CN111910660A - Ultrahigh slope supporting structure and construction method thereof - Google Patents
Ultrahigh slope supporting structure and construction method thereof Download PDFInfo
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- CN111910660A CN111910660A CN202010896009.0A CN202010896009A CN111910660A CN 111910660 A CN111910660 A CN 111910660A CN 202010896009 A CN202010896009 A CN 202010896009A CN 111910660 A CN111910660 A CN 111910660A
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- slope
- frame body
- slide
- anchor cable
- prestressed anchor
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
Abstract
The invention relates to a super-high slope supporting structure and a construction method thereof, wherein the supporting structure comprises a slope top slide-resistant pile (2) arranged at the top of a slope body (1), a slope bottom slide-resistant pile (4) arranged at the bottom of the slope body, a frame body arranged along the slope surface and a prestressed anchor cable (9) anchored in a stable soil layer; the frame body comprises cross beams (6) and upright posts (7) which are arranged in a staggered manner, one end of a prestressed anchor cable (9) is arranged at the staggered connection part of the cross beams and the upright posts through an anchorage device, and the other end of the prestressed anchor cable is anchored in a stable soil layer; the top of the slope top slide-resistant pile (2) and the top of the frame body middle upright post (7) are connected into a whole through a top connecting beam (3), and the top of the bottom slide-resistant pile (4) and the bottom of the frame body middle upright post (7) are connected into a whole through a bottom connecting beam (5). Compared with the traditional support type, the invention changes the stress mode of the support structure, so that the support structure is more reasonable, the involved construction process is simple and clear, and the invention has stronger engineering practical value and important social and economic benefits, and is worth of large-scale popularization and application.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering support, in particular to an ultrahigh slope support structure and a construction method thereof.
Background
In recent years, with the continuous increase of the economic strength of China, the country pays more and more attention to the infrastructure construction, and high and steep slopes appear in a large number in the fields of highway engineering, construction engineering and the like, but landslide accidents caused by the landslide accidents appear endlessly, and the slope instability of the loess region in the west is more common, can block roads and block traffic, and even threatens the life and property safety of people, so that the method is a serious geological disaster. This not only concerns the quality of the engineering construction, but also further affects the safety of people's lives and properties, so that sufficient attention must be paid to the problem of side slopes in the engineering construction.
The slope which has good stability, excellent geological conditions and difficult instability can be put into use only by slightly finishing, but the slope which has poor engineering properties, easy damage and potential safety hazard needs to be supported and reinforced. The slope support means that a retaining, reinforcing and protecting measure is taken for the slope to ensure the safety of the slope and the environment thereof. The existing common supporting structure mainly comprises a series retaining wall, a pile plate wall, a frame lattice and a combination type combined with a prestressed anchor cable, a prestressed anchor rod, a prestressed anchor supporting plate and a prestressed anchoring plate.
From the use condition, the wide application of the support types solves a plurality of engineering problems to a great extent, but the complex slope condition still cannot completely meet the requirements, the landslide accidents are frequent every year, and even the natural disaster management in China is important. From the stress angle, the side slope instability is the process that the lateral force of an unstable soil body is too large under the action of gravity and slides to the face of the sky after exceeding the shearing resistance bearing capacity of the soil body, the existing support mode ensures the safety of the side slope by improving the face resistance of the slope body for a long time, and how to break the traditional stress mode is not considered, and the side slope support means is improved. Therefore, the development of the engineering construction of the ultrahigh slope is limited by the existing technical means, and the development of a novel supporting structure form must be emphasized to ensure the safety of the volatile stable ultrahigh slope.
Aiming at the limitation of the existing supporting type, the problem of guaranteeing the safety of the side slope by improving the stress form of the side slope support by adopting the technology or the novel supporting structure is worth researching.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ultrahigh slope supporting structure and a construction method thereof, wherein the structure is more reasonable in stress, can bear larger slope side pressure, has better supporting effect and is more beneficial to slope safety.
In order to solve the above problems, the ultra-high slope supporting structure of the present invention comprises: the system comprises a plurality of slope top slide-resistant piles, a plurality of slope bottom slide-resistant piles, a frame body and a prestressed anchor cable, wherein the slope top slide-resistant piles are arranged at the top of a slope body and vertically extend downwards, the slope bottom slide-resistant piles are arranged at the bottom of the slope body and vertically extend downwards, the frame body is arranged along the slope surface, and the prestressed anchor cable is anchored in a stable soil layer; the frame body comprises cross beams and upright columns which are arranged in a staggered manner, one end of the prestressed anchor cable is arranged at the staggered connection position of the cross beams and the upright columns through an anchorage device, and the other end of the prestressed anchor cable extends towards the interior of the slope and is anchored in a stable soil layer; the top of the slope top slide-resistant piles and the top of the upright post positioned at the top in the frame body are connected into a whole through a top connecting beam, and the top of the bottom slide-resistant piles and the bottom of the upright post positioned at the bottom in the frame body are connected into a whole through a bottom connecting beam.
Preferably, the frame body further comprises a soil blocking panel arranged at a gap where the cross beam and the upright post are staggered.
Preferably, the anchorage device comprises a backing plate, an anchor head and anchor sealing concrete arranged on the outer side of the anchor head.
The application also correspondingly provides a construction method of the ultrahigh slope supporting structure, which comprises the following steps:
after the construction of the slope top slide-resistant pile is completed, constructing a top connecting beam and realizing the connection between the top of the slope top slide-resistant pile and the top of the vertical column in the frame body;
constructing a residual structure and a prestressed anchor cable in the frame body, and constructing a slope bottom slide-resistant pile;
and constructing a bottom connecting beam and realizing the connection between the bottom connecting beam and the tops of the slope-bottom slide-resistant piles and the bottoms of the vertical columns in the frame body.
Compared with the prior art, the invention has the following advantages:
1. in the invention, the slide-resistant pile is arranged on the slope top, so that the slide-resistant pile not only can bear the lateral pressure in the horizontal direction, but also can transmit the stress to the frame body through the pile top slide-resistant pile connecting beam, so that the frame body becomes a stressed rod piece (mainly stressed by an upright post) and further forms a triangular steel frame stress system with the prestressed anchor cable, and the stress is obviously different from the traditional slope body lateral pressure which is completely borne by the frame anchor cable. In the traditional support mode, the lower frame beam and the upright post are bending components under the action of the side pressure of the slope body, but the bending bearing capacity is obviously lower than the compression bearing capacity from the stress performance of the concrete component, so that compared with the traditional support mode, the invention has the advantages of more reasonable stress, larger side pressure of the slope body, better support effect and more contribution to the safety of the side slope.
2. The construction process related by the invention is simple and convenient, the cost is lower, and the advantages in the point 1 are further integrated, so that the supporting structure has stronger engineering practical value and important social and economic benefits, and is worthy of being popularized and applied in a large range.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a perspective view of a supporting structure provided in an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a supporting structure provided in an embodiment of the present invention.
Fig. 3 is an elevation view of a supporting structure provided by an embodiment of the present invention.
FIG. 4 is an enlarged view of the anchoring portion of the pre-stressed anchor cable according to an embodiment of the present invention.
Fig. 5 is a structural diagram of a prestressed anchor cable according to an embodiment of the present invention.
In the figure: 1-slope body, 2-slope top slide-resistant pile, 3-slope top connecting beam, 4-slope bottom slide-resistant pile, 5-slope bottom connecting beam, 6-frame cross beam, 7-frame upright post, 8-soil retaining panel, 9-prestressed anchor cable, 10-steel strand, 11-cement mortar, 12-anchor hole, 13-backing plate, 14-anchor head and 15-anchor sealing concrete.
Detailed Description
Referring to fig. 1 to 5, an embodiment of the present invention provides an ultrahigh slope supporting structure, which mainly includes a plurality of slope top slide piles 2 disposed on the top of a slope body 1 and extending vertically downward, a plurality of slope bottom slide piles 4 disposed on the bottom of the slope body 1 and extending vertically downward, a frame body disposed along the slope surface, and a prestressed anchor cable 9 anchored in a stabilized soil layer.
The frame body comprises cross beams 6 and upright posts 7 which are arranged in a staggered mode, and soil retaining panels 8 arranged at staggered gaps of the cross beams 6 and the upright posts 7. One end of a prestressed anchor cable 9 is arranged at the staggered joint of the cross beam 6 and the upright post 7 through an anchorage device, and the other end extends towards the interior of the slope and is anchored in a stable soil layer; the inclination angle between the prestressed anchor cable 9 and the horizontal plane is 10-30 degrees. The anchorage device comprises a backing plate 13, an anchor head 14 and anchor sealing concrete 15 arranged outside the anchor head 14.
The tops of the multiple slope top slide-resistant piles 2 and the tops of the frame body middle columns 7 are connected into a whole through the top connecting beam 3, and the tops of the multiple bottom slide-resistant piles 4 and the bottoms of the frame body middle columns 7 are connected into a whole through the bottom connecting beam 5.
The depth of the slope top slide-resistant pile 2 embedded into the bearing stratum is not less than 1.5 times of the pile diameter, or the pile end is not less than 1m below the horizontal plane of the slope toe, and the buried depth of the slope bottom slide-resistant pile is not less than 1 m. The distance between the slope top slide-resistant piles 2 is considered to be 2 m-3 m, the vertical columns 7 in the frame body are arranged between two adjacent piles of the slope top slide-resistant piles 2 on the slope surface, and the corresponding prestressed anchor cables 9 are arranged between two adjacent piles of the slope top slide-resistant piles 2 in the slope body 1.
Based on the above contents of the ultra-high slope supporting structure, the following description will be made with respect to the main steps of the construction method.
(1) After the construction of the slope top slide-resistant pile 2 is completed, the construction of the top connecting beam 3 is carried out and the connection between the top connecting beam and the top of the slope top slide-resistant pile 2 and the top of the prestressed anchor cable frame body middle upright post 7 is realized.
(2) And constructing the residual structure in the prestressed anchor cable frame body and constructing the slope bottom slide-resistant pile 4.
(3) And constructing the bottom connecting beam 5 and realizing the connection between the bottom connecting beam and the top of the slope bottom slide-resistant pile 4 and the bottom of the vertical column 7 in the prestressed anchor cable frame body.
Further, the construction method will be described in detail below with reference to an actual construction site.
(1) Construction of slope top slide-resistant pile 2
The method comprises the steps of firstly leveling a field to meet the requirement of a drilling machine for laying a track, then paying off and drilling according to a pile position plane arrangement scheme, and hoisting a processed reinforcement cage into a drill hole to pour concrete.
(2) Construction of the pitched roof connecting beam 3
And after the concrete of the slope top slide-resistant pile reaches the designed strength, connecting the slope top slide-resistant pile and the frame upright column together at the pile top through steel bar binding, pouring concrete to form a slope top connecting beam 3, and extending the steel bars of the frame upright column 7 out of the slope surface to be constructed in the next step.
(3) Construction of frame body residual structure
Carry out domatic finishing to original slope body according to the design slope rate from 3 top-down of sloping top even roof beam, clear up the top layer humus soil, then stretch out the reinforcing bar with frame stand 7 and carry out the ligature along domatic stage by stage, pour the concrete after every grade of crossbeam, stand reinforcement completion, form frame body crossbeam 6, stand 7.
(4) Construction of prestressed anchor cable 9
After the concrete of the cross beam 6 and the upright post 7 reaches the preset strength, drilling a hole at the crossed anchor hole, smearing an anticorrosive material on the prestressed steel strand 10, placing the prestressed steel strand in the hole, injecting cement mortar 11 into the anchoring section in the hole, stretching the prestressed anchor cable after the cement mortar 11 reaches the required strength, and connecting the prestressed anchor cable 9 and the frame body together through a backing plate, an anchor head and anchor sealing concrete.
(5) Step-by-step construction
And repeating the steps until the frame body and the prestressed anchor cable 9 are constructed to the slope bottom.
(6) Construction of slope bottom slide-resistant pile and slope bottom connecting beam
After the frame body upright post 7 is constructed to the slope bottom, drilling holes according to the designed pile position at the slope bottom, hoisting the processed reinforcement cage and placing the reinforcement cage into the drilled holes, further continuously binding the reinforcements, connecting the frame upright post 7, the slope bottom slide-resistant pile 4 and the slope bottom connecting beam 5 together, and finally pouring concrete to complete construction.
The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides an ultrahigh slope supporting construction which characterized in that, this supporting construction includes:
the slope comprises a plurality of slope top slide-resistant piles (2) which are arranged at the top of a slope body (1) and vertically extend downwards, a plurality of slope bottom slide-resistant piles (4) which are arranged at the bottom of the slope body (1) and vertically extend downwards, a frame body which is arranged along the slope surface and a prestressed anchor cable (9) which is anchored in a stable soil layer;
the frame body comprises cross beams (6) and upright posts (7) which are arranged in a staggered manner, one end of the prestressed anchor cable (9) is arranged at the staggered connection position of the cross beams and the upright posts through an anchorage device, and the other end of the prestressed anchor cable extends towards the interior of the slope and is anchored in a stabilized soil layer;
many the top of slope friction pile (2) with lie in the frame body at the top of stand (7) links through top even roof beam (3) and becomes whole, many the top of end friction pile (4) with lie in the frame body the bottom of stand (7) links through bottom even roof beam (5) and becomes whole.
2. The supporting structure of claim 1, wherein said frame body further comprises retaining panels (8) provided at the staggered spaces of said beams (6) and said columns (7).
3. Support structure according to claim 1, characterized in that the anchorage comprises a backing plate (13), an anchor head (14) and sealing concrete (15) provided outside the anchor head (14).
4. A construction method of an ultra-high slope supporting structure according to claim 1, comprising:
after the construction of the slope top slide-resistant pile (2) is finished, constructing a top connecting beam (3) and realizing the connection between the top connecting beam and the top of the slope top slide-resistant pile (2) and the top of a frame body middle upright post (7);
constructing a residual structure and a prestressed anchor cable (9) in the frame body, and constructing a slope bottom slide-resistant pile (4);
and constructing a bottom connecting beam (5) and realizing the connection between the bottom connecting beam and the top of the slope bottom slide-resistant pile (4) and the bottom of the frame body middle upright post (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896009.0A CN111910660A (en) | 2020-09-17 | 2020-09-17 | Ultrahigh slope supporting structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896009.0A CN111910660A (en) | 2020-09-17 | 2020-09-17 | Ultrahigh slope supporting structure and construction method thereof |
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| CN111910660A true CN111910660A (en) | 2020-11-10 |
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| CN202010896009.0A Pending CN111910660A (en) | 2020-09-17 | 2020-09-17 | Ultrahigh slope supporting structure and construction method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005991A (en) * | 2021-03-08 | 2021-06-22 | 广东浩禹建设有限公司 | High-strength anti-seismic water conservancy slope anchor cable structure |
| CN113550335A (en) * | 2021-07-09 | 2021-10-26 | 中电建十一局工程有限公司 | Construction method for high slope concrete slope protection engineering |
| CN113931203A (en) * | 2021-10-21 | 2022-01-14 | 山东省公路桥梁建设集团有限公司 | High-steep-slope pile foundation reinforcing method |
| CN114150679A (en) * | 2021-11-26 | 2022-03-08 | 中煤湖北地质勘察基础工程有限公司 | Anchor pile slope supporting structure and construction method thereof |
| CN114525842A (en) * | 2022-01-14 | 2022-05-24 | 福建省实盛建设工程有限公司 | Construction method of high-low inclined bottom plate of basement |
| CN115094922A (en) * | 2022-06-17 | 2022-09-23 | 中铁建工集团有限公司 | Side slope foundation integrated foundation and construction process thereof |
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| CN102330432A (en) * | 2011-06-16 | 2012-01-25 | 兰州理工大学 | Panel-type framework prestressed anchor rod flexible support structure and construction method thereof |
| CN106498953A (en) * | 2016-11-23 | 2017-03-15 | 中国科学院、水利部成都山地灾害与环境研究所 | Cut slope composite supporting construction and its construction method |
| CN107288138A (en) * | 2016-03-31 | 2017-10-24 | 河南理工大学 | The control structure and construction method of the rock side slope containing weak intercalated layer |
| CN206887967U (en) * | 2017-04-01 | 2018-01-16 | 中国地质大学（武汉） | A kind of stake beam anchor combined type slope retaining structure |
| CN207512752U (en) * | 2017-10-31 | 2018-06-19 | 甘肃中建市政工程勘察设计研究院 | A kind of tall earth fill supporting construction |
| CN209722993U (en) * | 2019-03-14 | 2019-12-03 | 兰州理工大学 | A kind of embankment side slope framework parts La Tuoding anchor slab supporting construction a little |
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| CN102330432A (en) * | 2011-06-16 | 2012-01-25 | 兰州理工大学 | Panel-type framework prestressed anchor rod flexible support structure and construction method thereof |
| CN107288138A (en) * | 2016-03-31 | 2017-10-24 | 河南理工大学 | The control structure and construction method of the rock side slope containing weak intercalated layer |
| CN106498953A (en) * | 2016-11-23 | 2017-03-15 | 中国科学院、水利部成都山地灾害与环境研究所 | Cut slope composite supporting construction and its construction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113005991A (en) * | 2021-03-08 | 2021-06-22 | 广东浩禹建设有限公司 | High-strength anti-seismic water conservancy slope anchor cable structure |
| CN113550335A (en) * | 2021-07-09 | 2021-10-26 | 中电建十一局工程有限公司 | Construction method for high slope concrete slope protection engineering |
| CN113931203A (en) * | 2021-10-21 | 2022-01-14 | 山东省公路桥梁建设集团有限公司 | High-steep-slope pile foundation reinforcing method |
| CN114150679A (en) * | 2021-11-26 | 2022-03-08 | 中煤湖北地质勘察基础工程有限公司 | Anchor pile slope supporting structure and construction method thereof |
| CN114525842A (en) * | 2022-01-14 | 2022-05-24 | 福建省实盛建设工程有限公司 | Construction method of high-low inclined bottom plate of basement |
| CN115094922A (en) * | 2022-06-17 | 2022-09-23 | 中铁建工集团有限公司 | Side slope foundation integrated foundation and construction process thereof |
| CN115094922B (en) * | 2022-06-17 | 2023-03-10 | 中铁建工集团有限公司 | Slope foundation integrated foundation and construction process thereof |
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Application publication date: 20201110 |
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