A tunnel-anchor-pile combined anti-slip reinforcement structure and construction method thereof

Abstract

The present invention relates to the field of landslide reinforcement engineering, and in particular to a combined anti-slip reinforcement structure of a cave, anchor, and pile, and a construction method thereof, wherein the combined anti-slip reinforcement structure of a cave, anchor, and pile comprises a cave structure, which is perpendicular to the main axis section of the landslide body and buried in the rock and soil below the sliding surface; an anti-slip pile, which is arranged in the landslide body on the lower side of the cave structure and extends into the rock and soil; and a tension anchor cable, which is connected to the cave structure at one end and to the upper part of the anti-slip pile at the other end. In the combined anti-slip reinforcement structure of a cave, anchor, and pile described in the present invention, the cave structure provides long-term, durable, stable, and large tension to the upper part of the anti-slip pile through the tension anchor cable, thereby improving the stress state of the anti-slip pile while effectively reinforcing a giant landslide, thereby reducing the design size of the anti-slip pile, thereby reducing both construction safety risks and construction costs.

Description

Technical Field

[0001] The invention relates to the field of landslide reinforcement engineering, in particular to a tunnel-anchor-pile combined anti-slip reinforcement structure and a construction method thereof. Background Art

[0002] Landslides are widely distributed in mountainous areas of my country. When the stability of landslides is low and endangers the safety of construction projects or personnel and property, the landslide body needs to be reinforced.

[0003] like Figure 1 As shown, the landslide body 9 and the rock and soil body 8 are separated by the sliding surface 7 .

[0004] When the landslide is a large and deep landslide, traditional anti-slide pile measures require the use of multiple rows of deep and long cross-section piles, which has high construction safety risks and high project investment.

[0005] By combining anti-sliding piles with anchor cables, the anchor cables can greatly improve the stress of the anti-sliding piles. However, under the action of large resistance, the anchoring force between the anchor body and the surrounding rock and soil 8 will continue to deteriorate due to environmental changes, especially the action of water, causing the reliability to continue to decrease. When the properties of the rock and soil 8 in the anchoring section are poor, the anchor cable structure should not be used. Summary of the Invention

[0006] The purpose of the present invention is to provide a combined anti-slip reinforcement structure of a tunnel, anchor and pile and its construction method, which can be durable for a long time, stably reinforce the slope, and reduce the construction safety risk and project investment.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A combined anti-slip reinforcement structure of a tunnel, anchor and pile, comprising:

[0009] The tunnel structure is buried in the rock and soil below the sliding surface;

[0010] Anti-slide piles are arranged in the landslide mass below the tunnel structure and extend into the rock and soil mass;

[0011] A tension anchor cable has one end connected to the tunnel structure and the other end connected to the upper part of the anti-slip pile.

[0012] The present invention describes a combined anti-slip reinforcement structure consisting of a tunnel, anchor, and pile. This structure is reinforced and fixed within the stable rock mass below the sliding surface above the landslide. The tunnel structure, through tension anchors, provides long-term, stable, and high tension to the upper portion of the anti-slip piles. This effectively reinforces large landslides while improving the stress state of the anti-slip piles, thereby reducing their design dimensions and lowering both construction safety risks and costs. The tunnel structure, perpendicular to the sliding surface, is positioned below the sliding surface, serving as a fixed foundation structure and providing significant anchoring force for the anti-slip piles.

[0013] In summary, the anti-slip reinforcement structure of the tunnel-anchor-pile combination described in the present invention can be durable for a long time, stably reinforce the slope, and reduce construction safety risks and project investment.

[0014] Preferably, an anchor structure is provided in the rock and soil on a side of the cave structure away from the anti-slide pile, and the anchor structure is fixedly connected to the cave structure, which can greatly enhance the tensile stability of the cave structure.

[0015] Preferably, a construction passage is connected between the cave structure and the slope surface of the landslide body, and the construction passage serves as a construction passage for the cave structure, the anchor structure and the anti-slip key.

[0016] Preferably, an anti-slip key is provided in the construction channel, the anti-slip key is connected to the tunnel structure, the anti-slip key passes through the sliding surface, and the anti-slip key is constructed using the existing construction channel, which can bear part of the landslide thrust, with low investment and good effect.

[0017] Preferably, the construction channel is arranged vertically.

[0018] Preferably, the tension anchor is fixedly connected to the tunnel structure and the anti-slip pile respectively. The tension anchor is fixedly connected to the tunnel structure and the anti-slip pile at both ends, avoiding the problems of force relaxation loss and unreliable durability.

[0019] The present invention also discloses a construction method for forming the tunnel-anchor-pile combined anti-slip reinforcement structure, comprising the following steps:

[0020] S1. Excavate a construction channel until the bottom elevation of the tunnel structure;

[0021] S2. Excavating a well hole for the structure of the tunnel, and positioning the anti-slide pile plane, drilling a tension anchor cable at the upper portion of the anti-slide pile, and passing the drill hole through the well hole for the structure of the tunnel, and placing the tension anchor cable in the tension anchor cable drill hole;

[0022] S3. The tunnel structure and the anti-slide pile construction are respectively carried out, and the tension anchor cables are connected to the upper portion of the tunnel structure and the anti-slide pile;

[0023] S4. After the anti-slide piles are constructed, the tension anchor cables are tensioned and locked.

[0024] The construction method for forming the anti-slip reinforcement structure of the cave-anchor-pile combination described in the present invention can realize the construction of the anti-slip reinforcement structure of the cave-anchor-pile combination, which is safe, and the cave structure construction and the anti-slip pile construction do not interfere with each other. The construction speed is fast, thereby reducing construction costs.

[0025] Preferably, after the tunnel structure is constructed, an anti-slip key is constructed in the construction channel to connect the anti-slip key to the tunnel structure.

[0026] Preferably, step S is specifically:

[0027] S21. Excavate the well structure and install the well enclosure structure;

[0028] S22. Position the anti-slide piles on the slope of the landslide body, drill holes for tension anchor cables in a directional manner at the upper portion of the anti-slide piles, and allow the holes to pass through the wellbore structure;

[0029] S23. Place the tension anchor cable in the tension anchor cable drill hole.

[0030] Preferably, when the cave structure is connected to an anchor structure, the anchor structure is constructed within the wellbore retaining structure.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. This application discloses a combined anti-slip reinforcement structure of a tunnel, anchor, and pile. The tunnel structure utilizes tension anchors to provide long-term, stable, and high tension to the upper portion of the anti-slip piles. This structure improves the stress state of the anti-slip piles while effectively reinforcing large landslides, thereby reducing the design dimensions of the anti-slip piles and lowering both construction safety risks and construction costs. This structure provides long-term, stable reinforcement of slopes while reducing construction safety risks and project investment.

[0033] 2. The present application discloses a combined anti-slip reinforcement structure of a cavern, anchor, and pile. An anchor structure is provided in the rock and soil mass on the rear edge of the landslide. The anchor structure is fixedly connected to the cavern structure, thereby greatly enhancing the tensile stability and durability of the cavern structure.

[0034] 3. The present application relates to a combined anti-slip reinforcement structure of a tunnel, anchor, and pile. A construction passage is connected between the tunnel structure and the slope of the landslide body. The construction passage serves as a construction passage for the tunnel structure, anchor structure, and anti-slip key.

[0035] 4. This application discloses a combined tunnel-anchor-pile anti-slip reinforcement structure. An anti-slip key is provided in the construction channel, connected to the tunnel structure, and its top extends through the sliding surface. The anti-slip key utilizes the existing construction channel to absorb some of the landslide thrust, resulting in low investment and high effectiveness.

[0036] 5. In the present application, a combined tunnel-anchor-pile anti-slip reinforcement structure comprises a tension anchor cable fixedly connected to the tunnel structure and the upper portion of the anti-slip pile. The tension anchor cable's ends are fixedly connected to the tunnel structure and the anti-slip pile, avoiding problems such as force loss and unreliable durability.

[0037] 6. The construction method for forming the anti-slip reinforcement structure of the cavern-anchor-pile combination described in the present invention can realize the construction of the anti-slip reinforcement structure of the cavern-anchor-pile combination, which is safe, and the cave structure construction and the anti-slip pile construction do not interfere with each other. The construction speed is fast, thereby reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a cross-sectional schematic diagram of the structure of a landslide body in the prior art;

[0039] Figure 2 A schematic cross-sectional view of a combined anti-slip reinforcement structure of a tunnel-anchor-pile according to the present invention;

[0040] Figure 3 Schematic diagram of the connection structure of the cave structure and the anti-slip pile of the present invention;

[0041] Markings in the figure: 1-tunnel structure, 2-anchor structure, 3-anti-slide pile, 4-tension anchor cable, 5-construction channel, 6-anti-slide key, 7-sliding surface, 8-rock and soil mass, 9-landslide mass. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below with reference to the accompanying drawings.

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] Example 1

[0045] like Figure 2 and 3As shown, the present embodiment describes a combined anti-slip reinforcement structure of a cavern-anchor-pile, comprising: a cavern structure 1, arranged perpendicular to the main axis section of the landslide, and buried below the sliding surface 7; an anchor structure 2, arranged in the rock mass 8 on the rear edge side of the cavern structure 1 close to the landslide, and fixedly connected to the cavern structure 1; anti-slip piles 3, arranged in the landslide mass 9 on the lower side of the cavern structure 1; tension anchor cables 4, both ends of which are fixed between the cavern structure 1 and the top of the anti-slip piles 3; a construction channel 5, arranged between the cavern structure 1 and the landslide surface; and an anti-slip key 6, the bottom of which is fixedly connected to the cavern structure 1, and the top of which is higher than the sliding surface 7.

[0046] On the basis of the above, a further preferred method is that the cave structure 1 is cast with reinforced concrete, the diameter is generally not less than 2.0m, and it is buried not less than 2m below the sliding surface 7; the anchor structure 2 can be an anchor rod or anchor cable structure, the length is generally not less than 8m; the construction channel 5 is generally set at a spacing of 20m.

[0047] The beneficial effects of this embodiment are as follows: by setting an anchor structure 2 in the stable rock mass 8 below the sliding surface 7 above the landslide to strengthen the fixed cave structure 1, the cave structure 1 can provide long-term durability, stable and large tension for the anti-sliding piles 3 through the tension anchor cable 4, thereby improving the stress of the anti-sliding piles 3 and effectively reinforcing the giant landslide. The tunnel structure 1 is vertically positioned below the sliding surface 7, providing a strong anchoring force for the anti-slide piles 3 as a fixed foundation structure. The anchor structure 2 significantly enhances the tensile stability of the tunnel structure 1. The anti-slide piles 3 serve as a reinforcement for large landslides. The tension anchor cables 4 transmit the significant anchoring force to the anti-slide piles 3, improving the stress state of the anti-slide piles 3. The tension anchor cables 4 are fixedly connected to the tunnel structure 1 and the anti-slide piles 3 at both ends, avoiding force loss and unreliable durability. The construction channel 5 serves as a construction channel for the tunnel structure 1, anchor structure 2, and anti-slide key 6. The anti-slide key 6 utilizes the existing construction channel 5 to absorb a portion of the landslide thrust, resulting in low investment and high effectiveness. The proposed construction method ensures the successful, safe, rapid, and environmentally friendly implementation of the structure and is conducive to its widespread adoption.

[0048] Example 2

[0049] like Figure 2 and 3 As shown, the construction method for forming a tunnel-anchor-pile combined anti-slip reinforcement structure as described in Example 1 in this embodiment includes the following steps:

[0050] A. Plane positioning of construction channel 5, excavation of construction channel 5 pile pits in sections, and installation of retaining walls in sections until the bottom elevation of cave structure 1 is reached;

[0051] B. Excavate the well structure 1 on both sides through the construction channel 5, and set up the well structure enclosure structure in sections;

[0052] C. Construct anchor structure 2 inside the well enclosure structure of tunnel structure 1, with the exposed length of anchor structure 2 in the well being hole being no less than 1.5m;

[0053] D. Plane positioning of the anti-slip pile 3, directionally constructing a hole for the tension anchor cable 4 at the top of the anti-slip pile 3, with the bottom of the hole passing through the wellbore retaining structure of the tunnel structure 1;

[0054] E. Place the tension anchor cable 4 with casing protection into the tension anchor cable 4 borehole, with the bottom of the tension anchor cable 4 entering the cave structure 1 by no less than 1.5m and the top exposed by no less than 2.0m;

[0055] F. Tie up the steel cage of the cave structure 1, securely connect the main steel bars to the exposed portions of the anchor structure 2 and the tension anchor cable 4, embed the main steel bars at the bottom of the anti-slip key 6 with a depth of no less than 2.0 m, securely connect them to the steel cage of the cave structure 1, and pour concrete for the cave structure 1;

[0056] G. Tie the anti-slip key 6 steel cage, fix it to the embedded steel bars, and pour the anti-slip key 6 concrete;

[0057] H. Fill the construction channel 5 at the top of the anti-sliding key 6 with backfill soil in layers until it reaches the top of the landslide body 9;

[0058] I. Excavate 3 anti-slip pile wells and install pile well retaining walls in sections until the pile bottom elevation is reached;

[0059] J. Tie up the anti-slide pile 3 steel cage, pre-embed the PVC pipe where the tension anchor cable 4 passes, and let the tension anchor cable 4 pass through the PVC pipe and be exposed above the ground;

[0060] K. pouring concrete for anti-slide pile 3;

[0061] L. After the concrete of the anti-slide pile 3 reaches the design strength, tension and lock the tension anchor cable 4;

[0062] M. Construct the next section of the composite structure.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A combined anti-slip reinforcement structure of a tunnel, anchor and pile, characterized in that: include: A tunnel structure (1) is buried in a rock mass (8) below a sliding surface (7); Anti-slide piles (3) are arranged in the landslide body (9) below the cave structure (1) and extend into the rock and soil body (8); A tension anchor cable (4), one end of which is connected to the cave structure (1), and the other end of which is connected to the upper part of the anti-slip pile (3); An anchor structure (2) is provided in the rock mass (8) on the side of the cave structure (1) away from the anti-slide pile (3), and the anchor structure (2) is fixedly connected to the cave structure (1); The cave structure (1) and the anti-slide pile (3) are spaced apart, and the cave structure (1) is stretched and arranged perpendicular to the main axis section of the landslide.

2. The anti-slip reinforcement structure of a tunnel-anchor-pile combination according to claim 1, characterized in that: A construction passage (5) is connected between the cave structure (1) and the slope surface of the landslide body (9).

3. The anti-slip reinforcement structure of a tunnel-anchor-pile combination according to claim 2, characterized in that: An anti-sliding key (6) is provided in the construction channel (5), the anti-sliding key (6) is connected to the cave structure (1), and the anti-sliding key (6) passes through the sliding surface (7).

4. The anti-slip reinforcement structure of a tunnel-anchor-pile combination according to claim 2, characterized in that: The construction channel (5) is arranged vertically.

5. The tunnel-anchor-pile combined anti-slip reinforcement structure according to claim 1, characterized in that: The tension anchor cable (4) is fixedly connected to the cave structure (1) and the anti-slip pile (3) respectively.

6. A construction method for forming the tunnel-anchor-pile combined anti-slip reinforcement structure according to any one of claims 2 to 4, characterized in that: The following steps are involved: S1. Excavating a construction channel (5) until the bottom elevation of the tunnel structure (1); S2. Excavating a well hole for the structure, and performing plane positioning of the anti-slip pile (3), drilling a tension anchor cable at the top position of the anti-slip pile (3), and passing the drill hole through the well hole for the structure, and placing the tension anchor cable (4) in the tension anchor cable drill hole; S3. The cave structure (1) and the anti-slide pile (3) are constructed separately, and the tension anchor cable (4) is connected to the upper portion of the cave structure (1) and the anti-slide pile (3), respectively; S4. After the anti-slip pile (3) is constructed, the tension anchor cable (4) is tensioned and locked.

7. The construction method according to claim 6, characterized in that: After the cave structure (1) is constructed, an anti-sliding key (6) is constructed in the construction channel (5) to connect the anti-sliding key (6) to the cave structure (1).

8. The construction method according to claim 6 or 7, characterized in that: Step S2 is specifically as follows: S21. Excavate the well structure and install the well enclosure structure; S22. Positioning the anti-slide pile (3) in a plane on the slope of the landslide body (9), drilling a tension anchor cable in a directional manner at the top of the anti-slide pile (3), and passing the drill hole through the well hole of the cave structure; S23. Place the tension anchor cable (4) in the tension anchor cable drill hole.

9. The construction method according to claim 8, characterized in that: When the cave structure (1) is connected to an anchor structure (2), the anchor structure (2) is constructed within the well enclosure structure.

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