CN103061345A - Pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure - Google Patents
Pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure Download PDFInfo
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- CN103061345A CN103061345A CN2013100415128A CN201310041512A CN103061345A CN 103061345 A CN103061345 A CN 103061345A CN 2013100415128 A CN2013100415128 A CN 2013100415128A CN 201310041512 A CN201310041512 A CN 201310041512A CN 103061345 A CN103061345 A CN 103061345A
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Abstract
The invention relates to a pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure. With the adoption of the pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure, grouting near the bearing plates can be effectively prevented from being invalid, thus ensuring an anchorage cable of an anchorage section to work normally. According to pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure disclosed by the invention, a plate body is formed by arranging the bearing plates (2) of a circular steel plate in the anchorage section (L2) at intervals, a through hole used for installing a grouting pipe and through holes which are formed along the ring direction of a plate surface and are supplied for steel strands (5) to penetrate through are formed in the plate body, and a spiral steel bar (1) is respectively welded and fixed on the inner side plate surface of each bearing plate (2) and circumferentially wraps each steel strand (5).
Description
Technical field
The present invention relates to the geotechnical engineering reinforcing technique, particularly the anti-crushing of a kind of pressure dispersing anchorage cable injecting cement paste loaded plate structure.
Background technology
Pressure dispersing anchorage cable as a kind of novel geotechnical engineering reinforcing technique, is widely used in the Practical Project.Pressure dispersing anchorage cable has changed the stress form of traditional tension type anchor cable, and the loaded plate that anchored force is kept at a certain distance away by several piece transfers pressure-acting on the more piece anchoring body.This type of anchor cable is more even owing to bond stress, and can take full advantage of anchoring section higher advantage of compressive strength under the pressure from surrounding rock effect, greatly improves anchored force.This shows, loaded plate is the important component of pressure dispersing anchorage cable.Existing loaded plate structurally is circular steel plate, and its center has the through hole that Grouting Pipe is installed, the spaced apart through hole that passes for steel strand that is provided with of plate face hoop.
Lot of experiments and engineering practice to pressure dispersing anchorage cable show, shearing stress distribution has following features in the anchoring section: between injecting cement paste and hole wall, injecting cement paste and the steel strand, shearing stress distribution is inhomogeneous, will produce the shear stress concentration of height near bearing plate.Present engineering design method but extensively adopts the average shearing stress method, supposes that namely shear stress evenly distributes along total length in the anchoring section.The injecting cement paste supporting capacity that will occur like this being provided by designing and calculating is enough, but shear stress concentration district injecting cement paste may near the injecting cement paste of failure, especially loaded plate in the anchoring section.And injecting cement paste may cause engineering accident once failure will accelerate the corrosion of steel strand.
Summary of the invention
Technical problem to be solved by this invention provides the anti-crushing of a kind of pressure dispersing anchorage cable injecting cement paste loaded plate structure, can prevent effectively that near the injecting cement paste the loaded plate lost efficacy, to guarantee the normal operation of anchoring section anchor cable.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The anti-crushing of the present invention's one pressure dispersing anchorage cable injecting cement paste loaded plate structure, plate body is that loaded plate interval in anchoring section of circular steel plate arranges, the through hole that supplies steel strand to pass that plate body has the through hole that Grouting Pipe is installed and offers along plate face hoop interval, it is characterized in that: be welded with spiral reinforcement on the interior plate face of described loaded plate, this spiral reinforcement surrounds the steel strand hoop in the inner.
The invention has the beneficial effects as follows, the problem that pressure break is destroyed easily occurs in injecting cement paste near effectively having solved loaded plate, simultaneously because the helical spring reinforcing bar has wrapped up the slurry of anchor cable steel strand outsides, can increase its antiseptic property, therefore can effectively avoid the stretch-draw inefficacy of anchor cable and the anchored force of anchoring section to reduce.Have the characteristics such as simple in structure, anti-fracturing effect is good, construction is simple, have wide promotion prospect.
Description of drawings
This manual comprises following two width of cloth accompanying drawings:
Fig. 1 is the schematic diagram of the anti-crushing of pressure dispersing anchorage cable of the present invention injecting cement paste loaded plate structure;
Fig. 2 is the sectional drawing along A-A line among Fig. 1.
Member, position and corresponding mark among the figure: spiral reinforcement 1; Loaded plate 2; Isolation mount 3; Guiding cap 4; Steel strand 5a, steel strand 5b, steel strand 5c; Injecting cement paste 6; Grouting Pipe 7; Free segment L1, anchoring section L2.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
See figures.1.and.2, the anti-crushing of pressure dispersing anchorage cable of the present invention injecting cement paste loaded plate structure, plate body is that loaded plate 2 interval in anchoring section L2 of circular steel plate arranges the through hole that supplies steel strand 5 to pass that plate body has the through hole that Grouting Pipe is installed and offers along plate face hoop interval.Be welded with spiral reinforcement 1 on the interior plate face of described loaded plate 2, this spiral reinforcement 1 surrounds steel strand 5 hoops in the inner.Spiral reinforcement 1 can be alleviated near the pressure break destruction of loaded plate 2 injecting cement pastes greatly, because it has wrapped up the slurry of anchor cable steel strand outsides, can increase its antiseptic property simultaneously, so can effectively avoid the stretch-draw inefficacy of anchor cable and the anchored force reduction of anchoring section L2.
See figures.1.and.2, a loaded plate 2 generally has two steel strand, and its diameter is determined according to the anchor hole diameter, loaded plate 2 spacings are relevant with anchoring section L2 Rock And Soil character, be generally 2 ~ 3.5m, anchoring section L2 loaded plate 2 numbers should not surpass 5, are generally 3 ~ 4 and are advisable.Spiral reinforcement 1 diameter is generally 10 ~ 12mm, adopts the HRB335(2 level) the reinforcing bar coiling, the external diameter of its pitch of the laps and loaded plate diameter are smaller, and it is 30 ~ 40mm around distance, always around highly being 0.5 ~ 0.6m.Loaded plate 2 and spiral reinforcement 1 adopt spot welding mode firm welding.
Behind the boring excavation, steel strand 5 are imported into loaded plate 2 extruding and set loaded plate 2, and twine welding spiral reinforcement 1 near loaded plate 2.The anchor cable grouting behind shaft or drift lining is installed, is carried out anchorage cable stretching in the slip casting of anchor body and anchor pier age of concrete after greater than design age.
It is to be noted, above some principles of the anti-crushing of the described pressure dispersing anchorage cable of the present invention that just explains through diagrams injecting cement paste loaded plate structure because the those of ordinary skill in constructed field is easy to carry out on this basis some modifications and change.Therefore, this manual be not be the present invention to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify that might be utilized and equivalent all belong to the claim that the present invention applies for.
Claims (2)
1. the anti-crushing of pressure dispersing anchorage cable injecting cement paste loaded plate is constructed, plate body is that loaded plate (2) interval in anchoring section (L2) of circular steel plate arranges, the through hole that supplies steel strand (5) to pass that plate body has the through hole that Grouting Pipe is installed and offers along plate face hoop interval, it is characterized in that: be welded with spiral reinforcement (1) on the interior plate face of described loaded plate (2), this spiral reinforcement (1) surrounds steel strand (5) hoop in the inner.
2. the anti-crushing of pressure dispersing anchorage cable injecting cement paste loaded plate is constructed as claimed in claim 1, it is characterized in that: the diameter of described spiral reinforcement (1) is 10 ~ 12mm, the external diameter of its pitch of the laps is smaller than loaded plate (2) diameter, and it is around apart from being 30 ~ 40mm, always around highly being 0.5 ~ 0.6m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100415128A CN103061345A (en) | 2013-02-01 | 2013-02-01 | Pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100415128A CN103061345A (en) | 2013-02-01 | 2013-02-01 | Pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure |
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| CN103061345A true CN103061345A (en) | 2013-04-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290843A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Pre-stressed pressure-type anti-floating anchor with spiral stirrup |
| CN103758551A (en) * | 2014-01-22 | 2014-04-30 | 山东科技大学 | Multistage anchoring type resin anchor rod and anchoring method thereof |
| CN104831725A (en) * | 2015-05-28 | 2015-08-12 | 重庆大学 | Pressure-dispersing type anchor rope |
| CN107060855A (en) * | 2017-04-26 | 2017-08-18 | 安徽理工大学 | A kind of new type mining anchor cable |
| CN108104121A (en) * | 2018-01-11 | 2018-06-01 | 中冶集团武汉勘察研究院有限公司 | For improving the structure and method of pressure anchor wire cement grout body compression strength |
| CN109026104A (en) * | 2018-07-30 | 2018-12-18 | 山东嘉浩矿山机械有限公司 | A kind of hollow slip casting Mine anchorage cable |
| CN113356197A (en) * | 2021-06-30 | 2021-09-07 | 中建八局浙江建设有限公司 | Pressure dispersion type anchor cable for slope treatment |
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| JP2001011854A (en) * | 1999-06-29 | 2001-01-16 | Sumitomo Electric Ind Ltd | Corrosion-proofing structure of anchorage section in pc steel material |
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| CN203160252U (en) * | 2013-02-01 | 2013-08-28 | 中铁二院工程集团有限责任公司 | Pressure-distribution type anchor cable bearing plate structure preventing grouting bodies from being crushed |
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2013
- 2013-02-01 CN CN2013100415128A patent/CN103061345A/en active Pending
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290843A (en) * | 2013-06-04 | 2013-09-11 | 北京工业大学 | Pre-stressed pressure-type anti-floating anchor with spiral stirrup |
| CN103758551A (en) * | 2014-01-22 | 2014-04-30 | 山东科技大学 | Multistage anchoring type resin anchor rod and anchoring method thereof |
| CN104831725A (en) * | 2015-05-28 | 2015-08-12 | 重庆大学 | Pressure-dispersing type anchor rope |
| CN107060855A (en) * | 2017-04-26 | 2017-08-18 | 安徽理工大学 | A kind of new type mining anchor cable |
| CN108104121A (en) * | 2018-01-11 | 2018-06-01 | 中冶集团武汉勘察研究院有限公司 | For improving the structure and method of pressure anchor wire cement grout body compression strength |
| CN108104121B (en) * | 2018-01-11 | 2023-08-15 | 中冶集团武汉勘察研究院有限公司 | Structure and method for improving compressive strength of pressure type anchor cable cement grouting body |
| CN109026104A (en) * | 2018-07-30 | 2018-12-18 | 山东嘉浩矿山机械有限公司 | A kind of hollow slip casting Mine anchorage cable |
| CN113356197A (en) * | 2021-06-30 | 2021-09-07 | 中建八局浙江建设有限公司 | Pressure dispersion type anchor cable for slope treatment |
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Application publication date: 20130424 |