, the first and second gravel layers are stacked sequentially along the direction facing away from the wall panel 1. The diameter of the gravel in the first gravel layer is 15mm to 25mm to keep the diameter of the gravel within a reasonable range, resulting in smoother internal channels, lower water flow resistance, and easier drainage of seepage. For example, the diameter of the gravel in the first gravel layer is 15mm, 18mm, 20mm, 22mm, or 25mm, etc. The thickness of the first gravel layer is 0.2m to 0.4m to prevent the thickness from being too small, thus failing to achieve the filtration purpose, and to prevent the thickness from being too large, thus wasting raw materials. For example, the thickness of the first gravel layer is 0.2m, 0.25m, 0.3m, 0.35m, or 0.4m.

[0036] The second crushed stone layer contains crushed stones with a diameter of 1mm to 5mm to ensure that the diameter of the crushed stones is within a reasonable range, thus filtering out some colloids or fine particles. For example, the diameter of the crushed stones in the second crushed stone layer may be 1mm, 2mm, 3mm, 4mm, or 5mm. The thickness of the second crushed stone layer is 0.1m to 0.3m to prevent it from being too thin and failing to achieve the filtration purpose, while also preventing it from being too thick and wasting raw materials. For example, the thickness of the second crushed stone layer may be 0.1m, 0.15m, 0.2m, 0.25m, or 0.3m.

[0037] During construction, the first and second crushed stone layers must be constructed simultaneously with the backfill soil 2. A waterproof layer (not shown in the figure) should be installed on the underside of the composite drainage net 8 and the reverse filter crushed stone layer 7, adhering to the wall panel 1. This waterproof layer includes, but is not limited to, concrete and clay waterproof layers. The composite drainage net 8 has a unit area mass of not less than 1400 g / m², a thickness of not less than 7 mm, a longitudinal tensile strength of not less than 18 kN / m, and a transverse tensile strength of not less than 10 kN / m. It is understood that the above description is merely exemplary, and the embodiments of this application do not limit the scope of the application.

[0038] In some embodiments, such as Figure 1 As shown, the retaining wall structure also includes a concrete cushion layer 10 and a crushed stone cushion layer 9 sequentially disposed under the bottom slab 3, with the pile foundation 4 extending below ground level through the concrete cushion layer 10 and the crushed stone cushion layer 9. This technical solution, by supporting the bottom slab 3 with the concrete cushion layer 10 and the crushed stone cushion layer 9, improves the stability of the retaining wall structure on a soft roadbed, and strengthens and fixes the roadbed using the concrete cushion layer 10 and the crushed stone cushion layer 9, reducing the probability of the bottom slab 3 tilting. It is understood that the above description is merely exemplary, and the embodiments of this application do not limit the scope of the invention.

[0039] In some embodiments, the thickness of the crushed stone cushion layer 9 is 0.3m to 0.6m, so that the crushed stone cushion layer 9 is within a reasonable thickness range, ensuring that the crushed stone cushion layer 9 provides reasonable support for the base plate 3 while preventing the crushed stone cushion layer 9 from being too thick and wasting raw materials. For example, the thickness of the crushed stone cushion layer 9 can be 0.3m, 0.4m, 0.5m or 0.6m, etc.

[0040] In some embodiments, the thickness of the concrete cushion layer 10 is 0.1m to 0.2m, so that the concrete cushion layer 10 is within a reasonable thickness range, ensuring that the concrete cushion layer 10 provides reasonable support for the base plate 3 while preventing the concrete cushion layer 10 from being too thick and wasting raw materials. For example, the thickness of the concrete cushion layer 10 can be 0.11m, 0.13m, 0.15m, 0.18m, or 0.2m, etc.

[0041] In this embodiment, along the direction perpendicular to the wall panel 1, the widths of both the crushed stone cushion layer 9 and the concrete cushion layer 10 are greater than the width of the base slab 3. This ensures a more balanced support force between the crushed stone cushion layer 9 and the concrete cushion layer 10 on the base slab 3, thereby guaranteeing the stability of the base slab 3. The distance between the concrete cushion layer 10 and the crushed stone cushion layer 9 and the edge of the base slab 3 is greater than or equal to 0.5m to further prevent the base slab 3 from tilting. For example, the distance between the concrete cushion layer 10 and the crushed stone cushion layer 9 and the edge of the base slab 3 is 0.5m, 0.6m, 0.7m, 0.8m, 0.9m, or 1m.

[0042] For example, the thickness of the concrete cushion layer 10 is 0.1m, and it is tightly attached to the bottom of the base slab 3; the thickness of the crushed stone cushion layer 9 is 0.5m, and it is tightly attached to the bottom of the concrete cushion layer 10; the bottom end of the pile foundation 4 extends downward and passes through the concrete cushion layer 10 and the crushed stone cushion layer 9 successively. It is understood that the above description is only exemplary, and the embodiments of this application do not limit the scope of the application.

[0043] In some embodiments, a drain pipe is fitted inside the drain hole 6 to reduce the erosion and damage to the inner wall surface of the drain hole 6 caused by seepage. The drain pipe can be a polyvinyl chloride (PVC) pipe. The diameter of the drain pipe is 80mm to 120mm. For example, the diameter of the drain pipe is 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, or 120mm, etc.

[0044] In some embodiments, the wall panel 1, the base plate 3, and the buttress panel 5 are integrally cast with reinforced concrete to further improve the stability of the retaining wall structure.

[0045] In some embodiments, a drainage ditch 15 is also provided on the side of the base plate 3 away from the first sidewall of the wall panel 1. That is, a drainage ditch 15 is also provided on the side of the base plate 3 located on the wall panel 1 away from the backfill soil 2. The drainage ditch 15 is provided along the extension direction of the wall panel 1. The drainage ditch 15 collects and guides the seepage water. The seepage water discharged through the drain hole 6 can be discharged to a preset position through the drainage ditch 15.

[0046] In some embodiments, such as Figure 1 As shown, a crash barrier 11 is also provided at the top of the wall panel 1. The crash barrier 11 can be integrally cast with the wall panel 1. The top surface of the crash barrier 11 is located above the top surface of the backfill soil 2. The reinforced concrete wall panel 1 and the crash barrier 11 have the advantages of being easy to cast, not prone to fatigue, having high strength, and having a long service life.

[0047] In some embodiments, such as Figure 1 As shown, the wall panel 1 also includes a support plate 16 fixedly connected to its first side wall. The support plate 16 is fixedly connected to both the base plate 3 and the wall panel 1 to support the wall panel 1 on the side of the wall panel 1 away from the backfill soil 2, prevent the wall panel 1 from tilting, and improve the strength and stability of the wall panel 1.

[0048] This application also provides a bridge culvert that includes a retaining wall structure as described in any of the above-mentioned examples. Compared with the prior art, the beneficial effects of the bridge culvert provided in this application are the same as those of the aforementioned retaining wall structures, and will not be elaborated here.

[0049] In the bridge and culvert structure, there are two retaining wall structures, which are arranged opposite each other to form a backfill cavity between them. Tie cables 12 are installed between the two retaining wall structures; one end of the tie cable 12 is fixed relative to the wall panel 1 of one retaining wall structure, and the other end is fixed relative to the wall panel 1 of the other retaining wall structure. This tie cables 12 limit the movement of the two retaining wall structures and prevent relative displacement.

[0050] In some embodiments, such as Figure 1 As shown, a connecting ring 13 is provided in the middle of the buttress panel 5, and a tie cable 12 is installed between the buttress panels 5 of the two retaining wall structures. That is, the two ends of the tie cable 12 are fixedly connected to the connecting ring 13 on the buttress panels 5 of the two retaining wall structures respectively. The tie cable 12 moves back and forth in an S-shape between the two retaining wall structures to tighten the two wall panels 1. Of course, the tie cable 12 can also be directly fixedly connected to the wall panel 1, which is not limited here.

[0051] In some embodiments, there are two tie cables 12, and a connecting ring 13 is fixedly connected to the middle of each buttress plate 5. Both tie cables 12 are S-shaped and alternately connected to different connecting rings 13 on different buttress plates 5. The tie cables 12 connect the two wall plates 1 into one unit, allowing the force of the backfill soil 2 in the backfill cavity to be applied more evenly to the two wall plates 1, thereby improving the stability of the retaining wall structure. It is understood that the above description is merely exemplary, and the embodiments of this application do not limit the scope of the invention.

[0052] In some embodiments, geogrids 14 are provided above and below the tie cables 12. That is, two layers of geogrids 14 are provided between any two opposite buttresses 5, with one layer above the tie cables 12 and the other below, to prevent the backfill soil 2 from collapsing. Each layer of geogrid 14 is fixedly connected to the side of the wall panel 1 by pre-embedded fasteners. The geogrids 14 are used to reduce the lateral slippage of the backfill soil 2 and improve the stress condition of the wall panel 1. It is understood that the above description is merely exemplary, and the embodiments of this application do not limit the scope of the invention.

[0053] In some embodiments, the overall width of the two opposing retaining wall structures is 35m to 45m, for example, 35m, 38m, 40m, 42m or 45m. The height of the retaining wall structure is 12m to 20m, for example, 12m, 15m, 16m, 18m or 20m.

[0054] In summary, this utility model features inclined drainage holes 6 on the wall panel 1, and a composite drainage net 8 and a reverse-filtering gravel layer 7 on the soil-facing surface of the wall panel 1. The reverse-filtering gravel layer 7 filters the infiltrated water in the backfill soil 2, and combined with the drainage effect of the composite drainage net 8, the filtered infiltrated water is quickly discharged through the drainage holes 6, achieving rapid drainage of the retaining wall structure and ensuring its safety. Downward-extending pile foundations 4 are installed on the base slab 3, improving the stability of the connection between the base slab 3 and the ground and reducing the probability of slippage. A concrete cushion layer 10 and a gravel cushion layer 9 are provided below the base slab 3, supporting the base slab 3 and improving its stability on soft soil, further reducing the probability of slippage. This invention features a tie cable 12 connected to a buttress panel 5 between two wall panels 1. The tie cable 12 connects the two wall panels 1, ensuring equal stress on both panels and preventing slippage, thus improving the stability of the retaining wall structure. A geogrid 14 is installed between adjacent buttress panels 5 to reduce lateral slippage of the backfill soil 2, further improving the stress distribution on the wall panels 1 and resulting in a retaining wall of the same size with higher retaining strength.

[0055] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A retaining wall structure, characterized in that, include: The wall panel has multiple drainage holes that penetrate its thickness; the port of the drainage hole located on the first side wall of the wall panel is higher than the port of the drainage hole located on the second side wall of the wall panel; the angle between the centerline of the drainage hole and the horizontal direction is an acute angle. The bottom of the wall panel is fixedly connected to the base plate; The pile foundation is fixedly connected to the base plate and extends downwards below the ground surface; A buttress panel, wherein the buttress panel is fixedly connected to the first side wall of the wall panel, and the bottom of the buttress panel is fixedly connected to the base plate; A composite drainage net is fixedly attached to the first sidewall of the wall panel; The reverse filter gravel layer is fixedly attached to the side of the composite drainage net away from the wall panel.

2. The retaining wall structure according to claim 1, characterized in that, The drainage hole can be a square hole, a round hole, an elliptical hole, a trapezoidal hole, or a triangular hole; Wherein, when the drain hole is an elliptical hole, the angle between the major axis of the elliptical hole and the horizontal direction is less than or equal to 5°; or the minimum inner diameter of the drain hole is 5cm to 15cm.

3. The retaining wall structure according to claim 1, characterized in that, Along the horizontal direction, the plurality of drainage holes are distributed in multiple rows, with any two adjacent rows of drainage holes staggered; and / or Along the vertical direction, the multiple drainage holes are arranged in multiple rows, and any two adjacent rows of drainage holes are staggered.

4. The retaining wall structure according to claim 1, characterized in that, The reverse filter crushed stone layer includes a first crushed stone layer and a second crushed stone layer, with the second crushed stone layer located on the side of the first crushed stone layer away from the wall panel; The first gravel layer and / or the second gravel layer satisfy one or more of the following conditions: The first gravel layer contains gravel with a diameter of 15mm to 25mm; The second gravel layer contains gravel with a diameter of 1mm to 5mm; The thickness of the first gravel layer is 0.2m to 0.4m; The thickness of the second gravel layer is 0.1m to 0.3m.

5. The retaining wall structure according to claim 1, characterized in that, The retaining wall structure also includes a concrete cushion layer and a crushed stone cushion layer arranged sequentially on the underside of the base plate, and the pile foundation extends through the concrete cushion layer and the crushed stone cushion layer to below the ground.

6. The retaining wall structure according to claim 5, characterized in that, The thickness of the crushed stone cushion layer is 0.3m to 0.6m; and / or the thickness of the concrete cushion layer is 0.1m to 0.2m.

7. The retaining wall structure according to claim 5, characterized in that, Along the direction perpendicular to the wall panel, the width of the concrete pad and the crushed stone pad is greater than the width of the base plate; the distance of the concrete pad and the crushed stone pad beyond the edge of the base plate is greater than or equal to 0.5m.

8. The retaining wall structure according to claim 1, characterized in that, A drain pipe is fitted inside the drain hole; and / or the angle between the centerline of the drain hole and the horizontal direction is 10°~45°.

9. The retaining wall structure according to claim 1, characterized in that, The wall panel, base plate, and buttress are integrally cast with reinforced concrete; or, a drainage channel is provided on the side of the base plate away from the first side wall of the wall panel.

10. A bridge culvert, characterized in that, The retaining wall structure includes any one of claims 1-9; the number of the retaining wall structures is two, and the two retaining wall structures are arranged opposite to each other, with tie cables provided between the two retaining wall structures; Geogrids are installed above and below the tie cables.

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