CN103498690B - A kind of two anchor cable combined locking devices and methods therefor - Google Patents
A kind of two anchor cable combined locking devices and methods therefor Download PDFInfo
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- CN103498690B CN103498690B CN201310395658.2A CN201310395658A CN103498690B CN 103498690 B CN103498690 B CN 103498690B CN 201310395658 A CN201310395658 A CN 201310395658A CN 103498690 B CN103498690 B CN 103498690B
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- anchor cable
- steel strand
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- anchor
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000004873 anchoring Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
<b> the present invention relates to a kind of two anchor cable combined locking device and method, this pair of anchor cable combined locking device comprises screw-threaded coupling section and intermediate plate ground tackle locking section, described screw-threaded coupling section is provided with anchor cable steel strand, anchor cable steel strand joint match is through the center of supporting plate, anchor cable steel strand are set with screw shell, screw shell is positioned at the bottom of supporting plate and is close to supporting plate, and screw shell and supporting plate are fixed together by nut; Intermediate plate ground tackle locking section is provided with a two anchor cable connector, two anchor cable connector has two anchor cable holes, is fixed after one end of two anchor cable steel strand is each passed through upper and lower anchor cable hole by strand tapered anchorage; Two anchor cable combined locking method comprises boring, preparation anchor cable, anchoring anchor cable, two anchor cable combined locking, the independent stretch-draw locking of anchor cable.This pair of anchor cable combined locking device and method makes the integer support stabilized soil pavement of anchorage cable anchoring system all be improved, safe and reliable, and structure is simple, easy for installation, has practicality widely.</b>
Description
Technical field
the present invention relates to a kind of two anchor cable device, especially effectively can strengthen the two anchor cable combined locking device and method of one of cable bolting system reliability.
Background technology
last century the mid-1960s, Australia mine uses anchor cable to carry out rock mass reinforcing first, within 1996, small-bore prestress anchorage cable is tested at China's coal-mine stope drift active workings and succeeds, there is the advantages such as pretightning force is large, supporting capacity is high, simple installation, nowadays one of cable bolting main support form having become coal mine roadway due to cable bolting.But the locking mechanism of anchor cable adopts single strand tapered anchorage to lock mostly in the prior art, when roadway deformation amount is comparatively large, anchor cable is stressed higher, under heavily stressed corrosion and chemical corrosion, easily there is slippage between intermediate plate and steel strand and cause cable bolting to lose efficacy in ground tackle.
girders anchorage cable support technology has obvious superiority in mine timbering, in roadway deformation process, in girders anchorage cable system, many anchor cables carry jointly, tunnel shoulder nest and middle part stress are concentrated or the obvious region of displacement, girders anchorage cable can provide effective active force in level and vertical simultaneously, make integer support expanded range, and in country rock, form compressive stress district, effectively can improve the tensile stress in the intensity of coal and rock, reduction coal and rock.The locking mechanism of general truss anchor cable is strand tapered anchorage and girders anchorage cable connector composition, a failure of cable in Bracing Process once in girders anchorage cable system often causes the sync fail of other anchor cables on girders anchorage cable connector, the integer support of girders anchorage cable is finally caused to lose efficacy, the extreme influence performance of anchor cable and truss performance.
Summary of the invention
in order to solve the problem lost efficacy at existing cable bolting structure easy glide, the invention provides a kind of two anchor cable combined locking device and method, this pair of anchor cable combined locking device and method adopts screw-threaded coupling to lock with strand tapered anchorage the method combined, devise the locking device that simultaneously can realize two anchor cable associating stretch-draw lockings and the independent stretch-draw locking of each anchor cable, while guaranteeing that larger pretightning force is realized to anchor cable, change the limitation of anchor cable single strand tapered anchorage stretch-draw pretension, avoid the steel strand slippage occurred when adopting single strand tapered anchorage and cause failure of cable phenomenon, the integer support stabilized soil pavement of anchorage cable anchoring system is all improved, safe and reliable, structure is simple, easy for installation, there is practicality widely.
the technical solution adopted for the present invention to solve the technical problems is: this pair of anchor cable combined locking device comprises screw-threaded coupling section and intermediate plate ground tackle locking section, described screw-threaded coupling section is provided with the anchor cable steel strand of a L shape, anchor cable steel strand joint match is through the center of supporting plate, anchor cable steel strand coincide and is set with screw shell, screw shell is positioned at the bottom of supporting plate and is close to supporting plate, and screw shell and supporting plate are fixed together by nut; Described intermediate plate ground tackle locking section is provided with the two anchor cable connector of a steel, two anchor cable connector has two anchor cable holes of upper and lower parallel correspondence, is fixed after one end of two anchor cable steel strand is each passed through upper and lower anchor cable hole by strand tapered anchorage; The length L of anchor cable hole hole depth a, an anchor cable hole pitch of holes b and anchor cable steel strand should meet following relational expression: a+b/2+300mm < L < a+b/2+500mm.
described supporting plate is for lifting plate, and long 100-300mm, wide 100-300mm, thick 10-15mm, material can be 2,3,4,5 grades of steel.
described thread bush tube length 100-200mm, diameter is 22mm, and nut is standard nut, matches with screw shell.
two anchor cable combined locking method the steps include:
1. anchor cable of constructing is holed, according to roadway support design scheme, in roadway's sides or top board construction two anchor cable borings, require that the length L of an anchor cable hole hole depth a and anchor cable hole pitch of holes b and anchor cable steel strand matches, so that anchor cable protruded length can realize the combined locking between two anchor cable;
2. prepare anchor cable, steel sleeve is fixed on by forging and stamping, welding or bonding mode and locates apart from anchor cable afterbody b/2+300mm to b/2+800mm, then external screw thread processing carried out to steel sleeve and make screw shell, the permanent position of screw shell on anchor cable steel strand should be guaranteed after after two anchor cable united locking, screw shell is just in time in drilling orifice position, so that nut screw connection screw shell carries out independent stretch-draw locking to anchor cable; Secondly, treat the anchor cable steel strand cover mounting plate being fixed with screw shell of combined locking to two, and nut is screwed onto on the screw shell that matches with it;
3. anchoring anchor cable, by resin anchoring agent, carries out end anchorage or the extensible bolting respectively to two anchor cable steel strand, requires that two anchor cable steel strand are all sent at the bottom of drilling hole;
4. pair anchor cable combined locking, after two anchor cable steel strand anchorings are stable, by the free end of two anchor cable steel strand through the two anchor cable connector of the same steel having parallel double anchor cable hole, by anchorage cable stretching equipment, stretch-draw is carried out to two anchor cable steel strand simultaneously, and adopt strand tapered anchorage to lock two anchor cable steel strand respectively, realize two anchor cable combined locking, when stretch-draw is carried out to anchor cable steel strand, require that the prestressing force being applied to anchor cable is 100-400kN;
5. the independent stretch-draw locking of anchor cable, utilize torque wrench to rotate nut on screw shell simultaneously, make that nut is closely connected presses supporting plate, realize the independent stretch-draw locking to two anchor cables, prevent two anchor cables of combined locking from causing two anchor cable all to lose efficacy because strand tapered anchorage lost efficacy, when rotating nut carries out independent stretch-draw locking to anchor cable steel strand, moment of torsion is 300-500Nm.
the invention has the beneficial effects as follows, this pair of anchor cable combined locking device and method adopts screw-threaded coupling to lock with strand tapered anchorage the method combined, devise the locking device that simultaneously can realize two anchor cable associating stretch-draw lockings and the independent stretch-draw locking of each anchor cable, while guaranteeing that larger pretightning force is realized to anchor cable, change the limitation of anchor cable single strand tapered anchorage stretch-draw pretension, avoid the steel strand slippage occurred when adopting single strand tapered anchorage and cause failure of cable phenomenon, the integer support stabilized soil pavement of anchorage cable anchoring system is all improved, safe and reliable, structure is simple, easy for installation, there is practicality widely.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described.
fig. 1 is structural principle schematic diagram of the present invention.
in Fig. 1,1. hole wall, 2. anchor cable steel strand, 3. screw-threaded coupling section, 4. supporting plate, 5. nut, 6. screw shell, 7. intermediate plate ground tackle locking section, 8. pair anchor cable connector, 9. strand tapered anchorage.
Detailed description of the invention
in FIG, this pair of anchor cable combined locking device comprises screw-threaded coupling section 3 and intermediate plate ground tackle locking section 7, described screw-threaded coupling section 3 is provided with the anchor cable steel strand 2 of a L shape, anchor cable steel strand 2 joint match is through the center of supporting plate 4, anchor cable steel strand 2 coincide and is set with screw shell 6, screw shell 6 is positioned at the bottom of supporting plate 4 and is close to supporting plate 4, and screw shell 6 and supporting plate 4 are fixed together by nut 5; Described intermediate plate ground tackle locking section 7 is provided with the two anchor cable connector 8 of a steel, two anchor cable connector 8 has two anchor cable holes of upper and lower parallel correspondence, is fixed after one end of two anchor cable steel strand 2 is each passed through upper and lower anchor cable hole by strand tapered anchorage 9; The length L of anchor cable hole hole depth a, an anchor cable hole pitch of holes b and anchor cable steel strand should meet following relational expression: a+b/2+300mm < L < a+b/2+500mm.
described supporting plate 4 is for lifting plate, and long 200mm, wide 200mm, thick 12mm, material can be 2,3,4,5 grades of steel.
the long 150mm of described screw shell 6, diameter is 22mm, and nut is standard nut, matches with screw shell 6.
two anchor cable combined locking method the steps include:
1. anchor cable of constructing is holed, according to roadway support design scheme, in roadway's sides or top board construction two anchor cable borings, require that the length L of an anchor cable hole hole depth a and anchor cable hole pitch of holes b and anchor cable steel strand matches, so that anchor cable protruded length can realize the combined locking between two anchor cable;
2. prepare anchor cable, steel sleeve is fixed on by forging and stamping, welding or bonding mode and locates apart from anchor cable afterbody b/2+300mm to b/2+800mm, then external screw thread processing carried out to steel sleeve and make screw shell 6, the permanent position of screw shell 6 on anchor cable steel strand 2 should be guaranteed after after two anchor cable united locking, screw shell 6 is just in time in drilling orifice position, so that nut 5 matching thread sleeve 6 pairs of anchor cables carry out independent stretch-draw locking; Secondly, treat that the anchor cable steel strand 2 being fixed with screw shell 6 of combined locking overlap mounting plate 4 to two, and nut 5 is screwed onto on the screw shell 6 that matches with it;
3. anchoring anchor cable, by resin anchoring agent, carries out end anchorage or the extensible bolting respectively to two anchor cable steel strand 2, requires that two anchor cable steel strand 2 are all sent at the bottom of drilling hole;
4. pair anchor cable combined locking, after the anchoring of two anchor cable steel strand 2 is stable, by the free end of two anchor cable steel strand 2 through the two anchor cable connector 8 of the same steel having parallel double anchor cable hole, by anchorage cable stretching equipment, stretch-draw is carried out to two anchor cable steel strand 2 simultaneously, and adopt strand tapered anchorage 9 to lock two anchor cable steel strand 2 respectively, realize two anchor cable combined locking, when stretch-draw is carried out to anchor cable steel strand 2, require that the prestressing force being applied to anchor cable is 250kN;
5. the independent stretch-draw locking of anchor cable, utilize torque wrench to rotate nut 5 on screw shell 6 simultaneously, make that nut 5 is closely connected presses supporting plate 4, realize the independent stretch-draw locking to two anchor cables, prevent two anchor cables of combined locking from causing two anchor cable all to lose efficacy because strand tapered anchorage 9 lost efficacy, when rotating nut 5 pairs of anchor cable steel strand 2 carry out independent stretch-draw locking, moment of torsion is 400Nm.
Claims (4)
1. a two anchor cable combined locking device, this pair of anchor cable combined locking device comprises screw-threaded coupling section (3) and intermediate plate ground tackle locking section (7), it is characterized in that, described screw-threaded coupling section (3) is provided with the anchor cable steel strand (2) of a L shape, anchor cable steel strand (2) joint match is through the center of supporting plate (4), upper the coincideing of anchor cable steel strand (2) is set with screw shell (6), screw shell (6) is positioned at the bottom of supporting plate (4) and is close to supporting plate (4), and screw shell (6) and supporting plate (4) are fixed together by nut (5); Described intermediate plate ground tackle locking section (7) is provided with the two anchor cable connector (8) of a steel, two anchor cable connector (8) has two anchor cable holes of upper and lower parallel correspondence, one end of two anchor cable steel strand (2) is fixed by strand tapered anchorage (9) after being each passed through upper and lower anchor cable hole; The length L of anchor cable hole hole depth a, anchor cable hole pitch of holes b and anchor cable steel strand (2) should meet following relational expression: a+b/2+300mm < L < a+b/2+500mm.
2. the two anchor cable combined locking device of one according to claim 1, it is characterized in that, described supporting plate (4) is for lifting plate, and long 100-300mm, wide 100-300mm, thick 10-15mm, material can be 2,3,4,5 grades of steel.
3. the two anchor cable combined locking device of one according to claim 1, it is characterized in that, described screw shell (6) long 100-200mm, diameter is 22mm, and nut is standard nut, matches with screw shell (6).
4. the locking method of a kind of pair of anchor cable combined locking device according to claim 1, it is characterized in that, described method the steps include: the boring of construction anchor cable, according to roadway support design scheme, in roadway's sides or top board construction two anchor cable borings, anchor cable protruded length requires that the length L of anchor cable hole hole depth a and anchor cable hole pitch of holes b and anchor cable steel strand (2) matches, so that can realize the combined locking between two anchor cable; Prepare anchor cable, steel sleeve is fixed on by forging and stamping, welding or bonding mode and locates apart from anchor cable afterbody b/2+300mm to b/2+800mm, then external screw thread processing carried out to steel sleeve and make screw shell (6), after two anchor cable united locking should be guaranteed in the permanent position of screw shell (6) on anchor cable steel strand (2), screw shell (6) is just in time in drilling orifice position, so that nut (5) matching thread sleeve (6) carries out independent stretch-draw locking to anchor cable; Secondly, treat the anchor cable steel strand (2) cover mounting plate (4) being fixed with screw shell (6) of combined locking to two, and nut (5) is screwed onto on the screw shell (6) that matches with it; Anchoring anchor cable, by resin anchoring agent, carries out end anchorage or the extensible bolting respectively to two anchor cable steel strand (2), requires that two anchor cable steel strand (2) are all sent at the bottom of drilling hole; Two anchor cable combined locking, after the anchoring of two anchor cable steel strand (2) is stable, by the free end of two anchor cable steel strand (2) through the two anchor cable connector (8) of the same steel having parallel double anchor cable hole, by anchorage cable stretching equipment, stretch-draw is carried out to two anchor cable steel strand (2) simultaneously, and adopt strand tapered anchorage (9) to lock two anchor cable steel strand (2) respectively, realize two anchor cable combined locking, when stretch-draw is carried out to anchor cable steel strand (2), require that the prestressing force being applied to anchor cable is 100-400kN; The independent stretch-draw locking of anchor cable, utilize torque wrench to rotate nut (5) on screw shell (6) simultaneously, make that nut (5) is closely connected presses supporting plate (4), realize the independent stretch-draw locking to two anchor cables, prevent two anchor cables of combined locking from causing two anchor cable all to lose efficacy because strand tapered anchorage (9) lost efficacy, when rotating nut (5) carries out independent stretch-draw locking to anchor cable steel strand (2), moment of torsion is 300-500Nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310395658.2A CN103498690B (en) | 2013-09-04 | 2013-09-04 | A kind of two anchor cable combined locking devices and methods therefor |
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| CN201310395658.2A CN103498690B (en) | 2013-09-04 | 2013-09-04 | A kind of two anchor cable combined locking devices and methods therefor |
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| CN103498690B true CN103498690B (en) | 2016-03-02 |
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| CN106523004B (en) * | 2016-12-23 | 2019-04-30 | 山东大学 | Rigid lock foot anchoring stock combination supporting device and installation method after a kind of elder generation is soft |
| CN108104852B (en) * | 2017-12-18 | 2019-05-14 | 中国矿业大学 | A kind of low stretch-draw anchor construction method reducing loss of prestress |
| CN112483147B (en) * | 2020-12-25 | 2023-07-14 | 江苏宝利国际投资股份有限公司 | Opposite-penetrating double-locking anchor cable supporting system for reinforcing soft rock columns of double-hole highway tunnel |
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| JPS60167894A (en) * | 1984-02-09 | 1985-08-31 | 三井造船株式会社 | Chain winder |
| CN2708037Y (en) * | 2004-07-09 | 2005-07-06 | 中国矿业大学 | Double tensile steel strand coupler |
| CN201810327U (en) * | 2009-11-29 | 2011-04-27 | 蔺少春 | Steel strand anchor rod of extruding anchor with external threads |
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Inventor after: Li Guichen Inventor after: Zhang Nong Inventor after: Sun Hui Inventor after: Sun Yuantian Inventor after: Gao Kai Inventor after: Wei Yinghao Inventor after: Ma Zhenqian Inventor after: Wang Pengpeng Inventor before: Li Guichen Inventor before: Sun Hui Inventor before: Wei Yinghao Inventor before: Zhang Nong Inventor before: Wang Pengpeng Inventor before: Ma Zhenqian |
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