CN112761170A - Collapse prevention and control device suitable for side slope danger rock mass - Google Patents
Collapse prevention and control device suitable for side slope danger rock mass Download PDFInfo
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- CN112761170A CN112761170A CN202011601488.5A CN202011601488A CN112761170A CN 112761170 A CN112761170 A CN 112761170A CN 202011601488 A CN202011601488 A CN 202011601488A CN 112761170 A CN112761170 A CN 112761170A
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- anchor
- rock mass
- dangerous rock
- rod
- side slope
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a collapse prevention and treatment device suitable for a side slope dangerous rock mass, which belongs to the technical field of civil engineering, wherein a specially-made anchor rod is adopted, and the synergistic effect of the anchor rod and an anchor cable net is adopted, so that the early prevention and treatment of the dangerous rock mass are realized, and the safety of later construction treatment is ensured; and anchor cables are connected among the anchor rods, are fixedly connected with the edges of the anchor nets, and are tightly attached to the slope dangerous rock mass.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a collapse prevention and control device suitable for a side slope dangerous rock mass.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The dangerous rock mass is mostly located on the side slope of the environment outside the engineering opening line, leaves the original position under the action of gravity, earthquake or other external force, and violently and rapidly moves downwards along the slope in the forms of falling, sliding, bouncing and rolling from the slope, so that casualties and property loss under the dangerous rock mass are caused. China is a country with multiple mountainous regions and is also one of countries with more collapse rockfall distribution. Along with the increasing of large-scale and super-large-scale hydroelectric engineering and road engineering in mountainous areas, the problem of geological disasters is increasingly prominent, and the number of disasters caused by instability of dangerous rock masses is increasing. The collapse causes serious life and property loss every year, so that the multifarities, the distribution universality and the serious harmfulness of the rock mass collapse are known.
The inventor finds that the current prevention and control of the side slope dangerous rock mass generally starts from the aspects of drainage, weight reduction, retaining and the like, and drainage is to prevent and control the collection of surface water and underground water by paying attention to the drainage. The weight reduction means that a certain number of rock-soil bodies are dug at the rear edge of the dangerous rock-soil body of the side slope, so that the side slope is stabilized. The supporting and blocking device is usually a retaining wall, an anchor rod and the like to resist the sliding of the whole dangerous rock mass. The inventor believes that in the traditional anchor rod reinforcement, the anchor rod is easy to shear due to excessive shear force applied to lateral rock-soil bodies; and the anchor rod is easy to be stripped along with the sliding of the rock-soil body. In addition, spalling of fractured rock pieces between bolts cannot be effectively controlled.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the collapse prevention and treatment device suitable for the dangerous rock mass on the side slope.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the technical scheme of the invention provides a collapse prevention device suitable for a side slope dangerous rock mass, which comprises an anchor net, a plurality of anchor rods and a plurality of anchor cables, wherein the anchor rods are connected to the corner parts of the anchor net, the middle parts of the anchor net are used for covering the side slope dangerous rock mass, and the anchor rods penetrate through the dangerous rock mass and are embedded into a side slope bedrock; and anchor cables are connected among the anchor rods, are fixedly connected with the edges of the anchor nets, and are tightly attached to the slope dangerous rock mass.
The technical scheme of the invention has the following beneficial effects:
1) in the invention, the anchor rod is used for reinforcing the dangerous rock mass, the anchor rod is used for reinforcing the connection between the dangerous rock mass and the side slope, the acting force between the dangerous rock mass and the side slope is improved, the anchor net is also used for reinforcing the dangerous rock mass, and in the combined form of the anchor rod and the anchor net, because the anchor rod, the side slope bedrock and the dangerous rock mass have stronger acting force, the anchor rod depending on the anchor net can play a role similar to an extrusion reinforcing arch on the dangerous rock mass, can reinforce the dangerous rock mass, reduce the span effect of the dangerous rock mass, enhance the integrity of the dangerous rock mass, and prevent the dangerous rock mass from breaking and other situations.
2) According to the invention, the spine part of the anchor rod main body can enhance the acting force between the anchor rod main body and the dangerous rock mass and the side slope bedrock, when the anchor rod moves towards the tail end under the action of the external force, the spine part and the dangerous rock mass and the side slope bedrock are in friction or physical collision, and the spine part arranged at the oblique tail end can continuously go deep into the side slope bedrock in the movement towards the tail end, so that the tendency that the anchor rod main body is separated from the side slope bedrock and the dangerous rock mass is further counteracted.
3) According to the invention, a plurality of anchor rods are connected through rod members and anchor cables to form resultant force, so that the lateral shearing force between the slope bedrock and the dangerous rock mass can be resisted; the connecting anchor cables are connected through the connecting anchor cables, the connecting anchor cables can play a role in buffering between the rod member anchor cables and the anchor net, and the anchor rod further prevents impact of impact force of broken stones on the anchor net when the dangerous rock mass is cracked.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is a schematic representation of the operation of the present invention according to one or more embodiments,
figure 2 is a schematic side view of the present invention according to one or more embodiments,
figure 3 is a schematic illustration of a tailored bolt according to one or more embodiments of the invention,
FIG. 4 is a top view of an apparatus according to one or more embodiments of the invention.
In the figure: 1. the anchor rod 2, the spine portion 3, the expansion portion 4, the anchor rope between the poles 5, the connection anchor rope 6, the anchor net 7, the dangerous rock mass 8, the bedrock 9 and the drill hole.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced by the background art, aiming at the defects in the prior art, the invention aims to provide the collapse prevention and treatment device suitable for the dangerous rock mass on the side slope.
Example 1
In a typical embodiment of the present invention, the embodiment discloses a collapse prevention and treatment device suitable for a side slope dangerous rock mass 7, which includes an anchor net 6, a plurality of anchor rods 1 and a plurality of drill holes 9, wherein the anchor rods 1 are connected to corner parts of the anchor net 6, the middle part of the anchor net 6 is used for covering the side slope dangerous rock mass 7, the drill holes 9 penetrate through the dangerous rock mass 7 and extend into a side slope bedrock 8, the number of the drill holes 9 and the number of the anchor rods 1 are the same, and each anchor rod 1 is embedded in the corresponding drill hole 9; anchor cables are connected among the anchor rods 1 and fixedly connected with the edges of the anchor nets 6, and the anchor cables are tightly attached to the slope dangerous rock mass 7.
More specifically, referring to fig. 1, the number of the anchor nets 6 in the present embodiment is 1, the number of the anchor rods 1 is 4, the number of the drill holes 9 is 4, the 4 drill holes 9 are arranged in a rectangular shape, the 4 anchor rods 1 are arranged in a rectangular shape, and each drill hole 9 is inserted into 1 anchor rod 1 in a matching manner.
It will be appreciated that the bore hole 9 in this embodiment is formed by the bedrock 8 and the dangerous rock 7 into which the bolt 1 is inserted.
In a further embodiment, the drill holes 9 are cut in advance.
In this embodiment, the prevention object is a dangerous rock mass 7 on a side slope, the dangerous rock mass 7 can be regarded as a whole rock with an inclination angle, an acting force exists between the dangerous rock mass 7 and the side slope, the dangerous rock mass 7 has a gravity, and when the balance of the forces between the dangerous rock mass 7 and the side slope is broken, the dangerous rock mass 7 can have a danger of separation. In this embodiment, at first use stock 1 to consolidate dangerous rock mass 7, strengthen being connected between dangerous rock mass 7 and the side slope through stock 1, improve the effort between dangerous rock mass 7 and the side slope.
In this embodiment, the dangerous rock mass 7 is also reinforced by the anchor net 6. It can be understood that, among the combination form of stock 1 and anchor net 6, because stock 1 and side slope basement rock 8, the dangerous rock mass 7 between have stronger effort, consequently stock 1 that anchor net 6 relied on can play the effect that similar extrusion was consolidated and is encircleed to dangerous rock mass 7, can also reinforce dangerous rock mass 7, reduces 7 span effects of dangerous rock mass, strengthens the wholeness of dangerous rock mass 7, prevents that dangerous rock mass 7 itself from appearing the condition such as fracture.
Further, stock 1 includes stock 1 main part, and the side of stock 1 main part is equipped with a plurality of spine portions 2, and the tail end of the stock 1 main part of the most advanced equal orientation of a plurality of spine portions 2.
More specifically, referring to fig. 2 and 3, the anchor rod 1 main body in the embodiment is a component made of a high-strength metal composite material, and can bear the large shearing force and the pulling resistance of the slope dangerous rock mass 7. The spine portion 2 of stock 1 main part can strengthen the effort between stock 1 main part and dangerous rock mass 7 and the side slope bed rock 8, and when stock 1 received the effect of external force and moved to the tail end, the friction or physical collision took place between spine portion 2 and dangerous rock mass 7, the side slope bed rock 8, and the spine portion 2 that the slant tail end was arranged can continue to go deep into side slope bed rock 8 in moving to the tail end in addition, further offsets the tendency that stock 1 main part breaks away from side slope bed rock 8 and dangerous rock mass 7.
Furthermore, the spine parts 2 are uniformly distributed on the side surface of the anchor rod 1 main body along the axial direction.
More specifically, as described above, when the main body of the anchor rod 1 in the embodiment moves in the direction of the tail end by receiving an external force, the spine 2 also moves in the axial direction and counteracts the tendency of the main body of the anchor rod 1 to separate from the bedrock 8 and the dangerous rock 7, so that the more spine 2 in the axial direction means that the more tendency of the main body of the anchor rod 1 to separate from the bedrock 8 and the dangerous rock 7 is counteracted.
It will be appreciated that the cross-section of the body of the anchor rod 1 in this embodiment is circular, and in other embodiments the cross-section of the cross-bar body may be polygonal.
It can be understood that the anchor rod 1 body is not only provided with a plurality of spikes 2 in the axial direction, but also provided with a plurality of spikes 2 in the radial direction, which will not be described herein.
Further, the front end of the anchor rod 1 main body is a tip end, the tail end of the anchor rod 1 main body is expanded to form an expanded part 3, the expanded part 3 is in an oblate column shape, and the radius of the expanded part 3 is larger than the maximum radius of the anchor rod 1 main body.
More specifically, the enlarged portion 3 is engaged with the anchor rod 1 to connect the anchor cable.
It will be appreciated that the cable bolt is flexible so that it can be attached to the body of the bolt 1 in a twisted manner or by a connector to the body of the bolt 1.
Further, the anchor rope includes anchor rope 4 between the pole and connects anchor rope 5, and the both ends of member anchor rope are all fixed connection in the tail end of stock 1, connect anchor rope 5 and twine in connecting anchor rope 5 and stock 1. The anchor cables 5 are connected with the anchor net 6.
Referring to fig. 1 and 4, in the embodiment, the anchor cable is divided into two types, which are considered based on two aspects, in the first aspect, the anchor rods 1 in the embodiment are embedded into the dangerous rock mass 7 and the side slope bedrock 8, while the side slope bedrock 8 and the dangerous rock mass 7 have relatively high probability of relative movement, the anchor rods 1 existing alone are easily affected by the lateral shearing force between the side slope bedrock 8 and the dangerous rock mass 7 to fail, and when the tail ends of the 4 anchor rods 1 in the embodiment are connected together by using the rod anchor cables, resultant force is formed between the four anchor rods 1, so that the lateral shearing force between the side slope bedrock 8 and the dangerous rock mass 7 can be resisted; in the second aspect, the anchor net 6 in this embodiment is connected to the connecting anchor cables 5 through the connecting anchor cables 5, and the connecting anchor cables 5 can play a role in buffering between the rod member anchor cables and the anchor net 6, so as to further prevent the impact of the impact force of the broken stone blocks on the anchor net 6 when the dangerous rock mass 7 itself is cracked.
Further, the connecting anchor cables 5 are spirally wound on the rod member anchor cables, m contact points exist between the connecting anchor cables 5 and the rod member anchor cables, n contact points exist between the connecting anchor cables 5 and the anchor net 6, and m is smaller than n. The anchor net 6 is in a grid shape, and the anchor cables are connected to the edge of the edge grid of the anchor net 6.
In this embodiment, referring to fig. 4, in this embodiment, 4 segments of rod-member anchor cables connected in a rectangular shape are shared, the anchor net 6 in this embodiment is composed of warp and weft, the warp and weft of the anchor net 6 are 90 °, the warp of the anchor net 6 and any segment of inter-rod anchor cable 4 are 45 °, and the weft of the anchor net 6 and any segment of inter-rod anchor cable 4 are 45 °.
In this embodiment, taking one edge as an example, there are 5 contact points between the connecting anchor cables 5 and the rod member anchor cables, and 6 contact points between the connecting anchor cables 5 and the anchor net 6.
In this embodiment, the anchor net 6 is arranged in such a direction, and the warp or weft is prevented from being stressed alone when the crushed stone falls down.
The anchor cable is made of multiple strands of high-strength steel strands.
The anchor net 6 is made by binding anchor cables made of a plurality of strands of high-strength steel strands.
Example 2
In a typical embodiment of the present invention, the embodiment discloses a method for preventing and treating collapse of a side slope dangerous rock mass 7, and specifically, the device for preventing and treating collapse of a side slope dangerous rock mass 7 as described in embodiment 1 is used for preventing and treating dangerous rock masses.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The collapse prevention and control device is characterized by comprising an anchor net, a plurality of anchor rods and a plurality of anchor cables, wherein the anchor rods are connected to corner parts of the anchor net, the middle parts of the anchor net are used for covering the side slope dangerous rock mass, and the anchor rods penetrate through the dangerous rock mass and are embedded into the side slope bedrock; and anchor cables are connected among the anchor rods, are fixedly connected with the edges of the anchor nets, and are tightly attached to the slope dangerous rock mass.
2. The device for preventing and treating collapse of side slope dangerous rock mass according to claim 1, wherein the anchor rod comprises an anchor rod main body, the side surface of the anchor rod main body is provided with a plurality of sharp pointed parts, and the tips of the sharp pointed parts face the tail end of the anchor rod main body.
3. The device for preventing and treating collapse of side slope dangerous rock mass according to claim 2, wherein the spine parts are uniformly distributed on the side surface of the anchor rod main body along the axial direction.
4. The device for preventing and treating collapse of side slope dangerous rock mass according to claim 2, wherein the front end of the anchor rod main body is a pointed end, the tail end of the anchor rod main body is expanded to form an expanded part, the expanded part is in an oblate column shape, and the radius of the expanded part is larger than the maximum radius of the anchor rod main body.
5. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 1, wherein said anchor cable comprises an inter-rod anchor cable and a connection anchor cable, both ends of said rod member anchor cable are fixedly connected to the tail end of said anchor rod, and said connection anchor cable is wound around said connection anchor cable and said anchor rod.
6. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 5, wherein said connecting anchor cables are connected with said anchor nets.
7. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 5, wherein said connecting anchor cable is spirally wound around said rod anchor cable, there are m contact points between said connecting anchor cable and said rod anchor cable, and there are n contact points between said connecting anchor cable and said anchor net, where m is smaller than n.
8. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 1, wherein said anchor net is in a grid shape, and said anchor cables are connected to the edge of the edge grid of said anchor net.
9. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 1, wherein said anchor cable is made of a plurality of high strength steel strands.
10. The apparatus for preventing and treating collapse of slope dangerous rock mass according to claim 1, wherein said anchor net is made by binding a plurality of anchor cables made of high-strength steel strands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011601488.5A CN112761170A (en) | 2020-12-29 | 2020-12-29 | Collapse prevention and control device suitable for side slope danger rock mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011601488.5A CN112761170A (en) | 2020-12-29 | 2020-12-29 | Collapse prevention and control device suitable for side slope danger rock mass |
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| CN112761170A true CN112761170A (en) | 2021-05-07 |
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| CN202011601488.5A Pending CN112761170A (en) | 2020-12-29 | 2020-12-29 | Collapse prevention and control device suitable for side slope danger rock mass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585298A (en) * | 2021-08-13 | 2021-11-02 | 辽宁四季环境治理工程有限公司 | Collapse prevention and control device and method suitable for side slope dangerous rock mass |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060233611A1 (en) * | 2005-04-15 | 2006-10-19 | Piao-Chin Li | Method for conserving soil and water by integrating botanical net body and soft framework |
| CN103726500A (en) * | 2014-01-13 | 2014-04-16 | 四川省交通运输厅交通勘察设计研究院 | Crush rock slope anchorage pier type active protective net structure |
| CN205636763U (en) * | 2016-05-25 | 2016-10-12 | 中交一公局第五工程有限公司 | Slope construction supporting device |
| CN206189423U (en) * | 2016-11-16 | 2017-05-24 | 广西桂东高速公路有限公司 | Ecological protection anchor system of rock slope |
| CN108203984A (en) * | 2017-12-30 | 2018-06-26 | 武汉理工大学 | A kind of Dangerous Rock Body bolting with wire mesh method |
| CN210031855U (en) * | 2019-03-11 | 2020-02-07 | 昆明理工大学 | Side slope protection system combining initiative and passivity |
-
2020
- 2020-12-29 CN CN202011601488.5A patent/CN112761170A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060233611A1 (en) * | 2005-04-15 | 2006-10-19 | Piao-Chin Li | Method for conserving soil and water by integrating botanical net body and soft framework |
| CN103726500A (en) * | 2014-01-13 | 2014-04-16 | 四川省交通运输厅交通勘察设计研究院 | Crush rock slope anchorage pier type active protective net structure |
| CN205636763U (en) * | 2016-05-25 | 2016-10-12 | 中交一公局第五工程有限公司 | Slope construction supporting device |
| CN206189423U (en) * | 2016-11-16 | 2017-05-24 | 广西桂东高速公路有限公司 | Ecological protection anchor system of rock slope |
| CN108203984A (en) * | 2017-12-30 | 2018-06-26 | 武汉理工大学 | A kind of Dangerous Rock Body bolting with wire mesh method |
| CN210031855U (en) * | 2019-03-11 | 2020-02-07 | 昆明理工大学 | Side slope protection system combining initiative and passivity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585298A (en) * | 2021-08-13 | 2021-11-02 | 辽宁四季环境治理工程有限公司 | Collapse prevention and control device and method suitable for side slope dangerous rock mass |
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