Geological disaster control project drainage channel structure and construction method thereof

Abstract

The invention provides a drainage channel structure of a geological disaster control project and a construction method of the drainage channel structure, and relates to the technical field of drainage channels. The drainage channel structure of the geological disaster control project comprises an excavated U-shaped drainage channel body, a channel body supporting structure is arranged in the drainage channel body, and the channel body supporting structure comprises a first supporting layer and a second supporting layer arranged on the inner side of the first supporting layer; the first supporting layer comprises U-shaped supporting walls and a U-shaped concrete platform which are matched with the U-shaped drainage channel body, the U-shaped supporting walls are embedded in supporting wall setting cavities so as to form the first supporting layer with the U-shaped concrete platform, and the U-shaped supporting walls are formed by filling stone cages with broken stones; the second supporting layer is a concrete layer, and waterproof geotechnical cloth is arranged between the second supporting layer and the first supporting layer. The concrete layer of the second layer is not prone to cracking or damage, the canal body supporting structure is more stable, and the service life is longer.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage channels, in particular to a drainage channel structure for a geological disaster control project and a construction method thereof. Background Art

[0002] Drainage channels are a core, commonly used, and often the first engineering measure implemented in geological disaster mitigation projects (such as landslides, collapses, debris flows, and ground subsidence). They intercept surface runoff and reduce infiltration. Existing drainage channel construction methods and related technologies primarily rely on post-excavation concrete pouring. Directly supported by concrete, these channels have poor structural stability and are prone to cracking, damage, and ditch collapse during use due to deformation of the surrounding soil. Increasing the concrete thickness significantly increases construction costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a drainage channel structure for geological disaster control projects which has a more stable structure and can take into account construction costs and a construction method thereof.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: a drainage channel structure for a geological disaster control project includes an excavated U-shaped drainage channel body, wherein a channel support structure is provided inside the drainage channel body, and the channel support structure includes a first support layer and a second support layer provided inside the first support layer;

[0005] The first supporting layer includes a U-shaped supporting wall and a U-shaped concrete platform adapted to the U-shaped drainage channel body. The U-shaped concrete platforms are multiple and spaced apart along the extension direction of the drainage channel body. The U-shaped concrete platforms are fixed to the drainage channel body by steel pipe piles extending into the soil of the drainage channel body. A supporting wall setting cavity is formed between adjacent U-shaped concrete platforms. The U-shaped supporting wall is embedded in each of the supporting wall setting cavities to form a first supporting layer with the U-shaped concrete platform. The U-shaped supporting wall is formed by filling a gabion box with crushed stone. The U-shaped supporting wall is provided with an anchor rod extending into the soil of the drainage channel body.

[0006] The second supporting layer is a concrete layer, and a waterproof geotextile is provided between the second supporting layer and the first supporting layer.

[0007] Furthermore, the anchor rods are arranged on both side surfaces of the U-shaped supporting wall.

[0008] Furthermore, the anchor rod extends into the second supporting layer and is welded to the steel mesh in the second supporting layer.

[0009] Furthermore, protrusions are respectively provided on both sides of the U-shaped concrete platform, extending along the width direction of the drainage channel body and extending into the soil of the drainage channel body.

[0010] Furthermore, the spacing between the U-shaped concrete platforms is 8 to 12 meters.

[0011] Furthermore, the thickness of the U-shaped supporting wall is between 1200 and 1500 mm.

[0012] Furthermore, the particle size of the gravel filled in the gabion box is d, d=(1.5-2.0)D, and D is the aperture of the gabion box.

[0013] The present invention also provides a construction method for the drainage channel structure of the geological disaster control project, comprising:

[0014] Step 1: excavate the U-shaped drainage channel body and compact the soil around the excavated U-shaped drainage channel body;

[0015] Step 2: Install a U-shaped concrete platform at the required location and fix the U-shaped concrete platform with steel pipe piles;

[0016] Step 3: Place gabions of corresponding size in the cavity of the support wall and fill with gravel to form a U-shaped support wall, and construct anchor rods on the U-shaped support wall until the first support layer is completed;

[0017] Step 4: Lay waterproof geotextile on the first supporting layer;

[0018] Step 5: Pour concrete on the waterproof geotextile to form the second support layer.

[0019] The beneficial effects of the present invention are:

[0020] The drainage channel structure for geological disaster control projects of the present invention comprises a channel support structure consisting of a second support layer and a first support layer. The second support layer is a concrete layer, and the first support layer comprises a U-shaped support wall 22 formed by filling crushed stone in a gabion box 221 and a U-shaped concrete platform 21. Under the premise of the same support performance, the pouring thickness of the concrete layer is thinner, and most of the first support layer can be made of local materials. Therefore, overall, the cost of the channel support structure is lower, reducing the construction cost of the drainage channel.

[0021] Because the first supporting layer is formed by the U-shaped supporting wall 22 formed by filling gravel in the gabion box 221 and the U-shaped concrete platform 21, there are inevitably gaps between the wall gravels. Therefore, when the soil is subjected to local deformation into the channel body, a certain amount of soil deformation can be absorbed, so that the second layer of concrete layer is not easy to crack or be damaged, and the channel support structure is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the setup of a U-shaped concrete platform;

[0024] Figure 3 yes Figure 1 Cross-sectional view along AA;

[0025] As shown in the figure: drainage channel body 1, second supporting layer 3, waterproof geotextile 4, steel pipe piles 5, anchor rods 6, supporting wall cavity 11, U-shaped concrete platform 21, U-shaped supporting wall 22, protrusion 211, gabion box 221. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] like Figure 1 、 Figure 2 As shown, the drainage channel structure of the geological disaster control project of the present invention includes an excavated U-shaped drainage channel body 1, and a channel support structure is provided inside the drainage channel body 1. The channel support structure includes a first support layer and a second support layer 3 arranged on the inner side of the first support layer. The first support layer includes a U-shaped support wall 22 and a U-shaped concrete platform 21 designed according to the size of the U-shaped drainage channel body 1 to adapt to the U-shaped drainage channel body 1. There are multiple U-shaped concrete platforms 21 and they are arranged at intervals along the extension direction of the drainage channel body 1. The U-shaped concrete platform 21 is fixed in the drainage channel body 1 by a steel pipe pile 5 extending into the soil of the drainage channel body 1, ensuring that the U-shaped concrete platform 21 can withstand a large force along the direction of the drainage channel, and a support wall setting cavity 11 is formed between adjacent U-shaped concrete platforms 21. The support wall cavity 11 is embedded with a U-shaped support wall 22, forming a first support layer with the U-shaped concrete platform 21. The U-shaped support wall 22 is formed by filling a gabion box 221 with gravel. The U-shaped support wall 22 is provided with anchor rods 6 extending into the soil of the drainage channel body 1. The second support layer 3 is a concrete layer. A waterproof geotextile 4 is provided between the second support layer 3 and the first support layer to enhance the drainage channel's waterproofing capabilities and prevent water from leaking into the surrounding soil, causing soil instability.

[0028] The U-shaped support wall 22 of the present invention is formed by filling gravel in a gabion box 221. The gravel can be obtained locally, and the production cost of the U-shaped support wall is low. There are multiple U-shaped concrete platforms 21 and they are arranged at intervals along the extension direction of the drainage channel body 1. That is, the U-shaped drainage channel body is divided into multiple sections by the U-shaped concrete platforms 21, and the first support layer is composed of the U-shaped support wall 22 and the U-shaped concrete platforms 21 embedded in the support wall setting cavity 11 formed by the U-shaped concrete platforms 21. In this way, each section of the U-shaped support wall 22 is independent of each other and will not affect each other (adjacent U-shaped support walls 22 are separated by the U-shaped concrete platforms), and there will be no deformation accumulation effect. In addition, the U-shaped support wall 22 is provided with an anchor rod 6 extending into the soil of the drainage channel body 1, so the structural stability of the first support layer can be guaranteed.

[0029] The channel support structure of the present invention is composed of a concrete layer (second support layer) and a first support layer, and the first support layer is composed of a U-shaped support wall 22 formed by filling gravel in a gabion box 221 and a U-shaped concrete platform 21. Under the premise of the same support performance, the pouring thickness of the concrete layer is thinner, and the U-shaped support wall 22 of the first support layer can be made from local materials. Therefore, overall, the cost of the channel support structure is lower, reducing the construction cost of the drainage channel. In addition, because the first support layer is formed by the U-shaped support wall 22 formed by filling gravel in a gabion box 221 and the U-shaped concrete platform 21, there are inevitably gaps between the wall gravel. Therefore, when the soil is locally deformed into the channel body, a certain amount of soil deformation can be absorbed, which makes the second layer of concrete less likely to crack or be damaged, and the channel support structure is more stable.

[0030] The concrete layer is preferably cast in situ.

[0031] Since the soil on both sides of the drainage channel is most susceptible to deformation and collapse, Figure 1 Preferably, the anchor rods 6 are arranged on both sides of the U-shaped support wall 22 to strengthen the support capability of the drainage channel side. In the figure, two rows of anchor rods 6 are arranged on each side, one row is arranged at the upper end of the side of the U-shaped support wall, and the other row is arranged at the lower end of the side of the U-shaped support wall.

[0032] Furthermore, the anchor rod 6 extends into the second supporting layer 3 and is welded to the steel mesh in the second supporting layer 3 .

[0033] like Figure 1 As shown, both sides of the U-shaped concrete platform 21 are provided with protrusions 211 extending along the width direction of the drainage channel body 1 and extending into the soil of the drainage channel body 1. The protrusions 211 can make the U-shaped concrete platform more firmly fixed.

[0034] If the spacing between the U-shaped concrete platforms 21 is too large, it will not ensure the structural stability of the first supporting layer, while if it is too small, the construction cost will increase. Through experiments, it was found that when the spacing between the U-shaped concrete platforms 21 is 8 to 12 meters, it can not only better ensure the structural stability of the first supporting layer, but also take into account the construction cost.

[0035] In the present invention, the thickness of the U-shaped supporting wall 22 is generally set to 1200-1500 mm to meet the supporting requirements.

[0036] The crushed stone particle size within the gabion cage 221 affects the adaptive deformation capacity of the U-shaped retaining wall 22. Experiments have shown that when the crushed stone particle size d within the gabion cage 221 is within a range of (d = (1.5-2.0)D, where D represents the aperture of the gabion cage 221), the adaptive deformation capacity is stronger, allowing it to better absorb soil deformation in later stages. The second concrete layer is less likely to crack or break during later use.

[0037] The specific construction method of the drainage channel structure of the geological disaster control project of the present invention is as follows:

[0038] Step 1: excavate the U-shaped drainage channel body and compact the soil around the excavated U-shaped drainage channel body;

[0039] Step 2: Install the U-shaped concrete platform 21 at the required position and fix the U-shaped concrete platform 21 with steel pipe piles 5;

[0040] Step 3: Place a gabion box 221 of corresponding size in the support wall cavity 11 and fill it with gravel to form a U-shaped support wall 22, and construct anchor rods 6 on the U-shaped support wall 22 until the first support layer is completed;

[0041] Step 4: constructing a waterproof geotextile 4 on the first supporting layer;

[0042] Step 5: pour concrete on the waterproof geotextile 4 to form the second supporting layer 3.

Claims

1. A drainage channel structure for a geological disaster control project, comprising an excavated U-shaped drainage channel body (1), wherein a channel body support structure is provided inside the drainage channel body (1), characterized in that: The channel support structure comprises a first support layer and a second support layer (3) arranged inside the first support layer; The first supporting layer comprises a U-shaped supporting wall (22) adapted to the U-shaped drainage channel body (1) and a U-shaped concrete platform (21); the U-shaped concrete platforms (21) are multiple and are arranged at intervals along the extension direction of the drainage channel body (1); the U-shaped concrete platforms (21) are fixed in the drainage channel body (1) by steel pipe piles (5) extending into the soil of the drainage channel body (1); a supporting wall setting cavity (11) is formed between adjacent U-shaped concrete platforms (21); the U-shaped supporting wall (22) is embedded in each of the supporting wall setting cavities (11) to form a first supporting layer with the U-shaped concrete platform (21); the U-shaped supporting wall (22) is formed by filling crushed stones in a gabion box (221); and the U-shaped supporting wall (22) is provided with an anchor rod (6) extending into the soil of the drainage channel body (1); The second supporting layer (3) is a concrete layer, and a waterproof geotextile (4) is provided between the second supporting layer (3) and the first supporting layer.

2. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: The anchor rods (6) are arranged on both side surfaces of the U-shaped supporting wall (22).

3. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: The anchor rod (6) extends into the second supporting layer (3) and is welded to the steel mesh in the second supporting layer (3).

4. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: Both sides of the U-shaped concrete platform (21) are respectively provided with protrusions (211) extending along the width direction of the drainage channel body (1) and extending into the soil of the drainage channel body (1).

5. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: The spacing between the U-shaped concrete platforms (21) is 8 to 12 meters.

6. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: The thickness of the U-shaped supporting wall (22) is between 1200 and 1500 mm.

7. The drainage channel structure for geological disaster control engineering according to claim 1, characterized in that: The crushed stone particle size filled in the gabion box (221) is d, d=(1.5-2.0)D, and D is the aperture of the gabion box (221).

8. The construction method of a drainage channel structure for a geological disaster control project according to any one of claims 1 to 7, characterized in that: include: Step 1: excavating the U-shaped drainage channel body (1) and compacting the soil around the excavated U-shaped drainage channel body; Step 2: Install a U-shaped concrete platform (21) at the required position and fix the U-shaped concrete platform (21) using steel pipe piles (5); Step 3: Place a gabion box (221) of corresponding size in the support wall cavity (11), fill it with crushed stones to form a U-shaped support wall (22), and construct anchor rods (6) on the U-shaped support wall (22) until the first support layer is completed; Step 4: laying a waterproof geotextile (4) on the first supporting layer; Step 5: pouring concrete on the waterproof geotextile (4) to form a second supporting layer (3).

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