Anti-scouring retaining wall and gabion combined structure

Abstract

The utility model relates to an anti-scouring retaining wall and gabion combined structure which comprises inverted filter bags, a retaining wall body, a retaining wall foundation and gabions, side slope excavation lines are arranged on two sides of a river channel, retaining wall foundation grooves are excavated along the side slope excavation lines, a first foundation broken stone hardcore is laid on the horizontal plane of each retaining wall foundation groove, and a second foundation broken stone hardcore is laid on the horizontal plane of each first foundation broken stone hardcore. The retaining wall foundation is built on the top of the first foundation broken stone hardcore, the retaining wall body is built on the top of the retaining wall foundation, gabion foundation grooves are excavated in the two sides of a river channel along the retaining wall foundation, second foundation broken stone hardcores are laid on the horizontal planes of the gabion foundation grooves, and gabions are laid on the tops of the second foundation broken stone hardcores. According to the utility model, the burial depth of the retaining wall foundation is reduced, the dead weight of the retaining wall is reduced, the structure is simple and reasonable, and the construction difficulty is further reduced; and the gabion is laid on the upstream side of the retaining wall foundation, so that the flood washing damage resistance of the retaining wall foundation is improved, and the overall structure has better economical efficiency and safety.

Description

Technical Field

[0001] The utility model relates to the technical field of river channel regulation, in particular to a combined structure of an anti-scour retaining wall and a gabion stone cage. Background Art

[0002] In recent years, floods have become more frequent due to extreme weather. In order to protect the villages, roads and farmland on both sides of the river from being eroded and damaged by floods, it is often necessary to protect both sides of the river. The general protective structure mainly includes gravity retaining wall protection or slope protection, and its protective materials are often mortar masonry, gabion stone cages and buried stone concrete. Due to the extremely strong instantaneous scouring force of floods, it is very easy to cause scouring and hollowing damage to the retaining wall foundation, causing its protective structure to deform and crack, and even collapse, thereby causing damage to the villages, roads and farmland on both sides of the river, causing loss of life and property. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and provides a combined structure of an anti-scour retaining wall and a gabion stone cage.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a combined structure of an anti-scouring retaining wall and a gabion stone cage, including an anti-filter bag, a retaining wall body, a retaining wall foundation, and a gabion stone cage. Slope excavation lines are set on both sides of the river channel, and retaining wall foundation grooves are excavated along the slope excavation lines. A first foundation crushed stone cushion layer is laid on the horizontal surface of the retaining wall foundation groove. The retaining wall foundation is built on the top of the first foundation crushed stone cushion layer. The retaining wall body is built on the top of the retaining wall foundation. A plurality of settlement joints are arranged at intervals between the retaining wall foundation and the retaining wall body. The settlement joints are filled with high-density polyethylene closed-cell foam boards. The water-facing surfaces of the settlement joints are provided with useful A plurality of drainage pipes are provided on the retaining wall at intervals, a filter bag is arranged on the back water surface of the retaining wall, and the inlet end of the drainage pipe is inserted into the filter bag. The inclined surface of the retaining wall foundation groove and the gaps between the retaining wall body and the retaining wall foundation are filled with backfill soil layer. Gabion gabion foundation grooves are excavated along the retaining wall foundation on both sides of the river channel, a second foundation crushed stone cushion layer is laid on the horizontal surface of the gabion gabion foundation groove, the gabion gabion is laid on the top of the second foundation crushed stone cushion layer, and the gap between the gabion gabion foundation groove and the gabion gabion is filled with a gravel layer, and the top of the gravel layer is flush with the top of the retaining wall foundation.

[0005] In particular, the anti-filtration bag comprises a geotextile outer layer, which is arranged on the back of the retaining wall and filled with crushed stone filter material. The inlet end of the drainage pipe is provided with a geotextile wrapping layer.

[0006] In particular, the back facade of the retaining wall is vertical, and the outer facade is 1:0.4 sloped.

[0007] In particular, the distance between two adjacent settlement joints is 10m.

[0008] The beneficial effects of the utility model are as follows: the utility model reduces the buried depth of the retaining wall foundation and reduces the deadweight of the retaining wall itself through the combined structure of the retaining wall and the gabion stone cage, making the structure simple and reasonable, and further reducing the construction difficulty; by laying the gabion stone cage on the water-facing side of the retaining wall foundation, the ability of the retaining wall foundation to resist flood scouring and damage is increased, and the overall structure has better economy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the anti-filter bag of the utility model;

[0011] Figure 3 It is a schematic diagram of the position of the settlement joint and the high-density polyethylene closed-cell foam board of the utility model;

[0012] In the figure: 1-anti-filter bag; 2-slope excavation line; 3-backfill soil layer; 4-retaining wall; 5-drainage pipe; 6-sand and gravel layer; 7-gabion stone cage; 8-first foundation gravel cushion layer; 9-retaining wall foundation; 10-settlement joint; 11-high-density polyethylene closed-cell foam board; 12-second foundation gravel cushion layer; 13-geotextile outer layer; 14-gravel filter material; 15-geotextile wrapping layer;

[0013] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] like Figure 1-Figure 3 As shown, an anti-scour retaining wall and gabion stone cage combination structure includes an anti-filter bag 1, a retaining wall body 4, a retaining wall foundation 9, and a gabion stone cage 7. Slope excavation lines 2 are set on both sides of the river channel, and retaining wall foundation trenches are excavated along the slope excavation lines 2. A first foundation crushed stone cushion layer 8 is laid on the horizontal surface of the retaining wall foundation trench; specifically, after the retaining wall foundation trench is accepted, a 100mm thick first foundation crushed stone cushion layer 8 is laid manually by mechanical means. Each side of the first foundation crushed stone cushion layer 8 should exceed the foundation size by 100mm. The first foundation crushed stone cushion layer 8 should be laid flat, and the particle size should meet the requirements of the specifications. The first foundation crushed stone cushion layer 8 can effectively improve the foundation quality, reduce water accumulation, reduce foundation settlement, and ensure the structural safety of the building.

[0016] The retaining wall foundation 9 is built on the top of the first foundation gravel cushion layer 8, and the retaining wall body 4 is built on the top of the retaining wall foundation 9. The back facade of the retaining wall body 4 is upright, and the outer facade is 1:0.4 sloped to reduce the land occupation of the opposite slope. A number of settlement joints 10 are arranged on the retaining wall foundation 9 and the retaining wall body 4. The distance between two adjacent settlement joints 10 is 10m. The settlement joints 10 are filled with high-density polyethylene closed-cell foam boards 11 to reduce the uneven settlement caused by the excessive length of the retaining wall. The water-facing surface of the settlement joints 10 is provided with an asphalt mortar layer for sealing. Specifically, the retaining wall is built in layers by the mortar sitting method, and the mortar masonry adopts M7.5 cement mortar. MU40 block stone, the block stone thickness is not less than 20cm, the mortar thickness should be 3-5cm, and it should be laid as it is laid. Each layer should be laid with corner stones, face stones, and then belly stones in turn; choose relatively flat large blocks and use them as face stones after trimming. The exposed surface should be flat and beautiful. The upper and lower layers of blocks should be staggered, and the inner and outer blocks should be overlapped alternately; the masonry joints should be filled with mortar and compacted; the masonry should rise evenly, and the masonry height difference and daily masonry height of adjacent sections should not exceed 1.2m; a 20mm wide settlement joint 10 is set every 10m of the retaining wall, and the high-density polyethylene closed-cell foam board 11 is filled in the joint, and the water-facing surface of the settlement joint 10 of the retaining wall is sealed with 20mm asphalt mortar.

[0017] A plurality of drainage pipes 5 are provided at intervals on the retaining wall body 4, the filter bag 1 is arranged on the back side of the retaining wall body 4, and the inlet end of the drainage pipe 5 passes through the filter bag 1, the filter bag 1 includes a geotextile outer layer 13, the geotextile outer layer 13 is arranged on the back side of the retaining wall body 4, and the geotextile outer layer 13 is filled with crushed stone filter material 14, and the inlet end of the drainage pipe 5 is provided with a geotextile wrapping layer 15 to prevent the inlet end from being clogging; specifically, the filter bag 1 is arranged to timely remove the water on the back of the wall.

[0018] The gaps between the slope of the retaining wall foundation trench and the retaining wall body 4 and the retaining wall foundation 9 are filled with backfill soil layer 3. Specifically, after the wall masonry is completed and reaches 75% of the design strength, the backfill of the retaining wall is carried out. The backfill material of the wall should meet the design requirements. The backfill should be filled and compacted in layers. During the compaction process, care should be taken not to allow the wall body and the position of the anti-filter bag 1 to be affected by a large impact. The thickness of each layer of soil should be controlled between 15cm and 20cm. Steps should be dug at the joints of the segmented backfill. The width of the steps should not be less than 1m, the height should not be more than 0.5m, and they should be fully compacted.

[0019] Gabion stone cage foundation trenches are excavated along the retaining wall foundation 9 on both sides of the river channel. A second foundation gravel cushion layer 12 is laid on the horizontal surface of the gabion stone cage foundation trench. The thickness of the second foundation gravel cushion layer 12 is 100 mm. The second foundation gravel cushion layer 12 can effectively improve the foundation quality, reduce water accumulation, reduce foundation settlement, and ensure the structural safety of the building.

[0020] Gabion gabion cage 7 is laid on the top of the second foundation gravel cushion layer 12. Specifically, the gabion gabion cage 7 is 4m wide and 0.5m high. The gabion is filled with stones. The material is a hexagonal mesh made of high-galvanized low-carbon steel wire coated with PVC. The size of the gabion gabion cage 7 is 1.0m×1.0m×0.5m, and the mesh specification is 90mm×90mm. The gabion spacer mesh intersects the mesh body at 90° and is tied into a rectangular mesh box. The wire is made of the same material as the mesh cable, and the mesh boxes are tied with double wires. The spacing between ties should not be greater than 200mm. The ties should be firm and tightened 2-3 times after wrapping. During the construction of gabion box filling, materials should be added evenly and simultaneously into multiple boxes on the same layer. The filling materials should be hard, non-weathering, non-hydrolyzed pebbles or blocks. The filling materials should be 30mm-50mm higher than the structure and should be densely filled. The median particle size of the stone in the gabion should be between 1.5D and 2.0D, and the minimum particle size should not be less than the mesh diameter. The porosity of the stone filling should be less than 30%.

[0021] The gap between the gabion gabion foundation groove and the gabion gabion 7 is filled with a gravel layer 6. The top of the gravel layer 6 is flush with the top of the retaining wall foundation 9. The retaining wall foundation 9 is buried at a depth of 1m. The retaining wall foundation 9 and the gabion gabion 7 foundation are located in the same plane. The protection of the retaining wall foundation 9 by the gabion gabion 7 can effectively reduce the burial depth of the retaining wall foundation 9, thereby reducing the overall height and structural size of the retaining wall, and effectively reducing the requirements for the bearing capacity of the foundation. The gabion gabion 7 is backfilled with 0.5m thick gravel to jointly protect the retaining wall foundation 9 from being destroyed by flood erosion.

[0022] The utility model optimizes the protective structure on both sides of the river channel under the condition that the river channel is often damaged by flood scouring, and adopts a structure combined with a retaining wall and a gabion stone cage 7, that is, by building upright retaining walls on both sides of the river channel, laying a certain width of gabion stone cage 7 on the water-facing side of the retaining wall foundation 9, and filling the gabion stone cage 7 with gravel, so that the gabion stone cage 7 is more compact and stable, and the retaining wall foundation 9 is protected from being damaged by flood scouring by the gabion stone cage 7. The foundation of the gabion stone cage 7 and the retaining wall foundation 9 are located in the same plane, which can effectively reduce the buried depth of the retaining wall foundation 9, thereby reducing the overall height and deadweight of the retaining wall, reducing the requirements for the bearing capacity of the foundation and the damage caused by the excessive deadweight of the retaining wall.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A combined structure of an anti-scour retaining wall and a gabion stone cage, characterized in that: The invention comprises an anti-filtration bag (1), a retaining wall body (4), a retaining wall foundation (9), and a gabion stone cage (7). Slope excavation lines (2) are set on both sides of a river channel, and a retaining wall foundation groove is excavated along the slope excavation lines (2). A first foundation gravel cushion layer (8) is laid on the horizontal surface of the retaining wall foundation groove. The retaining wall foundation (9) is built on the top of the first foundation gravel cushion layer (8). The retaining wall body (4) is built on the top of the retaining wall foundation (9). A plurality of settlement joints (10) are arranged at intervals on the retaining wall foundation (9) and the retaining wall body (4). The settlement joints (10) are filled with high-density polyethylene closed-cell foam boards (11). An asphalt mortar layer for sealing is arranged on the water-facing surface of the settlement joints (10). A plurality of drainage pipes (5) are provided to penetrate the grooves. The filter bag (1) is arranged on the back surface of the retaining wall body (4), and the inlet end of the drainage pipe (5) is inserted into the filter bag (1). The gaps between the inclined surface of the retaining wall foundation groove and the retaining wall body (4) and the retaining wall foundation (9) are filled with a backfill soil layer (3). Gabion gabion foundation grooves are excavated along the retaining wall foundation (9) on both sides of the river channel. A second foundation crushed stone cushion layer (12) is laid on the horizontal surface of the gabion gabion foundation groove. The gabion gabion (7) is laid on the top of the second foundation crushed stone cushion layer (12). The gap between the gabion gabion foundation groove and the gabion gabion (7) is filled with a gravel layer (6). The top of the gravel layer (6) is flush with the top of the retaining wall foundation (9).

2. The anti-scour retaining wall and gabion stone cage combined structure according to claim 1 is characterized in that: The anti-filtration bag (1) comprises a geotextile outer layer (13), which is arranged on the back of the retaining wall body (4) and filled with crushed stone filter material (14). The inlet end of the drainage pipe (5) is provided with a geotextile wrapping layer (15).

3. The anti-scour retaining wall and gabion stone cage combined structure according to claim 1 is characterized in that: The rear facade of the retaining wall (4) is upright, and the outer facade is 1:0.4 sloped.

4. The anti-scour retaining wall and gabion stone cage combined structure according to claim 1, characterized in that: The distance between two adjacent settlement joints (10) is 10 m.

Images