CN101725364A - Displacement release type anchor head device - Google Patents
Displacement release type anchor head device Download PDFInfo
- Publication number
- CN101725364A CN101725364A CN200910238040A CN200910238040A CN101725364A CN 101725364 A CN101725364 A CN 101725364A CN 200910238040 A CN200910238040 A CN 200910238040A CN 200910238040 A CN200910238040 A CN 200910238040A CN 101725364 A CN101725364 A CN 101725364A
- Authority
- CN
- China
- Prior art keywords
- displacement
- stress release
- anchor head
- stress
- type anchor
- 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.)
- Pending
Links
Images
Abstract
The invention relates to a displacement release type anchor head device comprising an anchor rod, a loosing ring and a clamp nut. The displacement release type anchor head device is characterized by also comprising a stress release device and a protective device, wherein the stress release device is arranged between the loosing ring and the clamp nut; the protective device is arranged on the periphery of the stress release device; the axial compression strength of the stress release device is lower than that of the anchor rod; and a strain type device is used as the anchor head so that the anchor rod properly internally moves along with a rock mass inside the loosing ring by properly releasing a certain amount of space through the deformation of the anchor head when external force acting on the anchor rod exceeds the self strength of the anchor rod, the anchor rod can still work under the action of ultimate load, and the normal use of a tunnel can be ensured.
Description
Technical field
The present invention relates to the anchor head assembly of the tunnel structure supporting of underground excavation project, the anchor head assembly of the supporting and protection structure of the deep tunnel particularly bigger in the geostatic stress influence, that mining induced stress is bigger.
Background technology
At present, generally adopt traditional anchor device at the anchorage head of roadway support, according to anchor pole type and anchorage style, it is to be 0.15m by the length that exposes at anchor pole; The anchor cable protruded length is the requirement of considering supporting plate, ground tackle and tensioner, and the anchor cable protruded length is generally controlled about 0.3m.The afterbody body of rod for anchor pole carries out the screw thread modifier treatment, and the mode of selecting for use solid-state quenching metastable state to strengthen mutually can not surpass 5000 ℃ during tempering, between 200-3000 ℃, so just can make tailing screw flight and foot piece have identical bearing capacity.The torque nut that generally adopts is that steel disc fill-type, resin fill formula and peg type are arranged at present, the principle of steel disc formula and resin formula is that the end with high nut removes the part screw thread, put into certain thickness steel disc, extrude plurality of teeth with forcing press then, seal steel disc, steel disc needs certain thrust just can eject.When use the down-hole, supporting plate and nut sleeve on the body of rod, are connected body of rod agitating resin powder stick with rig by nut, adapter sleeve.After resin explosive roll curing, start rig to eject steel disc, use the rig fastening nut, realize integrated installation.The peg type nut is divided into sold inside the country formula and export trade formula, and sold inside the country formula is all to hole on body of rod afterbody and nut, passes pin and rivets tightly, and the certain moment of torsion of pin needs just can be cut off, and realizes integrated installation with this; Outer peg type nut one end is installed the pin of certain size and intensity, reaches certain thrust, and pin is ejected.The effect of Supporting plate for anchor has two aspects: the one, apply moment of torsion by nut, and compress supporting plate and provide pretightning force, and make the pretightning force diffusion to anchor pole, enlarge the anchor pole sphere of action; The 2nd, the surrouding rock deformation after load acts on supporting plate, gives anchor rod body by supporting plate with loading transfer, increases the anchor pole working resistance, and then control surrouding rock deformation.Require supporting plate to satisfy following requirement: the one, the bearing capacity of supporting plate should with body of rod interworking mutually, the excessive deformation of supporting plate all can cause the bolt support ability to reduce greatly with destroying, even whole anchor pole lost efficacy; The 2nd, supporting plate should have the certain deformation ability, and is compressible when load is big, allow pressure, unlikely embrittlement, inefficacy; The 3rd, supporting plate should have certain area, helps the diffusion of bolt pretension; Supporting plate should have certain aligning ability, avoids anchor pole to be subjected to unbalance loading and to reduce support capacity as far as possible.At present, anchor pole generally adopts high-strength deformed steel bar and prestress anchorage cable.
But, the problem that exists for existing anchor pole-cable bolting system is, the length of service of coal mine roadway is about 10-30 at present, and the supporting design period of employing is a middle or short term, the great majority that adopt are active supports, or the system that combines of active-passive supporting.In the bigger tunnel of geostatic stress influence, by the community that rock and supporting and protection structure are formed, promptly active support can not stop the diffusion of relaxation zone fully, just slows down the expansion rate of loosening figure, before loosening figure expands to anchor pole-rock mass community inefficacy, can satisfy the requirement of the tunnel length of service.The Design of bolt support method is divided three classes both at home and abroad: engineering analog method, theoretical calculation and Method for Numerical.
For the geological condition of complexity, the tunnel that the geostatic stress influence is bigger, should adopt the mutual checking of different combinations to three kinds of methods, can not decide design scheme according to a kind of method, because tectonic stress field is followed architectonic existence, the changing situation of neotectonic stress field may take place, there are not the geology and the working condition in two tunnels identical, the geological conditions in different locations, same tunnel is also inequality, the basis of direct engineering analog method practicality is that the geological conditions in two tunnels is similar with working condition, can not have bigger difference.Therefore, no matter from geological structure, the total system is stressed and each factor research such as power transmission process, mining influence, anchor pole and Anchor Cable Technique and technology etc., all will run business into particular one, Quan do, could really accomplish accurate like this.Just can accomplish the target of keeping the safety in production, increasing economic efficiency.
Summary of the invention
In the prior art, the tunnel majority tunnels along seat earth, and the roadway support structure is to adopt anchor spray, anchor pole and anchor cable.This structure in use for some time, will in the coal of top, grow various beddings, laterally the crack, vertically, oblique joint and crack, the medium of superficial part are relatively more broken, some positions also tangible absciss layer can occur.
In order to address the above problem, the present invention has adopted strain relief formula anchor head to deal with the situation that anchor pole constantly produces, expands in radial deformation, crack.
A kind of displacement release type anchor head device; comprise anchor pole; relaxation zone; clamp nut; it is characterized in that; also comprise the protective device that is arranged on the stress release device between relaxation zone and the clamp nut and is arranged on the stress release device periphery, it is less than the axial compression strength of anchor pole described stress release device in axial compressive strength.
Further, described stress release device is the displacement stress releasing device.
Further, described displacement stress releasing device is the hollow stress release device.
Further, described hollow stress release device is for being with along bowl-like member, and the crown center position of member has circular port, and the circular hole aperture should be slightly larger than bolt diameter; The member of two bowl-shape band outers is one group during use, two member one positive one relative being buckled together of anti-the rim of a bowl, and just the outer part of member contacts, and is enclosed within an end of anchor pole then.
Further, bowl hollow stress release device material is an intensity toughness plasticity material preferably.
Further, the material of hollow stress release device is a mild steel.
Further, described hollow stress release device is rectangle ducted body or spherical ducted body.
Further, described protective device is that seamless steel pipe is made protection displacement releasing device, and this device can protect stress release device not to be subjected to the influence of radial load in use.
By using the strain-type device can make the external force that acts on the anchor pole as anchorage head, when surpassing the intensity of anchor pole itself, distortion by anchorage head suitably discharges a certain amount of space, anchor pole moves in suitable with common generation of the rock mass in the relaxation zone, like this, anchor pole still can work under the ultimate load effect, and can guarantee the normal use in tunnel.Solved the problem that runs in the prior art.And along with the expansion of relaxation zone, the inner anchor pole-rock mass in tunnel continues to bear load under plastic state and can not produce rock mass damage or anchor pole and damage.
By using the strain-type device to overcome short problem of reparation phase, prolong anchor pole application life as anchorage head.Observe boring by the surrounding rock structure that is arranged in the back vertical direction, can obtain the variation of tunnel between the rock stratum under the supporting and protection structure effect, according to actual survey result at the scene: on the interface of coal seam and rock stratum, produced significant absciss layer phenomenon; The absciss layer value also relatively significantly on the interface of mud stone and sandstone; In mud stone inside, the structures such as bedding, fracture and seam that distributing on the different layers position, the position that has has also produced more significant absciss layer.
Description of drawings
Fig. 1 is the anchor structure schematic diagram after assembling
Fig. 2 is anchor pole schematic diagram in actual applications among the present invention
The specific embodiment
The present invention has improved the anchor head part of anchor pole in the prior art, adopt a kind of novel anchorage head device, this anchorage head device is a kind of stress release device, as shown in Figure 1, stress release device in the present embodiment is that displacement stress releasing device, this displacement stress releasing device are the member 2 of bowl-shape band outer, the crown center position of member has circular port, and the circular hole aperture should be slightly larger than anchor pole 1 diameter.The member of two bowl-shape band outers is one group during use, two member one positive one relative being buckled together of anti-the rim of a bowl, and just the outer part of member contacts, and is enclosed within an end of anchor pole then.The member of bowl-shape band outer adopts mild steel equal strength toughness plasticity material preferably, and the intensity of the anti-axial compression of one group stress release device should be less than the intensity of the anti-axial compression of anchor pole.During use, also be provided with protective device in the outside of the hollow stress release device of rock bolt head, this protective device is a seamless steel pipe system protection displacement releasing device, and this protective device can protect the hollow stress release device not to be subjected to the influence of radial load in use.
During use, need at first anchor pole to be mounted to the use location, its installation steps are specially: (1) at first plays the boring with the adaptive aperture of skyhook in the installation process of anchor pole.(2) in relatively large hole, bore ends punching footpath, the hole in hole that the aperture is bigger and the adaptive aperture of anchor pole is a concentric holes.The protective device of stress release device should be able to being arranged in the hole of this hole with diameter; the degree of depth in this hole is determined according to the hollow stress release device thickness and the quantity of required setting; the quantity of hollow stress release device then needs to decide (service life is long more, and then the quantity of applied stress releasing device is many more) service life according to drive.(3) protective device 5 is arranged in the relatively large hole, aperture.(4) anchor pole is mounted in the boring, and stop grouting plug 3 is set.(5) stress release device of bowl-shape band outer is arranged on the body of rod of anchor pole by the top mesopore by group.(6) according to row row spacing reinforcing bar joist or steel band are installed.(7) put supporting plate well, fastening nut 4 adds pretightning force.In the actual use, because its compressive strength of every group stress release device is less than the compressive strength of anchor pole, be subjected to axial compression above after the compressive strength of stress release device, stress release device can produce distortion prior to anchor pole, showing as bowl-shape stress release device in the present embodiment can be crushed, will axially discharge certain space after the flattening, can make anchor pole in the ever-increasing process of relaxation zone deflection, share the pressure that anchor rod body bears.Between anchor pole and relaxation zone, produce corresponding compatibility of deformation.Make anchor pole can continue to play a role, supporting and rock mass remain a supporting integral body, and acting in conjunction prolongs the application life of bolt support, and the maintenance cycle in tunnel extends like this, for production provides safety assurance, and the purpose of increasing economic efficiency.
The invention has the advantages that: big for the geostatic stress influence, the tunnel of the rock of the anchor shaft anchor cable supporting that rock structure is grown, the active support of ature of coal, adopt the material of at present general various anchor poles, can adopt the strain relief method, the watch box system of active is reached compatible deformation, can reach advanced technology, site operation is feasible, according to the top board of existing support system.The observation data of lateral wall, at taking all factors into consideration of aspects such as different tunnel geostatic stress character, mining influence, geological structure, provide the concrete stress release formula anchor head design scheme in each tunnel, can accomplish to give full play to the effect of anchor pole, prolong the purpose of tunnel repairing efficiency.Reach advanced technology, safety in production, the purpose of increasing economic efficiency.
Should be noted that: bowl-shape band outer stress release device only is one embodiment of the present of invention, the main body of this invention is: the displacement releasing device, this member proves according to our numerical simulation and material test: use " member of bowl-shape band outer " to be preferred device, but be not unique.Should " member of bowl-shape band outer " be called " hollow deformation device " again.No matter what shape this is built into, as, rectangle ducted body member, spherical ducted body member, elastic components etc. all can be applied among the present invention.And every can passing through discharges displacement, and the member that reaches above application target all can be described as the displacement releasing device, and just " hollow deformation device " also all belongs to protection scope of the present invention.
Claims (8)
1. displacement release type anchor head device; comprise anchor pole; loosening figure; clamp nut; it is characterized in that; also comprise the protective device that is arranged on the stress release device between loosening figure and the clamp nut and is arranged on the stress release device periphery, it is less than the axial compression strength of anchor pole described stress release device in axial compressive strength.
2. the displacement release type anchor head device described in claim 1 is characterized in that, described stress release device is the displacement stress releasing device.
3. the displacement release type anchor head device described in claim 2 is characterized in that, described displacement stress releasing device is the hollow stress release device.
4. the displacement release type anchor head device described in claim 3 is characterized in that, described hollow stress release device is for being with along bowl-like member, and the crown center position of member has circular port, and the circular hole aperture should be slightly larger than bolt diameter; The member of two bowl-shape band outers is one group during use, two member one positive one relative being buckled together of anti-the rim of a bowl, and just the outer part of member contacts, and is enclosed within an end of anchor pole then.
5. the displacement release type anchor head device described in claim 3 is characterized in that, bowl hollow stress release device material is an intensity toughness plasticity material preferably.
6. the displacement release type anchor head device described in claim 5 is characterized in that, the material of hollow stress release device is a mild steel.
7. the displacement release type anchor head device described in claim 3 is characterized in that, described hollow stress release device is rectangle ducted body or spherical ducted body.
8. the displacement release type anchor head device described in claim 1 is characterized in that, described protective device is that seamless steel pipe is made protection displacement releasing device, and this device can protect stress release device not to be subjected to the influence of radial load in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910238040A CN101725364A (en) | 2009-11-24 | 2009-11-24 | Displacement release type anchor head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910238040A CN101725364A (en) | 2009-11-24 | 2009-11-24 | Displacement release type anchor head device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101725364A true CN101725364A (en) | 2010-06-09 |
Family
ID=42446846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910238040A Pending CN101725364A (en) | 2009-11-24 | 2009-11-24 | Displacement release type anchor head device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725364A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943014A (en) * | 2010-08-10 | 2011-01-12 | 中国科学院力学研究所 | Displacement release type anchor head device |
| CN102312594A (en) * | 2010-06-29 | 2012-01-11 | 江苏金冠立体停车系统工程有限公司 | Comb dent type vertical lifting intelligent garage |
| CN102536279A (en) * | 2010-12-28 | 2012-07-04 | 孟志强 | Elastic and flexible anchor rod |
| CN103016035A (en) * | 2012-12-27 | 2013-04-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN107084893A (en) * | 2017-06-14 | 2017-08-22 | 西安工业大学 | A kind of jointed rock mass anchor pole dynamic loading experiment device |
| CN108412526A (en) * | 2018-05-14 | 2018-08-17 | 重庆大学 | A kind of adaptive hierarchical early warning anchor pole |
| CN111911188A (en) * | 2020-09-04 | 2020-11-10 | 湖南科技大学 | Installation method of high-pressure tunnel pressure relief device |
| CN112609689A (en) * | 2020-12-16 | 2021-04-06 | 甘肃建投土木工程建设有限公司 | Assembled damping yielding anchor and construction method |
-
2009
- 2009-11-24 CN CN200910238040A patent/CN101725364A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312594A (en) * | 2010-06-29 | 2012-01-11 | 江苏金冠立体停车系统工程有限公司 | Comb dent type vertical lifting intelligent garage |
| CN102312594B (en) * | 2010-06-29 | 2014-01-29 | 江苏金冠立体停车系统工程有限公司 | Comb dent type vertical lifting intelligent garage |
| CN101943014A (en) * | 2010-08-10 | 2011-01-12 | 中国科学院力学研究所 | Displacement release type anchor head device |
| CN102536279A (en) * | 2010-12-28 | 2012-07-04 | 孟志强 | Elastic and flexible anchor rod |
| CN103016035A (en) * | 2012-12-27 | 2013-04-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN103016035B (en) * | 2012-12-27 | 2014-12-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN107084893A (en) * | 2017-06-14 | 2017-08-22 | 西安工业大学 | A kind of jointed rock mass anchor pole dynamic loading experiment device |
| CN107084893B (en) * | 2017-06-14 | 2023-03-10 | 西安工业大学 | Joint rock mass anchor rod dynamic load test device |
| CN108412526A (en) * | 2018-05-14 | 2018-08-17 | 重庆大学 | A kind of adaptive hierarchical early warning anchor pole |
| CN108412526B (en) * | 2018-05-14 | 2023-12-15 | 重庆大学 | Self-adaptive hierarchical early warning anchor rod |
| CN111911188A (en) * | 2020-09-04 | 2020-11-10 | 湖南科技大学 | Installation method of high-pressure tunnel pressure relief device |
| CN112609689A (en) * | 2020-12-16 | 2021-04-06 | 甘肃建投土木工程建设有限公司 | Assembled damping yielding anchor and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725364A (en) | Displacement release type anchor head device | |
| CN102108703B (en) | Adjustable prestressed anchoring device | |
| CN107829767B (en) | Sectional assembly type yielding hollow grouting anchor rod and construction method thereof | |
| CN110410123B (en) | Novel high-strength anchor rod supporting equipment for coal mine | |
| CN2878511Y (en) | Tensile compression combined self-anchored rock anchor rod | |
| CN102536278B (en) | Progressive yielding combined-type extensible anchor rod and construction method thereof | |
| CN108868856B (en) | Energy-absorbing anchoring method of high-impact-resistant large-deformation energy-absorbing anchoring tray assembly | |
| CN101949294A (en) | Prestressed full-length anchorage support method | |
| CN109026070B (en) | Near-field stress regulation and control method for surrounding rock of deep-buried roadway cave | |
| CN102808635B (en) | A kind of swollen shell-type Inner bolt head prestressed anchor and installation and application thereof | |
| CN112177648B (en) | Novel anti-shearing large-deformation energy-absorbing anchor rod | |
| CN205117379U (en) | Let pressure stock from advancing formula large deformation | |
| CN110925001B (en) | Buffer protection device for preventing anchor cable from being ejected due to failure | |
| CN106523006A (en) | Glass fiber anchor rod and construction method | |
| CN103590844A (en) | High pre-stressing force pressure yielding and equalizing coupling anchorage device for soft rock supporting | |
| CN112593988B (en) | Multi-section anchoring energy-consumption yielding anchor rod aiming at rock burst and anchoring method | |
| CN102828761A (en) | Full-thread glass fiber composite hollow grouting anchor rod | |
| CN202936792U (en) | Expansion shell type internal anchor head pre-stressed anchor | |
| CN112796810A (en) | Rock burst prevention multi-section anchoring energy consumption supporting device and supporting method | |
| CN203570332U (en) | High prestress pressure yielding and equalizing coupling anchorage device used for soft rock supporting | |
| CN208380611U (en) | A kind of anchor pole being suitable for different surrounding rock condition | |
| CN208793023U (en) | Anti- HI high impact large deformation energy-absorbing anchoring tray component | |
| CN207297057U (en) | It is a kind of have the function of from into scissors grouted anchor bar | |
| CN107725088B (en) | Rock burst resistance and large-deformation wing type splitting energy-absorbing anchor rod and structure | |
| CN2830644Y (en) | Controllable prestressed super-strength anchor arm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100609 |