CN201301448Y - Clamp-type recoverable anchor rod - Google Patents
Clamp-type recoverable anchor rod Download PDFInfo
- Publication number
- CN201301448Y CN201301448Y CNU2008201922073U CN200820192207U CN201301448Y CN 201301448 Y CN201301448 Y CN 201301448Y CN U2008201922073 U CNU2008201922073 U CN U2008201922073U CN 200820192207 U CN200820192207 U CN 200820192207U CN 201301448 Y CN201301448 Y CN 201301448Y
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- CN
- China
- Prior art keywords
- steel strand
- anchor
- clamps
- carrying ring
- load
- 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 a clamp-type recoverable anchor rod, in particular to a device capable of realizing anchor recovery. Conical ends of two hemi-toroidal clamps are tightly connected with the front end of a cylindrical carrier ring. The rear end of the cylindrical carrier ring is tightly connected with a carrier body. The end of an unbonded steel strand without a protective sleeve penetrates through the carrier body, the cylindrical carrier ring and the clamps. An unbonded steel strand with a protective sleeve is bound outside a VC plastic grouting pipe. The rear end is connected with a positioner. After the cement slurry is solidified, the tensile force of the anchor is locked and anchoring force is provided. When recovering the anchor, a jacking apparatus is used to stretch the steel strand. When the tensile force reaches the failure tensile force of the carrier ring of the clamps, the clamps fail, the clamps and the steel strand are separated and the steel strand can be pulled out and recovered rapidly. The utility model has the advantages that the installation on the construction site is realized, no special device is required, the performance is reliable, the anchor is suitable for narrow recovery space and the steel strand is reusable.
Description
Technical field
The utility model relates to a kind of device of realizing that anchor pole reclaims.
Background technology
Recoverable anchor rod is for avoiding the temporary lining anchor pole to stay serious hidden danger new developing technology for the contiguous follow-up construction in place.At present, recoverable anchor rod mainly contains following type:
(1) mechanical type recoverable anchor rod: its principle be with coupling with anchor bar body and special-shaped prestressed reinforcement equijoin, when reclaiming, apply the power rotation opposite with fastening direction, make after the disengagement of anchor bar body and hookup its taking-up.Because of it need transmit opposite force, the body of rod must adopt directly and have the materials such as reinforcing bar of certain rigidity, can't use in reclaiming the narrow and small base pit engineering in space.
(2) chemical formula recoverable anchor rod: its principle is that electro-heat equipment or demolition set are installed in the bearing end, when reclaiming, uses ignition device, from the adhesive section of the body of rod with its cut-out and extract.This way of recycling complex structure, reliability is low, can't large-scale promotion application.
(3) U type supporting body recoverable anchor rod: it is fixing that its principle is that steel strand pass through U type supporting body revolution, when reclaiming, unclamps an end of steel strand and the stretch-draw other end is extracted steel strand after the revolution of U type supporting body.This way of recycling was not before an end of steel strand pulled out U type supporting body, and recovery power is bigger, and efficient is low, and the steel strand after reclaiming have produced plastic strain and serious distortion can't reuse.
(4) decide threshold locking type recoverable anchor rod: its principle is an end that metal ring is fixed on steel strand by special extrusion equipment extruding, make it to bear axis force of anchor, during recovery, draw at another end line of steel strand, after surpassing the extrusion friction power of metal ring and steel strand, metal ring and steel strand are thrown off, thereby steel strand are extracted.This anchor pole needs special extrusion equipment, is unfavorable at a construction direct processing and fabricating.
Summary of the invention
The purpose of this utility model is at above-mentioned present situation, aims to provide a kind of can the installation at the construction field (site), does not need Special Equipment, dependable performance, be suitable for narrow and small recovery space, the steel strand after the recovery do not produce bigger plastic strain, the fixture type recoverable anchor rod that can reuse.
The implementation of the utility model purpose is; the fixture type recoverable anchor rod; the awl end of two semicircular ring anchor clamps intermediate plates closely is connected with cylindrical load-carrying ring front end; cylindrical load-carrying ring rear end closely is connected with supporting body; supporting body, cylindrical load-carrying ring, anchor clamps intermediate plate are passed in the end of removing protective sleeve of no binding type steel strand; have the no binding type steel strand of protective sleeve to tie up VC plastics Grouting Pipe outward, the rear end is connected with locator.
When using the utility model, use the rig pore-forming earlier, put into the utility model again, cement paste is injected from the anchor pole end by PVC plastics Grouting Pipe.After treating that cement paste curing reaches designing requirement intensity, can be supporting and protection structure anchored force is provided at the supporting and protection structure end to the locking of anchor pole tension force.
After the anchor pole function of use is finished, need to remove when reclaiming, with thousand nearly top stretch-draw steel strand.Reach the inefficacy tension force of anchor clamps load-carrying ring when tension force after, anchor clamps lost efficacy, and after this steel strand tension force is very little, and anchor clamps separate with steel strand, can fast steel strand be extracted recovery with equipment such as manpower, hoist engine, capstan winches.
The beneficial effects of the utility model are, can install at the construction field (site), do not need Special Equipment, and dependable performance is suitable for narrow and small recovery space, and steel strand can reuse.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2, the 3rd, the structure of load-carrying ring is cutd open, lateral view
Fig. 4,5, the 6th, clamping piece structure cut open, side, vertical view
Fig. 7 is the supporting body structural representation
Fig. 8 is a supporting body structure sectional view
Fig. 9 is the locator structure schematic diagram
The specific embodiment
With reference to Fig. 1; the awl end of two semicircular ring anchor clamps intermediate plates 2 closely is connected with cylindrical load-carrying ring 1 front end; cylindrical load-carrying ring 1 rear end closely is connected with supporting body 3, and supporting body 3, cylindrical load-carrying ring 1 are passed in the end of removing protective sleeve of no binding type steel strand 4, are clamped by anchor clamps intermediate plate 2.Have the no binding type steel strand 4 of protective sleeve to tie up VC plastics Grouting Pipe 6 outward, the rear end is connected with locator 7.
With reference to Fig. 2,3, cylindrical load-carrying ring 1 has conical emptying aperture.With reference to Fig. 4,5,6, anchor clamps intermediate plate 2 has the coning angle that matches with conical emptying aperture.Coning angle and conical emptying aperture closely cooperate, and when anchor clamps intermediate plate 2 is clamped no binding type steel strand 4, and during the stretch-draw steel strand, load-carrying ring provides confined pressure power for the anchor clamps intermediate plate.By the physics self-lock mechanism, intermediate plate is opened tighter and tighter.Thereby make the utility model dependable performance, easy for installation.
With reference to Fig. 2,3, load-carrying ring 1 outer wall has twice otch 9, and otch 8 is arranged one at the bottom, is used to guarantee that the load-carrying ring failure surface always occurs in incision.The degree of depth of otch has determined the effective thickness of load-carrying ring, has also just determined the size of anchor clamps inefficacy tension force.During recovery, external tension passes on the intermediate plate by steel strand, and then passes on the load-carrying ring of anchor clamps, and forms the hoop tensile stress at load-carrying ring.Along with the increase gradually of steel strand tension force, load-carrying ring hoop tensile stress also increases gradually.When the hoop tensile stress reached the incision YIELD STRENGTH, load-carrying ring produced bigger plastic strain at the incision material yield.Intermediate plate moves with steel strand, impels load-carrying ring further to be out of shape.When the plastic strain of load-carrying ring incision material develops into to a certain degree, the otch fracture, load-carrying ring lost efficacy, and the steel strand tension force of this moment is anchor clamps inefficacy tension force.Intermediate plate does not unclamp because of having confined pressure power and steel strand, steel strand promptly very small tension receiving coil extract fast, thereby realize the demand that the utility model high rate reclaims.
With reference to Fig. 4,5,6, Fig. 7,8, Fig. 9, anchor clamps intermediate plate 2, supporting body 3, locator have the hole of the no binding type steel strand 4 of folder.
The utility model drilling construction process is consistent with conventional anchor pole work progress, promptly earlier uses the rig pore-forming, puts into again, by PVC plastics Grouting Pipe 6 cement paste is injected from the utility model end, forms anchor bolt grouting body 5.After treating that cement paste curing reaches designing requirement intensity, can be supporting and protection structure anchored force is provided at the supporting and protection structure end to the locking of anchor pole tension force.
After the utility model function of use is finished, need to remove when reclaiming, with thousand nearly top stretch-draw steel strand.Reach the inefficacy tension force of anchor clamps load-carrying ring when tension force after, anchor clamps lost efficacy, and after this steel strand tension force is very little, can fast steel strand be extracted with equipment such as manpower, hoist engine, capstan winches.
During duty, guiding principle twisted wire tension force T of the present utility model requires to be not more than jig Design and allows maximum tension value Fd, i.e. T≤Fd, and in the formula: T is the steel strand actual tension, Fd is that jig Design allows maximum tension.
During recovery, when steel strand tension force T certain between minimum failure force Ff.min of anchor clamps and maximum failure power Ff.max was worth, anchor clamps lost efficacy, and the anchor clamps intermediate plate separates with no binding type steel strand.
Minimum failure force Ff.min and maximum failure power Ff.max determine by anchor clamps load-carrying ring notch depth and steel self character.
For guaranteeing that the utility model provides reliable and stable anchored force to supporting and protection structure in working order, require maximum tension value Fd＜k1 * Ff.min, in the formula: k1 is a safety factor, is 1.3～1.5.
For guaranteeing that the utility model anchor clamps when reclaiming at first lost efficacy rather than steel strand are broken, require k2 * Ff.max＜S, in the formula: S allows tension value for the steel strand material, and k2 is a safety factor, is 1.3～1.5.
Claims (3)
1, fixture type recoverable anchor rod; the awl end that it is characterized in that two semicircular ring anchor clamps intermediate plates closely is connected with cylindrical load-carrying ring front end; cylindrical load-carrying ring rear end closely is connected with supporting body; supporting body, cylindrical load-carrying ring, anchor clamps intermediate plate are passed in the end of removing protective sleeve of no binding type steel strand; have the no binding type steel strand of protective sleeve to tie up VC plastics Grouting Pipe outward, the rear end is connected with locator.
2, fixture type recoverable anchor rod according to claim 1 is characterized in that cylindrical load-carrying ring (1) has conical emptying aperture, and anchor clamps intermediate plate (2) has the coning angle that matches with conical emptying aperture, and coning angle and conical emptying aperture closely cooperate
3, fixture type recoverable anchor rod according to claim 1 is characterized in that load-carrying ring (1) outer wall has twice otch (9), and one otch (8) arranged at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201922073U CN201301448Y (en) | 2008-11-11 | 2008-11-11 | Clamp-type recoverable anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201922073U CN201301448Y (en) | 2008-11-11 | 2008-11-11 | Clamp-type recoverable anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201301448Y true CN201301448Y (en) | 2009-09-02 |
Family
ID=41085071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201922073U Expired - Fee Related CN201301448Y (en) | 2008-11-11 | 2008-11-11 | Clamp-type recoverable anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201301448Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949151A (en) * | 2010-09-28 | 2011-01-19 | 张继红 | Recyclable locking anchor rod and construction method thereof |
| CN102535460A (en) * | 2012-03-12 | 2012-07-04 | 陶德明 | Method for constructing pressure dispersive type anchor rod |
| CN102733385A (en) * | 2012-05-09 | 2012-10-17 | 中国京冶工程技术有限公司 | Fully-recycled body expanding anchor rod and construction method for anchoring ground using same |
| CN103122633A (en) * | 2013-02-19 | 2013-05-29 | 中冶集团武汉勘察研究院有限公司 | Electric smelting type pressure type recyclable anchor rod technology |
-
2008
- 2008-11-11 CN CNU2008201922073U patent/CN201301448Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949151A (en) * | 2010-09-28 | 2011-01-19 | 张继红 | Recyclable locking anchor rod and construction method thereof |
| CN102535460A (en) * | 2012-03-12 | 2012-07-04 | 陶德明 | Method for constructing pressure dispersive type anchor rod |
| CN102733385A (en) * | 2012-05-09 | 2012-10-17 | 中国京冶工程技术有限公司 | Fully-recycled body expanding anchor rod and construction method for anchoring ground using same |
| CN102733385B (en) * | 2012-05-09 | 2014-11-26 | 中国京冶工程技术有限公司 | Fully-recycled body expanding anchor rod and construction method for anchoring ground using same |
| CN103122633A (en) * | 2013-02-19 | 2013-05-29 | 中冶集团武汉勘察研究院有限公司 | Electric smelting type pressure type recyclable anchor rod technology |
| CN103122633B (en) * | 2013-02-19 | 2015-08-19 | 中冶集团武汉勘察研究院有限公司 | Electric-melting pressure-type recoverable anchor rod construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20101111 |