CN112360528A - Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability - Google Patents
Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability Download PDFInfo
- Publication number
- CN112360528A CN112360528A CN202011161610.1A CN202011161610A CN112360528A CN 112360528 A CN112360528 A CN 112360528A CN 202011161610 A CN202011161610 A CN 202011161610A CN 112360528 A CN112360528 A CN 112360528A
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- anchoring
- anchor rod
- surrounding rock
- large deformation
- controllable
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- 238000004873 anchoring Methods 0.000 title claims abstract description 55
- 239000011435 rock Substances 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims 2
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a surrounding rock anchoring support structure with controllable anchoring force and large deformation adaptability, and relates to the technical field of geotechnical engineering, wherein the main structure comprises an anchor rod and a prestress assembly; the prestress assembly is arranged at one end of the anchor rod. The prestress assembly can adjust the size of prestress so as to improve the adaptability to the deformation of surrounding rocks; the rubber sleeve is sleeved outside the prestressed spring to ensure that the prestressed spring is not rusted in a long-term working environment and the supporting performance is not changed.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability.
Background
At present, in the field of supporting of side slopes or underground caverns and the like, anchor rods and anchor cables are commonly used supporting types, and the existing supporting types can be divided into non-prestressed and prestressed types basically, and can also be divided into common anchor rods (cables) and telescopic anchor rods (cables). Generally, the anchor rod (cable) applied with prestress adapts to rock deformation mainly through the self expansion amount of the anchor rod (cable) body in the later period, while the existing anchor rod (cable) adapted to rock deformation is difficult to apply prestress due to strong self deformation capability and small rigidity, and the prestress is basically not adjustable after being tensioned, so that when the anchor rod (cable) is supported in an underground cavity or a side slope, if the anchor rod is deformed too much after the prestress is applied in the earlier period, the anchor rod fails in a breaking mode, and if the anchor rod (cable) is not prestressed in the earlier period, the rock deformation cannot be effectively controlled, and particularly for a geotechnical engineering body with a higher limit target in deformation, the anchor rod (cable) also means the anchor failure. Although the existing pressure yielding concept anchor rod (cable) can realize the pressure yielding purpose according to the self deformation of the anchor rod (cable), the pressure yielding is basically realized through the self deformation, and the pressure yielding capability and the anchoring body can not be effectively controlled in the later deformation stage. How to realize that anchoring force is invariable, tension force is adjustable and can realize adapting to the great deformation of rock mass, anchor the rock mass when embodying the theory of letting press, still the difficult problem that the engineering needs to solve urgently at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides a surrounding rock anchoring support structure with controllable anchoring force and large deformation adaptation, which can actively provide anchoring force under the condition of large deformation of surrounding rock and can be provided with different prestressed springs according to different grades of large deformation of the surrounding rock so as to meet the requirement of rock mass anchoring.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a surrounding rock anchoring support structure with controllable anchoring force and large deformation adaptability, which comprises an anchor rod and a prestress assembly, wherein the anchor rod is fixedly connected with the anchor rod; the prestress assembly is arranged at one end of the anchor rod.
Optionally, the anchor rod comprises an anchor rod body and an anchor block; the prestress assembly is arranged at one end of the anchoring rod body, and the anchoring block is arranged at the other end of the anchoring rod body.
Optionally, the prestress assembly comprises a pressure bearing base plate, a fastening device and a prestress spring; the anchor rod is detachably arranged at the end part of the anchor rod, the pressure-bearing backing plate is sleeved on one end of the anchor rod, the fastening device is detachably arranged at the end part of the anchor rod, the prestressed spring is sleeved on the anchor rod, and the prestressed spring is arranged between the pressure-bearing backing plate and the fastening device.
Optionally, a central hole is formed in the middle of the pressure bearing backing plate.
Optionally, a plurality of bolt holes are arranged on the pressure bearing backing plate.
Optionally, an external thread is arranged at one end of the anchor rod, a threaded hole is formed in the middle of the fastening device, and the external thread is matched with the threaded hole.
Optionally, one end of the fastening device is of a planar structure, and a reinforcing rib is arranged at the other end of the fastening device.
Optionally, a rubber sleeve is sleeved outside the pre-stressed spring.
Compared with the prior art, the invention has the following technical effects:
the main structure of the surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability comprises an anchor rod and a prestress assembly; the prestress assembly is arranged at one end of the anchor rod. The prestress assembly can adjust the size of prestress so as to improve the adaptability to the deformation of surrounding rocks; the rubber sleeve is sleeved outside the prestressed spring to ensure that the prestressed spring is not rusted in a long-term working environment and the supporting performance is not changed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is an overall view of the anchoring support structure of the present invention.
Fig. 2 is an oblique view of the anchoring support structure of the present invention.
FIG. 3 is an oblique view of the anchoring force control section of the present invention.
Fig. 4 is an oblique view of the anchoring section of the present invention.
FIG. 5 is an oblique view of a pressure bearing backing plate according to the present invention;
note that: 1-anchoring a rod body; 2-bearing backing plate; 3-fixing the bolt; 4-a gasket; 5-a nut; 6-a fastening device; 7-a pre-stressed spring; 8-an anchoring block; 201-bolt hole; 202-a central hole; no. 701-1 prestressed spring; a prestressed spring No. 702-2; no. 703-3 prestressed spring; no. 704-4 prestressed spring; 705-5, prestressed spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the present embodiment provides a surrounding rock bolting and supporting structure with controllable anchoring force and large deformation adaptability, comprising a rock bolt and a prestress assembly; the prestress assembly is arranged at one end of the anchor rod.
In this embodiment, the anchor rod includes an anchor rod body 1 and an anchor block 8; one end of the anchoring rod body 1 is provided with an external thread, and the anchoring block 8 is welded at the other end of the anchoring rod body 1.
The prestress assembly comprises a pressure bearing base plate 2, a fastening device 6 and a prestress spring 7; the middle part of the pressure-bearing backing plate 2 is provided with a central hole 202, the diameter of the central hole 202 is larger than that of the anchoring rod body 1, and the anchoring rod body 1 penetrates through the pressure-bearing backing plate 2 to enable the pressure-bearing backing plate 2 to be movably sleeved on the anchor rod; the middle part of the fastening device 6 is provided with a threaded hole which penetrates through the fastening device 6; the threaded hole in the middle of the fastening device 6 is matched with the external thread at one end of the anchoring rod body 1, so that the fastening device 6 is detachably arranged at the end part of the anchoring rod body 1; the prestressed spring 7 is sleeved on the anchor rod, and the prestressed spring 7 is arranged between the pressure bearing base plate 2 and the fastening device 6.
In a further embodiment, in order to prevent the pre-stressed spring 7 from rusting in a long-term working environment, a rubber sleeve is sleeved outside the pre-stressed spring 7.
Four bolt holes 201 are arranged on the pressure bearing backing plate 2. Through predetermineeing bolt hole 201 on the country rock, be connected pressure-bearing backing plate 2 with the country rock through fixing bolt 3.
The utility model discloses a torque device, including fastener 6, the fastener 6 one end is planar structure, the fastener 6 other end is provided with the stiffening rib, and the stiffening rib is the cross to provide great moment of torsion.
When the tunnel face passes through about ten times of hole diameter of the anchoring support section or the deformation monitoring convergence of the anchoring support section, the deformation of the part on the surface can not be continuously developed, at the moment, the bearing backing plate 2 can be welded and fixed with the anchoring rod body 1 at the central hole 202, and the prestressed spring 7, the fastening device 6 and the thread section of the anchoring rod body 1 are sawn off together.
The prestressed spring 7 is a group consisting of five springs with different spring constants from No. 1 prestressed spring 701 to No. 5 prestressed spring 705, and is selected singly or superposed to play a role according to the deformation of the surrounding rock judged in advance such as the quality of the surrounding rock, the excavation mode and the like.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability is characterized by comprising an anchor rod and a prestress assembly; the prestress assembly is arranged at one end of the anchor rod.
2. The surrounding rock bolting support structure with controllable anchoring force and large deformation according to claim 1, wherein said anchor rod comprises a bolting rod body and a bolting block; the prestress assembly is arranged at one end of the anchoring rod body, and the anchoring block is arranged at the other end of the anchoring rod body.
3. The surrounding rock bolting supporting structure with controllable anchoring force and large deformation according to claim 1, wherein said prestressing assembly comprises a bearing backing plate, a fastening device and a prestressing spring; the anchor rod is detachably arranged at the end part of the anchor rod, the pressure-bearing backing plate is sleeved on one end of the anchor rod, the fastening device is detachably arranged at the end part of the anchor rod, the prestressed spring is sleeved on the anchor rod, and the prestressed spring is arranged between the pressure-bearing backing plate and the fastening device.
4. The surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability of claim 3 is characterized in that a central hole is formed in the middle of the pressure bearing backing plate.
5. The surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability of claim 3 is characterized in that a plurality of bolt holes are formed in the pressure bearing base plate.
6. The surrounding rock anchoring and supporting structure with controllable anchoring force and adaptive to large deformation according to claim 3, wherein an external thread is arranged at one end of the anchor rod, a threaded hole is formed in the middle of the fastening device, and the external thread is matched with the threaded hole.
7. The surrounding rock bolting supporting structure with controllable anchoring force and adaptive to large deformation according to claim 3, wherein one end of said fastening device is a plane structure, and the other end of said fastening device is provided with a reinforcing rib.
8. The surrounding rock anchoring and supporting structure with controllable anchoring force and large deformation adaptability of claim 3, wherein the prestressed spring is externally sleeved with a rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161610.1A CN112360528B (en) | 2020-10-27 | 2020-10-27 | Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161610.1A CN112360528B (en) | 2020-10-27 | 2020-10-27 | Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360528A true CN112360528A (en) | 2021-02-12 |
| CN112360528B CN112360528B (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011161610.1A Active CN112360528B (en) | 2020-10-27 | 2020-10-27 | Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727317A (en) * | 2015-01-27 | 2015-06-24 | 中国矿业大学 | Composite structure for reducing anchor cable prestress loss |
| CN206592140U (en) * | 2017-03-01 | 2017-10-27 | 山东科技大学 | A kind of recyclable pressure-relieving achor bar |
| CN208858380U (en) * | 2018-09-28 | 2019-05-14 | 西安建筑科技大学 | A kind of scalable energy-absorption anchor rod |
| CN110195608A (en) * | 2019-06-18 | 2019-09-03 | 福州大学 | A kind of large deformation tunnel pressure-relieving achor bar measuring pressure from surrounding rock |
| CN111706374A (en) * | 2020-06-30 | 2020-09-25 | 河海大学 | Anchor head expansion resistance-increasing type drainable multistage yielding anchor rod |
-
2020
- 2020-10-27 CN CN202011161610.1A patent/CN112360528B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727317A (en) * | 2015-01-27 | 2015-06-24 | 中国矿业大学 | Composite structure for reducing anchor cable prestress loss |
| CN206592140U (en) * | 2017-03-01 | 2017-10-27 | 山东科技大学 | A kind of recyclable pressure-relieving achor bar |
| CN208858380U (en) * | 2018-09-28 | 2019-05-14 | 西安建筑科技大学 | A kind of scalable energy-absorption anchor rod |
| CN110195608A (en) * | 2019-06-18 | 2019-09-03 | 福州大学 | A kind of large deformation tunnel pressure-relieving achor bar measuring pressure from surrounding rock |
| CN111706374A (en) * | 2020-06-30 | 2020-09-25 | 河海大学 | Anchor head expansion resistance-increasing type drainable multistage yielding anchor rod |
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| Publication number | Publication date |
|---|---|
| CN112360528B (en) | 2022-11-01 |
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