CN101126321A - Expansion anchor rod - Google Patents
Expansion anchor rod Download PDFInfo
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- CN101126321A CN101126321A CNA2006100698358A CN200610069835A CN101126321A CN 101126321 A CN101126321 A CN 101126321A CN A2006100698358 A CNA2006100698358 A CN A2006100698358A CN 200610069835 A CN200610069835 A CN 200610069835A CN 101126321 A CN101126321 A CN 101126321A
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- expansion
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- expander
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Abstract
The invention relates to the technical field of a support facility for the rock, earth and mining engineering, in particular to an expansion anchor rod. The expansion material of the anchor rod adopts a high-elasticity high molecular material, or a compound intensified material made of the steel wire or fibrous material and the high-elasticity and high molecular material or the thin corrugated metal sheet. The expansion body of the anchor rod has a hollow structure; the hollow part is a pressure cavity for injection, one end of the cavity is sealed and an introduction valve and a tube orifice anchor head are closely arranged at the other end ; an expansive force transfer layer is sleeved around the outer edge of the expansion body of the anchor rod and an anchor layer is sleeved around the outer edge of the expansive force transfer layer to form the expansion anchor rod. The expansion anchor rod additionally has the advantages of the rigid anchor rod on the base of keeping the application effect of the flexible injection bolt. The anchoring force is reliable and is easy to be adjusted, supplement and reclaimed; the creep resistance is strong and the anchoring effect is not affected if the geotechnical or the hole wall has honeycombed crack or collapse of artifices; also, the anchor rod is high in strength, low in cost, wear-resistant and is easy to be processed and manufactured.
Description
One, technical field
The present invention relates to ground and mine engineering supporting facility technical field, especially a kind of expansion anchor rod.
Two, background technology
In mining processes such as ground, tunnel and coal, bolt support is the Surrounding Rock Control Technology that has support concurrently and reinforce two kinds of effects, compares with frame set and uses bolt support technology to have remarkable economic efficiency.
Traditional anchor pole can be divided into full length fastening anchor pole and end anchorage anchor pole.Full length fastening anchor pole material therefor all is rigid materials, and the rock stratum of it and institute's anchoring is filled by all kinds of cementing agents and bonded together, and mainly there is following shortcoming in this class anchor pole: 1, construction and installation complexity, long construction period; 2, can't compensate the kinetic anchor hole variation of rock stratum, especially can not solve the supporting problem of soft rock and roadway with large deformation well; 3, anchor pole is difficult for reclaiming.End anchorage anchor pole (or anchor cable) is to expand by the end of anchor pole or anchor cable, and anchor pole is fastened on the rock stratum, deep, and the anchoring rock stratum mainly is suspended on the hard rock stratum by supporting plate.There is following shortcoming in the end anchorage anchor pole: 1, the anchorage effect power of anchor pole is single, in case tension force inadequately just can slippage, very easily causes anchor rod anchored inefficacy; 2, anchor pole can't reclaim.
China national Department of Intellectual Property disclosed a key name on May 25th, 2005, and to be called " flexible pressurized grouting bolt " application number be the application for a patent for invention of CN200310105525.3; And mandate on November 2nd, 2005, it is the utility model patent of ZL200320107130.2 that a key name is called " flexible pressurized grouting bolt " patent No., has solved the shortcoming that traditional anchor pole exists effectively.This technology adopts high resiliency macromolecular material (as rubber, thermoplastic elastomer (TPE)) as the anchor pole material of main part, anchor bar body is made hollow structure, hollow parts is pressed the chamber for annotating, its end one end sealing, one end close installation injection one way valve, anchor bar body is composited with the reinforcement of high resiliency macromolecular material with steel wire or fibrous material.This anchor pole has solved traditional anchor pole various shortcomings soft in supporting, that exist when loosing geotechnical body, the frictional force, the power of inlaying that rely on the body of rod that the normal pressure of anchor hole is produced provide full length fastening, can compensate anchor hole that the geotechnical body displacement causes in the anchoring process automatically changes and can not cause anchor pole loosening, anchored force is reliable and be easy to adjustment and additional, is easy to reclaim multiplexing.
The flexible anchor body of rod of making of the high resiliency macromolecular material can compensate anchor hole that the geotechnical body displacement causes automatically and changes and can not cause anchor pole loosening though have in the anchoring process, and anchored force is reliable and be easy to adjust and replenish, and is easy to reclaim multiplexing advantage.But, the flexible anchor body of rod is directly inserted in hard rock (soil) the killagh hole, standing the friction back damages easily, in long use, body of rod macromolecular material will produce distortion such as creep, and the anchor rod body load performance reduces, and especially run into when being existed honeycomb space or aperture to cave in by the ground hole wall of anchoring, flexible pressurized grouting bolt can produce anchor bar body hoop local damage, and anchoring was lost efficacy.
In order to solve above shortcoming, on " flexible pressurized grouting bolt " body of rod, carried out limit collar again afterwards to deformation strengthening.The key name that China national Department of Intellectual Property accepts is called " annular extension limit flexible pressurized grouting bolt ", and application number is the application for a patent for invention of CN200610044390.8.This technology is on the basis of " flexible pressurized grouting bolt " body of rod structure, vertically the skin of enhancement layer is peripheral around the fiber of inserting the fixed length stretching structure, steel wire, wire rope or their braid in " flexible pressurized grouting bolt " body of rod, hoop to anchor rod body strengthens, make anchor pole after producing the needed elastic deformation of anchoring technology, distortion to the hoop of anchor rod body produces constraint and humidification, and integral body has been strengthened the intensity of anchor rod body.But, being limited to the restriction of existing " flexible pressurized grouting bolt " material, configuration aspects established condition, the intensity of its anchor rod body and the raising of creep resisting ability are restricted.
Three, summary of the invention
The purpose of this invention is to provide a kind of flexible pressurized grouting bolt that promptly has, can compensate anchor hole that the geotechnical body displacement causes automatically and change and can not cause anchor pole loosening, anchored force is reliable and be easy to adjust and replenish, and is easy to reclaim multiplexing advantage; It is strong to have rigidity anchor pole creep-resistant property again concurrently, the influence that anchoring effect is not subjected to the ground hole wall to exist honeycomb space or aperture to cave in, anchor rod strength height, the expansion anchor rod that abrasion resistance properties is good.
Basic design of the present invention is: expansion anchor rod is to adopt the high resiliency macromolecular material, perhaps adopt steel wire or fibrous material and high resiliency macromolecular material complex intensifying material, perhaps adopt the corrugated thin metal panel material, material as the anchor pole expander, the expander of anchor pole is made hollow cavity, hollow parts is pressed the chamber for annotating, the end sealing of cavity, and other end close installation is annotated and is pressed valve and pore anchor head; At outer rim suit one deck expansion force transfer layer of anchor pole expander, the suit anchor layer constitutes outside the expansion force transfer layer.Annotating and pressing valve is one way valve.With clip or technique for sticking plug is fixed on an end of expander, uses the same method to install to annotate and press valve and pore anchor head, form airtight expander at the other end of expander.
The expansion force transfer layer is the cylinder that is rolled into the hoop fracture by metal sheet roof covering or rubber sheet or sheet plastic or highland barley paper thin plate etc., is perhaps become the cylinder of hoop closure by high strength and high flexibility fibrage, is sleeved on the expander outer rim.
Anchor layer is the mouse cage cylindrical housing that the outer rim suit at the expansion force transfer layer is made of compact arranged metal bar, but the perhaps suit flexible cylindrical housing of hoop that interlocks, link by the steel sheet bar of S tee section or C tee section.One end of cylindrical housing seals with plug, and other end socket also is fixed on the pore anchor head; Fixed form is welding or bonding or mechanical withholding.The metal bar that constitutes the mouse cage cylindrical housing is circular cross-section or square-section or square-section.
Annotate and press valve closely to be connected by screw thread or bonding agent with the pore anchor head, anchor head can be furnished with pallet or nut.Anchoring piece one end of the tubular structure plug of packing into, other end socket also is fixed on the pore anchor head.
" expansion anchor rod " also has the advantage of rigidity anchor pole concurrently on the basis that keeps " flexible pressurized grouting bolt " effect:
1, it is higher to annotate pressure, and anchored force is bigger.Because anchor layer is made of the anchoring piece of bearing anchored force fully, the anchoring piece that bears anchored force directly acts on the country rock soil body, reduced requirement to the expander strength of materials, make expansion anchor rod each several part structure and material range of choice wide in range, the anchor layer of S shape or C shape prismatic shapes anchoring piece formation can be limited the maximum swelling amount of expander simultaneously; The expansion force transfer layer adopts high-intensity metal sheet roof covering or rubber sheet or sheet plastic or highland barley paper coil sheet to make the longitudinal opening cylinder, perhaps high strength and high flexibility fibrage becomes vertical closed cylinder, can guarantee the evenly stressed of expander, can work as again after expander reaches the maximum swelling amount, the continuation of confined expansion body is expanded, and has improved the pressure-bearing and the sealability of expander greatly; The elastomeric material of expander selection tightness excellence or corrugated thin metal plate etc. are made to annotate and are pressed the chamber, gas injection or fluid injection; Expander also can select thicker highly elastic material to make luminal structure, injects expanding materials such as expansive cement, can reach the effect of long-term anchoring.The bulk strength and the sealing of expansion anchor rod are improved, and make expander can bear higher interior notes pressure, and the anchored force of anchor pole also improves greatly.
2, the anchor pole scope of application is more extensive.Owing to adopted independently anchoring element, structure and timber range are wide, and anchored force scope and anchoring environment can be expanded greatly; Because expansion force transfer layer or anchor layer can limit circumferential expansion, therefore expansion anchor rod can be used for the country rock soil body exposed occasion of cracking, hole and anchor pole in a big way, the scope of application of anchor pole is greatly reduced by the influence of country rock soil body type, and the scope of application is more extensive.
3, processing and fabricating is easy, and is cheap.Because expansion anchor rod is made basic building block according to function, basic building block is selected shapes such as more common pipe, plate, rod for use, and material source is extensive, and is cheap, and processing and fabricating is easy.
Four, description of drawings
Fig. 1 expansion anchor rod structural representation;
Fig. 2 circular cross-section anchoring element structural representation;
Fig. 3 square-section anchoring element structural representation;
Fig. 4 S tee section anchoring element structural representation;
Fig. 5 C tee section anchoring element structural representation.
Reference numeral:
1 expander, 2 expansion force transfer layers, 3 anchor layer, 3-1 circular cross-section anchoring piece, 3-2 square-section anchoring piece, 3-3S tee section anchoring piece, 3-4C tee section anchoring piece, 3-5C tee section button plug-in unit, 4 annotate pressure valve, 5 pore anchor heads, 6 pallets, 7 nuts, 8 plugs, 9 clips, 10 plugs.
Five, the specific embodiment
Be described in detail embodiments of the present invention in conjunction with the accompanying drawings:
1, embodiment one: the anchoring piece expansion anchor rod of circular cross-section
Anchor pole is laid with the bit drills system anchor hole of diameter 28mm usually in the colliery, and for ease of the installation of " expansion anchor rod ", the body of rod diameter of anchor pole is slightly less than bit diameter, is defined as 27mm, and rock-bolt length is 2 meters.As depicted in figs. 1 and 2, the outside diameter 15mm of expander 1 for making, the straight barrel type rubber bag tank of thickness 2mm with rubber; The hoop fracture of expansion force transfer layer 2 for rolling, and the cylinder in an overlapping week with the 0.3mm metal sheet; The circular cross-section anchoring piece 3-1 of anchor layer 3 is round bar or the round thread reinforcing bar of diameter 5mm; Annotate and press valve 4 to be the aircraft tyre valve inside; Pore anchor head 5 is the threaded steel pipe of external surface; Pallet 6, nut 7 are identical with the general part in mine at present; Plug 8 and plug 10 are the round steel post, and plug is processed with closure gasket groove on the face of cylinder; Clip 9 is the steel thin-wall pipe.
During assembling, an end of the straight barrel type rubber bag tank expander 1 of at first plug 10 being packed into annotate to be pressed valve 4 other end of packing into, and by clip 9, expander 1 closely is connected with plug 10 and expander 1 with 4 on valve of notes pressure; One end of 12～13 reinforcing bars is welded on the plug 8 along even layout of hoop, subsequently expander 1 is packed in the tubulose expansion force transfer layer 2, annotate and press valve 4 closely to be connected with pore anchor head 5 by screw thread, in the good mouse cage shape anchor layer 3 of the welding of then expander 1 that assembles and expansion force transfer layer 2 being packed into together, the other end of reinforcing bar evenly distributes and is welded on the pore anchor head 5; At last pallet 6 and nut 7 are fitted on the pore anchor head 5.
During use, take off equipped pallet 6 and nut 7,, water under high pressure or gas annotated press rifle to be threaded io on the pore anchor head 5, annotate and be depressed into 5MPa, take off to annotate and press rifle the anchor pole anchor hole of packing into; Load onto pallet then, fastening nut, anchoring installs, simple installation.Because anchor layer 3 and expansion force transfer layer 2 are the circumference open design in this structure, the pressure of annotating needn't as " annular extension limit flexible pressurized grouting bolt " or " flexible pressurized grouting bolt ", need overcome the hoop constraint of the body of rod self, greatly reduce interior notes pressure required under given anchored force.This anchor pole can provide the maximum anchored force of 90～250kN according to the difference of the used steel trade mark of anchoring piece.
2, embodiment two: the anchoring piece expansion anchor rod of square-section
As shown in Figure 3, selecting sectional dimension for use is the rectangle anchoring piece 3-2 of 8 * 5mm, constitutes expansion anchor rod, and other is identical with embodiment one.
Compare with embodiment one, the difference of this structure only is on anchor layer 3, has substituted the doughnut firmware by the rectangle anchoring piece, has increased the contact area of anchor layer 3 with the country rock body greatly, has improved anchored force.This anchor pole can provide the maximum anchored force of 120～340kN according to the difference of the used steel trade mark of anchoring piece.
3, embodiment three: S tee section anchoring piece expansion anchor rod
As shown in Figure 4, the hoop closed cylinder that expansion force transfer layer 2 selects for use high strength and high flexibility fibrage to become is sleeved on the expander; Selecting thickness for use is that the steel plate bar of 1.5mm is made S shape anchoring piece 3-3 but it is interlocked, is linked into the flexible columnar structured anchor layer of hoop one by one, is sleeved on expansion force transfer layer outer rim and constitutes expansion anchor rod, and other is identical with embodiment one.
Compare with embodiment one, the difference of this structure is that anchor layer 3 has substituted the doughnut firmware by S shape anchoring piece, has increased the contact area of anchor layer 3 with the country rock body, has improved anchored force, and anchor layer 3 self possesses hoop maximum elongation limitation capability simultaneously.This anchor pole can provide the maximum anchored force of 140～400kN according to the difference of the used steel trade mark of anchoring piece.
4, embodiment four: the anchoring piece expansion anchor rod of C tee section
As shown in Figure 5, the hoop closed cylinder that expansion force transfer layer 2 selects for use high strength and high flexibility fibrage to become is sleeved on the expander; Selecting thickness for use is the C shape anchoring piece 3-4 of 2mm and C shape that thickness is 1mm button plug-in unit 3-5, with its insert mutually one by one, link, but form the flexible cylinder of hoop, be sleeved on the expansion force transfer layer and constitute expansion anchor rod outward.Other is identical with embodiment one.
Compare with embodiment one, the difference of this structure is that anchor layer 3 has substituted the doughnut firmware by C shape anchoring piece, has increased the contact area of anchor layer 3 with the country rock body, has improved anchored force, and anchor layer 3 self possesses hoop maximum elongation limitation capability simultaneously.This anchor pole can provide the maximum anchored force of 140～400kN according to the difference of the used steel trade mark of anchoring piece.
Claims (4)
1. expansion anchor rod is to adopt the high resiliency macromolecular material, perhaps adopt steel wire or fibrous material and high resiliency macromolecular material complex intensifying material, perhaps adopt the corrugated thin metal panel material, material as the anchor pole expander, the expander of anchor pole is made the hollow cavity body structure, hollow parts is pressed the chamber for annotating, the sealing of cavity one end, other end close installation is annotated and is pressed valve and pore anchor head, it is characterized by, at outer rim suit one deck expansion force transfer layer of anchor pole expander, constitute in expansion force transfer layer outer rim suit anchor layer.
2. expansion anchor rod according to claim 1, it is characterized by described expansion force transfer layer and be the cylinder of making the hoop fracture by metal sheet roof covering or rubber sheet or sheet plastic or highland barley paper thin plate etc., perhaps become the cylinder of hoop closure, be sleeved on the expander outer rim by high strength and high flexibility fibrage.
3. expansion anchor rod according to claim 1, it is characterized by described anchor layer and be the mouse cage cylindrical housing that the outer rim suit at the expansion force transfer layer is made of compact arranged metal bar, but the perhaps suit flexible cylindrical housing of hoop that interlocks, link by the steel sheet bar of S tee section or C tee section, one end of cylindrical housing seals with plug, and other end socket also is fixed on the pore anchor head.
4. according to claim 1 or 3 described expansion anchor rods, the metal bar that it is characterized by described formation cylindrical housing is circular cross-section or square-section or square-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100698358A CN101126321B (en) | 2006-08-18 | 2006-08-18 | Expansion anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100698358A CN101126321B (en) | 2006-08-18 | 2006-08-18 | Expansion anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101126321A true CN101126321A (en) | 2008-02-20 |
| CN101126321B CN101126321B (en) | 2010-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100698358A Expired - Fee Related CN101126321B (en) | 2006-08-18 | 2006-08-18 | Expansion anchor rod |
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| Country | Link |
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| CN (1) | CN101126321B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900594A (en) * | 2010-07-20 | 2010-12-01 | 周泉清 | Liquid level variable precision data monitoring early warning device |
| CN102787597A (en) * | 2012-06-25 | 2012-11-21 | 潘明亮 | Multi-cable recyclable anchor cable head connecting device |
| CN103061783A (en) * | 2013-02-07 | 2013-04-24 | 河南理工大学 | Retractable steel tube concrete support |
| CN103696790A (en) * | 2013-02-19 | 2014-04-02 | 裴春光 | Shear type expansion anchor rod and application thereof |
| CN105200990A (en) * | 2015-09-29 | 2015-12-30 | 赵明 | Expansion tube anchor cable |
| CN106958450A (en) * | 2017-05-17 | 2017-07-18 | 洛阳理工学院 | A kind of steel tendon anchor pole and its construction method for being used to reinforce weak surrounding rock |
| CN107905826A (en) * | 2017-12-11 | 2018-04-13 | 三峡大学 | One kind fills sand expansion anchor rod |
| CN108978734A (en) * | 2018-04-28 | 2018-12-11 | 青岛理工大学 | Indoor simulation test device for stress characteristic of fiber rib anti-floating anchor rod |
| CN109488355A (en) * | 2019-01-25 | 2019-03-19 | 中国矿业大学 | A kind of construction method of flexible roof bolt |
| CN111595388A (en) * | 2020-06-24 | 2020-08-28 | 湘潭大学 | Humiture sensing intelligence stock |
| CN112664251A (en) * | 2020-12-30 | 2021-04-16 | 开滦（集团）有限责任公司 | Hydraulic expansion type grouting anchor rod and anchoring method |
| PL244682B1 (en) * | 2022-11-04 | 2024-02-19 | Lubelska Polt | Breaking anchor |
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| CH652154A5 (en) * | 1981-01-26 | 1985-10-31 | Brugg Ag Kabelwerke | Anchoring element with a device for centring the same and anchorage with such an anchoring element |
| DE3526557A1 (en) * | 1985-07-25 | 1987-02-05 | Bergwerksverband Gmbh | Tubular, lost borehole plug |
| GB2262970B (en) * | 1991-12-19 | 1995-02-15 | Bridon Plc | Flexible roof bolt |
| US5846041A (en) * | 1997-07-10 | 1998-12-08 | The United States Of America As Represented By The United States Department Of Energy | Nonrotating, self-centering anchor assembly for anchoring a bolt in a borehole |
| CN2568815Y (en) * | 2002-05-31 | 2003-08-27 | 刘维杰 | Strengthening slip casting anchor stock |
| KR100471374B1 (en) * | 2002-07-19 | 2005-03-10 | (주) 코리아에스이 | Compressive Bearing Type Ground Anchor |
| CN100404788C (en) * | 2003-11-19 | 2008-07-23 | 山东省岩土与结构工程技术研究中心 | Flexible injection anchor rod |
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- 2006-08-18 CN CN2006100698358A patent/CN101126321B/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900594A (en) * | 2010-07-20 | 2010-12-01 | 周泉清 | Liquid level variable precision data monitoring early warning device |
| CN102787597A (en) * | 2012-06-25 | 2012-11-21 | 潘明亮 | Multi-cable recyclable anchor cable head connecting device |
| CN102787597B (en) * | 2012-06-25 | 2014-11-05 | 潘明亮 | Multi-cable recyclable anchor cable head connecting device |
| CN103061783A (en) * | 2013-02-07 | 2013-04-24 | 河南理工大学 | Retractable steel tube concrete support |
| CN103696790A (en) * | 2013-02-19 | 2014-04-02 | 裴春光 | Shear type expansion anchor rod and application thereof |
| CN105200990A (en) * | 2015-09-29 | 2015-12-30 | 赵明 | Expansion tube anchor cable |
| CN105200990B (en) * | 2015-09-29 | 2017-09-15 | 蚌埠富源电子科技有限责任公司 | A kind of tube-expanding type anchor cable |
| CN106958450B (en) * | 2017-05-17 | 2024-02-06 | 洛阳理工学院 | Steel wire bundle anchor rod for reinforcing weak surrounding rock and construction method thereof |
| CN106958450A (en) * | 2017-05-17 | 2017-07-18 | 洛阳理工学院 | A kind of steel tendon anchor pole and its construction method for being used to reinforce weak surrounding rock |
| CN107905826A (en) * | 2017-12-11 | 2018-04-13 | 三峡大学 | One kind fills sand expansion anchor rod |
| CN107905826B (en) * | 2017-12-11 | 2023-11-21 | 三峡大学 | Sand filling expansion anchor rod |
| CN108978734A (en) * | 2018-04-28 | 2018-12-11 | 青岛理工大学 | Indoor simulation test device for stress characteristic of fiber rib anti-floating anchor rod |
| CN109488355A (en) * | 2019-01-25 | 2019-03-19 | 中国矿业大学 | A kind of construction method of flexible roof bolt |
| CN109488355B (en) * | 2019-01-25 | 2019-09-03 | 中国矿业大学 | A kind of construction method of flexible roof bolt |
| CN111595388A (en) * | 2020-06-24 | 2020-08-28 | 湘潭大学 | Humiture sensing intelligence stock |
| CN112664251A (en) * | 2020-12-30 | 2021-04-16 | 开滦（集团）有限责任公司 | Hydraulic expansion type grouting anchor rod and anchoring method |
| PL244682B1 (en) * | 2022-11-04 | 2024-02-19 | Lubelska Polt | Breaking anchor |
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| CN101126321B (en) | 2010-04-21 |
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Granted publication date: 20100421 Termination date: 20120818 |