Light retaining structure suitable for rock high and steep slope roadbed

Abstract

The utility model discloses a light retaining structure suitable for a rock high and steep slope roadbed, the light retaining structure comprises a light surface protecting wall and light foam soil, the light foam soil is used for being arranged at a steep slope of a slope surface, and the light surface protecting wall is arranged on one side, far away from the slope surface, of the light foam soil; the top of the light foam soil is flush with the top of the excavated slope surface, and a roadbed is arranged between the top of the light foam soil and the top of the excavated slope surface; the light face protecting wall is provided with a first stabilizing assembly used for stabilizing the light foam soil to the light face protecting wall. According to the method, the engineering scale is reduced, and the excavation difficulty of the abrupt slope road section is reduced; meanwhile, the requirement for bearing capacity of a roadbed foundation is lowered, and steep mountains can be better adapted.

Description

Technical Field

[0001] The invention relates to the field of steep slope retaining, and in particular to a light retaining structure suitable for rocky high and steep slope roadbed. Background Art

[0002] Highway construction passing through mountainous canyon areas, especially steep slope sections, often faces difficulties in natural slope filling of embankments, and requires the establishment of retaining structures. Traditional embankment retaining structures generally use large-volume masonry structures such as gravity retaining walls.

[0003] The common construction method of gravity retaining wall is to set up formwork on the back and wall surface, and then pour concrete. After pouring to the appropriate height, it is necessary to backfill the filter layer on the back of the wall to play a supporting role. The entire wall needs to be poured with concrete and backfilled with filter layer multiple times to form a stable retaining wall.

[0004] Regarding the above-mentioned related technologies, the use of gravity retaining walls as supporting structures is difficult, has high requirements for foundation bearing capacity, has a large scale of supporting structure projects, is difficult to implement, and has low economic benefits, which contradicts the green ecological development concept advocated today. Summary of the invention

[0005] In order to solve the above problems, the present application provides a light retaining structure suitable for rocky high and steep slope roadbed.

[0006] The present application provides a lightweight retaining structure suitable for rocky high and steep slope roadbed, which adopts the following technical solutions:

[0007] A lightweight retaining structure suitable for rocky high and steep slope roadbed, comprising a lightweight retaining wall and lightweight foam soil; the lightweight foam soil is used to be set at the steep slope of the slope, and the lightweight retaining wall is set on the side of the lightweight foam soil away from the slope; the top of the lightweight foam soil is flush with the top of the slope after excavation, and the top of the lightweight foam soil and the top of the slope after excavation are provided with a roadbed; the lightweight retaining wall is provided with a first stabilizing component for stabilizing the lightweight foam soil on the lightweight retaining wall.

[0008] By adopting the above technical solution, light facing walls and foam soil are used to replace traditional large-volume masonry solutions such as gravity retaining wall anti-slide piles, thereby reducing the number of masonry protections of the roadbed support structure, reducing the scale of the project, saving project costs, and reducing the difficulty of workers in construction on steep slopes; at the same time, lightweight foam soil is used to fill the roadbed, which is more than half lighter than conventional sand and gravel and crushed stone soil, reducing the overall dead weight of the support structure, having better self-stabilization ability, and reducing the bearing capacity requirements of the roadbed foundation, so that the roadbed can better adapt to steep mountain terrain conditions.

[0009] Preferably, the first stabilizing component includes an anchor rod and a grouting pipe; the grouting pipe is used to fill concrete, the grouting pipe is passed through the lightweight retaining wall, the lightweight foam soil and the slope, and the anchor rod is installed in the grouting pipe; one end of the anchor rod passing through the grouting pipe is buried in the slope.

[0010] By adopting the above technical solution, after drilling anchor holes on the retaining wall, the grouting pipe is inserted into the anchor hole and the anchor cable is inserted into the grouting pipe. After concrete is injected into the grouting pipe, the anchor cable can be firmly fixed on the slope surface, thereby fixing the lightweight retaining wall and the slope surface relatively, and fixing the lightweight foam soil between the two, thereby forming a stable support for the roadbed; this fixing method has a simple structure and is easy to construct.

[0011] Preferably, drainage grooves are provided on both sides of the roadbed along its length direction.

[0012] By adopting the above technical solution, when there is thunderstorm, rainwater can be drained out through the drainage ditch, reducing the erosion of the slope by rainwater, thereby reducing the risk of slope collapse.

[0013] Preferably, the first stabilizing component is located at the bottom of the lightweight retaining wall, and a second stabilizing component for stabilizing the lightweight foam soil between the lightweight retaining wall and the slope is provided at the top of the lightweight retaining wall.

[0014] By adopting the above technical solution, anchor rods are set at the bottom of the retaining wall. When constructing a higher slope, anchor rods are first driven into the bottom of the retaining wall to initially stabilize the lightweight retaining wall. Then, a second stabilizing component is used to further fix the lightweight foam soil at a position convenient for construction on the top of the lightweight retaining wall, thereby enhancing the stability of the foam soil between the lightweight retaining wall and the slope.

[0015] Preferably, the second stabilizing component includes a first stabilizing block, a second stabilizing block and a connecting steel cable, the first stabilizing block is arranged in the slope surface, the second stabilizing block is fixed in the lightweight protective wall, the connecting steel cable is buried in the lightweight foam soil and the two ends of the connecting steel cable are respectively fixedly connected to the two stabilizing blocks.

[0016] By adopting the above technical solution, when using the second stabilizing component, it is only necessary to place the first stabilizing block in the excavated slope, and then use the connecting steel cable to connect the first stabilizing block and the second stabilizing block, and tighten the connecting steel cable to connect the lightweight protective wall and the slope. This connection method only requires burying the first stabilizing block in the slope after excavating the slope and then using the connecting steel cable to connect the two connecting blocks. Compared with the use of anchor rods to construct on a lightweight protective wall with a higher height, this stabilizing method is convenient for construction.

[0017] Preferably, a plurality of pairs of rotation grooves are provided on the first stabilizing block, and a plurality of pairs of arc plates are rotatably mounted on the first stabilizing block along the vertical direction through the rotation grooves, and the two arc plates of the same pair rotate in a direction away from each other; when the two arc plates of the same pair rotate, each arc plate protrudes from the first stabilizing block and is inserted into the earth on the slope; the second stabilizing component also includes a driving member for driving the arc plates to rotate in the first stabilizing block.

[0018] By adopting the above technical solution, when the first stabilizing block is buried deeper in the slope, the driving member is started to drive the arc plate to extend from the rotating groove, thereby abutting against the earth on the surrounding side. The lightweight retaining wall tends to tilt away from the slope under the action of its own gravity. The reaction force of the earth on the surrounding side forms a support for the lightweight retaining wall, thereby further strengthening the role of the second stabilizing component.

[0019] Preferably, the driving member includes a pull rope and several pairs of gears, a rack is provided on the outer arc surface of the arc plate, and the several pairs of gears are rotatably mounted on the first stabilizing block, the two gears of each pair correspond to the racks on the two arc plates of each pair, the gears are meshed with the corresponding racks, and the two gears of the same pair are meshed with each other; one end of the pull rope is wound around the rotating shaft of one of the gears, and the other end is passed through the lightweight foam soil and the lightweight retaining wall.

[0020] By adopting the above technical solution, it is only necessary to pull the pull rope to drive the gear to rotate, and the arc plate can be driven to rotate through the linkage of the rack. This driving method has a simple structure and is easy for workers to operate.

[0021] Preferably, an arc-shaped elastic block is arranged on the inner arc surface of the arc plate, and the first stabilizing block is provided with a locking groove at the groove wall of the rotating groove. When the arc-shaped block is rotated and penetrated into the earth on the slope, the elastic block is inserted into the first stabilizing block through the locking groove.

[0022] By adopting the above technical solution, when the worker pulls the pull rope to drive the arc plate to extend out of the first stabilizing block, the elastic block is inserted into the locking groove to lock the arc plate, and multiple pairs of arc plates work together to improve the stability of the first stabilizing block.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The use of lightweight facing walls and foam soil to replace traditional large-volume masonry solutions such as gravity retaining wall anti-slide piles reduces the number of masonry protections for the roadbed support structure, reduces the scale of the project, saves project costs, and reduces the difficulty of workers in steep slope construction; at the same time, lightweight foam soil is used to fill the roadbed, which is more than half lighter than conventional sand and gravel soil, reducing the overall deadweight of the support structure, has better self-stabilization ability, reduces the bearing capacity requirements of the roadbed foundation, and makes the roadbed better adapt to steep mountain terrain conditions.

[0025] After excavating the slope, the first stabilizing block is buried in the slope and then the two connecting blocks are connected using connecting steel cables to form a stable connection between the lightweight protective wall and the slope. Compared with the use of anchor rods to construct on a lightweight protective wall with a higher height, this stabilizing method is convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the lightweight retaining structure of an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of the first stabilizing block of the embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Slope; 2. Lightweight facing wall; 3. Lightweight foam soil; 4. Roadbed; 41. Drainage ditch; 5. First stabilizing component; 51. Anchor rod; 52. Grouting pipe; 6. Second stabilizing component; 61. First stabilizing block; 611. Arc plate; 62. Second stabilizing block; 63. Connecting steel cable; 71. Pull rope; 72. Gear; 73. Elastic block. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application discloses a lightweight retaining structure suitable for rocky high and steep slope roadbed. Figure 1 A lightweight retaining structure suitable for a rocky high and steep slope roadbed 4 includes a lightweight retaining wall 2 and a lightweight foam soil 3. The lightweight foam soil 3 is used to be set at the steep slope of the slope 1. The lightweight retaining wall 2 is set on the side of the lightweight foam soil 3 away from the slope 1. The lightweight retaining wall 2 includes longitudinal lattice beams and transverse lattice beams connected to each other; the top of the lightweight foam soil 3 is flush with the top of the slope 1 after excavation, and the roadbed 4 is set at the top of the lightweight foam soil 3 and the top of the slope 1 after excavation; the lightweight retaining wall 2 is provided with a first stabilizing component 5 for stabilizing the lightweight foam soil 3 on the lightweight retaining wall 2.

[0032] The first stabilizing component 5 includes an anchor rod 51 and a grouting pipe 52; the grouting pipe 52 is used to fill concrete; an anchor hole is provided at the connection between the transverse lattice beam and the longitudinal lattice beam of the lightweight facing wall 2, and the grouting pipe 52 is passed through the anchor hole to penetrate the lightweight facing wall 2, the lightweight foam soil 3 and the slope 1, and the anchor rod 51 is installed in the grouting pipe 52; one end of the anchor rod 51 passing through the grouting pipe 52 is buried in the slope 1.

[0033] When supporting the slope 1, first, excavate the cross section of the roadbed 4 according to the design elevation of the roadbed 4 to form a construction work platform; second, correct the rock slope 1, clean the topsoil and rock weathering layer of the slope 1 and the excavation steps; third, set a template on the side of the roadbed 4, cast the lightweight protective wall 2, and the wall material is C30 concrete; fourth, after the strength of the lightweight protective wall 2 reaches more than 75%, fill the backfill side of the roadbed 4 with lightweight foam soil 3 in layers; fifth, locate and drill anchor holes on the protective wall, and the drilling depth is not less than 3 meters into the rock mass. After cleaning the hole, install anchor rods 51 and grouting pipes 52. The anchor rods 51 use HRB400 threaded steel bars with a diameter of 25 mm. The anchor rods 51 are arranged in a grid with a spacing of 2.5×2.5 meters; sixth, grouting is performed at the bottom of the hole. Ordinary silicate cement mortar is used for grouting. When the grouting strength reaches 80%, the ends of the anchor rods 51 are anchored through the longitudinal and transverse grid beams on the protective wall.

[0034] For existing old roads, the retaining structure of the present application can make full use of the existing roadbed 4, widen the roadbed 4 through anchor rods 51, lightweight retaining walls 2 and lightweight foam soil 3, reduce the use of large-volume retaining walls, and reduce construction workload. For newly built roads, the use of lightweight retaining walls 2 and lightweight foam soil 3 can reduce the use of earth and stone and the setting of protective projects, reduce the difficulty of implementing construction projects, and maximize project benefits.

[0035] Reference Figure 1 Drainage grooves 41 are arranged on both sides of the roadbed 4 along the length direction of the roadbed 4. Rainwater can be discharged in time during thunderstorms through the drainage grooves 41, reducing the erosion of the slope 1 by rainwater.

[0036] Reference Figure 1 The first stabilizing component 5 is located at the bottom of the lightweight retaining wall 2, and the top of the lightweight retaining wall 2 is provided with a second stabilizing component 6 for stabilizing the lightweight foam soil 3 between the lightweight retaining wall 2 and the slope 1; several pairs of the second stabilizing components 6 are arranged along the length direction of the roadbed 4, and the stability of the top of the lightweight retaining wall 2 is improved by multiple pairs of second stabilizing components.

[0037] Reference Figure 1 and Figure 2The second stabilizing component 6 includes a first stabilizing block 61, a second stabilizing block 62 and a connecting steel cable 63. The first stabilizing block 61 is arranged in the slope 1, the second stabilizing block 62 is fixed in the lightweight retaining wall 2, the connecting steel cable 63 is buried in the lightweight foam soil 3, and the two ends of the connecting steel cable 63 are respectively fixedly connected to the first stabilizing block 61 and the second stabilizing block 62; using the first stabilizing block 61 and the second stabilizing block 62, the workers only need to fill the lightweight foam soil 3 to a certain height, use the connecting steel cable 63 to connect the first stabilizing block 61 and the second stabilizing block 62, and then directly bury the connecting steel cable 63 in the lightweight foam soil 3, thereby reducing the construction of drilling holes and burying drill rods at a certain height, and reducing the construction difficulty of workers.

[0038] Reference Figure 2 The first stabilizing block 61 is provided with a plurality of pairs of rotation grooves, and the first stabilizing block 61 is rotatably mounted with a plurality of pairs of arc plates 611 along the vertical direction through the rotation grooves, and the two arc plates 611 of the same pair rotate in a direction away from each other; when the two arc plates 611 of the same pair rotate, each arc plate 611 protrudes from the first stabilizing block 61 and is inserted into the earth of the slope 1; the second stabilizing component 6 also includes a driving member for driving the arc plates 611 to rotate in the first stabilizing block 61.

[0039] The driving member includes a pull rope 71 and a plurality of pairs of gears 72. A rack is provided on the outer arc surface of the arc plate 611. The plurality of pairs of driving gears 72 are rotatably mounted on the first stabilizing block 61. The two gears 72 of each pair correspond to the racks on the two arc plates 611 of each pair. The gears 72 are meshed with the corresponding racks. The two gears 72 of the same pair are meshed with each other. One end of the pull rope 71 is wound around the rotating shaft of one of the gears 72, and the other end is passed through the lightweight foam soil 3 and then passed through the lightweight foam soil 3. The worker only needs to pull the rope 71 through one end of the lightweight protective wall 2 to drive the gear 72 to rotate, thereby driving the arc plate 611 to rotate; an arc-shaped elastic block 73 is provided on the inner arc surface of the arc plate 611, and a locking groove is opened on the groove wall of the rotating groove of the first stabilizing block 61. When the arc block rotates and penetrates into the earth of the slope 1, the elastic block 73 is inserted into the first stabilizing block 61 through the locking groove, thereby stabilizing the arc plate 611 in the earth of the slope 1.

[0040] The implementation principle of a lightweight retaining structure suitable for a rocky high and steep slope roadbed in an embodiment of the present application is as follows: after cleaning the slope surface 1, a template is set on the side and concrete is poured to form a lightweight protective wall 2, and then lightweight foam soil 3 is filled between the lightweight protective wall 2 and the slope surface 1. When the lightweight foam soil 3 is filled to a certain height, the first stabilizing block 61 is buried in the excavated slope surface 1, and then the two ends of the connecting steel cable 63 are respectively connected to the first stabilizing block 61 and the second stabilizing block 62, and then the pull rope 71 is pulled to drive the arc plate 611 in the first stabilizing block 61 to extend out of the first stabilizing block 61 and insert into the earth, thereby increasing the contact area between the first stabilizing block 61 and the earth on the slope surface 1, and improving the pull-out resistance of the first stabilizing block 61, thereby forming a stable pull-out resistance for the lightweight protective wall 2 through the connecting steel cable 63.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lightweight retaining structure suitable for rocky high and steep slope roadbed, comprising a lightweight facing wall (2) and lightweight foam soil (3), characterized in that: The lightweight foam soil (3) is used to be arranged at the steep slope of the slope (1); the lightweight retaining wall (2) is arranged on the side of the lightweight foam soil (3) away from the slope (1); the top of the lightweight foam soil (3) is flush with the top of the slope (1) after excavation; a roadbed (4) is arranged between the top of the lightweight foam soil (3) and the top of the slope (1) after excavation; and a first stabilizing component (5) for stabilizing the lightweight foam soil (3) on the lightweight retaining wall (2) is arranged on the lightweight retaining wall (2).

2. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 1, characterized in that: The first stabilizing component (5) comprises an anchor rod (51) and a grouting pipe (52); the grouting pipe (52) is used for filling concrete, the grouting pipe (52) is passed through the lightweight retaining wall (2), the lightweight foam soil (3) and the slope (1), and the anchor rod (51) is installed in the grouting pipe (52); one end of the anchor rod (51) passing through the grouting pipe (52) is buried in the slope (1).

3. The light retaining structure suitable for rocky high and steep slope roadbed according to claim 1 is characterized in that: The roadbed (4) is provided with drainage grooves (41) on both sides along its length direction.

4. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 2, characterized in that: The first stabilizing component (5) is located at the bottom of the lightweight retaining wall (2), and a second stabilizing component (6) for stabilizing the lightweight foam soil (3) between the lightweight retaining wall (2) and the slope (1) is provided at the top of the lightweight retaining wall (2).

5. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 4, characterized in that: The second stabilizing component (6) comprises a first stabilizing block (61), a second stabilizing block (62) and a connecting steel cable (63); the first stabilizing block (61) is arranged in the slope (1); the second stabilizing block (62) is fixed in the lightweight retaining wall (2); the connecting steel cable (63) is buried in the lightweight foam soil (3); and the two ends of the connecting steel cable (63) are respectively fixedly connected to the first stabilizing block (61) and the second stabilizing block (62).

6. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 5, characterized in that: The first stabilizing block (61) is provided with a plurality of pairs of rotation grooves, and the first stabilizing block (61) is rotatably mounted with a plurality of pairs of arc plates (611) in a vertical direction through the rotation grooves, and the two arc plates (611) of the same pair rotate in a direction away from each other; when the two arc plates (611) of the same pair rotate, each arc plate (611) protrudes from the first stabilizing block (61) and is inserted into the earth of the slope (1); the second stabilizing component (6) also includes a driving member for driving the arc plates (611) to rotate in the first stabilizing block (61).

7. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 6, characterized in that: The driving member comprises a pull rope (71) and a plurality of pairs of gears (72); a rack is provided on the outer arc surface of the arc plate (611); the plurality of pairs of gears (72) are rotatably mounted on the first stabilizing block (61); the two gears (72) of each pair correspond to the racks on the two arc plates (611) of each pair; the gears (72) are meshed with the corresponding racks; the two gears (72) of the same pair are meshed with each other; one end of the pull rope (71) is wound around the rotating shaft of one of the gears (72); the other end is passed through the lightweight foam soil (3) and the lightweight retaining wall (2).

8. A light retaining structure suitable for rocky high and steep slope roadbed according to claim 7, characterized in that: An arc-shaped elastic block (73) is arranged on the inner arc surface of the arc-shaped plate (611), and a locking groove is provided on the groove wall of the rotating groove of the first stabilizing block (61). When the arc-shaped plate (611) is rotated and penetrated into the earth of the slope (1), the elastic block (73) is inserted into the first stabilizing block (61) through the locking groove.

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