CN111236279A - Underground cave-anchor-pile combined anti-sliding reinforcing structure and construction method thereof - Google Patents
Underground cave-anchor-pile combined anti-sliding reinforcing structure and construction method thereof Download PDFInfo
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- CN111236279A CN111236279A CN202010188605.3A CN202010188605A CN111236279A CN 111236279 A CN111236279 A CN 111236279A CN 202010188605 A CN202010188605 A CN 202010188605A CN 111236279 A CN111236279 A CN 111236279A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention relates to the field of landslide reinforcement engineering, in particular to an underground cave-anchor-pile combined anti-slide reinforcement structure and a construction method thereof, wherein the underground cave-anchor-pile combined anti-slide reinforcement structure comprises an underground cave structure, is vertical to the section of a main shaft of a landslide body and is embedded in a rock-soil body below a sliding surface; the anti-slide pile is arranged in the slip mass on the lower side of the underground structure and extends into a rock-soil body; and one end of the tension anchor cable is connected with the underground structure, and the other end of the tension anchor cable is connected with the upper part of the anti-slide pile. According to the underground cave-anchor-pile combined anti-slip reinforcing structure, the underground cave structure provides long-term durable and stable large pulling force for the upper part of the anti-slip pile through the pulling anchor cable, so that the stress state of the anti-slip pile can be improved under the condition of effectively reinforcing a huge landslide, the design size of the anti-slip pile can be reduced, the construction safety risk is reduced, and the construction cost is reduced.
Description
Technical Field
The invention relates to the field of landslide reinforcement engineering, in particular to an underground-anchor-pile combined anti-slip reinforcement structure and a construction method thereof.
Background
Landslides are distributed in a large number in mountainous areas of China, and when stability of the landslides is low and endangers construction projects or safety of personnel and property, landslides need to be reinforced.
As shown in fig. 1, the sliding surface 7 is a boundary between the sliding mass 9 and the rock-soil mass 8.
When the landslide is a huge deep landslide body, the traditional anti-slide pile measures need to adopt a plurality of rows of deep long large-section piles, so that the construction safety risk is high, and the engineering investment is high;
by adopting the measure of combining the slide-resistant piles with the anchor cables, the stress of the slide-resistant piles can be greatly improved by the anchor cables, but the anchoring force of the anchoring bodies of the anchor cables and the surrounding rock-soil bodies 8 can be continuously deteriorated under the action of large resistance force due to the action of environmental change, particularly water, so that the reliability can be continuously reduced, and when the property of the rock-soil bodies 8 at the anchoring section is poor, the anchor cable structure is not suitable for being adopted.
Disclosure of Invention
The invention aims to: aiming at the problems of high construction safety risk and high engineering investment when the landslide body is reinforced by adopting anti-slide pile measures in the prior art; the method has the advantages that the reliability is continuously reduced due to the fact that the measure that the slide-resistant piles are combined with the anchor cables is adopted, and the underground-anchor-pile combined slide-resistant reinforcing structure and the construction method thereof are provided, so that the underground-anchor-pile combined slide-resistant reinforcing structure can be durable for a long time, stably reinforce a slope body, and reduce construction safety risk and engineering investment.
In order to achieve the purpose, the invention adopts the technical scheme that:
a cave-anchor-pile combination antiskid reinforced structure includes:
the underground structure is embedded in a rock-soil body below the sliding surface;
the anti-slide pile is arranged in a slide mass on the lower side of the underground structure and extends into the rock-soil mass;
and one end of the tension anchor cable is connected with the underground structure, and the other end of the tension anchor cable is connected with the upper part of the anti-slide pile.
According to the cave-anchor-pile combined anti-sliding reinforcing structure, the cave structure for reinforcing and fixing is arranged in the stable rock-soil body below the sliding surface above the landslide, and the cave structure can provide long-term durable and stable large pulling force for the upper part of the anti-sliding pile through the pulling anchor cable, so that under the condition of effectively reinforcing the huge landslide, the stress state of the anti-sliding pile can be improved, the design size of the anti-sliding pile can be reduced, the construction safety risk is reduced, and the construction cost is reduced. The underground structure vertical sliding surface is arranged below the sliding surface in a pulling-through mode and serves as a large fixed foundation structure, and large anchoring force can be provided for the slide-resistant pile.
In conclusion, the underground cave-anchor-pile combined anti-sliding reinforcing structure can be durable for a long time, stably reinforce a slope body, and reduce the construction safety risk and the engineering investment.
Preferably, the underground structure is far away from be provided with the anchor structure in the geotechnical body of one side of slide-resistant pile, anchor structure and underground structure fixed connection can strengthen the underground structure tensile stability greatly.
Preferably, a construction channel is communicated between the underground structure and the slope surface of the slip mass, and the construction channel is used as a construction channel of the underground structure, the anchor structure and the anti-slip key.
Preferably, the construction channel is internally provided with an anti-sliding key, the anti-sliding key is connected with the underground structure, the anti-sliding key penetrates through the sliding surface, the anti-sliding key is constructed by utilizing the existing construction channel, part of landslide thrust can be borne, the investment is low, and the effect is good.
Preferably, the construction channel is vertically arranged.
Preferably, the tension anchor cable is fixedly connected with the underground structure and the slide-resistant pile respectively. The two ends of the tension anchor cable are fixedly connected with the underground structure and the slide-resistant pile, so that the problems of force relaxation loss and unreliable durability are avoided.
The invention also discloses a construction method for forming the underground-anchor-pile combined anti-sliding reinforcing structure, which comprises the following steps:
s1, excavating a construction channel until the elevation of the bottom of the underground structure;
s2, excavating a cave structure well, carrying out plane positioning on the slide-resistant pile, constructing a tension anchor cable drilling hole at the upper part of the slide-resistant pile, enabling the drilling hole to penetrate through the cave structure well, and placing the tension anchor cable in the tension anchor cable drilling hole;
s3, respectively carrying out construction of the underground structure and construction of the slide-resistant pile, and respectively connecting the tension anchor cable with the upper parts of the underground structure and the slide-resistant pile;
and S4, after the anti-slide pile is constructed, tensioning and locking the tension anchor cable.
The construction method for forming the underground cave-anchor-pile combined anti-sliding reinforcing structure can realize the construction of the underground cave-anchor-pile combined anti-sliding reinforcing structure, is safe, does not interfere with the construction of the underground cave structure and the construction of the anti-sliding pile, and has high construction speed, thereby reducing the construction cost.
Preferably, after the construction of the underground structure, the construction of the anti-sliding key is carried out on the construction channel, so that the anti-sliding key is connected with the underground structure.
Preferably, step S is specifically:
s21, excavating a cave structure and arranging a cave enclosure structure;
s22, carrying out plane positioning on the slide-resistant pile on the slope surface of the slide mass, directionally constructing a tension anchor cable drill hole at the upper part of the slide-resistant pile, and enabling the drill hole to penetrate through the cave structure well hole;
s23, placing the tension anchor cable in the tension anchor cable drilling hole.
Preferably, when the underground structure is connected with an anchor structure, the anchor structure is constructed in the well hole enclosing structure.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the underground cave-anchor-pile combined anti-sliding reinforcing structure, long-term durable and stable large pulling force is provided for the upper part of an anti-sliding pile through the pulling anchor cable, so that the stress state of the anti-sliding pile can be improved under the condition of effectively reinforcing a huge landslide, the design size of the anti-sliding pile can be reduced, the construction safety risk is reduced, and the construction cost is reduced. The method can be durable for a long time, stably reinforce the slope body, and reduce the construction safety risk and the engineering investment.
2. The utility model provides a cave-anchor-stake combination antiskid reinforced structure, cave structure is provided with the anchor structure in leaning on the rock-soil body of landslide trailing edge side, anchor structure and cave structure fixed connection, strengthen cave structure tensile stability and durability greatly.
3. The application discloses a cave-anchor-stake combination antiskid reinforced structure, intercommunication has the construction passageway between cave structure and the slip mass domatic, and the construction passageway is as the construction passageway of cave structure, anchor structure and anti-sliding key. .
4. The application discloses anti-skidding reinforced structure of cave-anchor-stake combination, be provided with anti-skidding key in the construction passageway, anti-skidding key with the cave structure is connected, anti-skidding key top runs through the glide plane. The anti-sliding key is constructed by utilizing the existing construction channel, can bear part of landslide thrust, and has low investment and good effect.
5. According to the underground cave-anchor-pile combined anti-sliding reinforcing structure, the tension anchor cable is fixedly connected with the underground cave structure and the upper portion of the anti-sliding pile respectively. The two ends of the tension anchor cable are fixedly connected with the underground structure and the slide-resistant pile, so that the problems of force relaxation loss and unreliable durability are avoided.
6. The construction method for forming the underground cave-anchor-pile combined anti-sliding reinforcing structure can realize the construction of the underground cave-anchor-pile combined anti-sliding reinforcing structure, is safe, does not interfere with the construction of the underground cave structure and the construction of the anti-sliding pile, and has high construction speed, thereby reducing the construction cost.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art construction of a slip mass;
fig. 2 is a schematic cross-sectional view of a combined underground cave-anchor-pile skid-resistant reinforcing structure of the present invention;
fig. 3 is a schematic view of the connection structure of the underground structure and the slide-resistant pile of the present invention;
the labels in the figure are: 1-cave structure, 2-anchor structure, 3-slide-resistant pile, 4-tension anchor cable, 5-construction channel, 6-slide-resistant key, 7-sliding surface, 8-rock-soil body and 9-sliding slope body.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 2 and 3, the slip-resistant reinforcing structure of the tunnel-anchor-pile combination according to the present embodiment includes: the underground structure 1 is arranged perpendicular to the section of the main shaft of the landslide and is embedded below the sliding surface 7; the anchor structure 2 is arranged in a rock-soil body 8 on the side of the underground structure 1 close to the rear edge of the landslide and is fixedly connected with the underground structure 1; the anti-slide pile 3 is arranged in a slide mass 9 on the lower side of the underground structure 1; two ends of the tension anchor cable 4 are fixed between the underground structure 1 and the top of the slide-resistant pile 3; the construction channel 5 is arranged between the underground structure 1 and the landslide slope surface; and the bottom of the anti-sliding key 6 is fixedly connected with the underground structure 1, and the top of the anti-sliding key is higher than the sliding surface 7.
On the basis, in a further preferable mode, the underground structure 1 is poured by reinforced concrete, the diameter is generally not less than 2.0m, and the diameter is not less than 2m after being buried below the sliding surface 7; the anchor structure 2 can be an anchor rod or an anchor cable structure, and the length is generally not less than 8 m; the construction channels 5 are arranged at intervals of typically 20 m.
The beneficial effects of this embodiment: the anchor structure 2 is arranged in the stable rock-soil body 8 below the sliding surface 7 above the landslide for reinforcing the fixed underground structure 1, and the underground structure 1 can provide long-term durable and stable large pulling force for the slide-resistant pile 3 through the pulling anchor cable 4, so that the stress of the slide-resistant pile 3 can be improved, and the giant landslide can be effectively reinforced. The underground structure 1 is arranged below the sliding surface 7 in a pulling-through mode, serves as a large fixed foundation structure and can provide great anchoring force for the slide-resistant piles 3; the arrangement of the anchor structure 2 can greatly enhance the tensile stability of the underground structure 1; the anti-slide pile 3 is used as a reinforced stress structure of the giant landslide; the tensile anchor cable 4 transmits huge anchoring force to the slide-resistant pile 3, the stress state of the slide-resistant pile 3 is improved, and two ends of the tensile anchor cable 4 are fixedly connected with the underground structure 1 and the slide-resistant pile 3, so that the problems of force relaxation loss and unreliable durability are avoided; the construction channel 5 is used as a construction channel for the underground structure 1, the anchor structure 2 and the anti-sliding key 6; the anti-slide key 6 is constructed by utilizing the existing construction channel 5, can bear part of landslide thrust, and has low investment and good effect. The construction method provided ensures the successful, safe, rapid and environment-friendly implementation of the structure, and is beneficial to popularization.
Example 2
As shown in fig. 2 and 3, the construction method for forming the underground-anchor-pile combined skid-resistant reinforcing structure according to embodiment 1 includes the following steps:
A. carrying out plane positioning on the construction channel 5, excavating the pile well of the construction channel 5 in sections, and arranging retaining walls in sections until the elevation of the bottom of the underground structure 1 is reached;
B. excavating the cave structure 1 well holes to two sides through the construction channel 5, and arranging well hole enclosing structures in sections;
C. constructing an anchor structure 2 in a well hole enclosing structure of the underground structure 1, wherein the exposure length of the anchor structure 2 in the well hole is not less than 1.5 m;
D. positioning the plane of the anti-slide pile 3, directionally constructing a tensile anchor cable 4 drilled hole at the top of the anti-slide pile 3, and penetrating the bottom of the drilled hole through a well hole enclosure structure of the underground structure 1;
E. putting a tension anchor cable 4 with casing protection into a drilled hole of the tension anchor cable 4, wherein the bottom of the tension anchor cable 4 enters the underground structure 1 and is not less than 1.5m, and the top exposure is not less than 2.0 m;
F. binding a reinforcement cage of the underground structure 1, fixedly connecting main reinforcements with exposed parts of the anchor structure 2 and the tension anchor cable 4, fixedly connecting the embedded main reinforcements with the reinforcement cage of the underground structure 1 at positions not less than 2.0m at the bottom of the anti-slide key 6, and pouring concrete of the underground structure 1;
G. binding an anti-sliding key 6 steel reinforcement cage, fixedly connecting the anti-sliding key 6 steel reinforcement cage with the embedded steel reinforcement, and pouring anti-sliding key 6 concrete;
H. filling soil is filled in the construction channel 5 at the top of the anti-sliding key 6 in a layered mode until the top of the landslide body 9 is reached;
I. excavating an anti-slide pile 3-pile well, and arranging pile well protecting walls in sections until the pile bottom elevation is reached;
J. binding an anti-slide pile 3 steel reinforcement cage, embedding a PVC pipe in a position where the tension anchor cable 4 passes through, and enabling the tension anchor cable 4 to pass through the PVC pipe and be exposed above the ground;
K. pouring concrete of the anti-slide pile 3;
l, after the concrete of the anti-slide pile 3 reaches the design strength, tensioning and locking the tension anchor cable 4;
and M, constructing a next section of combined structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A cave-anchor-pile combination antiskid reinforced structure which is characterized by comprising:
the underground structure (1) is embedded in a rock-soil body (8) below the sliding surface (7);
the anti-slide pile (3) is arranged in a slide slope body (9) on the lower side of the underground structure (1) and extends into the rock-soil body (8);
and one end of the tension anchor cable (4) is connected with the underground structure (1), and the other end of the tension anchor cable is connected with the upper part of the slide-resistant pile (3).
2. The underground cave-anchor-pile combined anti-sliding reinforcing structure as claimed in claim 1, wherein: the underground structure (1) is far away from an anchor structure (2) is arranged in a rock-soil body (8) on one side of the slide-resistant pile (3), and the anchor structure (2) is fixedly connected with the underground structure (1).
3. The underground cave-anchor-pile combined anti-sliding reinforcing structure as claimed in claim 1, wherein: and a construction channel (5) is communicated between the underground structure (1) and the slope surface of the slip mass (9).
4. The underground cave-anchor-pile combined anti-sliding reinforcing structure as claimed in claim 3, wherein: and an anti-sliding key (6) is arranged in the construction channel (5), the anti-sliding key (6) is connected with the underground structure (1), and the anti-sliding key (6) penetrates through the sliding surface (7).
5. The underground cave-anchor-pile combined anti-sliding reinforcing structure as claimed in claim 3, wherein: the construction channel (5) is vertically arranged.
6. The underground cave-anchor-pile combined anti-sliding reinforcing structure as claimed in claim 1, wherein: and the tension anchor cable (4) is respectively and fixedly connected with the underground structure (1) and the slide-resistant pile (3).
7. A construction method for forming the underground cave-anchor-pile combined skid-resistant reinforcing structure of any one of claims 1 to 6, which comprises the following steps:
s1, excavating a construction channel (5) until the elevation of the bottom of the underground structure (1);
s2, excavating a cave structure well, carrying out plane positioning on the slide-resistant pile (3), constructing a tension anchor cable drilling hole at the top of the slide-resistant pile (3), enabling the drilling hole to penetrate through the cave structure well, and placing a tension anchor cable (4) in the tension anchor cable drilling hole;
s3, respectively constructing the underground structure (1) and the anti-slide pile (3), and respectively connecting the tension anchor cable (4) with the upper parts of the underground structure (1) and the anti-slide pile (3);
and S4, after the anti-slide pile (3) is constructed, tensioning and locking the tension anchor cable (4).
8. The construction method according to claim 7, wherein: after the underground structure (1) is constructed, anti-sliding keys (6) are constructed in the construction channel (5), so that the anti-sliding keys (6) are connected with the underground structure (1).
9. The construction method according to claim 7 or 8, wherein: step S2 specifically includes:
s21, excavating a cave structure and arranging a cave enclosure structure;
s22, carrying out plane positioning on the slide-resistant pile (3) on the slope surface of the slide body (9), and directionally constructing a tension anchor cable drill hole at the top position of the slide-resistant pile (3) and enabling the drill hole to penetrate through the underground structure well hole;
s23, placing the tension anchor cable (4) in the tension anchor cable drilling hole.
10. The construction method according to claim 9, wherein: and when the underground structure (1) is connected with an anchor structure (2), constructing the anchor structure (2) in the well hole enclosing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188605.3A CN111236279A (en) | 2020-03-17 | 2020-03-17 | Underground cave-anchor-pile combined anti-sliding reinforcing structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010188605.3A CN111236279A (en) | 2020-03-17 | 2020-03-17 | Underground cave-anchor-pile combined anti-sliding reinforcing structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926856A (en) * | 2020-07-01 | 2020-11-13 | 中铁二院重庆勘察设计研究院有限责任公司 | Tunnel entering construction method based on longitudinal anti-skid open cut tunnel structure |
| CN111980038A (en) * | 2020-09-01 | 2020-11-24 | 宁波大学 | Novel structure for preventing and treating landslide and construction method thereof |
-
2020
- 2020-03-17 CN CN202010188605.3A patent/CN111236279A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926856A (en) * | 2020-07-01 | 2020-11-13 | 中铁二院重庆勘察设计研究院有限责任公司 | Tunnel entering construction method based on longitudinal anti-skid open cut tunnel structure |
| CN111980038A (en) * | 2020-09-01 | 2020-11-24 | 宁波大学 | Novel structure for preventing and treating landslide and construction method thereof |
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