CN203879522U - Expansion shell type anchor rod - Google Patents
Expansion shell type anchor rod Download PDFInfo
- Publication number
- CN203879522U CN203879522U CN201420125404.9U CN201420125404U CN203879522U CN 203879522 U CN203879522 U CN 203879522U CN 201420125404 U CN201420125404 U CN 201420125404U CN 203879522 U CN203879522 U CN 203879522U
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- CN
- China
- Prior art keywords
- wedge
- rises
- shell sheet
- expansion shell
- anchor rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to the technical field of geotechnical engineering anchoring and supporting. An expansion shell type anchor rod comprises an anchor rod body, a pull rope, an elastic string, a wedge body and a plurality of expansion shell pieces; the wedge body is in threaded connection to the lower end part of the anchor rod body; wedge slots used for mounting the expansion shell pieces are formed in the wedge body; the number of the wedge slots are matched with that of the expansion shell pieces; each expansion shell piece is arranged inside a corresponding wedge slot in a sliding manner; the elastic string is connected with and fixes the lower end of each expansion shell piece sequentially; the pull rope is sequentially connected with the upper end part of each expansion shell piece; the two end parts of the pull rope are both arranged on the outer side of the upper end part of the anchor rod body. The expansion shell pieces are fixed in the wedge slots of the wedge body through the arrangement of the pull rope and the elastic string, and during a process of sending an expansion shell anchor head to a preset position of an anchor hole, the expansion shell pieces cannot be opened, so that the engineering problem that the expansion shell pieces engage with surrounding rocks halfway can be solved; and after the expansion shell anchor head is sent to the preset position, the pull rope is released and the expansion shell pieces can freely slide along the wedge surface of the wedge body.
Description
Technical field
The utility model relates to geotechnical engineering anchoring support technical field, relates in particular to a kind of expansion type rock bolt.
Background technology
In the digging process of underground construction, except country rock completely can be from steady and need not supporting, all must to its in addition certain supporting make it enter stable state, this measure is called as combined bolting and shotcrete.Combined bolting and shotcrete is by sprayed mortar, anchor pole, steelframe, steel mesh reinforcements etc. carry out appropriately combined support form, in the anchor pole adopting at combined bolting and shotcrete, there is a kind of expansion type rock bolt, the agent structure of its shell anchor head that rises is comprised of wedge and the shell sheet that rises, threaded anchor rod body is screwed into wedge, the shell anchor head that rises is sent to after assigned address, at the bottom of again wedge and the shell sheet that rises being propped up to anchor hole, to stop wedge rotation, twist again anchor rod body, under on anchor rod body top or anchor rod body, special boss promotes, the shell sheet spreading that rises in wedge groove, until play a role with country rock interlock.
By appeal step, can be found out, existing expansion type rock bolt is in the method all adopting when rising by shell sheet spreading at the bottom of wedge and the shell sheet that rises are propped up to anchor hole, but owing to rising by shell sheet except can the wedge surface on wedge sliding, may radially freely throw off in addition.At the shell anchor head that rises, send in anchor hole assigned address process, if there is no other restrictions, on wedge groove, the loose shell sheet that rises is pushed by residual rubble in irregular anchor hole or anchor hole, the shell sheet that rises is easy to halfway and country rock interlock, cause anchor bolt construction in a dilemma, even because of the shell sheet snap-in force that rises, cross the shell anchor head that rises sharply and cannot take out and cause useless hole.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of expansion type rock bolt, this expansion type rock bolt is limited in wedge groove transferring in anchor hole time by stay cord and the elastic threads shell sheet that will rise, and the engineering problem of prevent from rising shell sheet halfway and country rock interlock occurs.
In order to realize above-mentioned object, the utility model has adopted following technical scheme:
An expansion type rock bolt, comprises anchor rod body, stay cord, elastic threads, wedge and the multi-disc shell sheet that rises; Wedge is threaded on the bottom of anchor rod body; Wedge is provided with for the wedge groove of the shell sheet that rises is installed, and the quantity of wedge groove matches with the quantity of the shell sheet that rises, and the every shell sheet that rises is all slidably arranged in corresponding wedge groove; Elastic threads is connected and fixed the lower end of the every shell sheet that rises successively, and stay cord connects the every all outside, the upper end in anchor rod body of the upper end of shell sheet and the both ends of stay cord of rising successively.
As preferably, described anchor rod body inner hollow, stay cord is located in the inside of anchor rod body.The effect of stay cord is that the upper end of the shell sheet that rises is fixed, and stay cord is connected with the shell sheet that rises from the inside of anchor rod body passes can be to the horizontal pulling force of shell sheet that rises, and the shell sheet that makes to rise is fixed in wedge groove; Meanwhile, stay cord is extracted out convenient after being used to complete, and can not be subject to the impact of irregular anchor hole.
As preferably, the lower end of the described shell sheet that rises is provided with lower connecting hole, the rise upper end of shell sheet is provided with connecting hole, elastic threads is passed the lower connecting hole of the every shell sheet that rises successively, stay cord is successively through in the upper connecting hole of the every shell sheet that rises, and by connecting hole, being connected and fixed is the most simple and effective way, especially wait the shell anchor head that rises, is sending to behind precalculated position, unclamp one end of stay cord, the other end that strains at rope of writing can be extracted stay cord out.
As preferably, stay cord is connected and fixed by drag hook and the upper end of the shell sheet that rises.
As preferably, stay cord is connected and fixed by screw and the upper end of the shell sheet that rises.
As preferably, the middle part, lower surface of described wedge is provided with the wedge pinnacle of downward protrusion, during construction, at the shell sheet spreading that will rise, need to and rise wedge at the bottom of shell sheet prop up anchor hole, then rotate anchor rod body, if but it is insecure to have produced lateral displacement all can make the to rise interlock of shell sheet and country rock when rotating anchor rod body, and the generation of lateral displacement can be avoided in the wedge pinnacle that is provided with downward protrusion at the lower surface middle part of wedge, the interlock of guarantee to rise shell sheet and country rock is firm.
The utility model adopts technique scheme, this expansion type rock bolt is fixed on the shell sheet that rises on the wedge groove of wedge by stay cord and elastic threads are set, the shell sheet that rises can not slide along wedge groove, at the shell anchor head that rises, send in the process in anchor hole precalculated position, the shell sheet that rises cannot open, solved the engineering problem of rise shell sheet halfway and country rock interlock, after sending to precalculated position, unclamp stay cord, the shell sheet that rises can be free to slide along the wedge surface on wedge, elastic threads is shunk under elastic force effect simultaneously, and the shell sheet that rises is more prone to open under the effect of elastic threads.Now turn anchor rod body, under the top of anchor rod body or boss extruding, the shell sector-meeting of rising slowly open and with country rock interlock; then, backing plate, nut the stretching anchor rod body of rod are installed, country rock is applied to prestressing force; finally, can, by requirement of engineering, separately fill with protection mortar.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structure sectional view of shell anchor head of rising.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in further detail.
A kind of expansion type rock bolt as shown in Figure 1 and Figure 2, comprises anchor rod body 1, stay cord 2, elastic threads 3 and the shell anchor head that rises, and the shell anchor head that wherein rises consists of wedge 4 and the multi-disc shell sheet 5 that rises.Wedge 4 is threaded on the bottom of anchor rod body 1, anchor rod body 1 one end is screwed in the internal thread of wedge 4, wedge 4 is provided with for the wedge groove of the shell sheet 5 that rises is installed, and the quantity of wedge groove matches with the quantity of the shell sheet 5 that rises, and the every shell sheet 5 that rises is all slidably arranged in corresponding wedge groove.The middle part, lower surface of wedge 4 is provided with the wedge pinnacle 41 of downward protrusion, during construction, at shell sheet 5 spreadings that will rise, wedge 4 and the shell sheet 5 that rises need to be propped up to 6 ends of anchor hole, then rotate anchor rod body 1, if but it is insecure with the interlock of country rock to have produced the lateral displacement shell sheet 5 that all can make to rise when rotating anchor rod body 1, and the generation of lateral displacement can be avoided in the wedge pinnacle 41 that is provided with downward protrusion at the middle part, lower surface of wedge 4, the shell sheet 5 that guarantees to rise is firm with the interlock of country rock.
Elastic threads 3 is connected and fixed the lower end of the every shell sheet 5 that rises successively, stay cord 2 connects all outsides, the upper end in anchor rod body 1 of the upper end of the every shell sheet 5 that rises and the both ends of stay cord 2 successively, concrete method is that the rise lower end of shell sheet 5 is provided with lower connecting hole, the rise upper end of shell sheet 5 is provided with connecting hole, elastic threads 3 is passed the lower connecting hole of the every shell sheet 5 that rises successively, stay cord 2 is successively through in the upper connecting hole of the every shell sheet 5 that rises, by connecting hole, being connected and fixed is the most simple and effective way, especially wait the shell anchor head that rises, sending to behind precalculated position, unclamp one end of stay cord 2, write and strain at rope 2 the other end and can extract stay cord 2 out.When anchor rod body 1 inner hollow, the inside that stay cord 2 is located in anchor rod body 1 is optimum scheme, because the effect of stay cord 2 is that the upper end of the shell sheet 5 that rises is fixed on the one hand, stay cord 2 is connected with the shell sheet 5 that rises from the inside of anchor rod body 1 passes can be to 5 one the horizontal pulling force of shell sheet that rise, and the shell sheet 5 that makes to rise is fixed in wedge groove; On the other hand, stay cord 2 is extracted out convenient after being used to complete, and can not be subject to the impact of irregular anchor hole 6.
Certainly stay cord 2 can be also that upper end by drag hook or screw and the shell sheet 5 that rises is connected and fixed, when being connected by screw fixedly, the stretching resistance of stay cord 2 and shell sheet 5 connecting portions that rise should be less than the stretching resistance of stay cord 2, after rise shell sheet 5 and country rock interlock, can pull apart by force stay cord 2.
At the shell anchor head that rises, send in the process in anchor hole 6 precalculated positions, this expansion type rock bolt is fixed on the shell sheet 5 that rises on the wedge groove of wedge 4 by stay cord 2 and elastic threads 3 are set, the shell sheet 5 that rises can not slide along wedge groove, the shell sheet 5 that rises cannot open, and has solved the engineering problem of rise shell sheet 5 halfway and country rock interlock.When the shell anchor head that rises, send to behind precalculated position, unclamp one end of stay cord 2, write and strain at the other end of rope 2 and extract stay cord 2 out.The shell sheet 5 that rises can be free to slide along the wedge surface on wedge 4, and while elastic threads 3 has under elastic force effect shrinks, and the shell sheet 5 that rises is more prone to open under the effect of elastic threads 3.Now turn anchor rod body 1, under the top of anchor rod body or boss extruding, the shell sheet 5 that rises can slowly open and with country rock interlock; then, backing plate, nut the stretching anchor rod body of rod 1 are installed, country rock is applied to prestressing force; finally, can, by requirement of engineering, separately fill with protection mortar.
Claims (6)
1. an expansion type rock bolt, is characterized in that comprising anchor rod body, stay cord, elastic threads, wedge and the multi-disc shell sheet that rises; Wedge is threaded on the bottom of anchor rod body; Wedge is provided with for the wedge groove of the shell sheet that rises is installed, and the quantity of wedge groove matches with the quantity of the shell sheet that rises, and the every shell sheet that rises is all slidably arranged in corresponding wedge groove; Elastic threads is connected and fixed the lower end of the every shell sheet that rises successively, and stay cord connects the every all outside, the upper end in anchor rod body of the upper end of shell sheet and the both ends of stay cord of rising successively.
2. a kind of expansion type rock bolt according to claim 1, is characterized in that: described anchor rod body inner hollow, stay cord is located in the inside of anchor rod body.
3. a kind of expansion type rock bolt according to claim 2, it is characterized in that: the lower end of the described shell sheet that rises is provided with lower connecting hole, the rise upper end of shell sheet is provided with connecting hole, and elastic threads is successively through the lower connecting hole of the every shell sheet that rises, and stay cord is successively through in the upper connecting hole of the every shell sheet that rises.
4. a kind of expansion type rock bolt according to claim 2, is characterized in that: stay cord is connected and fixed by drag hook and the upper end of the shell sheet that rises.
5. a kind of expansion type rock bolt according to claim 2, is characterized in that: stay cord is connected and fixed by screw and the upper end of the shell sheet that rises.
6. according to a kind of expansion type rock bolt described in any one in claim 1 ~ 5, it is characterized in that: the middle part, lower surface of described wedge is provided with the wedge pinnacle of downward protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125404.9U CN203879522U (en) | 2014-03-19 | 2014-03-19 | Expansion shell type anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125404.9U CN203879522U (en) | 2014-03-19 | 2014-03-19 | Expansion shell type anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203879522U true CN203879522U (en) | 2014-10-15 |
Family
ID=51680031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420125404.9U Expired - Fee Related CN203879522U (en) | 2014-03-19 | 2014-03-19 | Expansion shell type anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203879522U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN110284914A (en) * | 2019-07-17 | 2019-09-27 | 平安煤炭开采工程技术研究院有限责任公司 | Mixer and anchor |
| WO2020206893A1 (en) * | 2019-04-12 | 2020-10-15 | 长江水利委员会长江科学院 | Umbrella-shaped anchor for quick reinforcement of rock mass, and application method |
-
2014
- 2014-03-19 CN CN201420125404.9U patent/CN203879522U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN109339840B (en) * | 2018-11-13 | 2024-03-05 | 重庆大学 | Anti-torsion large-deformation anchor rod |
| WO2020206893A1 (en) * | 2019-04-12 | 2020-10-15 | 长江水利委员会长江科学院 | Umbrella-shaped anchor for quick reinforcement of rock mass, and application method |
| US11293284B2 (en) | 2019-04-12 | 2022-04-05 | Changjiang River Scientific Research Institute | Umbrella-shaped anchor for quick reinforcement of rock mass, and application method |
| CN110284914A (en) * | 2019-07-17 | 2019-09-27 | 平安煤炭开采工程技术研究院有限责任公司 | Mixer and anchor |
| CN110284914B (en) * | 2019-07-17 | 2021-01-26 | 平安煤炭开采工程技术研究院有限责任公司 | Mixer and anchoring device |
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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: 20141015 Termination date: 20160319 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |