CN101245707B - Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method - Google Patents
Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method Download PDFInfo
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- CN101245707B CN101245707B CN200810004403.8A CN200810004403A CN101245707B CN 101245707 B CN101245707 B CN 101245707B CN 200810004403 A CN200810004403 A CN 200810004403A CN 101245707 B CN101245707 B CN 101245707B
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- China
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- shaped steel
- profiled bar
- joint section
- slide
- lap segment
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Abstract
A connecting method for the joint section of a U-shaped profiled bar supporter switched between contractible rigidity comprises: welding a slide-resistant block on a profiled bar which is overlapped with the joint section of the U-shaped profiled bar supporter, arranging the slide-resistant block welded on the profiled bar in front of another profile bar part of the joint sections, a distance of the slide-resistant block from the other profiled bar end of the joint section being more than 0mm to 1200mm, and the distance of the welded slide-resistant block position and the other profile bar part of the joint section being a preset contractible amount of the joint sections. After two joint sections of the profile bar are clamped by a clamp cable, the joint section of the U-shaped profiled bar supporter in the early stage can contract pressure, after the deformation of the preset contractible amount of the joint section is finished, the end part of the other profiled bar is supported on the slide-resistant block welded on the profiled bar, refuses to contract to form rigidity connection. As the connection between profiled bars adopts a joint section connecting method, the joint section of the U-shaped profiled bar supporter in the early stage can contract; the slide-resistant block welded on one profiled bar on the joint section in a late state blocks the slide of the end part of another profiled bar; under the coaction of the anti-slide static friction generated by the clamping of the clamp cable on the joint section, the joint section of the supporter can not contract and the connecting part of the profiled bar is rigid; besides, the anti-bending capacity of the connecting part is not decreased and is hard to be damaged. The U-shaped profiled bar supporter which is connected according to the method has the characteristic of switching from a contractible supporter to a rigid U-shaped profiled bar supporter and can better realize the stability of a laneway.
Description
Technical field
The present invention relates to a kind of method of attachment of roadway U-shaped steel support lap segment, lap segment method of attachment between especially a kind of U-shaped steel bracket shaped steel of rigidity that can be exchanged into high supporting intensity and large bearing capacity from compressibile support.
Background technology
At present, method of attachment between known U-shaped steel bracket shaped steel is mainly: (1) friction U-shaped steel bracket method of attachment of can contracting, shaped steel lap segment overlap length is generally 400～500mm, 2～4 vice card cable clip stressed joints for lap segment, overlapping part shaped steel is realized friction in the frictional force between shaped steel, between shap steel cable after relying on card cable clip tight and can be contracted; (2) the U-shaped steel bracket shaped steel of rigidity end is welded to connect the bolt connection (similar flange connection) of plate, on the section at U-shaped steel bracket beam, the every nodal pattern steel of leg two ends, weld rectangle junction plate, junction plate and sectional shape are welded as integral body, on junction plate, there are four bolt connecting holes, after the junction plate docking that is connected to adjacent shaped steel end between the every nodal pattern steel of U-shaped steel bracket, corresponding bolt hole tightens with bolt, and shaped steel connecting portion is rigidity.
The friction U-shaped steel bracket method of attachment of can contracting can realize the compressive strain that allows of support.But axial working resistance when existing U-shaped steel compressibile support shaped steel slides is generally 150～400kN, while being section steel material yield limit 1/4～1/11 of bearing capacity, far below the supporting capacity of section steel material.Existing U-shaped steel compressibile support, under lower working resistance, is difficult to give full play to the intensity of U-shaped Steel material; Be applied in the soft-rock tunnel that pressure is larger, bracket support intensity is still low, is difficult to realize the stable of tunnel.
Can not the contract support of U-shaped steel arch shape, circle, horseshoe type and similar shape of rigidity, can give full play to the intensity of U-shaped Steel material, and supporting capacity is large, supporting intensity is high.And the method for attachment of can not contracting between U-shaped steel bracket shaped steel of existing rigidity is that end is welded to connect after plate, junction plate docking by the fixing mode of bolt, the bending resistance of shaped steel junction reduces.When Tunnel Pressure is larger, is prone between weld cracking, junction plate and the shaped steel of shaped steel and junction plate and throws off, and cause that U-shaped steel bracket supporting capacity reduces, support destroys.And the U-shaped steel bracket of rigidity can not contract, be applied in soft rock secondary supporting tunnel, need allow after compressive strain in the supporting for the first time coordinating, as supporting for the second time, just can realize better stability of the roadway.
Summary of the invention
On the low side in order to overcome the axial working resistance of U-shaped steel compressibile support shaped steel, the U-shaped steel bracket of existing rigidity can not contract and shaped steel end is prone to the shortcoming of throwing off between weld cracking, junction plate and shaped steel by the fixing connected mode of bolt after being welded to connect plate, junction plate docking; The U-shaped steel bracket that can contract rubbing can allow compressive strain, shaped steel junction bending resistance not reduce, bring into play with the U-shaped steel bracket supporting capacity of rigidity advantage large, that supporting intensity is high simultaneously, the invention provides the U-shaped steel bracket lap segment method of attachment of changing between a kind of contracting rigidity.The U-shaped steel bracket lap segment of this method of attachment, U-shaped steel bracket lap segment of starting stage can contract and allow pressure; Be out of shape and refuse contracting after a certain amount of, become and be rigidly connected, shaped steel is operated under high workload resistance, makes full use of the intensity of U-shaped Steel material.The U-shaped steel bracket connecting according to the method has the characteristic transforming to the U-shaped steel bracket of rigidity from compressibile support.
Technical scheme of the present invention is: on a shaped steel of U-shaped steel bracket lap segment overlap joint, weld anti-skid, be welded on anti-skid the place ahead that is positioned at another shaped steel end of lap segment on this shaped steel, resistance slide position apart from the distance of another shaped steel end of lap segment for being greater than 0mm, value to 1200mm interval, the resistance slide position of welding apart from the distance of another shaped steel end of lap segment for the lap segment set can contracting amount, after two shaped steel lap segments are tight with card cable clip, the U-shaped steel bracket lap segment of initial stage can contract and allow pressure, after the lap segment of setting can contracting quantitative change shape completes, the end of another shaped steel withstands on anti-skid that has welded on this shaped steel, refuse contracting, become and be rigidly connected.Because the connection between shaped steel adopts lap segment method of attachment, the initial stage, U-shaped steel bracket lap segment can contract; The anti-skid slippage that stops another shaped steel end of having welded on later stage lap segment one shaped steel, under the acting in conjunction of the tight antiskid stiction producing of lap segment card cable clip, support lap segment can not contract, and shaped steel connecting portion is rigidity; And this junction bending resistance does not reduce, difficult destruction.
The invention has the beneficial effects as follows: the U-shaped steel bracket lap segment method of attachment of changing between can contracting rigidity has the initial stage friction U-shaped steel bracket that can contract simultaneously can allow compressive strain, and the later stage rigidity characteristic that U-shaped steel bracket supporting capacity is large, supporting intensity is high that can not contract.The U-shaped steel bracket lap segment of this method of attachment, U-shaped steel bracket lap segment of starting stage can contract and allow pressure; Be out of shape and refuse contracting after a certain amount of, become and be rigidly connected, shaped steel is operated under high workload resistance, makes full use of the intensity of U-shaped Steel material.The U-shaped steel bracket connecting according to the method has the characteristic from compressibile support to the U-shaped steel bracket conversion of rigidity, can realize better the stable of tunnel.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of U-shaped first embodiment of steel bracket lap segment method of attachment of changing between can contracting rigidity.
Fig. 2 is the schematic diagram of second embodiment of U-shaped steel bracket lap segment method of attachment of changing between can contracting rigidity.
In figure, shaped steel on 1., 2. plays shaped steel, and 3. anti-skid, 4. card cable.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
In Fig. 1, apart from shaped steel (2) end under lap segment, be greater than 0mm the upper shaped steel (1) of U-shaped steel bracket overlap joint is upper, to anti-skid (3) of the place ahead welding of 1200mm, anti-skid (3) apart from the distance of lower shaped steel (2) end for the lap segment that limits can contracting amount; The U-shaped outer surface of anti-skid (3) and upper shaped steel (1) is close to, and anti-skid (3) are welded on the upper shaped steel (1) of lap segment.After two shaped steel overlap joints, lap segment clamps with card cable (4).U-shaped steel bracket lap segment of starting stage can contract and allow pressure.After the lap segment of setting can contracting quantitative change shape completes, it is upper that the end of lower shaped steel (2) withstands on anti-skid (3) of on shaped steel (1), having welded, and refuses contracting, becomes and be rigidly connected.Now, after the skid resistance that U-shaped steel bracket lap segment connecting portion relies on shaped steel (2) end under overlapping part to withstand on to be subject on anti-skid (3) and card cable (4) clamp, at the stiction between shaped steel, between shap steel cable, realizing support lap segment rigidity can not contract.
In Fig. 2, apart from shaped steel (1) end in lap segment, be greater than 0mm the lower shaped steel (2) of U-shaped steel bracket overlap joint is upper, to anti-skid (3) of the place ahead welding of 1200mm, the lap segment that in anti-skid (3) distance, the distance of shaped steel (1) end is restriction can contracting amount; The U-shaped interior contoured surface of anti-skid (3) and lower shaped steel (2) is close to, and anti-skid (3) are welded on the lower shaped steel (2) of lap segment.After two shaped steel overlap joints, lap segment clamps with card cable (4).U-shaped steel bracket lap segment of starting stage can contract and allow pressure.After the lap segment of setting can contracting quantitative change shape completes, it is upper that the end of upper shaped steel (1) withstands on anti-skid (3) of on lower shaped steel (2), having welded, and refuses contracting, becomes and be rigidly connected.Now, after the skid resistance that U-shaped steel bracket lap segment connecting portion relies on upper shaped steel (1) end of overlapping part to withstand on to be subject on anti-skid (3) and card cable (4) clamp, at the stiction between shaped steel, between shap steel cable, realizing support lap segment rigidity can not contract.
Claims (1)
1. a U-shaped steel bracket lap segment method of attachment of changing between can contracting rigidity, it is characterized in that: on a shaped steel of U-shaped steel bracket lap segment overlap joint, weld anti-skid, be welded on anti-skid the place ahead that is positioned at another shaped steel end of lap segment on this shaped steel, resistance slide position apart from the distance of another shaped steel end of lap segment for being greater than 0mm, value to 1200mm interval, the resistance slide position of welding apart from the distance of another shaped steel end of lap segment for the lap segment set can contracting amount, after two shaped steel lap segments are tight with card cable clip, the U-shaped steel bracket lap segment of initial stage can contract and allow pressure, after the lap segment of setting can contracting quantitative change shape completes, the end of another shaped steel withstands on anti-skid that has welded on this shaped steel and refuses to contract, become and be rigidly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810004403.8A CN101245707B (en) | 2008-01-24 | 2008-01-24 | Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810004403.8A CN101245707B (en) | 2008-01-24 | 2008-01-24 | Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245707A CN101245707A (en) | 2008-08-20 |
| CN101245707B true CN101245707B (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810004403.8A Expired - Fee Related CN101245707B (en) | 2008-01-24 | 2008-01-24 | Yieldable rigidity commutation U shaped steel bracket overlap joint segment connecting method |
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| CN (1) | CN101245707B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373933A (en) * | 2011-10-05 | 2012-03-14 | 于守东 | Resistance-increasing pressure-resisting roadway support |
| CN105240034A (en) * | 2015-10-12 | 2016-01-13 | 辽宁工程技术大学 | Friction-type energy-absorbing impact-preventive component for hydraulic upright |
| CN105386780B (en) * | 2015-11-26 | 2018-02-27 | 赵西方 | Protecting against shock compressed steel structural member excavation support can shrinking structure |
| CN105422145B (en) * | 2015-12-30 | 2018-01-09 | 辽宁工程技术大学 | It is a kind of that there is the U-shaped steel collapsible timbering for increasing resistance energy-absorbing effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1177516A1 (en) * | 1984-01-05 | 1985-09-07 | Vni Pk Ugolnyj Inst | Wedge lock |
-
2008
- 2008-01-24 CN CN200810004403.8A patent/CN101245707B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1177516A1 (en) * | 1984-01-05 | 1985-09-07 | Vni Pk Ugolnyj Inst | Wedge lock |
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| CN101245707A (en) | 2008-08-20 |
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Granted publication date: 20141022 Termination date: 20170124 |