CN102828760A - Pre-stress spiral rib hollow grouting anchor rope - Google Patents
Pre-stress spiral rib hollow grouting anchor rope Download PDFInfo
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- CN102828760A CN102828760A CN2012103241890A CN201210324189A CN102828760A CN 102828760 A CN102828760 A CN 102828760A CN 2012103241890 A CN2012103241890 A CN 2012103241890A CN 201210324189 A CN201210324189 A CN 201210324189A CN 102828760 A CN102828760 A CN 102828760A
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Abstract
The invention discloses a pre-stress spiral rib hollow grouting anchor rope which comprises an anchor rope body which stretches into a rock-soil drilling hole; the anchor rope body is formed by weaving and twisting a plurality of high-strength spiral rib pres-stress steel wires; a rope tool is fixedly connected with the rear end of the anchor rope body; a grouting core tube penetrates through the anchor rope body and the anchor tool; a support disc is sleeved on the anchor tool; a locking nut is screwed on the anchor tool at the rear end of the support disc; the locking nut props against the rear end face of the support disc; and a slurry stopping plug which aligns with the rock-soil drilling hole is sleeved at the rear end of the anchor rope body. According to the grouting anchor rope, by increasing the grouting pressure, while being filled into the drilling hole so as to realize the overall-length anchoring, slurry spreads into the rock fractures around the drilling hole at the same time, so that the bonding and curing functions to the surrounding rock are achieved, and the deep hole anchoring grouting is realized.
Description
Technical field
The present invention relates to soft-rock tunnel, gob side entry, deep tunnel, big section chamber, work plane is widened the view and special engineering field such as roadway crossing point, is specifically related to prestressed spiral rib hollow grouting cable anchor.
Background technology
The resin anchor of at present domestic main employing Φ 15.24, Φ 17.8 steel strand processing and fabricatings carries out the coal road reinforcing.The resin anchoring anchor cable has to be made simply, and installation rate is fast, carries advantages such as timely, obtains large scale application very soon.But high seam workings subject to dy namic pressure in less stable; For example gob side entry driving and some particular locations such as big Cross-section Cut, broken area, receive roadway influenced by overhead mining that dynamic pressure influences etc.; Its bearing capacity is on the low side, simultaneously, because anchorage length has only 1/3rd of anchor cable length; Belong to the end anchorage anchor cable, limited to the reinforcement effect of broken top coal.Along with its consumption is more and more, the resin anchoring anchor cable also exposes a series of problem gradually, and the problem that wherein has is also very serious.From on-the-spot mode of occupation, the outstanding problem that anchor cable exists: mainly there is following defective in present grouting cable anchor:
1, agitating resin anchoring anchor cable can only adopt sub-thread, and the anchor cable supporting capacity is little, and supporting intensity is low, and the boring utilization rate is low.Because the special processing and making process of anchor cable cable body process useless; 7 steel wires of cable body can not synchronous bearer; Its actual supporting capacity of field measurement has only 220-230KN, is lower than the engineering load of steel strand, even also lower than the Fracture Force (250KN) of the Φ 22mm high strength anchor bar that uses at present.Disconnected anchor cable phenomenon appears in tunnel in the region of high stress, pressure influence often with being hit, has brought very big hidden danger for the supporting reliability.
2, as the support system of agitating resin anchoring, anchor cable cable body diameter is less than normal, does not meet reasonably " three footpaths " matching relationship, and the annular solid thickness that resin anchoring agent solidifies back formation reaches more than the 6mm, and anchored force is had adverse effect.Simultaneously, because the anchor cable diameter is less than normal, the weak effect of agitating resin in installation process forms the anchored force that " double-deck skin " reduces anchor cable because of resin anchoring agent packaging bag plastic sheeting wraps steel strand easily, does not have due support action.
3, same because the anchor cable diameter is less than normal, insert in the boring procedure easily to squeeze resin explosive roll in a side or to pass the actual anchors maintenance and deposit and move and can't anchor in the stabilized zone position its validity of such anchor cable by designing requirement.Reliability is well imagined, correspondingly, adopts this anchor cable will inevitably have serious potential safety hazard as the reinforcing measure.
4, in a single day the anchor cable cable body is soft partially, under the roof-bolter thrust, bends easily during installation, and deviates from, because anchor cable cable body elasticity is big, hurt sb.'s feelings easily, also can failure be installed because of hardening of resin cause sometimes.
Summary of the invention
The purpose of this invention is to provide a kind of prestressed spiral rib hollow grouting cable anchor; Through improving grouting pressure, make slurries when being full of boring, realizing full length fastening, as spreading in the rock fracture around the boring; Country rock is played the adhesive solidification effect, realize deep hole anchor notes.
Technical scheme of the present invention is following:
Prestressed spiral rib hollow grouting cable anchor includes the anchor cable cable body that extend in the ground boring, and the anchor cable cable body is to compile strand by several high strength helical rib compressor wires to form; The rear end of anchor cable cable body is fixedly connected with rigging; Pass slip casting core pipe in anchor cable cable body, the rigging, be set with pallet on the rigging, be combined with locking nut on the rigging of pallet rear end; The locking nut roof pressure is on the rear end face of pallet, and anchor cable cable body rear end is set with the stop grouting plug that is right against ground boring.
Described Steel Wire Surface forms the protruding spiral ribs of the continuous shape of 3-6 bar, and spiral ribs and steel wire basic circle are one.
Described stop grouting plug is Rotary-table.
Hollow grouting cable anchor cable body of the present invention adopts high strength helical rib compressor wire to compile strand and forms.High strength helical rib compressor wire is a kind of novel deforming steel wire; Its principal character is the last plastic strain drawing of semiproduct process after the calendering drawing process is handled; Make Steel Wire Surface form the spiral ribs of the convexity of 3 to 6 continuous shapes; Spiral ribs is an one with basic circle, forms the steel wire in same cross section jointly, that is to say that steel wire how long all equates at its sectional area of any point.
Therefore, no matter be that contour processing method material property, material property all have bright steel wire, indented wire and three strands of irreplaceable good characteristics of wire.Have that good, the lax value of intensity height, plasticity is low, stretching property good, and characteristics such as the bond stress of anchoring agent is strong.
1, the anchor cable cable body is novel hollow structure; Carry slip casting core pipe, adopt reverse grouting mode, not only eliminated the possibility that produces the cavity, cave; Guarantee that the anchoring slurries are full of boring; And saved stack and Grouting Pipe special joint (directly utilizing screw-threaded coupling mechanism) as the Grouting Pipe joint, and also need not reproduce a binding turns Grouting Pipe, stack and shutoff injected hole, construction sequence is greatly simplified;
2, cable body top is agitating resin powder stick end anchor, and screw-threaded coupling is adopted in the lower end, can carry immediately after the installation, and the existing various grouting cable anchor products of this point thing all can't accomplish, is very favourable and necessary and have for the top board rock of self-stable ability difference;
3, adopt the screw-threaded coupling mode, the retaining mechanism reliable operation can not skidded, and can not produce spark, and compliance moist to the down-hole, the trickle environment is to adopt the strand tapered anchorage locking mode incomparable; The installation of anchor cable, firmly beforehand means and resin are identical, have cancelled tension process, not only can realize stirring, the integrated Fast Installation of tensioning but also make anchor cable and anchor pole ability synchronous bearer, form whole support action;
4, cable body and retaining mechanism adopt new structure, under the prerequisite that guarantees the slip casting latus rectum, the cable body diameter is reached minimize, and required installation aperture is little, has realized small-bore, large-tonnage, and the cable body structure itself satisfies the requirement of high-pressure slip-casting, can realize that the anchor notes combine;
5, owing to can carry immediately after installing, so slip casting can be arranged in the rear certain distance of meeting head on the anchor cable of certain limit has once been annotated, and therefore construction is very convenient;
6, screw-threaded coupling mechanism has the aligning function, and the little and uniformity of anchor cable protruded length does not influence the tunnel effective height.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Referring to accompanying drawing, prestressed spiral rib hollow grouting cable anchor includes the anchor cable cable body 1 that extend in the ground boring; Anchor cable cable body 1 is to compile strand by several high strength helical rib compressor wires 7 to form, and steel wire 7 surfaces form the protruding spiral ribs of the continuous shape of 3-6 bar, and spiral ribs and steel wire basic circle are one; The rear end of anchor cable cable body 1 is fixedly connected with rigging 5, passes slip casting core pipe 6 in anchor cable cable body 1, the rigging 5, is set with pallet 3 on the rigging 5; Be combined with locking nut 4 on the rigging 5 of pallet 3 rear ends; Locking nut 4 roof pressures are on the rear end face of pallet 3, and anchor cable cable body 1 rear end is set with the stop grouting plug 2 that is right against ground boring, and stop grouting plug 2 is Rotary-table.
Claims (3)
1. prestressed spiral rib hollow grouting cable anchor includes the anchor cable cable body that extend in the ground boring, it is characterized in that: the anchor cable cable body is to compile strand by several high strength helical rib compressor wires to form; The rear end of anchor cable cable body is fixedly connected with rigging; Pass slip casting core pipe in anchor cable cable body, the rigging, be set with pallet on the rigging, be combined with locking nut on the rigging of pallet rear end; The locking nut roof pressure is on the rear end face of pallet, and anchor cable cable body rear end is set with the stop grouting plug that is right against ground boring.
2. prestressed spiral rib hollow grouting cable anchor according to claim 1 is characterized in that: described Steel Wire Surface forms the protruding spiral ribs of the continuous shape of 3-6 bar, and spiral ribs and steel wire basic circle are one.
3. prestressed spiral rib hollow grouting cable anchor according to claim 1, it is characterized in that: described stop grouting plug is Rotary-table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103241890A CN102828760A (en) | 2012-09-05 | 2012-09-05 | Pre-stress spiral rib hollow grouting anchor rope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103241890A CN102828760A (en) | 2012-09-05 | 2012-09-05 | Pre-stress spiral rib hollow grouting anchor rope |
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| CN102828760A true CN102828760A (en) | 2012-12-19 |
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| CN2012103241890A Pending CN102828760A (en) | 2012-09-05 | 2012-09-05 | Pre-stress spiral rib hollow grouting anchor rope |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016036A (en) * | 2013-01-16 | 2013-04-03 | 山东科技大学 | Deep-shaft surrounding-rock grouting anchor cable and grouting method thereof |
| CN103603684A (en) * | 2013-11-26 | 2014-02-26 | 中国科学院武汉岩土力学研究所 | Large-deformation pre-stressed anchor bolt |
| CN104379871A (en) * | 2012-06-18 | 2015-02-25 | 山特维克知识产权股份有限公司 | Anchor mechanism and cable rock bolt |
| CN109707337A (en) * | 2019-01-07 | 2019-05-03 | 中铁十二局集团有限公司 | Assembled grouting pipe voluntarily slurry stop |
| CN110424995A (en) * | 2019-08-06 | 2019-11-08 | 安徽钢铮机电有限公司 | A kind of hollow grouting device and application method of multisection type slip casting |
| CN110421319A (en) * | 2019-07-27 | 2019-11-08 | 山东焱鑫矿用材料加工有限公司 | A kind of overall length cementation anchor cable production method |
| CN110608062A (en) * | 2019-10-09 | 2019-12-24 | 中国矿业大学 | Multi-section hollow grouting anchor cable and supporting method |
| WO2020037815A1 (en) * | 2018-08-20 | 2020-02-27 | 中国矿业大学 | Single anchor concentrated grouting full-length anchored steel wire tendon and method for supporting same |
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| CN101280686A (en) * | 2007-02-28 | 2008-10-08 | 简恩马股份有限公司 | Improved cable bolt |
| CN201507318U (en) * | 2009-09-15 | 2010-06-16 | 济南澳科矿山工程技术有限公司 | Anchored and grouted anchor cable |
| CN201507317U (en) * | 2009-09-15 | 2010-06-16 | 济南澳科矿山工程技术有限公司 | Anchoring-grouting anchor rope |
| CN202970747U (en) * | 2012-12-21 | 2013-06-05 | 高原 | Hollow bolt-grouting anchor cable for mine |
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2012
- 2012-09-05 CN CN2012103241890A patent/CN102828760A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280686A (en) * | 2007-02-28 | 2008-10-08 | 简恩马股份有限公司 | Improved cable bolt |
| CN201507318U (en) * | 2009-09-15 | 2010-06-16 | 济南澳科矿山工程技术有限公司 | Anchored and grouted anchor cable |
| CN201507317U (en) * | 2009-09-15 | 2010-06-16 | 济南澳科矿山工程技术有限公司 | Anchoring-grouting anchor rope |
| CN202970747U (en) * | 2012-12-21 | 2013-06-05 | 高原 | Hollow bolt-grouting anchor cable for mine |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104379871A (en) * | 2012-06-18 | 2015-02-25 | 山特维克知识产权股份有限公司 | Anchor mechanism and cable rock bolt |
| CN103016036A (en) * | 2013-01-16 | 2013-04-03 | 山东科技大学 | Deep-shaft surrounding-rock grouting anchor cable and grouting method thereof |
| CN103016036B (en) * | 2013-01-16 | 2014-10-15 | 山东科技大学 | Deep-shaft surrounding-rock grouting anchor cable and grouting method thereof |
| CN103603684A (en) * | 2013-11-26 | 2014-02-26 | 中国科学院武汉岩土力学研究所 | Large-deformation pre-stressed anchor bolt |
| CN103603684B (en) * | 2013-11-26 | 2016-07-20 | 中国科学院武汉岩土力学研究所 | A kind of large deformation prestressed anchor |
| WO2020037815A1 (en) * | 2018-08-20 | 2020-02-27 | 中国矿业大学 | Single anchor concentrated grouting full-length anchored steel wire tendon and method for supporting same |
| US11280195B2 (en) | 2018-08-20 | 2022-03-22 | China University Of Mining And Technology | Single-anchor centrally grouted full-length anchored steel wire bundle and supporting method thereof |
| CN109707337A (en) * | 2019-01-07 | 2019-05-03 | 中铁十二局集团有限公司 | Assembled grouting pipe voluntarily slurry stop |
| CN110421319A (en) * | 2019-07-27 | 2019-11-08 | 山东焱鑫矿用材料加工有限公司 | A kind of overall length cementation anchor cable production method |
| CN110424995A (en) * | 2019-08-06 | 2019-11-08 | 安徽钢铮机电有限公司 | A kind of hollow grouting device and application method of multisection type slip casting |
| CN110608062A (en) * | 2019-10-09 | 2019-12-24 | 中国矿业大学 | Multi-section hollow grouting anchor cable and supporting method |
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Application publication date: 20121219 |