CN101638892B - Pressure-yielding anchorage device and reclaimable anchor cable - Google Patents
Pressure-yielding anchorage device and reclaimable anchor cable Download PDFInfo
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- CN101638892B CN101638892B CN2008100737135A CN200810073713A CN101638892B CN 101638892 B CN101638892 B CN 101638892B CN 2008100737135 A CN2008100737135 A CN 2008100737135A CN 200810073713 A CN200810073713 A CN 200810073713A CN 101638892 B CN101638892 B CN 101638892B
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Abstract
The invention discloses a pressure-yielding anchorage device and a reclaimable anchor cable. The pressure-yielding anchorage device is formed by extruding and anchoring an extruding sleeve and an anchoring medium on prestressing tendons. The reclaimable anchor cable comprises an anchor cable body and a multilevel cable body bearing structure, the bearing structures at all levels are pressure-yielding bearing structures, the first-level bearing structure of the cable body consists of a pressure-yielding anchorage device I and a bearing plate I, the rest bearing structures at all levels only consist of pressure-yielding anchorage devices II or consist of pressure-yielding anchorage devices II and bearing plates, the pressure-yielding point of the pressure-yielding anchorage device I is larger than that of the pressure-yielding anchorage device II, the lengths of all the prestressing tendons for forming the anchor cable body are equal, and the number of the cable body bearing structures is identical. The reclaimable anchor cable adopts the single prestressing tendon reclaimable system, and a plurality of stranded cables can be flexibly assembled. Therefore, the fabrication is convenient, and the cost is low; the lengths of all the prestressing tendons are equal, the stress of the cable body is evener, and the stress is reliable; the overall tensioning and construction are simplerand more convenient; and the single pressure-yielding anchorage device is adopted, the unlocking is simple, and the recycling is reliable.
Description
Technical field:
The present invention relates to a kind of anchor cable and ground tackle, particularly a kind of recyclable type anchor cable and a kind of pressure ground tackle that lets.
Background technology:
Development along with modern building technology; Urban construction is constantly to highrise building and underground space development; Both need the infrastructure space equally; Thereby can not cross as building facilities and to build red line and invade other underground space, the cable body steel strand of foundation ditch cable bolting are reclaimed the needs that embodied urban construction, also meet environmental protection requirement.
Existing domestic and international recyclable anchor cable system all exists cable body complex structure, cost recovery problem of higher; Like the recyclable anchor cable of U type of Japan, patent announcement number is: " the recoverable prestress anchorage cable " of CN200964593Y all is to adopt U type supporting body structure, its U type supporting body complex structure; Cost of manufacture is very high, after steel strand are processed the U type, has influenced the intensity of steel strand itself; The reduction of having to is used, and this has also increased the cost of cable body, and reclaims the back steel strand and be wavy; Can not recover the original wire of steel strand, thereby steel strand can not be reused.Figure 11-13 representes a kind of structural representation with recyclable anchor cable of U type supporting body structure.
In addition, along with the development of ground prestressing technique, the permanent anchoring of high slope and the degree of depth of underground mining stope driving; Its geologic body will produce bigger distortion; If carry out supporting with conventional ground tackle, it can not discharge the geologic body crushed element, reduces distortion with this and increases the influence to cable body; With being increased along with the distortion of reinforcing geologic body, the reinforcing steel strand cause increasing substantially of stress; Cause that the disrumpent feelings accident of steel strand happens occasionally when serious, the long-acting anchoring property of cable body is had significant impact, thereby be the important hidden danger of engineering safety operation.
Summary of the invention:
The technical problem that the present invention will solve is: a kind of type anchor cable simple in structure, recyclable is provided; It can guarantee the prestressed realization of anchor cable reliably; When needs carry out the recovery of anchor cable cable body; Can the cable body steel strand be pressed release the ground tackle from letting again, steel strand are returned from the soil body, to solve problems such as complex structure, cost of manufacture that the recyclable anchor cable of above-mentioned existing U type exists are very high, steel strand can not be reused.
Simultaneously, the present invention provides also that this recyclable type anchor cable uses a kind of have yielding property can let the pressure ground tackle, with the anchoring that realizes recyclable type anchor cable and reclaim function.
The technical scheme that solves its above-mentioned technical problem is: a kind of recyclable type anchor cable; Comprise outer anchor head part and interior anchoring section; Should comprise anchor cable cable body and multilevel cable body bearing structure by interior anchoring section; Described bearing structure at different levels by let press ground tackle or let press that ground tackle and bearing plate form let the pressure bearing structure; The first order of cable body lets and presses bearing structure is to let press ground tackle I and bearing plate to form, and all the other are at different levels to let and press bearing structure or only press ground tackle II to form or by letting pressure ground tackle II and bearing plate form jointly, the described pressure ground tackle that lets is to comprise extruded sleeve and anchoring medium by letting; By the extruding of extruded sleeve and anchoring medium be anchored at form on the presstressed reinforcing steel let the pressure ground tackle; One end of each root presstressed reinforcing steel of said formation anchor cable cable body is let the extruded sleeve of pressing ground tackle I respectively, and extruding is anchored on the bearing plate I with anchoring medium, let press ground tackle I let pressure point greater than letting the pressure point of pressing ground tackle II, that is: let and press slip pulling force that ground tackle I bears greater than the slip pulling force that lets pressure ground tackle II bear.
The further technical scheme of a kind of recyclable type anchor cable of the present invention is: each root presstressed reinforcing steel length of said formation anchor cable cable body all equates, let on every presstressed reinforcing steel and press bearing structure quantity identical.
Letting of the present invention presses the technical scheme of ground tackle to be: a kind of pressure ground tackle that lets, comprise extruded sleeve and anchoring medium, and extruding is anchored on the presstressed reinforcing steel extruded sleeve with anchoring medium, and formation lets the pressure ground tackle.
Described anchoring medium is that cross section is a spring wire witha circular;
Described presstressed reinforcing steel or steel strand or steel tendon or have the unbonded prestressing tendon of sleeve pipe, described unbonded prestressing tendon is processed by steel strand or steel tendon.
Letting of the present invention presses ground tackle to comprise extruded sleeve and anchoring medium; Extruding through the extruding facility; The extruding of extruded sleeve and anchoring medium is anchored at formed one on the presstressed reinforcing steel and let the pressure ground tackle, it lets the press reason be: externally under the tension, presstressed reinforcing steel relative anchoring medium under certain pulling force is done the constant force slip with extruded sleeve; Extruded sleeve and anchoring medium play the anchoring effect to presstressed reinforcing steel when being lower than this value of thrust, and presstressed reinforcing steel does not slide.When presstressed reinforcing steel was done the constant force slip, anchoring medium was not damaged presstressed reinforcing steel, does not influence its mother metal performance.Its beneficial effect is:
1, this lets and presses ground tackle can let the large deformation geologic body in anchoring, the injurious deformation appropriateness discharged, and has safeguarded the long-term effect of anchoring, guarantees the reliability of anchoring, for the engineering operation provides safety guarantee.
2, adopt single presstressed reinforcing steel let the pressure ground tackle, many presstressed reinforcing steels can be assembled flexibly, and easy to make, cost is low.
3, let the pressure ground tackle not damage presstressed reinforcing steel, do not influence its mother metal performance.
4, adopt and to let pressures in the hole, do not influence hole space outerpace use.
5, the compressive strain amount can be regulated, can adapt to different requirement of engineering.
Because the anchor cable cable body of the present invention's recyclable type anchor cable is made up of many presstressed reinforcing steels of equal in length; Described bearing structure at different levels all is to let the pressure bearing structure; First order bearing structure is to let press ground tackle I and bearing plate to form; All the other are at different levels to let and presses bearing structure or only press ground tackle II to form or by letting pressure ground tackle II and bearing plate form jointly by letting; Let and press ground tackle under design stress, the anchored force to the anchor cable presstressed reinforcing steel steadily to discharge, presstressed reinforcing steel slides letting press in the ground tackle, thereby makes the stressed automatic distribution of each grade bearing structure; Whole stress is even, can reliably guarantee the prestressed realization of anchor cable.During design; Make let press ground tackle I let pressure point greater than letting the pressure point of pressing ground tackle II, that is: make to let and press slip pulling force that ground tackle I bears greater than letting the slip pulling force of pressing ground tackle II to bear, thereby guarantee to carry out the anchor cable cable body when reclaiming at needs; Applying greater than letting presses ground tackle I let the pulling force of pressure point; Just can the cable body presstressed reinforcing steel be pressed release the ground tackle from letting, the cable body presstressed reinforcing steel is returned from the soil body, so that use next time.Thereby the present invention's recyclable type anchor cable has following beneficial effect:
1, adopt the recyclable system of single presstressed reinforcing steel, many presstressed reinforcing steels can be assembled flexibly, and easy to make, cost is low.
2, each root presstressed reinforcing steel length of anchor cable is the same, and cable body stress is more even, and is stressed reliable.
3, integral tension, but single tension to value of thrust, it is more easy to construct.
4, adopt the single pressure ground tackle that lets, release is simple, reclaims reliable.
5, reclaiming the back presstressed reinforcing steel can reuse, and does not influence its mother metal performance.
Press the technical characterictic of ground tackle and recyclable type anchor cable to be further described below in conjunction with accompanying drawing and embodiment to the present invention's a kind of letting.
Description of drawings:
Fig. 1～Fig. 4: letting of the embodiment of the invention one pressed the structural representation of ground tackle:
Fig. 1-presstressed reinforcing steel is steel strand or steel tendon (the main sectional view of looking),
The A-A sectional drawing of Fig. 2-Fig. 1,
Fig. 3, Fig. 4-presstressed reinforcing steel are the unbonded prestressing tendon (the main sectional view of looking) that has sleeve pipe;
The structural representation of Fig. 5～Fig. 8: embodiment two said recyclable type anchor cables:
Fig. 5-overall structure signal, the B-B sectional drawing of Fig. 6-Fig. 5,
The C-C sectional drawing of Fig. 6-Fig. 5, the D-D sectional drawing of Fig. 7-Fig. 5;
The structural representation of Fig. 9～Figure 10: embodiment three said recyclable type anchor cables:
Fig. 9-overall structure signal, the E-E sectional drawing of Figure 10-Fig. 9;
Figure 11～Figure 13: the structural representation of the existing recyclable anchor cable of U type:
Figure 11-overall structure signal, the F-F sectional drawing of Figure 12-Figure 11, the G-G sectional drawing of Figure 13-Figure 11.
Among Fig. 1～Fig. 4:
81-extruded sleeve, 82-anchoring medium, 831-presstressed reinforcing steel, 832-unbonded prestressing tendon, 84-sleeve pipe;
Among Fig. 5～Figure 13:
1-ground tackle, 2-anchor plate, 3-spiral bar, 4-pre-buried pipe; 5-isolating frame, 6-presstressed reinforcing steel, 7-bearing plate III, 8-let and press ground tackle II; 9-bearing plate II, 10-let and press ground tackle II, 11-bearing plate I, 12-let and press ground tackle I; 13-guiding cap, 14-U type supporting body II, 15-U type supporting body I.
The specific embodiment:
Embodiment one:
A kind of pressure ground tackle that lets is made up of extruded sleeve 81 and anchoring medium 82, and extruded sleeve 81 pushes to be anchored to form on the presstressed reinforcing steel to let with anchoring medium 82 presses ground tackle (referring to Fig. 1); Described anchoring medium 82 is that cross section is a spring wire witha circular, and described presstressed reinforcing steel 831 is steel strand or steel tendon (referring to Fig. 2).
As a kind of conversion of the embodiment of the invention, described presstressed reinforcing steel also can be its outer unbonded tendon 832 (referring to Fig. 3,4) that is with sleeve pipe 84, and this unbonded tendon is processed by steel strand or steel tendon; When it is outer when being with the unbonded tendon 32 of sleeve pipe 4 with extruded sleeve 1 and anchoring medium 2 anchorings, that part of sleeve pipe that be between anchoring medium 2 and the presstressed reinforcing steel is divested, extruded sleeve 1 and anchoring medium 2 directly are anchored on the presstressed reinforcing steel.
Embodiment two:
A kind of recyclable type anchor cable; Like Fig. 5～shown in Figure 8; This anchor cable comprises outer anchor head part and the interior anchoring section that is made up of ground tackle 1, anchor plate 2, spiral bar 3, pre-buried pipe 4, isolating frame 5; Should comprise anchor cable cable body and multilevel cable body bearing structure by interior anchoring section, described anchor cable cable body is made up of 4 presstressed reinforcing steels of equal in length; Described bearing structure at different levels all by let press that ground tackle and bearing plate form let the pressure bearing structure; Describedly let to press ground tackle be embodiment one described extruded sleeve 81 and the anchoring medium 82 of comprising, 82 extruding are anchored at letting of forming on the presstressed reinforcing steel and press ground tackle (referring to Fig. 1～Fig. 4) with anchoring medium by extruded sleeve 81.
In the present embodiment; Respectively let press bearing structure that spacing is set is identical; The first order of cable body lets presses bearing structure to press ground tackle I12 and bearing plate I11 to form by letting; One end of each root presstressed reinforcing steel of said formation anchor cable cable body be anchored on the bearing plate I11 by to be let the extruded sleeve 81 and anchoring medium 82 extruding of pressing ground tackle I respectively; The second level on each root presstressed reinforcing steel lets presses bearing structure to press ground tackle II10 and bearing plate II9 to form by letting; The third level lets presses bearing structure to press ground tackle II8 and bearing plate III7 to form by letting, let press ground tackle I let pressure point greater than letting the pressure point of pressing ground tackle II, that is: let slip pulling force that pressure ground tackle I bears greater than the slip pulling force that lets pressure ground tackle II bear; Each root presstressed reinforcing steel length of said formation anchor cable cable body all equates, bearing structure quantity is identical on every presstressed reinforcing steel.
A kind of conversion as present embodiment; The number of the presstressed reinforcing steel of said formation anchor cable cable body also can increase and decrease; Letting of cable body presses the progression of bearing structure can increase and decrease as required; Press bearing structure press ground tackle I12 and bearing plate I11 form by letting except that the first order lets, the second level lets presses bearing structure and later pressure bearing structures that let at different levels all by letting pressure ground tackle II and bearing plate at different levels form.
Embodiment three:
A kind of recyclable type anchor cable; Like Fig. 9～shown in Figure 10; Its basic structure is with embodiment two; The first order of cable body lets presses bearing structure to press ground tackle I12 and bearing plate I11 to form by letting; One end of each root presstressed reinforcing steel of said formation anchor cable cable body is let the extruded sleeve 81 of pressing ground tackle I respectively, and 82 extruding are anchored on the bearing plate I11 with anchoring medium, describedly let to press ground tackle II8 be embodiment one described extruded sleeve 81 and the anchoring medium 82 of comprising, by extruded sleeve 81 with anchoring medium 82 extruding be anchored at form on presstressed reinforcing steel 831 or 832 let the pressure ground tackle;
Be with embodiment two differences: all the other bearing structures at different levels on each root presstressed reinforcing steel all be only by let press that ground tackle II8 forms let the pressure bearing structure; At different levels let press bearing structure that spacing is set is inequality; Make things convenient for the cable body assembling, holistic resistant behavior is better.Its structure such as Fig. 9～shown in Figure 10.
Claims (5)
1. recyclable type anchor cable; Comprise outer anchor head part and interior anchoring section; Should comprise anchor cable cable body and multilevel cable body bearing structure by interior anchoring section; It is characterized in that: the bearing structures at different levels of said multilevel cable body bearing structure by let press ground tackle or by let press that ground tackle and bearing plate form let the pressure bearing structure; The first order of cable body lets and presses bearing structure is to let press ground tackle I and bearing plate I to form; All the other are at different levels to let and presses bearing structure or only press ground tackle II to form or press ground tackle II and bearing plate to form jointly by letting by letting, described let press ground tackle be by extruded sleeve with anchoring medium extruding be anchored at form on the presstressed reinforcing steel let the pressure ground tackle, an end of each root presstressed reinforcing steel of formation anchor cable cable body pushed by to be let extruded sleeve and the anchoring medium of pressure ground tackle I respectively and is anchored on the bearing plate I; Let press ground tackle I let pressure point greater than letting the pressure point of pressing ground tackle II, that is: let and press slip pulling force that ground tackle I bears greater than letting the slip pulling force of pressing ground tackle II to bear.
2. a kind of recyclable type anchor cable according to claim 1 is characterized in that: each root presstressed reinforcing steel length of said formation anchor cable cable body all equates, let on every presstressed reinforcing steel and press bearing structure quantity identical.
3. recyclable type anchor cable according to claim 1 and 2 is characterized in that: at different levels let press bearing structure spacing or identical or inequality is set.
4. recyclable type anchor cable according to claim 1 and 2; It is characterized in that: the said anchoring medium of pressure ground tackle that lets is that cross section is a spring wire witha circular; Described presstressed reinforcing steel or steel strand or steel tendon; Or having the unbonded tendon of sleeve pipe, this unbonded tendon is processed by steel strand or steel tendon.
5. recyclable type anchor cable according to claim 3; It is characterized in that: the said anchoring medium of pressure ground tackle that lets is that cross section is a spring wire witha circular; Described presstressed reinforcing steel or steel strand or steel tendon; Or having the unbonded tendon of sleeve pipe, this unbonded tendon is processed by steel strand or steel tendon.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100737135A CN101638892B (en) | 2008-08-02 | 2008-08-02 | Pressure-yielding anchorage device and reclaimable anchor cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100737135A CN101638892B (en) | 2008-08-02 | 2008-08-02 | Pressure-yielding anchorage device and reclaimable anchor cable |
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| CN101638892A CN101638892A (en) | 2010-02-03 |
| CN101638892B true CN101638892B (en) | 2012-08-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102003195A (en) * | 2010-10-10 | 2011-04-06 | 张延策 | Recyclable anchor rope lock |
| CN103362124A (en) * | 2013-07-17 | 2013-10-23 | 重庆岩安科技有限公司 | Recoverable anchor cable for civil engineering |
| CN103758125B (en) * | 2014-01-21 | 2016-04-06 | 龚金京 | Extruding tapered end spring bearing plate stress dispersion type large-tonnage enlarged footing anchor cable |
| CN104818717B (en) * | 2015-04-29 | 2016-08-24 | 中国建筑股份有限公司 | A kind of recoverable prestressed anchor head of pressure dispersing type |
| CN104846822B (en) * | 2015-05-07 | 2016-08-17 | 重庆交通大学 | Surrender anchor cable |
| CN107513996A (en) * | 2017-10-20 | 2017-12-26 | 上海智平基础工程有限公司 | A kind of anchorage and its construction method of recoverable prestressed anchor cable |
| CN109653218B (en) * | 2019-01-09 | 2023-12-19 | 河南省交通规划设计研究院股份有限公司 | Existing engineering anchor cable prestress determination method and special anchor determination device thereof |
| CN110725547B (en) * | 2019-10-17 | 2023-08-11 | 柳州欧维姆机械股份有限公司 | Compact steel strand inhaul cable and manufacturing method thereof |
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| CN201261880Y (en) * | 2008-08-02 | 2009-06-24 | 柳州欧维姆机械股份有限公司 | Recoverable anchor cable |
| CN201261882Y (en) * | 2008-08-02 | 2009-06-24 | 柳州欧维姆机械股份有限公司 | Yielding anchorage |
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2008
- 2008-08-02 CN CN2008100737135A patent/CN101638892B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4026186A (en) * | 1976-02-23 | 1977-05-31 | Illinois Tool Works Inc. | Self-drilling one-piece masonry anchor |
| CN1084920A (en) * | 1992-09-29 | 1994-04-06 | 上海市基础工程公司 | Sheet clamping type group anchor cable and mounting method |
| CN1727600A (en) * | 2004-07-26 | 2006-02-01 | 北京市建筑工程研究院 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
| CN2795330Y (en) * | 2005-03-09 | 2006-07-12 | 柳州欧维姆机械股份有限公司 | Anchor cable with sealed extruded anchor head |
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