CN102041782A - Multi-point pushing system of large-span steel truss girders and pushing process thereof - Google Patents
Multi-point pushing system of large-span steel truss girders and pushing process thereof Download PDFInfo
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- CN102041782A CN102041782A CN 201010581988 CN201010581988A CN102041782A CN 102041782 A CN102041782 A CN 102041782A CN 201010581988 CN201010581988 CN 201010581988 CN 201010581988 A CN201010581988 A CN 201010581988A CN 102041782 A CN102041782 A CN 102041782A
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Abstract
The invention discloses a multi-point pushing mechanism of large-span steel truss girders and a pushing process thereof. The multi-point pushing mechanism comprises six sets of pushing systems and auxiliary dragging mechanisms, wherein the six sets of pushing systems are respectively arranged at the bottoms of two steel truss girders, and the auxiliary dragging mechanisms are arranged at the bottoms of lower chords of the steel truss girders; and the main pushing system is provided with two main longitudinal slide-ways which are supported on temporary support slide-way beams. By using the multi-point pushing mechanism provided by the invention, the steel truss girders comprising at least two main trusses are stressed definitely in pushing construction, thereby the pushing quality of the steel truss girders is ensured.
Description
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Technical field
The present invention relates to large-span steel trusses multi-point pushing system and pushing tow technology, the pushing tow system and the pushing tow technology of more specifically saying so and being adopted when the incremental launching construction at the large-span steel trusses.
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Background technology
In the steel bridge construction, the large-span steel trusses often adopts the construction of multiple spot successively incremeantal launching method, finally finishes the installation of steel truss girder by the dilatory steel truss girder of jacking jack.
Present steel truss girder top-pushing mechanism all is that the quantity according to main truss in the steel truss girder design section is set to two above pushing tow slideways and does not have the pushing tow stopping means and vertical absolute altitude adjusting device.But, in some steel truss girder incremental launching constructions, steel truss girder design span is bigger, if the pushing tow system is provided with single-point thrustor and infinite place device and vertical absolute altitude adjusting device, so both influenced the stressed of steel truss girder, and reduced efficiency of construction and also can't satisfy the requirement that is designed to bridge simultaneously.
Such as, loop wire Economic Development Zone, south, Hefei and southern Fei river in Anhui Province steel truss girder flexible arch bridge, its main bridge steel truss girder is two main trusses, adopts incremental launching construction, if adopt the top-pushing mechanism of single-point pushing tow slideway and infinite place device and vertical absolute altitude adjusting device, then be difficult to guarantee the stressed good of steel truss girder.At this multi-point pushing system pushing tow, can adjust the steel truss girder absolute altitude and in the pushing tow process, steel truss girder be carried out spacing top-pushing mechanism, also relevant open report in the prior art.
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Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of large-span steel trusses multi-point pushing mechanism and pushing tow technology thereof are provided, make the steel truss girder with two and above main truss in incremental launching construction, steel truss girder is stressed clear and definite, guarantees steel truss girder pushing tow quality.
Technical solution problem of the present invention adopts following technical scheme:
A kind of large-span steel trusses multi-point pushing system, the multi-point pushing system is made up of with the auxiliary traction mechanism that is positioned at steel truss girder lower chord bottom the main pushing tow of the six covers systems that lay respectively at two Pin steel truss girders bottom, main pushing tow system has two vertical main skids, described vertical main skid is bearing on the falsework slipway beam, the jacking jack is fixedly installed on the falsework slipway beam, main drag cable one end is connected in described jacking jack, and the other end is connected in the lower chord bottom of each sections steel truss girder by the counter-force seat; At the top of described falsework slipway beam the top is set and lifts jack and MGB plate slide block, be used to regulate the bearing height of falsework slipway beam; Described auxiliary traction mechanism is provided with the counter-force seat for two Pin steel truss girder lower chords respectively by both sides falsework platform, in the bottom of described steel truss girder lower chord the auxiliary traction rope is set; The spacing jack of horizontal correction is set in the steel truss girder both sides.
Be provided with corrosion resistant plate at described vertical main skid end face.
A kind of large-span steel trusses multi-point pushing process, operation as follows:
Jack is lifted on step a, jacking top, and places MGB plate slide block at the end face of corrosion resistant plate, makes steel truss girder be adjusted at the absolute altitude of design;
Step b, connect jacking jack and counter-force seat, start the jacking jack and begin pushing tow by main drag cable; In the process of pushing tow,, and correct the sideslip of steel truss girder in the pushing tow process with the position of the spacing jack maintenance of the horizontal correction in both sides steel truss girder;
When the traction of step c, the counter-force seat on this sections steel truss girder puts in place, remove the counter-force seat and be installed on the base plate of steel truss girder lower chord of next sections repeating step a and step b.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the steel truss girder structure that the present invention is directed to two and above main truss is provided with the vertical main skid of twice, makes steel truss girder stressed clear and definite, simple to operate in the pushing tow process.
2, the MGB plate slide block among the present invention can accurately be adjusted steel case beam in design elevation, guarantees linear the meeting design requirement of one-tenth bridge of full-bridge.
Plan-position when 3, the present invention is provided with the spacing jack of horizontal correction and auxiliary traction rope and can be good at controlling the steel truss girder pushing tow is guaranteed into the bridge quality and is satisfied code requirement.
4, the multiple function synthesized of the present invention has been saved cost to greatest extent, has been simplified construction.
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Description of drawings
Fig. 1 is spacing jack layout schematic diagram for the present invention laterally rectifies a deviation;
Fig. 2 arranges schematic diagram for the vertical hydraulic jack of the present invention;
Fig. 3 arranges schematic diagram for level jin of the present invention top counter-force seat.
The specific embodiment
Referring to accompanying drawing, a kind of large-span steel trusses multi-point pushing system, the multi-point pushing system is made up of with the auxiliary traction mechanism that is positioned at steel truss girder lower chord bottom the main pushing tow of the six covers systems that lay respectively at two Pin steel truss girders bottom, main pushing tow system has two vertical main skids, described vertical main skid is bearing on the falsework slipway beam, jacking jack 2 is fixedly installed on the falsework slipway beam, main drag cable one end is connected in the jacking jack, and the other end is connected in the lower chord bottom of each sections steel truss girder by counter-force seat 3; At the top of described falsework slipway beam the top is set and lifts jack and MGB plate slide block, be used to regulate the bearing height of falsework slipway beam; Described auxiliary traction mechanism is provided with the counter-force seat for two Pin steel truss girder lower chords respectively by both sides falsework platform, in the bottom of described steel truss girder lower chord the auxiliary traction rope is set; The spacing jack 1 of horizontal correction is set in the steel truss girder both sides, is provided with corrosion resistant plate at vertical main skid end face.
A kind of large-span steel trusses multi-point pushing process, operation as follows:
Jack is lifted on step a, jacking top, and places MGB plate slide block at the end face of corrosion resistant plate, makes steel truss girder be adjusted at the absolute altitude of design;
Step b, connect jacking jack and counter-force seat, start the jacking jack and begin pushing tow by main drag cable; In the process of pushing tow,, and correct the sideslip of steel truss girder in the pushing tow process with the position of the spacing jack maintenance of the horizontal correction in both sides steel truss girder;
When the traction of step c, the counter-force seat on this sections steel truss girder puts in place, remove the counter-force seat and be installed on the base plate of steel truss girder lower chord of next sections repeating step a and step b.
Claims (3)
1. large-span steel trusses multi-point pushing system, it is characterized in that: described multi-point pushing system is made up of six cover main pushing tow systems that lay respectively at two Pin steel truss girders bottom and the auxiliary traction mechanism that is positioned at steel truss girder lower chord bottom, main pushing tow system has two vertical main skids, described vertical main skid is bearing on the falsework slipway beam, the jacking jack is fixedly installed on the falsework slipway beam, main drag cable one end is connected in described jacking jack, and the other end is connected in the lower chord bottom of each sections steel truss girder by the counter-force seat; At the top of described falsework slipway beam the top is set and lifts jack and MGB plate slide block, be used to regulate the bearing height of falsework slipway beam; Described auxiliary traction mechanism is provided with the counter-force seat for two Pin steel truss girder lower chords respectively by both sides falsework platform, in the bottom of described steel truss girder lower chord the auxiliary traction rope is set; The spacing jack of horizontal correction is set in the steel truss girder both sides.
2. large-span steel trusses multi-point pushing according to claim 1 system is characterized in that: be provided with corrosion resistant plate at described vertical main skid end face.
3. the described large-span steel trusses of claim 1 multi-point pushing process is characterized in that operating as follows:
Jack is lifted on step a, jacking top, and places MGB plate slide block at the end face of corrosion resistant plate, makes steel truss girder be adjusted at the absolute altitude of design;
Step b, connect jacking jack and counter-force seat, start the jacking jack and begin pushing tow by main drag cable; In the process of pushing tow,, and correct the sideslip of steel truss girder in the pushing tow process with the position of the spacing jack maintenance of the horizontal correction in both sides steel truss girder;
When the traction of step c, the counter-force seat on this sections steel truss girder puts in place, remove the counter-force seat and be installed on the base plate of steel truss girder lower chord of next sections repeating step a and step b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010581988 CN102041782B (en) | 2010-12-10 | 2010-12-10 | Multi-point pushing system of large-span steel truss girders and pushing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010581988 CN102041782B (en) | 2010-12-10 | 2010-12-10 | Multi-point pushing system of large-span steel truss girders and pushing process thereof |
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| CN102041782A true CN102041782A (en) | 2011-05-04 |
| CN102041782B CN102041782B (en) | 2013-01-23 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373671A (en) * | 2011-11-18 | 2012-03-14 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
| CN102587281A (en) * | 2012-02-24 | 2012-07-18 | 中铁二十四局集团有限公司 | Walking type multi-point jacking-pushing construction method |
| CN103205935A (en) * | 2013-03-11 | 2013-07-17 | 中交武汉港湾工程设计研究院有限公司 | Automatic pushing system for modular steel truss and construction technology for automatic pushing system |
| CN103696374A (en) * | 2013-12-25 | 2014-04-02 | 中铁大桥勘测设计院集团有限公司 | Straddle method of cantilever of long-span simply supported steel truss beam of horizontal curve section |
| CN105201224A (en) * | 2015-10-12 | 2015-12-30 | 中铁四局集团钢结构有限公司 | Incremental launching construction lateral deviation control device |
| CN108035259A (en) * | 2017-12-11 | 2018-05-15 | 山东大学 | Unidirectional full cantilever steel truss arched bridge deviation correcting device and its application method |
| CN112482243A (en) * | 2020-12-08 | 2021-03-12 | 山东潍莱高速铁路有限公司 | Large cantilever steel truss transverse dragging construction fabricated deviation rectifying device and construction method |
| CN113622316A (en) * | 2021-08-24 | 2021-11-09 | 安徽省公路桥梁工程有限公司 | Steel truss girder multipoint traction type pushing construction system and construction method thereof |
| CN114232509A (en) * | 2021-12-20 | 2022-03-25 | 四川公路桥梁建设集团有限公司 | Transportation system and transportation method for bridge sections |
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| CN86201711U (en) * | 1986-03-22 | 1987-06-10 | 湖南省公路管理局 | Self-aligning shifting bearings for horizontal jack |
| DE3738291A1 (en) * | 1987-02-10 | 1988-09-22 | Dyckerhoff & Widmann Ag | Method for constructing a bridge supporting structure of prestressed concrete |
| CN101200959A (en) * | 2007-11-29 | 2008-06-18 | 北京城建集团有限责任公司 | Multi-point pushing cumulative-gliding construction method for steel roof truss |
| CN101761032A (en) * | 2009-12-31 | 2010-06-30 | 上海海珀联动力技术有限公司 | Jack-in erection equipment for bridge |
| CN201588175U (en) * | 2009-12-30 | 2010-09-22 | 长沙理工大学 | Pushing slide rail scale height regulation apparatus |
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2010
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| CN86201711U (en) * | 1986-03-22 | 1987-06-10 | 湖南省公路管理局 | Self-aligning shifting bearings for horizontal jack |
| DE3738291A1 (en) * | 1987-02-10 | 1988-09-22 | Dyckerhoff & Widmann Ag | Method for constructing a bridge supporting structure of prestressed concrete |
| CN101200959A (en) * | 2007-11-29 | 2008-06-18 | 北京城建集团有限责任公司 | Multi-point pushing cumulative-gliding construction method for steel roof truss |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373671A (en) * | 2011-11-18 | 2012-03-14 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
| CN102373671B (en) * | 2011-11-18 | 2013-08-07 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
| CN102587281A (en) * | 2012-02-24 | 2012-07-18 | 中铁二十四局集团有限公司 | Walking type multi-point jacking-pushing construction method |
| CN103205935A (en) * | 2013-03-11 | 2013-07-17 | 中交武汉港湾工程设计研究院有限公司 | Automatic pushing system for modular steel truss and construction technology for automatic pushing system |
| CN103205935B (en) * | 2013-03-11 | 2015-06-24 | 中交武汉港湾工程设计研究院有限公司 | Automatic pushing system for modular steel truss and construction technology for automatic pushing system |
| CN103696374A (en) * | 2013-12-25 | 2014-04-02 | 中铁大桥勘测设计院集团有限公司 | Straddle method of cantilever of long-span simply supported steel truss beam of horizontal curve section |
| CN103696374B (en) * | 2013-12-25 | 2015-10-28 | 中铁大桥勘测设计院集团有限公司 | Horizontal curve section is greatly across freely-supported steel trussed beam cantilever erection method |
| CN105201224A (en) * | 2015-10-12 | 2015-12-30 | 中铁四局集团钢结构有限公司 | Incremental launching construction lateral deviation control device |
| CN108035259A (en) * | 2017-12-11 | 2018-05-15 | 山东大学 | Unidirectional full cantilever steel truss arched bridge deviation correcting device and its application method |
| CN112482243A (en) * | 2020-12-08 | 2021-03-12 | 山东潍莱高速铁路有限公司 | Large cantilever steel truss transverse dragging construction fabricated deviation rectifying device and construction method |
| CN113622316A (en) * | 2021-08-24 | 2021-11-09 | 安徽省公路桥梁工程有限公司 | Steel truss girder multipoint traction type pushing construction system and construction method thereof |
| CN114232509A (en) * | 2021-12-20 | 2022-03-25 | 四川公路桥梁建设集团有限公司 | Transportation system and transportation method for bridge sections |
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Address after: 230000 No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee after: China Railway Fourth Bureau Group Steel Structure Construction Co.,Ltd. Address before: 230000 No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee before: Steel Structure Co., Ltd. of China Tiesiju Civil Engineering Group Address after: 230000 No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee after: STEEL STRUCTURE CO., LTD. OF CHINA TIESIJU CIVIL ENGINEERING Group Address before: 230000 No. 388 Huanhu East Road, Hefei City, Anhui Province Patentee before: Hefei Zhongtie Steel Structure Co.,Ltd. |
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