Supporting structure for treating side slope shallow-buried karst cave

Abstract

The invention provides a supporting structure for treating a side slope shallow-buried karst cave, which comprises a bedrock layer (1), a karst cave (2) positioned in the bedrock layer (1), a soft soil layer (3) positioned above the bedrock layer (1) and a roadbed (5) positioned on one side of the bedrock layer (1), two rows of slide-resistant piles (6) are arranged in the soft soil layer (3) along the line direction, and every two slide-resistant piles (6) in each row are fixedly connected. The anti-slide piles (6) located on one side of the roadbed (5) penetrate through the soft soil layer (3) to be embedded into bedrock below the karst cave (2), a side slope grating (7) is arranged upwards from the roadbed (5) along a side slope, the side slope grating (7) is connected with the anti-slide piles (6), and dry hard concrete (8) is poured in the bedrock layer (1) and the karst cave (2) to form an integrated grouting reinforcement area. The side slope shallow-buried karst cave supporting structure improves the stability of the side slope, reinforces the bedrock layer at the karst cave, and meanwhile has the advantages of being economical, efficient, durable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering, and in particular to a supporting structure for treating shallow buried karst caves on a slope. Background Art

[0003] The geological conditions in karst areas are complex, caves are frequently developed, the thickness of soft soil layers is large, and the stability of slopes is seriously threatened. However, with the continuous improvement of construction technology and the rapid development of engineering construction, traditional slope treatment methods face some difficulties in karst areas. Previous practices may require a large amount of earth excavation and filling, causing environmental damage, and it is difficult to ensure the long-term stability of slopes under the special geological conditions of karst areas.

[0004] Therefore, for construction projects in karst areas, it is of great significance to adopt this kind of shallow buried cave support structure on the slope. It can make full use of the geological characteristics of the karst area and provide a feasible solution through the combined use of anti-slide piles, slope grids and grouting reinforcement areas. This support structure can effectively increase the stability of the slope, reduce the risk of landslides and collapses caused by caves, and provide support for the sustainable development of urbanization projects in karst areas. Summary of the invention

[0005] The purpose of the present invention is to provide a support structure for dealing with shallow buried caves on slopes, aiming to solve or improve at least one of the above-mentioned technical problems. By setting anti-slide piles and slope grids, it provides support and reinforcement for soft soil layers and caves. The anti-slide piles provide additional stability for the slope by penetrating the soft soil layer and embedding into the bedrock. The slope grid is connected to the anti-slide piles, further strengthening the overall stability of the slope. Finally, dry hard concrete is poured in the bedrock layer to form a grouting reinforcement area, forming an integrated structure with the cave, providing effective support and solidification for the cave.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a support structure for treating shallow buried caves on a slope, comprising a bedrock layer (1), a cave (2) located in the bedrock layer (1), a soft soil layer (3) located above the bedrock layer (1), and a roadbed (5) located on one side of the bedrock layer (1); two rows of anti-sliding piles (6) are arranged in the soft soil layer (3) along the line direction; each row of anti-sliding piles (6) are fixedly connected to each other; the anti-sliding piles (6) located on one side of the roadbed (5) all penetrate the soft soil layer (3) and are embedded in the bedrock under the cave (2); a slope grid (7) is arranged along the slope from the roadbed (5) upwards; the slope grid (7) is connected to the anti-sliding piles (6); dry hard concrete (8) is poured in the bedrock layer (1) and the cave (2) to form an integrated grouting reinforcement area. This shallow buried cave support structure on the slope improves the stability of the slope and reinforces the bedrock layer at the cave. It is also economical, efficient, durable and reliable.

[0007] Preferably, the anti-slip piles (6) are arranged in two rows in the horizontal direction and are connected at the top.

[0008] Preferably, the anti-slip pile (6) is cylindrical, and the diameter of the anti-slip pile (6) is 150-400 mm.

[0009] Preferably, the slope grid (7) is arranged on one side of the slope along the slope direction, and the slope grid (7) is connected to the anti-slip pile (6).

[0010] First, the karst under the soft soil foundation is reinforced by grouting, filling the karst cracks and caves, blocking the groundwater activity space, forming an aquiclude, and preventing karst collapse caused by groundwater level fluctuations. In this way, the long-term stability of the karst foundation is guaranteed by grouting the lower karst; two rows of anti-slide piles are set along the line direction in the soft soil layer, and each row of anti-slide piles is connected by fixed connections. These anti-slide piles should completely penetrate the soft soil layer and embed into the bedrock at the bottom of the cave to provide stable support. From the roadbed along the slope to the top, a slope grid is set along the slope line. The slope grid is connected to the anti-slide pile, and can be connected using connectors or fixing devices. The installation of the slope grid should ensure firmness and reliability to form an integrated grouting reinforcement area.

[0011] The beneficial effects of the present invention are:

[0012] The present invention performs grouting reinforcement on the cave (2). First, grouting reinforcement is used for the karst under the soft soil foundation to fill the karst cracks and caves, block the groundwater activity space, form a water-proof layer, and prevent karst collapse caused by groundwater level fluctuations. In this way, by grouting reinforcement of the lower karst, the long-term stability of the karst foundation is guaranteed; two rows of anti-slip piles are set in the soft soil layer along the line direction, and each row of anti-slip piles is connected by a fixed connection. These anti-slip piles should completely penetrate the soft soil layer and embed into the bedrock at the bottom of the cave to provide stable support. From the roadbed along the slope to the top, a slope grid is set along the slope line. The slope grid is connected to the anti-slip piles, and can be connected using a connector or a fixing device. The installation of the slope grid should ensure that it is firm and reliable to form an integrated grouting reinforcement area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] In the figure: 1. Bedrock layer; 2. Karst cave; 3. Soft soil layer; 5. Roadbed; 6. Anti-slide piles; 7. Slope grid; 8. Dry hard concrete. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] The present invention provides a support structure for treating shallow buried caves on a slope, comprising a bedrock layer (1), a cave (2) located in the bedrock layer (1), a soft soil layer (3) located above the bedrock layer (1), and a roadbed (5) located on one side of the bedrock layer (1). Two rows of anti-sliding piles (6) are arranged in the soft soil layer (3) along the route direction, and each row of anti-sliding piles (6) are fixedly connected to each other. The anti-sliding piles (6) located on one side of the roadbed (5) penetrate the soft soil layer (3) and are embedded in the bedrock under the cave (2). A slope grid (7) is arranged along the slope from the roadbed (5) upwards, and the slope grid (7) is connected to the anti-sliding piles (6). Dry hard concrete (8) is poured in the bedrock layer (1) and the cave (2) to form an integrated grouting reinforcement area. This support structure for shallow buried caves on a slope improves the stability of the slope, reinforces the bedrock layer at the cave, and is economical, efficient, durable and reliable.

[0020] According to a further optimized solution, the anti-slip piles (6) are arranged in two rows in the horizontal direction and connected at the top.

[0021] According to a further optimized solution, the anti-slip pile (6) is cylindrical, and the diameter of the anti-slip pile (6) is 150-400 mm.

[0022] According to a further optimized solution, the slope grid (7) is arranged on one side of the slope along the slope direction, and the slope grid (7) is connected to the anti-slip pile (6).

[0023] A support structure for treating shallow buried caves on slopes, the specific steps are as follows:

[0024] Step 1: Grouting is used to reinforce the karst under the soft soil foundation, filling karst cracks and caves, blocking the space for groundwater activity, forming an aquiclude, and preventing karst collapse caused by groundwater level fluctuations. In this way, the long-term stability of the karst foundation is ensured by grouting the lower karst;

[0025] Step 2: Before the initial solidification of the solidified soil, two rows of anti-slide piles are set in the soft soil layer along the route direction by pressing or vibrating the anti-slide piles, and each row of anti-slide piles is connected by fixed connections. These anti-slide piles should completely penetrate the soft soil layer and be embedded in the bedrock at the bottom of the cave to provide stable support.

[0026] Step 3: Install the slope grid along the slope line from the roadbed upward along the slope. The slope grid is connected to the anti-slide piles and can be connected using connectors or fixings. The installation of the slope grid should ensure firmness and reliability to form an integrated grouting reinforcement area.

Claims

1. The present invention discloses a support structure for treating shallow buried caves on a slope, comprising a bedrock layer (1), a cave (2) located in the bedrock layer (1), a soft soil layer (3) located above the bedrock layer (1), and a roadbed (5) located on one side of the bedrock layer (1). Two rows of anti-sliding piles (6) are arranged in the soft soil layer (3) along the route direction, and each row of anti-sliding piles (6) are fixedly connected to each other. The anti-sliding piles (6) located on one side of the roadbed (5) penetrate the soft soil layer (3) and are embedded in the bedrock under the cave (2). A slope grid (7) is arranged along the slope from the roadbed (5) upward, and the slope grid (7) is connected to the anti-sliding piles (6). Dry hard concrete (8) is poured in the bedrock layer (1) and the cave (2) to form an integrated grouting reinforcement area. This support structure for shallow buried caves on a slope improves the stability of the slope, reinforces the bedrock layer at the cave, and is economical, efficient, durable and reliable.

2. A support structure for treating shallow buried caves on slopes according to claim 1, characterized in that: The anti-slip pile (6) is cylindrical, and the diameter of the anti-slip pile (6) is 150-400 mm.

3. A support structure for treating shallow buried caves on slopes according to claim 2, characterized in that: The anti-slip piles (6) are arranged in two rows in the horizontal direction and are connected at the tops.

4. A support structure for treating shallow buried caves on slopes according to claim 1, characterized in that: The slope grid (7) is arranged on one side of the slope along the slope direction, and the slope grid (7) is connected to the anti-slip pile (6).

5. A support structure for treating shallow buried caves on slopes, characterized by: The supporting structure for treating shallow buried caves on slopes as described in any one of claims 1 to 4 comprises the following specific steps: Step 1: Grouting is used to reinforce the karst under the soft soil foundation, filling karst cracks and caves, blocking the space for groundwater activity, forming an aquiclude, and preventing karst collapse caused by groundwater level fluctuations. In this way, the long-term stability of the karst foundation is ensured by grouting the lower karst; Step 2: Before the initial solidification of the solidified soil, two rows of anti-slide piles are set in the soft soil layer along the route direction by pressing or vibrating the anti-slide piles, and each row of anti-slide piles is connected by fixed connections. These anti-slide piles should completely penetrate the soft soil layer and be embedded in the bedrock at the bottom of the cave to provide stable support. Step 3: Install the slope grid along the slope line from the roadbed upward along the slope. The slope grid is connected to the anti-slide piles and can be connected using connectors or fixings. The installation of the slope grid should ensure firmness and reliability to form an integrated grouting reinforcement area.

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