CN101245707A - 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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- CN101245707A CN101245707A CNA2008100044038A CN200810004403A CN101245707A CN 101245707 A CN101245707 A CN 101245707A CN A2008100044038 A CNA2008100044038 A CN A2008100044038A CN 200810004403 A CN200810004403 A CN 200810004403A CN 101245707 A CN101245707 A CN 101245707A
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- profiled bar
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Abstract
A connecting method for the joint sections of a U-shaped profiled bar supporter switched between contractible rigidity comprises: welding a slide-resistant block in front of a certain distance of 0 to 1200mm of another profiled bar part to the overlapping length position of the joint section on one profiled bar jointed on the U-shaped profiled bar supporter; the distance is a regulated contractible amount for the joint section; after two joint sections of the profiled 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 regulated contractible amount set on 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 the method for attachment of a kind of tunnel U shape steel bracket overlap joint section, overlap segment connecting method between especially a kind of rigidity U shape steel bracket shaped steel 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 shape steel bracket shaped steel is mainly: (1) friction U shape steel bracket method of attachment of can contracting, shaped steel overlap joint section overlap length is generally 400～500mm, the overlap joint section realizes rubbing and can contract in the frictional force between shaped steel, between shaped steel card cable with 2～4 secondary card cable clip stressed joints, the tight back of overlapping part shaped steel dependence card cable clip; (2) rigidity U shape steel bracket shaped steel end is welded to connect the bolt method of attachment (similar flange connection) of plate, welding rectangle junction plate on the section at U shape steel bracket beam, the every nodal pattern steel of leg two ends, junction plate and sectional shape are welded as integral body, four bolt connecting holes are arranged on the junction plate, after the junction plate butt joint that is connected to adjacent shaped steel end between the every nodal pattern steel of U shape steel bracket, corresponding bolt hole tightens with bolt, and the shaped steel connecting portion is a rigidity.
The friction U shape steel bracket method of attachment of can contracting can realize the compressive strain that allows of support.But the axial working resistance when existing U shaped steel compressibile support shaped steel slides is generally 150～400kN, when being shaped steel material yield limit 1/4～1/11 of bearing capacity, far below the supporting capacity of shaped steel material.Existing U shaped steel compressibile support is under the lower working resistance, is difficult to give full play to the intensity of U shaped steel material; Be applied in the bigger soft-rock tunnel of pressure, bracket support intensity is still low, is difficult to realize the stable of tunnel.
Can not the contract support of U shaped steel arch, circle, horseshoe type and similar shape of rigidity can be given full play to the intensity of U shaped steel material, and supporting capacity is big, supporting intensity is high.And can not the contract method of attachment between U shape steel bracket shaped steel of existing rigidity is that the end is welded to connect plate, the junction plate butt joint back mode with bolt, and the bending resistance of shaped steel junction reduces.When Tunnel Pressure is big, is prone between weld cracking, junction plate and the shaped steel of shaped steel and junction plate and throws off, and cause that U shape steel bracket supporting capacity reduces, support destroys.And rigidity U shape steel bracket can not contract, and is applied in the soft rock secondary supporting tunnel, needs just can realize stability of the roadway better as the supporting second time after the supporting first time that cooperates allows compressive strain.
Summary of the invention
On the low side for the axial working resistance that overcomes U shaped steel compressibile support shaped steel, existing rigidity U shape steel bracket can not contract and the shaped steel end is welded to connect plate, junction plate butt joint back is prone to the shortcoming of throwing off between weld cracking, junction plate and shaped steel with the connected mode of bolt; The U shape steel bracket that can contract rubbing can allow compressive strain, shaped steel junction bending resistance not reduce, bring into play simultaneously with rigidity U shape steel bracket supporting capacity advantage big, that supporting intensity is high, the invention provides a kind of U shape steel bracket overlap joint segment connecting method that contracts and change between rigidity.The U shape steel bracket of this method of attachment overlap joint section, starting stage U shape steel bracket overlap joint section can contract and allow pressure; Be out of shape and refuse to contract after a certain amount of, become and be rigidly connected, shaped steel is operated under the high workload resistance, makes full use of the intensity of U shaped steel material.The U shape steel bracket that connects according to this method has the characteristic that transforms to rigidity U shape steel bracket from compressibile support.
Technical scheme of the present invention is: weld anti-skid apart from the place ahead of another shaped steel end 0～1200mm certain distance of overlap joint section overlap length position on a shaped steel of U shape steel bracket overlap joint, this distance can the amount of contracting for the overlap joint section set, after two shaped steel overlap joint section uses the card cable clip tight, initial stage U shape steel bracket overlap joint section can contract and allow pressure, the overlap joint section of setting can contract after quantitative change shape finishes, the end of another shaped steel withstands on anti-skid that has welded on this shaped steel, refuses to contract, and becomes to be rigidly connected.Because the overlap joint segment connecting method is adopted in the connection between shaped steel, initial stage U shape steel bracket overlap joint section can contract; The anti-skid slippage that stops another shaped steel end of having welded on later stage overlap joint section one shaped steel, under the acting in conjunction of the tight antiskid stiction that produces of overlap joint section card cable clip, support overlap joint section can not contract, and the shaped steel connecting portion is a rigidity; And this junction bending resistance does not reduce, difficult destruction.
The invention has the beneficial effects as follows: the U shape steel bracket overlap joint segment connecting method changed between rigidity of can contracting has the initial stage friction U shape steel bracket that can contract simultaneously can allow compressive strain, and the later stage rigidity characteristic that U shape steel bracket supporting capacity is big, supporting intensity is high that can not contract.The U shape steel bracket of this method of attachment overlap joint section, starting stage U shape steel bracket overlap joint section can contract and allow pressure; Be out of shape and refuse to contract after a certain amount of, become and be rigidly connected, shaped steel is operated under the high workload resistance, makes full use of the intensity of U shaped steel material.The U shape steel bracket that connects according to this method has from the characteristic of compressibile support to the conversion of rigidity U shape steel bracket, can realize the stable of tunnel better.
Description of drawings
Fig. 1 is the schematic diagram of first embodiment of U shape steel bracket overlap joint segment connecting method of changing between rigidity of can contracting.
Fig. 2 is the schematic diagram of second embodiment of U shape steel bracket overlap joint segment connecting method of changing between rigidity of can contracting.
Shaped steel on 1. 2. plays shaped steel among the figure, and 3. anti-skid, 4. card cable.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
In Fig. 1, in anti-skid (3) of welding, the place ahead that shaped steel (1) on the U shape steel bracket overlap joint is gone up shaped steel (2) end 0～1200mm certain distance under the overlap joint section overlap length position, this distance can the amount of contracting for the overlap joint section of qualification; The U type outer surface of anti-skid (3) and last shaped steel (1) is close to, and anti-skid (3) are welded on the last shaped steel (1) of overlap joint section.Behind the two shaped steel overlap joint, the overlap joint section clamps with card cable (4).Starting stage U shape steel bracket overlap joint section can contract and allow pressure.The overlap joint section of setting can contract after quantitative change shape finishes, and the end of following shaped steel (2) withstands on anti-skid (3) of having welded on the shaped steel (1), refuses to contract, becomes and be rigidly connected.At this moment, shaped steel (2) end withstands on the skid resistance and card cable (4) the clamping back that are subjected on anti-skid (3) and realizes that at the stiction between shaped steel, between shaped steel card cable support overlaps a section rigidity and can not contract under the U shape steel bracket overlap joint section connecting portion dependence overlapping part.
In Fig. 2, in anti-skid (3) of welding, the place ahead that the following shaped steel (2) of U shape steel bracket overlap joint is gone up shaped steel (1) end 0～1200mm certain distance on the overlap joint section overlap length position, this distance can the amount of contracting for the overlap joint section of qualification; Contoured surface is close in the U type of anti-skid (3) and following shaped steel (2), and anti-skid (3) are welded on the following shaped steel (2) of overlap joint section.Behind the two shaped steel overlap joint, the overlap joint section clamps with card cable (4).Starting stage U shape steel bracket overlap joint section can contract and allow pressure.The overlap joint section of setting can contract after quantitative change shape finishes, and the end of last shaped steel (1) withstands on down on anti-skid (3) of having welded on the shaped steel (2), refuses to contract, becomes and be rigidly connected.At this moment, last shaped steel (1) end of U shape steel bracket overlap joint section connecting portion dependence overlapping part withstands on the skid resistance and card cable (4) the clamping back that are subjected on anti-skid (3) and realizes that at the stiction between shaped steel, between shaped steel card cable support overlaps a section rigidity and can not contract.
Claims (3)
1. the U shape steel bracket of changing between rigidity that can contract overlaps segment connecting method, it is characterized in that: on a shaped steel of U shape steel bracket overlap joint, weld anti-skid apart from the place ahead of another shaped steel end 0～1200mm certain distance of overlap joint section overlap length position, this distance can the amount of contracting for the overlap joint section set, after two shaped steel overlap joint section uses the card cable clip tight, initial stage U shape steel bracket overlap joint section can contract and allow pressure, the overlap joint section of setting can contract after quantitative change shape finishes, the end of another shaped steel withstands on anti-skid that has welded on this shaped steel, refuses to contract, and becomes to be rigidly connected.
2. the U shape steel bracket overlap joint segment connecting method that contracts and change between rigidity according to claim 1 is characterized in that: be welded on the shaped steel anti-skid block-shaped for and the U-shaped of U sectional shape contour shape basically identical; Be close to U shaped steel outer surface, the welding of interior contoured surface for anti-skid.
3. the U shape steel bracket overlap joint segment connecting method that contracts and change between rigidity according to claim 1, it is characterized in that: anti-skid block welding is on a shaped steel of overlap joint section.
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 |
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| Publication Number | Publication Date |
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| CN101245707A true CN101245707A (en) | 2008-08-20 |
| CN101245707B CN101245707B (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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Cited By (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 |
| CN105386780A (en) * | 2015-11-26 | 2016-03-09 | 赵西方 | Rock burst prevention steel structural part roadway support shrinkage structure |
| CN105422145A (en) * | 2015-12-30 | 2016-03-23 | 辽宁工程技术大学 | U-steel yieldable support with resistance increase and energy absorption functions |
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 |
Cited By (6)
| 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 |
| CN105386780A (en) * | 2015-11-26 | 2016-03-09 | 赵西方 | Rock burst prevention steel structural part roadway support shrinkage structure |
| CN105386780B (en) * | 2015-11-26 | 2018-02-27 | 赵西方 | Protecting against shock compressed steel structural member excavation support can shrinking structure |
| CN105422145A (en) * | 2015-12-30 | 2016-03-23 | 辽宁工程技术大学 | U-steel yieldable support with resistance increase and energy absorption functions |
| 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 |
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| CN101245707B (en) | 2014-10-22 |
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Granted publication date: 20141022 Termination date: 20170124 |