A support system suitable for space-constrained conditions

Abstract

This utility model discloses a support system suitable for space-constrained conditions. Several anti-slide piles are arranged side-by-side at intervals on a hillside. A support area is formed by excavation behind the anti-slide piles. The side of the support area facing the anti-slide piles is an inclined excavation face, and its surface is equipped with an anchor-sprayed support structure. Within the support area, several precast retaining plates, a filter layer, and a backfill layer are vertically arranged sequentially from behind the anti-slide piles. Each precast retaining plate has multiple drainage holes, which are located between two anti-slide piles. The filter layer covers several precast retaining plates. This solution, by using precast retaining plates, can shorten the curing period of the retaining plates, improve construction efficiency, and, during construction, rationally optimize the angle of the excavation face behind the hillside wall and the overall layout of the support area according to the complex terrain, thereby reducing the land used for road construction.

Description

Technical Field

[0001] This utility model relates to the field of slope and landslide control technology, and in particular to a support system suitable for space-constrained conditions. Background Technology

[0002] Currently, anti-slide pile protection technology is widely used in slope stabilization. Existing anti-slide pile protection uses cast-in-place anti-slide pile retaining walls. However, in slope stabilization, conventional cast-in-place anti-slide pile retaining walls have two main drawbacks: firstly, the construction process is complex and requires a long curing period, severely hindering project progress; secondly, the construction process necessitates setting up a concrete mixer at the top of the slope to mix and pour cement concrete on-site, requiring a sufficiently large construction site at the top. The limitations of this traditional construction method are particularly pronounced in areas with extremely scarce land resources and complex surrounding environments, potentially impacting the lives of nearby residents, buildings, or the natural ecosystem, and failing to meet the construction needs under current complex conditions.

[0003] Based on the above problems, it is necessary to study a support system suitable for space-constrained conditions. Utility Model Content

[0004] To address the above problems, this utility model provides a support system suitable for space-constrained conditions. By using prefabricated retaining plates, the curing cycle of the retaining plates can be shortened, construction efficiency can be improved, and the angle of the back excavation face of the mountain wall and the overall layout of the support area can be reasonably optimized according to the complex terrain during construction, which can reduce the land used for road construction.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A support system suitable for space-constrained conditions includes several anti-slide piles arranged side-by-side at intervals on a hillside. A support area is excavated behind the anti-slide piles, and the side of the support area facing the anti-slide piles is an inclined excavation face with an anchor-sprayed support structure. Within the support area, several precast retaining plates, a filter layer, and a backfill layer are vertically arranged sequentially from the rear of the anti-slide piles. Each precast retaining plate has multiple drainage holes, which are located between two anti-slide piles. The filter layer covers several precast retaining plates.

[0007] Furthermore, the inclination angle of the excavation face is 1:0.2-1:0.5.

[0008] Furthermore, a precast retaining plate is installed between two adjacent anti-slide piles, and the two sides of the precast retaining plate are fixed to the contact surface with the corresponding anti-slide pile using a solvent-based adhesive.

[0009] Furthermore, a concrete layer is poured in the area below the precast retaining wall and the excavation face. The concrete layer is made of C20 concrete and is 20cm thick.

[0010] Furthermore, the backfill layer is slag, the particle size of which is greater than 40 mm, the stone content is greater than 30%, and the maximum particle size of the stone is not greater than 150 mm.

[0011] Furthermore, the drainage holes are inclined downwards towards the side closest to the anti-slide pile, and the horizontal spacing between the multiple drainage holes is 4m, and the vertical spacing is 2m.

[0012] Furthermore, PVC pipes with a diameter of 20mm are pre-embedded in the drainage holes on the precast retaining plate, and multiple drainage holes are arranged between two adjacent anti-slide piles.

[0013] Furthermore, the precast retaining plate is a reinforced concrete casting component with a height greater than 8m and is equipped with multiple lifting rings.

[0014] Furthermore, the filter layer includes geotextiles laid on both sides and at the bottom, graded crushed stone filled inside the geotextiles, and a drainage mesh laid on top of the graded crushed stone.

[0015] Furthermore, the anti-slide pile is made of C30 concrete, the coarse aggregate particle size of the concrete is no more than 50mm, the center-to-center distance between two adjacent anti-slide piles is 4m, and the bottom of the pile is paved with 100mm thick cement mortar.

[0016] Furthermore, the anchor-sprayed support structure includes anchor bolts anchored into the mountain, a wire mesh covering the excavation face, and a concrete layer for anchor spraying.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] (1) This utility model optimizes the cast-in-place retaining plate into a precast retaining plate, which eliminates the need for a long on-site curing period during use. At the same time, each precast retaining plate is precast with lifting rings and drainage holes, which facilitates construction and greatly speeds up the construction progress of the anti-slide pile slope protection project and improves construction efficiency. In addition, the precast retaining plate is produced in a standardized factory, which can more strictly control the quality, making the quality control of the retaining plate and the construction process more convenient.

[0019] (2) In situations where road space is scarce and the surrounding environment is complex, this utility model can optimize the angle of the excavation face, adjust the excavation of the support area in a timely manner, reduce road land use, improve road excavation efficiency, and save land resources.

[0020] (3) This utility model provides a filter layer that fully covers the rear side of the precast retaining slab layer and adds a drainage mesh to accelerate drainage performance and avoid water accumulation that could lead to excessive humidity in the precast retaining slab and anti-slide pile, thus affecting their service life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0023] Figure 2 This is a front view of a precast retaining wall.

[0024] Figure 3 This is a schematic diagram of the side cross-section of a precast retaining slab;

[0025] Figure 4 This is a schematic diagram of the side cross-section of the filter layer;

[0026] Figure 5 This is a top view of the entire utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Anti-slide piles; 2. Precast retaining walls; 21. Drainage holes; 22. Lifting rings; 3. Filter layer; 31. Geotextile; 32. Graded crushed stone; 33. Drainage mesh; 4. Backfill layer; 5. Excavation face; 6. Concrete layer; 7. Anchor-sprayed support structure; 8. Support area; Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, this utility model provides a support system suitable for space-constrained conditions. Several anti-slide piles 1 are arranged side by side at intervals on a hillside. A support area 8 is formed by excavation behind the anti-slide piles 1. The side of the support area 8 facing the anti-slide piles 1 is an inclined excavation surface 5, and its surface is provided with an anchor-sprayed support structure 7. Several prefabricated retaining plates 2, a filter layer 3, and a backfill layer 4 are arranged vertically in sequence from the rear side of the anti-slide piles 1 in the support area 8. Each prefabricated retaining plate 2 is provided with multiple drainage holes 21, which are arranged between two anti-slide piles 1. The size of the filter layer 3 covers several prefabricated retaining plates 2.

[0032] In this embodiment, the anti-slide pile 1 is made of C30 concrete with a coarse aggregate particle size of no more than 50mm. The center-to-center distance between two adjacent anti-slide piles 1 is 4m. The bottom of the pile is covered with 100mm thick cement mortar, which is used to reinforce the anti-slide pile 1 after it hardens.

[0033] In this construction, a precast retaining plate 2 is installed between two adjacent anti-slide piles 1. The contact surfaces of the precast retaining plate 2 with the corresponding anti-slide pile 1 on both sides are coated with a solvent-based adhesive to secure the precast retaining plate 2. More specifically, before installing the precast retaining plate 2, the front protective arm of the anti-slide pile 1 needs to be removed, and the two are then fixedly bonded together using a solvent-based adhesive at their contact surfaces. Preferably, the solvent-based adhesive is a commercially available concrete interface agent.

[0034] In this embodiment, the precast retaining plate 2 is a reinforced concrete casting component with a height greater than 8m. It is equipped with multiple lifting rings 22 for hoisting the precast retaining plate 2, which simplifies the construction process.

[0035] It is worth noting that a concrete layer 6 is poured in the area below the precast retaining plate 2 and the excavation surface 5 in this utility model. The concrete layer 6 is made of C20 concrete and has a thickness of 20cm. It is used to further reinforce the precast retaining plate 2 and improve the protective ability of the precast retaining plate.

[0036] In this embodiment, the inclination angle of the excavation face 5 is 1:0.2-1:0.5. The selection of the inclination angle of the excavation face 5 depends on the road space and the complexity of the surrounding environment. For example, in this embodiment, for situations where road space is scarce and the surrounding environment is complex, the inclination angle of the excavation face behind the mountain wall can be optimized and adjusted to 1:0.2 to reduce the land used for road construction. In addition, after the excavation is completed, an anchor-sprayed support structure 7 is provided on the surface of the excavation face 5. Specifically, the anchor-sprayed support structure 7 includes anchor rods anchored in the mountain, a steel mesh covering the excavation face 5, and an anchor-sprayed concrete layer 6 to achieve protection of the excavation face 5, thereby further improving the protection capability of the retaining wall.

[0037] Furthermore, in this embodiment, backfill layer 4 is quarry slag, with a particle size greater than 40mm, a stone content greater than 30%, and a maximum stone particle size not exceeding 150mm. After backfilling, the quarry slag is compacted using small machinery, with a compaction degree of not less than 85% to ensure its density.

[0038] In this embodiment, the rear side of the precast retaining plate 2 is provided with a filter layer 3 whose shape and size are adapted to it. The filter layer 3 includes geotextile 31 laid on both sides and bottom, graded crushed stone 32 filled in the geotextile 31, and a drainage mesh 33 laid on top of the graded crushed stone 32. The structure of the filter layer 3 in this embodiment is designed to accelerate drainage performance and avoid water accumulation that could cause the precast retaining plate 2 and the anti-slide pile 1 to have excessive humidity, thus affecting their service life.

[0039] Example 2

[0040] like Figure 3 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is that: in this embodiment, PVC pipes are pre-embedded in the multiple drainage holes 21 set on the precast retaining plate 2. The diameter of the PVC pipes is 20mm, the horizontal spacing of the multiple drainage holes 21 is 4m, and the vertical spacing is 2m, evenly distributed between two adjacent anti-slide piles 1.

[0041] Among them, the drainage hole 21 is inclined downward towards the side close to the anti-slide pile 1, and combined with the setting of the filter layer 3, it can accelerate the rapid discharge of rainwater from the back of the mountain wall.

[0042] To facilitate a better understanding of the features of this plan, the construction method, sequence, and procedure are as follows:

[0043] (1) Accurately measure the terrain where road space is scarce and the surrounding environment is complex, and explore the geological conditions to level the construction platform;

[0044] (2) Carry out the construction of anti-slide pile 1. After the pile strength reaches 100%, the lower slope is excavated in sections along the longitudinal direction to form the support area 8. Anchor spray support structure 7 is installed on the excavation surface 5 after the excavation is completed.

[0045] (3) Pour a 20cm thick C20 concrete layer 6, and then hoist and install the precast retaining plate 2;

[0046] (4) After installing the precast retaining plate 2, the filter layer 3 is arranged according to the size of the entire retaining plate. First, geotextile 31 is laid on both sides and the bottom. Graded crushed stone 32 is filled in the geotextile 31 and drainage net mat 33 is laid on top of the graded crushed stone 32. Then, compaction is carried out to ensure its density and stability.

[0047] (5) Backfill the space between the excavation face 5 and the filter layer 3 with slag. After backfilling, compact the slag with small machinery. The compaction degree shall not be less than 85%.

[0048] (6) Finally, the entire support process is improved to ensure its stability and guarantee the safety of road excavation.

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A support system suitable for use in space-restricted conditions, characterised in that, Several anti-slide piles are arranged side by side at intervals on the hillside. A support area is formed by excavation behind the anti-slide piles. The side of the support area facing the anti-slide piles is an inclined excavation face, and its surface is equipped with an anchor-sprayed support structure. In the support area, several precast retaining plates, a filter layer, and a backfill layer are vertically arranged in sequence from the back of the anti-slide piles. Each precast retaining plate is provided with multiple drainage holes, which are arranged between two anti-slide piles. The size of the filter layer covers several precast retaining plates.

2. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The inclination angle of the excavation face is 1:0.2-1:0.

5.

3. The support system suitable for space-restricted conditions according to claim 1, characterized in that, A precast retaining plate is installed between two adjacent anti-slide piles, and the two sides of the precast retaining plate are fixed to the contact surface with the corresponding anti-slide pile using a solvent-based adhesive.

4. The support system suitable for space-restricted conditions according to claim 1, characterized in that, A concrete layer is poured in the area below the precast retaining wall and the excavation face.

5. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The backfill layer is slag, with a particle size greater than 40 mm, a stone content greater than 30%, and a maximum stone particle size of no more than 150 mm.

6. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The drainage holes are inclined downwards towards the side closest to the anti-slide pile, and the horizontal spacing between the multiple drainage holes is 4m, and the vertical spacing is 2m.

7. The support system suitable for space-restricted conditions according to claim 4, characterized in that, PVC pipes with a diameter of 20mm are pre-embedded in the drainage holes on the precast retaining plate, and multiple drainage holes are arranged between two adjacent anti-slide piles.

8. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The precast retaining wall is a reinforced concrete casting component with a height greater than 8m and multiple lifting rings on it.

9. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The filter layer includes geotextiles laid on both sides and at the bottom, graded crushed stone filled inside the geotextiles, and a drainage mesh laid on top of the graded crushed stone.

10. The support system suitable for space-restricted conditions according to claim 1, characterized in that, The anti-slide piles are made of C30 concrete with a coarse aggregate particle size of no more than 50mm. The center-to-center distance between two adjacent anti-slide piles is 4m, and the bottom of the pile is paved with 100mm thick cement mortar.

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