A retaining wall reinforcing structure

Abstract

The utility model relates to a retaining wall reinforcing structure, including anti -skidding stake unit, filling reinforcing unit and anti -skidding anchor rod unit. Anti -skidding stake unit sets up in the slope side of the shoulder retaining wall, and anti -skidding stake unit includes along anti -skidding stake, and anti -skidding stake extends along the direction of gravity, and anti -skidding stake includes the underground part of inserting in the first soil layer and the ground part of being exposed in the construction pit, and the first soil layer is located the slope bottom of construction pit, filling reinforcing unit sets up between ground part and shoulder retaining wall, and ground part and shoulder retaining wall are connected through filling reinforcing unit. Anti -skidding anchor rod unit includes lock foot anti -skidding anchor rod, and one end of lock foot anti -skidding anchor rod is connected with ground part, and the other end of lock foot anti -skidding anchor rod extends along the direction of angle with the direction of gravity, and sequentially passes through filling reinforcing unit and shoulder retaining wall to be located in the base layer below the road, wherein, along the direction of slope side direction to the road side, and the other end of lock foot anti -skidding anchor rod exceeds pipe culvert, and the other end of lock foot anti -skidding anchor rod is located below pipe culvert.

Description

Technical Field

[0001] This utility model belongs to the field of building support engineering technology, and specifically relates to a retaining wall reinforcement structure. Background Technology

[0002] Gravity masonry retaining walls are common shoulder retaining structures in mountainous areas, relying mainly on their own weight to resist lateral earth pressure. However, due to long-term road vibration loads and changes in the geological environment, they are prone to wall deformation, cracking, lateral slippage, and localized overturning and damage.

[0003] Road shoulder retaining walls typically conceal municipal culverts (drainage, communication, power, etc.), making demolition and reconstruction extremely difficult, risky, and time-consuming. Common in-situ repair methods such as mortar grouting and drilling grouting cannot completely improve the overall strength and stability of the retaining wall, leaving the risk of road instability and collapse unresolved. When using conventional anti-slide pile reinforcement, the reinforcement structure must avoid the culverts commonly found behind the retaining wall, making reinforcement inconvenient.

[0004] Therefore, in view of the defects and shortcomings of existing retaining wall reinforcement technology, it is necessary to seek a shoulder retaining wall reinforcement structure that can easily avoid culverts. Utility Model Content

[0005] In view of the above problems, this application provides a retaining wall reinforcement structure that can easily avoid culvert structures.

[0006] This application provides a retaining wall reinforcement structure for reinforcing a road shoulder retaining wall. The road shoulder retaining wall has a slope side and a road side arranged opposite to each other. The road side has a culvert, and the slope side has a construction pit. The retaining wall reinforcement structure includes an anti-slide pile unit, a filling reinforcement unit, and an anti-slide anchor unit. The anti-slide pile unit is disposed on the slope side of the road shoulder retaining wall. The anti-slide pile unit includes anti-slide piles extending along the gravity direction. The anti-slide piles include an underground part inserted into a first soil layer and an above-ground part exposed in the construction pit. The first soil layer is located at the bottom of the slope of the construction pit. The filling reinforcement unit is disposed between the above-ground part and the road shoulder retaining wall, and the above-ground part and the road shoulder retaining wall are connected by the filling reinforcement unit. The anti-slip anchor unit includes a locking anti-slip anchor, one end of which is connected to the ground surface, and the other end of which extends at an angle to the direction of gravity and passes through the filling reinforcement unit and the shoulder retaining wall in sequence to be located in the base layer below the road; wherein, along the slope side pointing towards the road side, the other end of the locking anti-slip anchor extends beyond the culvert and is located below the culvert.

[0007] In the above technical solution, the slope of the shoulder retaining wall is reinforced by setting anti-slide piles and filling reinforcement units. Simultaneously, by installing locking anti-slide anchors to connect the anti-slide piles, filling reinforcement units, and the shoulder retaining wall, the stability of the retaining wall is improved, and the lateral pressure on the anti-slide piles is reduced. Furthermore, since one end of the locking anti-slide anchor is connected to the ground, its position can be adjusted to ensure it is located below the culvert, thus improving the stability of the shoulder retaining wall while avoiding the culvert. This reinforcement structure also does not require the demolition of the existing shoulder retaining wall, has a relatively small width, minimal impact on the road and surrounding facilities, and allows for rapid construction.

[0008] In some embodiments, the anti-slide pile unit further includes a capping beam and a pile-to-pile panel. Multiple anti-slide piles are spaced apart along a first direction, with the first direction, the thickness direction of the shoulder retaining wall, and the gravity direction being perpendicular to each other. The capping beam sequentially connects the above-ground ends of the multiple anti-slide piles away from the underground portion. The pile-to-pile panel is located on the side of the anti-slide piles away from the shoulder retaining wall and connects adjacent anti-slide piles.

[0009] In the above technical solution, by setting multiple anti-slide piles and setting cap beams and pile panels, the shoulder retaining wall is supported along the first direction (i.e., the shoulder retaining wall) extension direction, thereby improving the overall reliability of the shoulder retaining wall.

[0010] In some embodiments, the anti-slide pile includes a first main reinforcement, a first stirrup, and a first positioning reinforcement. The first main reinforcement extends along the direction of gravity and is provided in multiple circumferentially spaced along the anti-slide pile. One end of the first main reinforcement is inserted into the capping beam. The first stirrup is wrapped around the first main reinforcement and is provided in multiple circumferentially spaced along the direction of gravity. The first positioning reinforcement is sequentially connected to the first main reinforcement and is provided in multiple circumferentially spaced along the direction of gravity. The pile panel includes a steel mesh, which is connected to the first stirrup and / or the first main reinforcement.

[0011] In the above technical solution, by connecting the steel mesh with at least one of the first stirrups and the first main reinforcement, it is beneficial to improve the connection strength between the pile panel and the first crossbeam. In particular, when the steel mesh is connected with both the first stirrups and the first main reinforcement, the connection strength between the pile panel and the anti-slide pile will be further improved, thereby improving the reliability of the retaining wall reinforcement structure.

[0012] In some embodiments, the anti-slide pile unit further includes a reinforcing beam. The reinforcing beam connects the above-ground portions of a plurality of anti-slide piles in sequence and is located at one end of the above-ground portion closer to the underground portion; one end of a locking anti-slide anchor rod is connected to the reinforcing beam, and the locking anti-slide anchor rods are a plurality of rods spaced apart along a first direction, with at least one locking anti-slide anchor rod provided between two adjacent anti-slide piles.

[0013] In the above technical solution, a reinforcing beam is set to further enhance the reliability of the above-ground connection of multiple anti-slide piles, while providing installation space for the locking foot anti-slide anchor rod.

[0014] In some embodiments, the reinforcing beam includes a second main bar and a second stirrup. The second main bar extends along a first direction and is a plurality of bars spaced apart along the circumference of the reinforcing beam. The second main bar is sequentially connected to at least one first main bar of two adjacent anti-slip piles. The second stirrup is wrapped around the second main bar and is a plurality of bars spaced apart along the first direction. The locking anti-slip anchor includes a first reinforcing bar, one end of which is connected to the second main bar and / or the second stirrup.

[0015] In the above technical solution, connecting the first reinforcing bar with at least one of the second stirrup and the second main reinforcement bar improves the connection strength between the anti-slip anchor rod and the reinforcing beam. Especially when the first reinforcing bar is connected to both the second stirrup and the main reinforcement bar, the connection strength between the anti-slip anchor rod and the reinforcing beam is further enhanced, thereby improving the reliability of the retaining wall reinforcement structure.

[0016] In some embodiments, the retaining wall reinforcement structure further includes a reinforcing soil nail, one end of which is connected to a steel mesh, and the other end of which passes through the infill reinforcement unit and is located within the shoulder retaining wall.

[0017] In the above technical solution, by setting up reinforcing soil nails, the connection strength between the shoulder retaining wall, the anti-slide pile unit, and the filling reinforcement unit is increased, thereby improving the stability of the shoulder retaining wall.

[0018] In some embodiments, at least one set of reinforcing soil nails is provided between two adjacent anti-slide piles, and each set of reinforcing soil nails consists of multiple nails spaced apart along the gravity direction.

[0019] In the above technical solution, by setting multiple sets of reinforced soil nails, the integrity of the shoulder retaining wall, anti-slide pile unit, and filling reinforcement unit is improved, further enhancing the stability of the shoulder retaining wall.

[0020] In some embodiments, the retaining wall reinforcement structure further includes a pull-out anchor unit, which includes a vertical pull-out anchor and a capping plate. One end of the capping plate is connected to the cap beam, and the other end of the capping plate extends along the thickness direction of the shoulder retaining wall and is located above the shoulder retaining wall and connected to it. One end of the vertical pull-out anchor is connected to the capping plate, and the other end of the vertical pull-out anchor extends along the gravity direction and is inserted into the shoulder retaining wall.

[0021] In the above technical solution, by setting up anti-pull-out anchor units and connecting one end of the anti-pull-out anchor units to the top pressure plate and the other end to the road shoulder retaining wall, the risk of slippage and overturning of the retaining wall reinforcement structure is reduced, and the reliability of the retaining wall reinforcement structure is improved.

[0022] In some embodiments, the capping plate includes a third main reinforcement and a third stirrup. The third main reinforcement extends along the thickness direction of the shoulder retaining wall and is provided in multiple circumferentially spaced along the capping plate. The first end of the third main reinforcement is inserted into the capping beam. The third stirrup is wrapped around the third main reinforcement and is provided in multiple circumferentially spaced along the thickness direction of the shoulder retaining wall. The vertical pull-out anchor includes a second reinforcing bar. There are two second reinforcing bars arranged in parallel. One end of the two second reinforcing bars is bent and located within the multiple third main reinforcements. The bending directions of the two second reinforcing bars are opposite.

[0023] In the above technical solution, by bending one end of the second reinforcing bar and placing it inside multiple third main reinforcing bars, and by having the two second reinforcing bars bend in opposite directions, the connection strength between the vertical pull-out anchor and the top pressure plate is increased, thereby improving the reliability of the retaining wall reinforcement structure.

[0024] In some embodiments, the vertical pull-out anchors are a plurality of those spaced apart along the thickness direction of the shoulder retaining wall, and the length of the vertical pull-out anchors within the shoulder retaining wall gradually increases along the slope side pointing towards the road side.

[0025] In the above technical solution, by gradually increasing the length of the vertical pull-out anchor rod located inside the shoulder retaining wall along the slope side pointing towards the road side, the connection strength between the vertical pull-out anchor rod away from the construction pit and the shoulder retaining wall is improved, thereby reducing the risk of stress concentration in the vertical pull-out anchor rod away from the construction pit. Attached Figure Description

[0026] 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.

[0027] Figure 1 A schematic diagram of the retaining wall reinforcement structure provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the retaining wall reinforcement structure provided in the embodiment of the present utility model in direction A;

[0029] Figure 3 This is a schematic diagram of the retaining wall reinforcement structure provided in the embodiment of the present utility model in the B direction;

[0030] Figure 4 This is a schematic diagram of the structure of the anti-slide pile unit and the anti-pull-out anchor unit provided in the embodiments of this utility model;

[0031] Figure 5A schematic diagram of the anti-slip anchor unit provided in this embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the soil nail reinforcement provided in an embodiment of the present invention. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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.

[0035] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Reference Figures 1-6This application provides a retaining wall reinforcement structure for reinforcing a road shoulder retaining wall 10. The road shoulder retaining wall 10 has a slope side 11 and a road side 12 arranged opposite to each other. The road side 12 has a culvert 12A. The slope side 11 has a construction pit. The retaining wall reinforcement structure includes an anti-slide pile unit 20, a filling reinforcement unit 60, and an anti-slide anchor unit 40. The anti-slide pile unit 20 is disposed on the slope side 11 of the road shoulder retaining wall 10. The anti-slide pile unit 20 includes an anti-slide pile 21 extending along the gravity direction Z. The anti-slide pile 21 includes an underground part 21B inserted into a first soil layer and an above-ground part 21A exposed in the construction pit. The first soil layer is located at the bottom of the slope of the construction pit. The filling reinforcement unit 60 is disposed between the above-ground part 21A and the road shoulder retaining wall 10, and the above-ground part 21A and the road shoulder retaining wall 10 are connected by the filling reinforcement unit 60. The anti-slip anchor unit 40 includes a locking anti-slip anchor 41. One end of the locking anti-slip anchor 41 is connected to the ground surface 21A, and the other end of the locking anti-slip anchor 41 extends in a direction that forms an angle with the gravity direction Z, and passes through the filling reinforcement unit 60 and the shoulder retaining wall 10 in sequence to be located in the base layer below the road. In the direction from the slope side 11 to the road side 12, the other end of the locking anti-slip anchor 41 extends beyond the culvert 12A and is located below the culvert 12A.

[0038] For example, the roadside 12 of the shoulder retaining wall 10 is a roadbed fill layer, the culvert 12A is located in the fill layer, the rock layer 12B is below the fill layer, and the bottom foundation of the shoulder retaining wall 10 is old clay and weathered bedrock.

[0039] Shoulder retaining wall 10 is a masonry retaining wall, with masonry types including grouted rubble masonry, grouted stone masonry, and rubble concrete; the structural forms of shoulder retaining wall 10 include gravity type and counterweight type; the form of the wall back (open side) includes inclined type, inclined type, or vertical type. There is a culvert 12A within the shoulder retaining wall 10 at a depth of 120.2m-2.0m on the road side.

[0040] For example, the anti-slide pile 21 includes an underground part 21B and an above-ground part 21A; the underground part 21B is circular, and the above-ground part 21A is circular or square, and the upper and lower parts are reinforced with the same reinforcement.

[0041] The filling reinforcement unit 60 is formed by pouring plain concrete or rubble concrete between the anti-slide pile 21 unit 20 and the shoulder retaining wall 10, thus connecting the anti-slide pile 21, the anti-slide anchor unit 40, and the shoulder retaining wall 10 into a whole. For example, the grade of the plain concrete used for filling is not lower than C25; if rubble concrete is used, the size of the rubble should not be greater than 1 / 3 of the minimum width of the poured part, and should not exceed 30 cm, and the admixture should not exceed 30%.

[0042] Anchor bolts are a type of tension member widely used in geotechnical and structural engineering. Their core function is to firmly connect structures or unstable soil and rock masses to deep, stable strata, resisting external loads by applying prestress, thereby achieving the purpose of stabilization and reinforcement.

[0043] In this technical solution, anti-slide piles 21 and filling reinforcement units 60 are used to reinforce the slope side 11 of the shoulder retaining wall 10. Simultaneously, locking anti-slide anchor rods 41 are installed to connect the anti-slide piles 21, filling reinforcement units 60, and shoulder retaining wall 10, improving the stability of the retaining wall and reducing the lateral pressure on the anti-slide piles 21. Furthermore, since one end of the locking anti-slide anchor rod 41 is connected to the ground surface 21A, adjusting the connection position allows the anchor rod 41 to be positioned below the culvert 12A, thus improving the stability of the shoulder retaining wall 10 while avoiding the culvert 12A. This reinforcement structure does not require the demolition of the existing shoulder retaining wall 10, has a relatively small width, minimal impact on the road and surrounding facilities, and allows for rapid construction.

[0044] According to some embodiments of this application, the anti-slide pile 21 unit 20 further includes a capping beam 22 and a pile-to-pile panel 23. Multiple anti-slide piles 21 are spaced apart along a first direction Y, where the first direction Y, the thickness direction X of the shoulder retaining wall 10, and the gravity direction Z are perpendicular to each other. The capping beam 22 sequentially connects the above-ground portion 21A of the multiple anti-slide piles 21 away from the underground portion 21B. The pile-to-pile panel 23 is located on the side of the anti-slide pile 21 away from the shoulder retaining wall 10 and connects adjacent anti-slide piles 21.

[0045] For example, the clear distance between the anti-slide piles 21 is not greater than the diameter of the anti-slide piles 21; the concrete strength of the pile body of the anti-slide piles 21 is not less than C35.

[0046] In some embodiments, a pile-to-pile panel 23 is provided between the anti-slide piles 21, and a drainage pipe 24 is pre-embedded on the pile-to-pile panel 23. The drainage pipe 24 extends into the backfill of the roadside 12 of the shoulder retaining wall 10.

[0047] In this technical solution, multiple anti-slide piles 21 are set up, along with a capping beam 22 and a pile-to-pile panel 23, to support the shoulder retaining wall 10 along the first direction Y (i.e., the shoulder retaining wall 10), thereby improving the overall reliability of the shoulder retaining wall 10.

[0048] According to some embodiments of this application, the anti-slide pile 21 includes a first main reinforcement 211, a first stirrup 212, and a first positioning reinforcement 213. The first main reinforcement 211 extends along the gravity direction Z and is provided in multiple circumferentially spaced along the anti-slide pile 21. One end of the first main reinforcement 211 is inserted into the capping beam 22. The first stirrup 212 is wrapped around the first main reinforcement 211 and is provided in multiple circumferentially spaced along the gravity direction Z. The first positioning reinforcement 213 is sequentially connected to the first main reinforcement 211 and is provided in multiple circumferentially spaced along the gravity direction Z. The pile panel 23 includes a steel mesh 231, which is connected to the first stirrup 212 and / or the first main reinforcement 211.

[0049] For example, the first main reinforcement 211 is made of HRB400 steel bar with a diameter of not less than 25mm; the first stirrup 212 and the first positioning reinforcement 213 are made of HPB300 steel bar with a diameter of not less than 10mm.

[0050] The diameter of the steel mesh 231 is not less than 10mm, and it is arranged in a single layer in both directions; the end of the drainage pipe 24 that extends into the backfill of the road shoulder retaining wall 10 and the roadside 12 is filtered with a mesh, and the length extending into the backfill is not less than 200mm.

[0051] In this technical solution, by connecting the steel mesh 231 to at least one of the first stirrup 212 and the first main reinforcement 211, it is beneficial to improve the connection strength between the pile panel 23 and the first crossbeam. In particular, when the steel mesh 231 is connected to both the first stirrup 212 and the first main reinforcement 211, the connection strength between the pile panel 23 and the anti-slide pile 21 will be further improved, thereby improving the reliability of the retaining wall reinforcement structure.

[0052] According to some embodiments of this application, the anti-slide pile 21 unit 20 further includes a reinforcing beam 42. The reinforcing beam 42 connects the above-ground parts 21A of a plurality of anti-slide piles 21 in sequence and is located at one end of the above-ground part 21A near the underground part 21B; one end of the locking foot anti-slide anchor rod 41 is connected to the reinforcing beam 42, and a plurality of locking foot anti-slide anchor rods 41 are spaced apart along the first direction Y, with at least one locking foot anti-slide anchor rod 41 provided between two adjacent anti-slide piles 21.

[0053] The anti-slip anchor 41 is located between two adjacent anti-slip piles 21. The anchor hole of the anti-slip anchor is inclined downward, forming a certain angle with both the horizontal direction and the gravity direction Z. The rod of the anti-slip anchor penetrates into the rock layer 12B below the backfill soil layer and meets the anchorage length requirements. Sufficient bending length is reserved at the end of the rod of the anti-slip anchor to connect with the reinforcing beam 42. The size and reinforcement of the reinforcing beam 42 can be consistent with the cap beam 22.

[0054] In this technical solution, the reliability of the connection between the above-ground parts 21A of multiple anti-slide piles 21 is further enhanced by setting a reinforcing beam 42, while providing installation space for the locking foot anti-slide anchor rod 41.

[0055] According to some embodiments of this application, the reinforcing beam 42 includes a second main reinforcement 421 and a second stirrup 422. The second main reinforcement 421 extends along the first direction Y and is provided in multiple circumferentially spaced along the reinforcing beam 42. The second main reinforcement 421 is sequentially connected to at least one first main reinforcement 211 of two adjacent anti-slip piles 21. The second stirrup 422 is wrapped around the second main reinforcement 421 and is provided in multiple circumferentially spaced along the first direction Y. The locking anti-slip anchor rod 41 includes a first reinforcing reinforcement 411, one end of which is connected to the second main reinforcement 421 and / or the second stirrup 422.

[0056] For example, the second main reinforcement 421 is HRB400 with a diameter d ≥ 22mm, double-layered and bidirectional, and the second stirrup 422 is a four-legged stirrup. The height of the capping beam 22 is not less than 0.8 times the diameter of the anti-slide pile 21, and the width of the capping beam 22 should preferably exceed the anti-slide pile 21 by not less than 100mm.

[0057] In this technical solution, connecting the first reinforcing bar 411 with at least one of the second stirrup 422 and the second main bar 421 improves the connection strength between the anti-slip anchor rod 41 and the reinforcing beam 42. Especially when the first reinforcing bar 411 is connected to both the second stirrup 422 and the second main bar, the connection strength between the anti-slip anchor rod 41 and the reinforcing beam 42 is further enhanced, thereby improving the reliability of the retaining wall reinforcement structure.

[0058] According to some embodiments of this application, the retaining wall reinforcement structure also includes a reinforcing soil nail 50, one end of which is connected to the steel mesh 231, and the other end of which passes through the filling reinforcement unit 60 and is located inside the shoulder retaining wall 10.

[0059] The drilling depth of the reinforcing soil nail 50 is determined by penetrating the wall body of the shoulder retaining wall 10; the drilling direction of the reinforcing soil nail 50 is horizontal or slightly downward inclined; the reinforcing soil nail 50 (reinforcing bar) is inserted, and sufficient end length is reserved for binding and lapping with the reinforcing mesh 231. High-pressure grouting is performed along the entire length of the drilled hole in the shoulder retaining wall 10 to form a high-pressure grouting reinforced body. For example, the diameter of the grouting hole is not less than 100 mm, the grouting material is 425 ordinary Portland cement, and the grouting pressure is not less than 1.5 MPa.

[0060] In this technical solution, by setting up reinforcing soil nails 50, the connection strength between the shoulder retaining wall 10, the anti-slide pile 21 unit 20, and the filling reinforcement unit 60 is increased, thereby improving the stability of the shoulder retaining wall 10.

[0061] According to some embodiments of this application, at least one set of reinforcing soil nails 50 is provided between two adjacent anti-slide piles 21, and each set of reinforcing soil nails 50 consists of multiple nails spaced apart along the gravity direction Z.

[0062] For example, the soil nail 50 is located between two adjacent anti-slide piles 21. The distance between two adjacent soil nails 50 in the first direction Y is equal to the distance between two adjacent anti-slide piles 21 in the first direction Y. The distance between two adjacent soil nails 50 in the gravity direction Z is about 1.0m.

[0063] In this technical solution, by setting multiple sets of reinforced soil nails 50, the integrity of the shoulder retaining wall 10, the anti-slide pile 21 unit 20, and the filling reinforcement unit 60 are improved, further enhancing the stability of the shoulder retaining wall 10.

[0064] According to some embodiments of this application, the retaining wall reinforcement structure further includes an anti-pull-out anchor unit 30, which includes a vertical anti-pull-out anchor 31 and a capping plate 32. One end of the capping plate 32 is connected to the cap beam 22, and the other end of the capping plate 32 extends along the thickness direction X of the shoulder retaining wall 10 and is located above the shoulder retaining wall 10 and connected to the shoulder retaining wall 10. One end of the vertical anti-pull-out anchor 31 is connected to the capping plate 32, and the other end of the vertical anti-pull-out anchor 31 extends along the gravity direction Z and is inserted into the shoulder retaining wall 10.

[0065] Understandably, the vertical tension anchors 31 should be arranged in 1-2 rows along the thickness direction X, and the spacing of the vertical tension anchors 31 should be consistent with the center distance between the vertical tension anchors 31 and the anti-slide piles 21, so as to avoid the group anchor effect.

[0066] For example, mechanical drilling is used to construct vertical pull-out anchors 31 at the top of the road retaining wall; the vertical pull-out anchor 31 closest to the road side 12 penetrates 5m into the bedrock below the shoulder retaining wall 10, and the vertical pull-out anchor 31 closest to the slope side 11 penetrates 3m into the bedrock below the shoulder retaining wall 10, both of which meet the minimum anchorage length requirements.

[0067] Vertical pull-out anchor bolts 31 should preferably be double-core or triple-core full-length anchor bolts, with a drilled hole diameter of not less than 130mm, and bonded along the entire length with M30 cement mortar. The spacing between rows of vertical pull-out anchor bolts 31 should not be less than 1.5m, and the bottom depth of adjacent rows of anchor bolts should be staggered by not less than 2m.

[0068] In this technical solution, by setting up anti-pull-out anchor units 30 and connecting one end of the anti-pull-out anchor units 30 to the top pressure plate and the other end to the road shoulder retaining wall 10, the risk of slippage and overturning of the retaining wall reinforcement structure is reduced, and the reliability of the retaining wall reinforcement structure is improved.

[0069] According to some embodiments of this application, the capping plate 32 includes a third main reinforcement 321 and a third stirrup 322. The third main reinforcement 321 extends along the thickness direction X of the shoulder retaining wall 10 and is provided in multiple circumferentially spaced along the capping plate 32. The first end of the third main reinforcement 321 is inserted into the capping beam 22. The third stirrup 322 is wrapped around the third main reinforcement 321 and is provided in multiple circumferentially spaced along the thickness direction X of the shoulder retaining wall 10. The vertical pull-out anchor rod 31 includes a second reinforcing rib 311. There are two second reinforcing ribs 311 arranged in parallel. One end of the two second reinforcing ribs 311 is bent and located within the multiple third main reinforcements 321. The bending directions of the two second reinforcing ribs 311 are opposite.

[0070] For example, the third main reinforcement 321 is made of HRB400 with a diameter d≥16mm, double-layered and bidirectional, and the third stirrup 322 is a four-legged stirrup; at the lap joint between the third main reinforcement 321 and the vertical tension anchor 31, a bent-up lifting bar is provided, bent up at 45° on both sides, and the bent-up lifting bar extends beyond the bending length of the vertical tension anchor 31 by ≥400mm.

[0071] In this technical solution, by bending one end of the second reinforcing rib 311 and placing it within a plurality of third main reinforcing ribs 321, with the bending directions of the two second reinforcing ribs 311 being opposite, the connection strength between the vertical pull-out anchor rod 31 and the top pressure plate is increased, thereby improving the reliability of the retaining wall reinforcement structure.

[0072] According to some embodiments of this application, the vertical pull-out anchor rods 31 are multiple ones spaced apart along the thickness direction X of the shoulder retaining wall 10, and the length of the vertical pull-out anchor rods 31 inside the shoulder retaining wall 10 gradually increases along the direction from the slope side 11 to the road side 12.

[0073] In this technical solution, by gradually increasing the length of the vertical pull-out anchor 31 located within the shoulder retaining wall 10 along the direction from the slope side 11 to the road side 12, the connection strength between the vertical pull-out anchor 31 and the shoulder retaining wall 10 away from the construction pit is improved, thereby reducing the risk of stress concentration in the vertical pull-out anchor 31 away from the construction pit.

[0074] It should be noted that the first main reinforcement 211, the first stirrup 212, the first positioning reinforcement 213, the second main reinforcement 421, the second stirrup 422, the third main reinforcement 321, the third stirrup 322, the steel mesh 231, the first reinforcing reinforcement 411, and the second reinforcing reinforcement 311 are all surrounded by a cement portion encasing the aforementioned structure via grouting. It should also be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0075] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A retaining wall reinforcement structure for reinforcing a road shoulder retaining wall, the road shoulder retaining wall having a slope side and a road side arranged opposite each other, the road side having a culvert, and the slope side having a construction pit, characterized in that... The retaining wall reinforcement structure includes: An anti-slide pile unit is provided on the slope side of the shoulder retaining wall. The anti-slide pile unit includes anti-slide piles that extend along the gravity direction. The anti-slide piles include an underground part inserted into a first soil layer and an above-ground part exposed in the construction pit. The first soil layer is located at the bottom of the slope of the construction pit. A filling and reinforcement unit is disposed between the above-ground part and the shoulder retaining wall, and the above-ground part and the shoulder retaining wall are connected through the filling and reinforcement unit; The anti-slip anchor unit includes a locking anti-slip anchor, one end of which is connected to the ground surface, and the other end of which extends in a direction at an angle to the direction of gravity and passes through the filling reinforcement unit and the shoulder retaining wall in sequence to be located in the base layer below the road. Wherein, along the slope side pointing towards the road side, the other end of the locking foot anti-slip anchor extends beyond the culvert, and the other end of the locking foot anti-slip anchor is located below the culvert.

2. The retaining wall reinforcement structure according to claim 1, characterized in that, The anti-slide pile unit also includes: The cap beam consists of multiple anti-slide piles spaced apart along a first direction, where the first direction, the thickness direction of the shoulder retaining wall, and the gravity direction are perpendicular to each other. The cap beam sequentially connects the above-ground ends of the multiple anti-slide piles away from the underground parts. The pile-to-pile panel is located on the side of the anti-slide pile away from the shoulder retaining wall and connects two adjacent anti-slide piles.

3. The retaining wall reinforcement structure according to claim 2, characterized in that, The anti-slide pile includes a first main reinforcement, a first stirrup, and a first positioning reinforcement. The first main reinforcement extends along the direction of gravity and is provided in multiple circumferentially spaced along the anti-slide pile. One end of the first main reinforcement is inserted into the capping beam. The first stirrup is wrapped around the first main reinforcement and is provided in multiple circumferentially spaced along the direction of gravity. The first positioning reinforcement is connected to the first main reinforcement in sequence and is provided in multiple circumferentially spaced along the direction of gravity. The pile-to-pile panel includes a steel mesh, which is connected to the first stirrup and / or the first main reinforcement.

4. The retaining wall reinforcement structure according to claim 3, characterized in that, The anti-slide pile unit also includes: A reinforcing beam is provided, which sequentially connects the above-ground parts of multiple anti-slide piles and is located at one end of the above-ground part near the underground part. One end of the anti-slip anchor rod is connected to the reinforcing beam. The anti-slip anchor rods are multiple rods spaced apart along the first direction, and at least one anti-slip anchor rod is provided between two adjacent anti-slip piles.

5. The retaining wall reinforcement structure according to claim 4, characterized in that, The reinforcing beam includes a second main bar and a second stirrup. The second main bar extends along the first direction and is a plurality of bars spaced apart along the circumference of the reinforcing beam. The second main bar is sequentially connected to at least one first main bar of two adjacent anti-slide piles. The second stirrup is wrapped around the second main bar and is a plurality of bars spaced apart along the first direction. The anti-slip anchor rod includes a first reinforcing bar, one end of which is connected to the second main bar and / or the second stirrup.

6. The retaining wall reinforcement structure according to claim 3, characterized in that, The retaining wall reinforcement structure also includes reinforcing soil nails, one end of which is connected to the steel mesh, and the other end of which passes through the filling reinforcement unit and is located inside the shoulder retaining wall.

7. The retaining wall reinforcement structure according to claim 6, characterized in that, At least one set of the reinforcing soil nails is provided between two adjacent anti-slide piles, and each set of the reinforcing soil nails consists of multiple nails spaced apart along the direction of gravity.

8. The retaining wall reinforcement structure according to claim 3, characterized in that, The retaining wall reinforcement structure also includes an anti-pull-out anchor unit, which includes a vertical anti-pull-out anchor and a capping plate. One end of the capping plate is connected to the cap beam, and the other end of the capping plate extends along the thickness direction of the shoulder retaining wall and is located above the shoulder retaining wall and connected to the shoulder retaining wall. One end of the vertical pull-out anchor is connected to the capping plate, and the other end of the vertical pull-out anchor extends along the direction of gravity and is inserted into the shoulder retaining wall.

9. The retaining wall reinforcement structure according to claim 8, characterized in that, The capping plate includes a third main reinforcement and a third stirrup. The third main reinforcement extends along the thickness direction of the shoulder retaining wall and is provided in multiple circumferentially spaced along the capping plate. The first end of the third main reinforcement is inserted into the capping beam. The third stirrup is wrapped around the third main reinforcement and is provided in multiple circumferentially spaced along the thickness direction of the shoulder retaining wall. The vertical pull-out anchor includes two second reinforcing bars arranged in parallel. One end of each second reinforcing bar is bent and located within one of the third main reinforcing bars. The bending directions of the two second reinforcing bars are opposite.

10. The retaining wall reinforcement structure according to claim 8, characterized in that, The vertical pull-out anchors are multiple anchors spaced apart along the thickness direction of the shoulder retaining wall, pointing from the slope side to the road side, and the length of the vertical pull-out anchors within the shoulder retaining wall gradually increases.

Images