A rigid-flexible combined anti-sliding reinforcement structure for thick landslide and its construction method

Abstract

The present invention discloses a rigid-flexible combined anti-sliding reinforcement structure and construction method for thick landslides, the structure comprises a plurality of long anti-sliding piles arranged at intervals on the landslide body, each long anti-sliding pile corresponds to a short buried pile, the short buried pile is located on the upper side of the landslide relative to the long anti-sliding pile, a connecting beam and a tension anchor are arranged between the long anti-sliding pile and the corresponding short buried pile, the top of the short buried pile is higher than the sliding surface where it is arranged, one end of the connecting beam is connected to the top of the short buried pile, and the other end is connected to the pile body of the long anti-sliding pile, one end of the tension anchor is connected to the end of the connecting beam located on one side of the short buried pile, and the other end is connected to the top of the long anti-sliding pile. By arranging a combined anti-sliding structure in a thick landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, low engineering investment, etc., and can effectively solve the technical difficulties of the difficulty of reinforcing a thick landslide body, especially for the foundation conditions with poor bedrock properties under the sliding body.

Description

Technical Field

[0001] The invention relates to the field of landslide reinforcement, in particular to a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslide 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. When the landslide is a thick landslide body, the traditional anti-slide reinforcement structure has high safety risks, long construction period, and high project investment. How to achieve the reinforcement of thick landslide bodies and safe and fast construction has become a technical problem that must be solved. In addition, when the rock properties of the underlying foundation of the landslide body are poor, the durability of the traditional anchor cable structure is difficult to meet the requirements, and the existing problems will become more prominent. Therefore, it is of great significance to propose a rigid-flexible combined anti-slide reinforcement structure for thick landslides. Summary of the invention

[0003] The purpose of the present invention is to provide a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslide and a construction method thereof in view of the problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A rigid-flexible combined anti-slip reinforcement structure for thick-layer landslides, comprising a plurality of long anti-slip piles arranged at intervals on the landslide body, each of the long anti-slip piles corresponding to a short buried pile, the short buried pile being located on the upper side of the landslide relative to the long anti-slip pile, a connecting beam and a tension anchor cable being provided between the long anti-slip pile and the corresponding short buried pile, the top of the short buried pile being higher than the sliding surface where it is provided, one end of the connecting beam being connected to the top of the short buried pile and the other end being connected to the pile body of the long anti-slip pile, one end of the tension anchor cable being connected to the end of the connecting beam located on one side of the short buried pile and the other end being connected to the top of the long anti-slip pile.

[0006] The long anti-slip piles described in the present application are "long" or "short" relative to the short buried piles. The length of the long anti-slip piles described in the present application is greater than the length of the short buried piles. The specific values ​​of the length of the long anti-slip piles and the length of the short buried piles are set according to the anti-slip capability requirements.

[0007] The thick-layer landslide rigid-flexible combined anti-slip reinforcement structure described in the present invention is adopted. The short buried piles arranged on the upper side of the sliding body have low cantilevers and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam can provide greater anti-slip force for the long anti-slip piles on the outside, and improve the cantilever height and force conditions of the long anti-slip piles. The setting of the connecting beam increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles to the long anti-slip piles, and serves as the inner anchoring foundation of the tension anchor cable, so that the anchor cable structure has good durability. The tension anchor cable can improve the stress state of the upper part of the long anti-sliding pile, and there is no need to increase the number of piles, thereby saving engineering investment. The tension anchor cable provides anchoring force through the connecting beam, and the tension can be greatly adjusted and is not controlled by the lithology. By arranging a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, low engineering investment, etc., which can effectively solve the technical difficulties in reinforcing deep landslide bodies, especially for foundation conditions with poor bedrock properties under the sliding body.

[0008] Preferably, the connecting beam is arranged horizontally.

[0009] Preferably, the distance between adjacent long anti-slide piles is 5m-8m.

[0010] Preferably, the distance between the long anti-slip pile and the corresponding short buried pile is 8m-15m.

[0011] Preferably, the top of the short buried pile is 3m-5m higher than the sliding surface where it is installed.

[0012] The present invention also provides a method for constructing a thick-layer landslide rigid-flexible combined anti-slip reinforcement structure as described in any one of the above items, comprising the following steps:

[0013] Step 1: The long anti-slip pile and the connecting beam are positioned in a plane, and a hole for the tension anchor is constructed at the position where the tension anchor is arranged on the top of the long anti-slip pile, and the bottom of the hole enters the end position of the connecting beam on one side of the short buried pile;

[0014] Step 2: placing the tension anchor cable into the borehole, with the top of the tension anchor cable exposed;

[0015] Step 3, excavating the long anti-slip pile well in sections, and setting the long anti-slip pile lock and wall protection structure in sections until the bottom elevation of the connecting beam is reached;

[0016] Step 4: construct the connecting beam well hole and set up well hole protective wall in sections;

[0017] Step 5: construct the short buried pile well and set up the short buried pile wall protection structure in sections;

[0018] Step 6: tying the short buried pile reinforcement cage in the pile well of the short buried pile, pouring the short buried pile concrete, and exposing the reinforcement at the top of the short buried pile;

[0019] Step 7: tying the steel cage of the connecting beam in the connecting beam well hole, and tying and fixing the main reinforcement of the steel cage of the connecting beam to the exposed reinforcement at the top of the short buried pile and the bottom end of the tension anchor cable;

[0020] Step 8: pouring the connecting beam concrete to a position 0.5m-1m away from the long anti-slide pile;

[0021] Step 9, excavating the long anti-sliding pile well below the height of the connecting beam, and setting up the retaining wall structure in sections to the pile bottom elevation;

[0022] Step 10, tying the long anti-slip pile steel cage, and the long anti-slip pile steel bars are fixedly connected to the exposed steel bars of the connecting beam;

[0023] Step 11: pouring concrete of the long anti-sliding pile and the remaining connecting beam to the top elevation of the long anti-sliding pile, burying a sleeve in the long anti-sliding pile at the position where the tension anchor cable passes, and the tension anchor cable passes through the sleeve and emerges outside the long anti-sliding pile;

[0024] Step 12: After the concrete strength of the long anti-slide pile reaches the designed strength, the tension anchor cable is tensioned and locked on the outer side of the top of the long anti-slide pile.

[0025] According to the construction method of a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslides described in the present invention, the short buried piles arranged on the upper side of the sliding body have a low cantilever and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam can provide a larger anti-slip force for the long anti-slip piles on the outside, and improve the cantilever height and stress conditions of the long anti-slip piles; the setting of the connecting beam increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles to the long anti-slip piles, and serves as a construction channel for constructing the short buried piles, and as an inner anchoring foundation for the tension anchor cable, so that the anchor cable structure has good durability; the tension anchor cable can be set The stress state of the upper part of the long anti-sliding pile is improved, and there is no need to increase the number of piles, thereby saving engineering investment. The tension anchor cable provides anchoring force through the connecting beam, and the tension can be greatly adjusted and is not controlled by the lithology of the stratum. By arranging a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, low engineering investment, etc., and can effectively solve the technical difficulties in reinforcing deep landslide bodies, especially for foundation conditions with poor bedrock properties under the sliding body. The proposed construction method ensures the effective realization of the function of the structure, and has the characteristics of safe and fast construction, environmental protection and conducive to promotion.

[0026] Preferably, the tension anchor cable protected by casing for corrosion protection is placed in the borehole.

[0027] Preferably, in step eleven, the sleeve is a PVC tube.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. In the thick-layer landslide rigid-flexible combined anti-slip reinforcement structure described in the present invention, the short buried piles arranged on the upper side of the sliding body have a low cantilever and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam can provide a larger anti-slip force for the long anti-slip piles on the outside, and improve the cantilever height and force conditions of the long anti-slip piles; the setting of the connecting beam increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles to the long anti-slip piles, and serves as the inner anchoring foundation of the tension anchor cable, so that the anchor cable structure has good durability; The tension anchor cable can improve the stress state of the upper part of the long anti-sliding pile, and there is no need to increase the number of piles, thereby saving engineering investment. The tension anchor cable provides anchoring force through the connecting beam, and the tension can be greatly adjusted and is not controlled by the stratum lithology. By setting a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, low engineering investment, etc., and can effectively solve the technical problem of the difficulty in reinforcing a deep landslide body, especially for the foundation conditions with poor properties of the bedrock under the sliding body.

[0030] 2. The method for constructing a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslides described in the present invention is that the short buried piles arranged on the upper side of the sliding body have a low cantilever and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam can provide a greater anti-slip force for the long anti-slip piles on the outside, and improve the cantilever height and force conditions of the long anti-slip piles; the setting of the connecting beam increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles to the long anti-slip piles, and serves as a construction channel for constructing the short buried piles, and as an inner anchoring foundation for the tension anchor cable, so that the anchor cable structure has good durability; the tension anchor cable arranged can In order to improve the stress state of the upper part of the long anti-sliding pile, there is no need to increase the number of piles, thereby saving engineering investment. The tension anchor cable provides anchoring force through the connecting beam, and the tension can be greatly adjusted and is not controlled by the lithology of the stratum. By arranging a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, low engineering investment, etc., and can effectively solve the technical difficulties in reinforcing deep landslide bodies, especially for foundation conditions with poor properties of bedrock under the sliding body. The proposed construction method ensures the effective realization of the functions of the structure, and has the characteristics of safe and fast construction, environmental protection and conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the rigid-flexible combined anti-sliding reinforcement structure for thick-layer landslides described in the present invention.

[0032] Icon: 1-long anti-slide pile, 2-short buried pile, 3-connecting beam, 4-tension anchor cable, 5-sliding surface. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0035] Example 1

[0036] like Figure 1 As shown, a thick layer landslide rigid-flexible combined anti-slide reinforcement structure described in the present invention comprises a plurality of long anti-slide piles 1 arranged at intervals on the landslide body, and the spacing between adjacent long anti-slide piles 1 is 5m-8m.

[0037] Each of the long anti-slip piles 1 is provided with a corresponding short buried pile 2, and the short buried pile 2 is located above the landslide relative to the long anti-slip pile 1, and the distance between the long anti-slip pile 1 and the corresponding short buried pile 2 is 8m-15m.

[0038] A connecting beam 3 and a tension anchor cable 4 are provided between the long anti-sliding pile 1 and the corresponding short buried pile 2, and the connecting beam 3 is arranged horizontally.

[0039] The top of the short buried pile 2 is higher than the sliding surface 5 where it is set. The top of the short buried pile 2 is 3m-5m higher than the sliding surface 5 where it is set.

[0040] One end of the connecting beam 3 is connected to the top of the short buried pile 2 , and the other end is connected to the body of the long anti-slip pile 1 .

[0041] One end of the tension anchor cable 4 is connected to the end of the connecting beam 3 located on one side of the short buried pile 2, and the other end is connected to the top of the long anti-slip pile 1. The top of the long anti-slip pile 1 is located at the ground line where it is set.

[0042] By using the thick-layer landslide rigid-flexible combined anti-slip reinforcement structure described in the present invention, the short buried piles 2 arranged on the upper side of the sliding body have a low cantilever and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam 3 can provide a larger anti-slip force for the long anti-slip piles 1 on the outside, and improve the cantilever height and stress conditions of the long anti-slip piles 1; the setting of the connecting beam 3 increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles 2 to the long anti-slip piles 1, and serves as the inner anchoring foundation of the tension anchor cable 4, making the anchor cable structure durable; the tension anchor cable 4 is set The anchor cable 4 can improve the stress state of the upper part of the long anti-sliding pile 1, and there is no need to increase the number of piles, thereby saving engineering investment. The tension anchor cable 4 provides anchoring force through the connecting beam 3, and the tension can be greatly adjusted. The durability problem can be simply solved by setting a casing and is not controlled by the lithology of the formation. By setting a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, and low engineering investment. It can effectively solve the technical difficulties of reinforcing deep landslide bodies, especially for foundation conditions with poor properties of the bedrock under the sliding body.

[0043] Example 2

[0044] like Figure 1 As shown, the method for constructing a thick-layer landslide rigid-flexible combined anti-slip reinforcement structure as described in Example 1 of the present invention comprises the following steps:

[0045] Step 1: The long anti-slip pile 1 and the connecting beam 3 are positioned in a plane, and a hole for the tension anchor cable 4 is drilled at the position where the tension anchor cable 4 is set on the top of the long anti-slip pile 1, and the bottom of the drill hole enters the end position of the connecting beam 3 on one side of the short buried pile 2 by more than or equal to 1m;

[0046] Step 2: Put the tension anchor cable 4 protected by casing into the borehole, and the top of the tension anchor cable 4 is exposed to a depth of more than or equal to 2m;

[0047] Step 3, excavating the long anti-slip pile 1 well in sections, and setting the locking mouth and the wall protection structure of the long anti-slip pile 1 in sections until the bottom elevation position of the connecting beam 3 is reached;

[0048] Step 4: construct the connecting beam 3 well hole and set up well hole protective wall in sections;

[0049] Step 5: construct the short buried pile 2 pile well, and set the short buried pile 2 wall protection structure in sections;

[0050] Step 6: Tie up the steel cage of the short buried pile 2 in the pile well of the short buried pile 2, pour the concrete of the short buried pile 2, and the main steel bar on the top of the short buried pile 2 is exposed from the connecting beam 3 by more than or equal to 1m;

[0051] Step 7: Tie the steel cage of the connecting beam 3 in the well hole of the connecting beam 3, and tie and fix the main reinforcement of the steel cage of the connecting beam 3 to the exposed reinforcement at the top of the short buried pile 2 and the bottom end of the tension anchor cable 4;

[0052] Step 8: pouring concrete of the connecting beam 3 to a position 0.5m-1m away from the long anti-slide pile 1;

[0053] Step nine, excavating the long anti-sliding pile 1 below the height of the connecting beam 3, and setting up the retaining wall structure in sections to the pile bottom elevation;

[0054] Step 10: Tie up the steel cage of the long anti-slip pile 1, and fix the steel bars of the long anti-slip pile 1 to the exposed steel bars of the connecting beam 3;

[0055] Step 11: pour concrete of the long anti-sliding pile 1 and the remaining connecting beam 3 to the top elevation of the long anti-sliding pile 1, bury a PVC pipe at the position where the tension anchor cable 4 passes through the long anti-sliding pile 1, and the tension anchor cable 4 passes through the PVC pipe and is exposed outside the long anti-sliding pile 1 by more than or equal to 1.5m;

[0056] Step 12: After the concrete strength of the long anti-sliding pile 1 reaches the designed strength, the tension anchor cable 4 is tensioned and locked on the outer side of the top of the long anti-sliding pile 1, and a protective anchor head is set.

[0057] By using the construction method of a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslides described in the present invention, the short buried piles 2 arranged on the upper side of the sliding body have a low cantilever and are mainly buried in the lower part of the sliding body. Therefore, the connecting beam 3 can provide a larger anti-slip force for the long anti-slip piles 1 on the outside, and improve the cantilever height and stress conditions of the long anti-slip piles 1; the setting of the connecting beam 3 increases the integrity of the combined anti-slip structure, transfers the resistance of the short buried piles 2 to the long anti-slip piles 1, and at the same time serves as a construction channel for constructing the short buried piles 2, and serves as the inner anchoring foundation of the tension anchor cable 4, so that the anchor cable structure has good durability; the tension anchor cable 4 can improve the The stress state of the upper part of the long anti-sliding pile 1 does not require the additional number of piles, thereby saving engineering investment. The tension anchor cable 4 provides anchoring force through the connecting beam 3, and the tension can be greatly adjusted. The durability problem can be simply solved by setting a casing and is not controlled by the stratum lithology. By setting a combined anti-sliding structure in a deep landslide body, it has the characteristics of good integrity, strong anti-sliding ability, good structural stress state, and low engineering investment. It can effectively solve the technical difficulties in reinforcing deep landslide bodies, especially for foundation conditions with poor bedrock properties under the sliding body. The proposed construction method ensures the effective realization of the functions of the structure, and has the characteristics of safe and fast construction, environmental protection, and conducive to promotion.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for constructing a rigid-flexible combined anti-slip reinforcement structure for thick-layer landslides, characterized in that: The thick-layer landslide rigid-flexible combined anti-sliding reinforcement structure comprises a plurality of long anti-sliding piles (1) arranged at intervals on the landslide body, each of the long anti-sliding piles (1) correspondingly being provided with a short buried pile (2), the short buried pile (2) being located on the upper side of the landslide relative to the long anti-sliding pile (1), a connecting beam (3) and a tension anchor cable (4) being provided between the long anti-sliding pile (1) and the corresponding short buried pile (2), the top of the short buried pile (2) being higher than the sliding surface (5) where it is provided, one end of the connecting beam (3) being connected to the top of the short buried pile (2) and the other end being connected to the pile body of the long anti-sliding pile (1), one end of the tension anchor cable (4) being connected to the end of the connecting beam (3) located on one side of the short buried pile (2) and the other end being connected to the top of the long anti-sliding pile (1); The method comprises the following steps: Step 1: the long anti-slip pile (1) and the connecting beam (3) are positioned in a plane, a hole for the tension anchor cable (4) is drilled at the position where the tension anchor cable (4) is set at the top of the long anti-slip pile (1), and the bottom of the drill hole enters the end position of the connecting beam (3) on one side of the short buried pile (2); Step 2: placing the tension anchor cable (4) into the drill hole, with the top of the tension anchor cable (4) exposed; Step 3, excavating the long anti-slip pile (1) well in sections, and setting the long anti-slip pile (1) locking mouth and wall protection structure in sections until the bottom elevation position of the connecting beam (3) is reached; Step 4: construct the well hole of the connecting beam (3) and set up well hole protective wall in sections; Step 5: constructing the short buried pile (2) well and arranging the short buried pile (2) wall protection structure in sections; Step 6: tying the steel cage of the short buried pile (2) in the pile well of the short buried pile (2), pouring the concrete of the short buried pile (2), and exposing the steel bars at the top of the short buried pile (2); Step 7: tying the steel cage of the connecting beam (3) in the well hole of the connecting beam (3), and tying and fixing the main reinforcement of the steel cage of the connecting beam (3) to the exposed reinforcement at the top of the short buried pile (2) and the bottom end of the tension anchor cable (4); Step 8: pouring concrete of the connecting beam (3) to a position 0.5m-1m away from the long anti-sliding pile (1); Step 9, excavating the long anti-sliding pile (1) well below the height of the connecting beam (3), and setting up the wall protection structure in sections to the pile bottom elevation; Step 10: tying the steel cage of the long anti-slip pile (1), and the steel bars of the long anti-slip pile (1) are fixedly connected to the exposed steel bars of the connecting beam (3); Step 11: pouring concrete of the long anti-sliding pile (1) and the remaining connecting beam (3) to the top elevation of the long anti-sliding pile (1), burying a sleeve at the position where the tension anchor cable (4) passes through the long anti-sliding pile (1), and the tension anchor cable (4) passes through the sleeve and emerges outside the long anti-sliding pile (1); Step 12: After the concrete strength of the long anti-sliding pile (1) reaches the designed strength, the tension anchor cable (4) is tensioned and locked on the outer side of the top of the long anti-sliding pile (1).

2. The construction method according to claim 1, characterized in that: The connecting beam (3) is arranged horizontally.

3. The construction method according to claim 1, characterized in that: The distance between adjacent long anti-slip piles (1) is 5m-8m.

4. The construction method according to claim 1, characterized in that: The distance between the long anti-sliding pile (1) and the corresponding short buried pile (2) is 8m-15m.

5. The construction method according to claim 1, characterized in that: The top of the short buried pile (2) is 3m-5m higher than the sliding surface (5) where it is set.

6. The construction method according to claim 1, characterized in that: In the step 2, the tension anchor cable (4) protected by casing corrosion is placed in the borehole.

7. The construction method according to any one of claims 1 to 6, characterized in that: In the step eleven, the sleeve is a PVC tube.

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