CN110424418B - Self-pressurization protection device and method for maintaining stability of expansive soil slope - Google Patents
Self-pressurization protection device and method for maintaining stability of expansive soil slope Download PDFInfo
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- CN110424418B CN110424418B CN201910682797.0A CN201910682797A CN110424418B CN 110424418 B CN110424418 B CN 110424418B CN 201910682797 A CN201910682797 A CN 201910682797A CN 110424418 B CN110424418 B CN 110424418B
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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
- E02D5/74—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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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to the field of slope engineering design, in particular to a self-pressurization protection device for maintaining the stability of an expansive soil slope and a method thereof, the self-pressurization protection device comprises a rainwater storage tank fixed on the slope, a water outlet of the rainwater storage tank is connected with an anchor rod through a water pipeline, the anchor rod is in a hollow strip-shaped tubular shape, a water-stop plate is arranged in the middle of the interior of the anchor rod, the anchor rod is divided into two chambers, namely a first chamber and a second chamber, a hollow anchor rod water pipe is arranged in the first chamber, one end of the hollow anchor rod water pipe is communicated with the water pipeline, the other end of the hollow anchor rod water pipe is fixed on the water-stop plate and is communicated with the second chamber through a heel from the water-stop plate, a plurality of water through holes are arranged on the outer wall of the second chamber, the anchor rod is inserted into the slope, the rainwater storage tank is, the expansive soil absorbs water to expand, and forms annular extrusion stress on the anchor rod, so that the anchoring force of the anchor rod is improved.
Description
Technical Field
The invention relates to the field of slope engineering design, in particular to a self-pressurization protection device and a method for maintaining the stability of an expansive soil slope.
Background
With the development of social economy, a large number of expansive soil side slopes are built by the operation or start construction of a large number of highways, railways and hydraulic engineering in an expansive soil area and the urbanization construction process in the expansive soil area. Evaporation and rainfall cause the wet-dry cycle, and the swelling soil is expanded and contracted repeatedly to make the soil body produce criss-cross crack, and the soil body becomes loose, and intensity reduces, and together with the efflorescence effect, has further destroyed the integrality of soil body, makes the swelling soil side slope tend to unstable, and then leads to the catastrophe. The current engineering protection method for the expansive soil side slope generally adopts a mode of combining slope lattice with soil layer anchor rods, and the existing anchor rods are not strong in anchoring force, so that the side slope is not stable enough.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the self-pressurization protection device for maintaining the stability of the expansive soil slope, so that the anchoring force of the anchor rod is greatly improved, and the slope stability is better maintained.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a maintain stable self-pressurization protector in inflation soil side slope, including fixing the storage water tank of the rainwater on the side slope, the delivery port of storage water tank passes through conduit connection stock, the stock is cavity bar tubulose, be equipped with the water-stop sheet in the middle of the inside of stock, the water-stop sheet separates the stock into two cavities first cavity and second cavity promptly, arrange hollow stock raceway in the first cavity, the one end of hollow stock raceway is with conduit intercommunication, the other end of hollow stock raceway is fixed on the water-stop sheet and is passed heel second cavity intercommunication in the water-stop sheet, set up a plurality of limbers on the outer wall of second cavity, the stock inserts inside the side slope, the storage water tank is located the top of stock.
The outer port face of the second chamber is an inclined pointed face.
The top of the water storage tank is open, and an overflow port is formed in the side wall of the upper portion of the water storage tank.
The anchor rods are arranged at intervals, and hollow anchor rod water pipes in all the anchor rods are communicated with the water pipe.
Has the advantages that: rainwater in the storage water tank flows into the hollow anchor rod water delivery pipe inside the anchor rod from the water delivery pipe, then flows to the inside of the second cavity, and then permeates to the inside of the peripheral expansion soil body from the limbers of the outer wall of the second cavity, and the expansion soil absorbs water to expand, forms hoop extrusion stress to the anchor rod, thereby improves the anchoring force of the anchor rod, and the length of the anchor rod can be reduced compared with the conventional anchor rod, so that the engineering maintenance cost is reduced, and the side slope is maintained stably.
Another object of the present invention is to overcome the above-mentioned drawbacks of the prior art, and to provide a self-pressurization protection method for maintaining the stability of an expansive soil slope, which can reasonably use an anchor rod to maintain the stability of the slope.
The technical scheme adopted by the invention for solving the technical problems is as follows: a self-pressurization protection method for maintaining the stability of an expansive soil slope comprises the following steps:
a. taking a soil sample on site, and determining the expansive force of the soil sample through an indoor experiment;
b. converting the anchoring force of the anchor rod in unit length according to the overlying pressure and the expansion force of the anchor rod and the anchor rod friction coefficient in the soil sample saturation state;
C. placing the anchor rod section where the first chamber is located within a severe atmospheric influence range in the side slope, and placing the anchor rod section where the second chamber is located outside the severe atmospheric influence range in the side slope, wherein the anchor rod section within the severe atmospheric influence depth range is calculated according to a free section;
d. setting different anchor rod lengths to obtain the anchoring force of a single anchor rod;
e. and calculating the number of the anchor rods required by the stability of the slope according to the anchoring force of the single anchor rod.
Has the advantages that: the number of the anchor rods required for stabilizing the slope at a certain position can be calculated according to actual needs, so that the anchor rods are not wasted, and the best stabilizing effect can be achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a structural view of the anchor.
Detailed Description
The invention is further described below in conjunction with fig. 1-2.
A self-pressurization protection device for maintaining the stability of an expansive soil slope comprises a water storage tank 10 fixed on the slope for storing rainwater, wherein a water outlet of the water storage tank 10 is connected with an anchor rod 30 through a water pipeline 20, the anchor rod 30 is in a hollow strip-shaped tubular shape, a water stop plate 40 is arranged in the middle of the inside of the anchor rod 30, the anchor rod 30 is separated into two chambers, namely a first chamber 31 and a second chamber 32, by the water stop plate 40, a hollow anchor rod water pipe 50 is arranged in the first chamber 31, one end of the hollow anchor rod water pipe 50 is communicated with the water pipeline 20, the other end of the hollow anchor rod water pipe 50 is fixed on the water stop plate 40 and is communicated with the second chamber 32 through the heel of the water stop plate 40, a plurality of water through holes are formed in the outer wall of the second chamber 32, the anchor rod 30 is inserted into the slope, the water storage tank 10 is positioned above the anchor rod 30, when the self-pressurization, the section of the anchor rod 30 where the second chamber 32 is located is arranged outside the severe influence range of the atmosphere in the side slope, rainwater in the water storage tank 10 flows into the hollow anchor rod water pipe 50 inside the anchor rod 30 from the water pipe 20, then flows into the second chamber 32, and then permeates into the peripheral expansive soil body from the water through hole in the outer wall of the second chamber 32, the expansive soil absorbs water and expands to form annular extrusion stress on the anchor rod 30, so that the anchoring force of the anchor rod 30 is improved, compared with a conventional anchor rod, the length of the anchor rod 30 can be reduced, the engineering maintenance cost is reduced, the side slope stability is maintained, the construction method is simple and convenient, and the efficiency is high.
Preferably, the outer port surface of the second chamber 32 is an inclined pointed surface to facilitate insertion of the anchor rod 30 into the interior of the slope.
Further, the upper part of the water storage tank 10 is open, and an overflow opening 11 is formed in the side wall of the upper part of the water storage tank 10.
Furthermore, the anchor rods 30 are arranged at intervals, and the hollow anchor rod water pipes 50 in all the anchor rods 30 are communicated with the water pipe 20.
A self-pressurization protection method for maintaining the stability of an expansive soil slope comprises the following steps:
a. taking a soil sample on site, and determining the expansive force of the soil sample through an indoor experiment;
b. converting the anchoring force of the anchor rod 30 in unit length according to the overlying pressure and the expansion force of the anchor rod 30 and the anchor rod friction coefficient in the soil sample saturation state;
C. placing the anchor rod 30 section where the first chamber 31 is located within the severe atmospheric influence range in the side slope, and placing the anchor rod 30 section where the second chamber 32 is located outside the severe atmospheric influence range in the side slope, wherein the anchor rod 30 section within the severe atmospheric influence depth range is calculated according to a free section;
d. setting different lengths of the anchor rods 30 to obtain the anchoring force of a single anchor rod 30;
e. and calculating the number of the anchor rods 30 required by slope stability according to the anchoring force of a single anchor rod 30. The number of the anchor rods 30 required for stabilizing the slope at a certain position can be calculated according to actual requirements, so that the anchor rods 30 are not wasted, and the best stabilizing effect can be achieved.
It should be understood that the above-described specific embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Obvious variations or modifications which are within the spirit of the invention are possible within the scope of the invention.
Claims (5)
1. The utility model provides a maintain stable self-pressurization protector in native slope that expands which characterized in that: storage water tank (10) including fixing the rainwater on the side slope, stock (30) are connected through conduit (20) to the delivery port of storage water tank (10), stock (30) are cavity bar tubulose, be equipped with water-stop sheet (40) in the middle of the inside of stock (30), water-stop sheet (40) separate into two cavities with stock (30) and are first cavity (31) and second cavity (32), arrange hollow stock raceway (50) in first cavity (31), the one end of hollow stock raceway (50) is with conduit (20) intercommunication, the other end of hollow stock raceway (50) is fixed on water-stop sheet (40) and is passed heel second cavity (32) intercommunication in water-stop sheet (40), set up a plurality of limbers on the outer wall of second cavity (32), inside side slope was inserted in stock (30), storage water tank (10) are located the top of stock (30).
2. The self-pressurizing protective device for maintaining the stability of an expansive soil slope as recited in claim 1, wherein: the outer port face of the second chamber (32) is an inclined pointed face.
3. The self-pressurizing protective device for maintaining the stability of an expansive soil slope as recited in claim 2, wherein: the upper part of the water storage tank (10) is open, and an overflow opening (11) is formed in the side wall of the upper part of the water storage tank (10).
4. A self-pressurizing shield apparatus for maintaining expansive soil slope stability as recited in claim 3, wherein: the anchor rods (30) are arranged at intervals, and the hollow anchor rod water pipes (50) in all the anchor rods (30) are communicated with the water pipe (20).
5. A self-pressurization protection method for maintaining the stability of an expansive soil slope comprises the following steps:
a. taking a soil sample on site, and determining the expansive force of the soil sample through an indoor experiment;
b. converting the anchoring force of the anchor rod (30) in unit length according to the overlying pressure and the expansion force of the anchor rod (30) and the anchor rod friction coefficient in the soil sample saturation state;
C. placing the anchor rod (30) section where the first chamber (31) is located within a severe atmospheric influence range in the side slope, and placing the anchor rod (30) section where the second chamber (32) is located outside the severe atmospheric influence range in the side slope, wherein the anchor rod (30) section within the severe atmospheric influence depth range is calculated according to a free section;
d. setting different anchor rod (30) lengths to obtain the anchoring force of a single anchor rod (30);
e. and calculating the number of the anchor rods (30) required by slope stability according to the anchoring force of a single anchor rod (30).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910682797.0A CN110424418B (en) | 2019-07-26 | 2019-07-26 | Self-pressurization protection device and method for maintaining stability of expansive soil slope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910682797.0A CN110424418B (en) | 2019-07-26 | 2019-07-26 | Self-pressurization protection device and method for maintaining stability of expansive soil slope |
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| CN110424418A CN110424418A (en) | 2019-11-08 |
| CN110424418B true CN110424418B (en) | 2021-02-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298777A (en) * | 2008-06-20 | 2008-11-05 | 同济大学 | Method and device for preventing land slide of swelled ground |
| EP2286035A2 (en) * | 2008-04-22 | 2011-02-23 | Anton Kanand | Device and method for flood protection, coastal protection and scour protection |
| CN103410159A (en) * | 2013-08-13 | 2013-11-27 | 南昌工程学院 | Expansive soil cut slope support structure and construction method thereof |
| CN205012332U (en) * | 2015-09-30 | 2016-02-03 | 常州大学怀德学院 | But recovery type fills water stock |
| CN205954638U (en) * | 2016-06-30 | 2017-02-15 | 大连理工大学 | Half semi -rigid flexible supporting construction of deep basal pit lateral wall |
| CN206844107U (en) * | 2017-02-28 | 2018-01-05 | 中交天津港湾工程研究院有限公司 | A kind of string data enlarging anchor rod with water swelling ring |
-
2019
- 2019-07-26 CN CN201910682797.0A patent/CN110424418B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2286035A2 (en) * | 2008-04-22 | 2011-02-23 | Anton Kanand | Device and method for flood protection, coastal protection and scour protection |
| CN101298777A (en) * | 2008-06-20 | 2008-11-05 | 同济大学 | Method and device for preventing land slide of swelled ground |
| CN103410159A (en) * | 2013-08-13 | 2013-11-27 | 南昌工程学院 | Expansive soil cut slope support structure and construction method thereof |
| CN205012332U (en) * | 2015-09-30 | 2016-02-03 | 常州大学怀德学院 | But recovery type fills water stock |
| CN205954638U (en) * | 2016-06-30 | 2017-02-15 | 大连理工大学 | Half semi -rigid flexible supporting construction of deep basal pit lateral wall |
| CN206844107U (en) * | 2017-02-28 | 2018-01-05 | 中交天津港湾工程研究院有限公司 | A kind of string data enlarging anchor rod with water swelling ring |
Non-Patent Citations (1)
| Title |
|---|
| 膨胀土边坡自平衡预应力锚固方法研究;吴顺川等;《第四届深部岩体力学与工程灾容控制学术研讨会论文集》;20090926;478-482 * |
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| CN110424418A (en) | 2019-11-08 |
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Effective date of registration: 20221207 Address after: No.2, Tenglong Road, Wujin economic development zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Guangya Construction Group Co.,Ltd. Address before: 213032 No. 666 Liaohe Road, Xinbei District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU INSTITUTE OF TECHNOLOGY |