CN201953387U - Non-torque prestressed anchor bar - Google Patents
Non-torque prestressed anchor bar Download PDFInfo
- Publication number
- CN201953387U CN201953387U CN2011200805708U CN201120080570U CN201953387U CN 201953387 U CN201953387 U CN 201953387U CN 2011200805708 U CN2011200805708 U CN 2011200805708U CN 201120080570 U CN201120080570 U CN 201120080570U CN 201953387 U CN201953387 U CN 201953387U
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- anchor bar
- torque
- prestressed
- anchor
- nut
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Abstract
The utility model discloses a non-torque prestressed anchor bar. The non-torque prestressed anchor bar comprises an anchor bar body inserted into an anchor bar hole to be fixed with an anchoring agent, wherein a disc-shaped anchor bar tray, a steel gasket and a prestressed nut are sequentially arranged on the anchor bar body; and a prestressed bolt applying a pretightening force to the steel gasket is arranged on the steel nut. Through the non-torque prestressed anchor bar, the difficulty of mounting the resin anchor bar in the prior art and under the present equipment condition can be greatly reduced without arranging a special big-torque mounting machine; the pretightening force of the anchor bar can be greatly increased; the construction quality of the anchor bar is obviously improved; and an anchor bar support system exerts the maximum performance in the aspects of controlling surrounding rock deformation and maintaining the integrity and the stability of roadway surrounding rocks.
Description
Technical field
The utility model relates to a kind of non-moment of torsion prestressed anchor, is particularly useful for mine tunnel engineering resin prestressed anchor and installs.
Background technology
The developing direction of deep tunnel bolt support technology is high strength, high adhesion stress, high pretension (high pretightning force), high reliability.Theoretical research and production practices show, at anchor pole be installed the initial stage, can to resin anchor apply enough prestressing force become bolt support can realize truly active support, can keep the globality of roadway surrounding rock and the key of stability, and become the major criterion that improves bolt support effect, measurement and check bolt support construction quality quality.The requirement and the situation of present high pretightning force anchor pole are:
1) pretension of anchor pole mainly realize by nut is applied by moment of torsion.
2) nut that uses of high-performance anchor pole is torque nut (resin or nylon fill-type nut, peg type nut etc. are arranged), in order to reduce the friction between the nut and pallet when applying moment of torsion, will add friction shim between nut and pallet usually.
3) to the torque demand of nut: disrumpent feelings moment of torsion must surpass and stirs resistance; And be lower than the peak torque of jumbolter output.
4) to the torque nut of roofbolt, requiring moment of torsion is 60～100kN, full anchor mode capping, and the end anchor takes off limit; Help anchor pole to two, requiring nut torque is 40～60kN, stable performance.
But the pretightning force of in fact present prestressed anchor has only 20～30kN, far can not reach the requirement of prestressing force supporting, finally influence supporting quality, cause the impaired early destruction of roadway surrounding rock, not only bring potential safety hazard, and increased reprocessing and maintenance cost of tunnel.
The monomer jumbolter is generally adopted in present domestic anchor pole perforating and installation, and generally between 100～140Nm, jacking force is no more than 10kN to its output torque, is difficult to satisfy improve the anchor pole pretension, realizes the requirement of prestressed anchor supporting and protection structure.The rock bolting jumbo that the U.S., Australia etc. produce is installed jacking force and can be reached 445kN, and the screw-down torque of output can reach 542Nm, thereby the pretightning force that guarantees anchor pole reaches 70% of its yield strength.But it costs an arm and a leg.
Therefore, the development novel anchor rod changes existing resin anchor and can only pass through the high pulling torque spanner, or high-power rock bolting jumbo just can provide higher prestressing force present situation, is the change key that present anchor pole installation pretightening force is little, installation quality is poor, the bolt support effect is bad.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes in the prior art, provide a kind of simple in structure, easy for installation, pretension height, non-moment of torsion prestressed anchor that supporting effect is good be installed.
Non-moment of torsion prestressed anchor of the present utility model, comprise and insert the anchor bar body that fixes with the anchoring agent in the bolthole, be provided with dish type anchor pole pallet, steel plate washer and prestressing nut on the described anchor bar body successively, prestressing nut is provided with along what the nut circumference was symmetrically distributed and applies the pre-stressed bolt of pretightning force and perforation screw correspondingly to steel plate washer; Described pre-stressed bolt is 2～6.
Beneficial effect: owing to adopted technique scheme, can greatly be reduced in the difficulty of installing resin anchor rod under prior art and the appointed condition, need not to be equipped with special-purpose high pulling torque machinery is installed, can increase substantially the pretightning force of anchor pole, thereby significantly improve the anchor bolt construction quality, make the bolt support system control surrouding rock deformation, safeguard the roadway surrounding rock globality and stable aspect given play to maximum efficiency.Its major advantage has:
1) need not special high pulling torque roof bolting machine tool.Solved present China resin anchor installation mechanical performance and can't satisfy the needs of problems of on-the-spot high prestressed anchor construction high pulling torque equipment.
2) the anchor pole initial pretightning force of installing is with that device therefor is installed is irrelevant, and installation process is packed into except that anchor pole the present rig of needs, and high prestressed realization only needs common wrench or pneumatic tools to get final product, installation process simply, easy operating.
3) size of bolt pretension can realize by number, the degree of tightening of adjusting stove bolt on the pretightning force nut;
4) anchor pole has no difference with present general High strength bolt, just nut has had change, changes prestressing nut into from common high-strength nut, and increased by one with nut, pallet, the equicohesive pad of anchor bar body, cancelled the anti-attrition pad, material cost does not almost increase;
5) installation quality of anchor pole significantly improves, even be difficult to realize portion of the group anchor pole of prestressing force effect in the past, also can easily realize, safety has had assurance, and economic benefit also significantly improves;
6) secondary of anchor pole is fastening can tighten prestressing nut earlier, and then tightens pre-stressed bolt, increases pretightning force, simple to operate, effective.
The drawing explanation
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1-bolthole; 2-anchor bar body; 3-anchor pole pallet; 4-steel plate washer; 5-pre-stressed bolt; The 6-prestressing nut; 7-anchoring agent.
The specific embodiment
As shown in Figure 1, the main anchor bar body 2 of non-moment of torsion prestressed anchor of the present utility model, anchor pole pallet 3, steel plate washer 4 and prestressing nut 5, bolt 6 constitute.Anchor bar body 2 is installed in the bolthole 1, the head of anchor bar body 2 is provided with the anchoring agent 7 that is fixed, be provided with dish type anchor pole pallet 3, steel plate washer 4 and prestressing nut 6 on the anchor bar body 2 successively, prestressing nut 6 is provided with to steel plate washer 4 and applies the pre-stressed bolt 5 of pretightning force and perforation screw correspondingly, steel plate washer 4 and anchor bar body, anchor pole pallet and prestressing nut equal strength, pre-stressed bolt 5 is 2～6, is symmetrically distributed along the prestressing nut circumference, and corresponding screw is the perforation screw.
Claims (2)
1. non-moment of torsion prestressed anchor, comprise and insert the anchor bar body (2) that fixes with anchoring agent (7) in the bolthole (1), it is characterized in that: be provided with dish type anchor pole pallet (3), steel plate washer (4) and prestressing nut (6) on the described anchor bar body (2) successively, prestressing nut (6) is provided with along what its circumference was symmetrically distributed and applies the pre-stressed bolt (5) of pretightning force to steel plate washer (4).
2. non-moment of torsion prestressed anchor according to claim 1 is characterized in that: described pre-stressed bolt (5) is 2～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200805708U CN201953387U (en) | 2011-03-24 | 2011-03-24 | Non-torque prestressed anchor bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200805708U CN201953387U (en) | 2011-03-24 | 2011-03-24 | Non-torque prestressed anchor bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201953387U true CN201953387U (en) | 2011-08-31 |
Family
ID=44497504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200805708U Expired - Fee Related CN201953387U (en) | 2011-03-24 | 2011-03-24 | Non-torque prestressed anchor bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201953387U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680151A (en) * | 2012-05-11 | 2012-09-19 | 天地科技股份有限公司 | Anchor rod torque testing device and method |
| CN106813012A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of prestressing force type fastening clip for cable |
| CN112432778A (en) * | 2020-11-20 | 2021-03-02 | 山东建筑大学 | Anchor rod similar model device capable of applying prestress and using method |
-
2011
- 2011-03-24 CN CN2011200805708U patent/CN201953387U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680151A (en) * | 2012-05-11 | 2012-09-19 | 天地科技股份有限公司 | Anchor rod torque testing device and method |
| CN106813012A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of prestressing force type fastening clip for cable |
| CN112432778A (en) * | 2020-11-20 | 2021-03-02 | 山东建筑大学 | Anchor rod similar model device capable of applying prestress and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20160324 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |