CN104047234A - Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge - Google Patents
Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge Download PDFInfo
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- CN104047234A CN104047234A CN201410134116.4A CN201410134116A CN104047234A CN 104047234 A CN104047234 A CN 104047234A CN 201410134116 A CN201410134116 A CN 201410134116A CN 104047234 A CN104047234 A CN 104047234A
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Abstract
The invention provides a self load bearing side span closure construction method for a corrugated steel web plate continuous rigid frame bridge. The method aims at safely, economically and fast realizing the side span closure when a support frame cannot be adopted for construction on a high-side-pier corrugated steel web plate continuous rigid frame bridge. The method comprises the following steps that (1) hanging basket construction is adopted on the top of a middle pier for completing a cantilever perfusion beam section for forming a T-shaped structure, and in addition, support frame cast-in-place concrete construction is adopted on the pier top of a side pier for completing end cross beams; (2) wing edge steel plates of corrugated steel web plates of a side span cast-in-plate beam section and a side span cast-in-place closure section are subjected to local transformation for forming a steel web plate self load bearing framework; (3) the steel web plate self load bearing framework is hung; (4) a mold is erected on the steel web plate self load bearing framework, and top plate and bottom plate concrete of the side span cast-in-place beam section is cast; (5) top plate and bottom plate concrete of the side span cast-in-place closure section is cast on the steel web plate self load bearing framework; (6) a prestress steel beam passing through the side span closure section is tensioned for completing the side span closure.
Description
Technical field
The present invention relates to bridge, particularly a kind of Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method.
Background technology
In large span continuous rigid frame bridge construction, generally adopt hanging basket cantilever construction technique, general Support Method or the interim hanging basket method of adopting of its end bay closure construction.
Support Method is first to set up full framing, support after precompressed, thereby then build and complete end bay closure construction at the enterprising cross girders body of support.This engineering method is only applicable to the shorter situation of abutment pier (generally lower than 30m), and setting up support and complete precompressed need to approximately 10 day time, and can produce temporary construction measure costs such as setting up support.
Interim hanging basket method is applicable to the bridge that abutment pier is higher.Taking the large span continuous rigid frame bridge of high abutment pier as example, concrete construction method is: first symmetrical construction T structure and according to construction weight the abutment pier through strengthening processing, and carry out midspan closing; Outstanding pouring built T structure and kept to the side across the unsymmetrical beam section of side again, at the other end of T structure, balance weight is installed simultaneously; Next the interim hanging beam of end bay closure section is installed, and locking formation rigidly connects temporarily; On hanging beam, build termination Cast-in-Situ Segment and closure section concrete, stretch-draw, through the prestressed strand of end bay closure section, completes end bay closure; The complete interim hanging beam and being rigidly connected removed again joins the two sections of a bridge, etc.
It is 9 days that the single unsymmetrical beam section of the outstanding filling construction of the method need to spend the standard time.Asymmetric outstanding filling has been constructed also needs to install, removes interim hanging beam after beam body, the temporary construction measure such as rigidly connect temporarily, and then can spend again approximately 25 day time.And installing, remove interim hanging beam, have a large amount of work high above the ground while rigidly connecting temporarily, construction risk is large.Because abutment pier bears larger eccentric load, its Rigidity and strength needs to strengthen, simultaneously in across also needing to carry out counterweight operation.Above-mentioned temporary measure all can produce a large amount of working measure expenses, will certainly increase investment.
There is higher construction risk in traditional high pier continuous rigid frame bridge end bay closure method, consume simultaneously long in time limit, engineering measure expense is high.Particularly, when bridge span is larger, adopt the risk of traditional interim nacelle construction can be larger, the duration can be longer, and expense also can be higher.Therefore, create a kind of novel construction method significant.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method, with in the time that high abutment pier Wavelike steel webplate continuous rigid frame bridge cannot adopt rack construction, safely, economically and quickly realizes end bay closure.
The technical solution adopted for the present invention to solve the technical problems is as follows:
1. Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method of the present invention, comprise the steps: to adopt at Zhong Dun top cradle construction to complete the outstanding beam section of filling with and form T structure, and adopt the support cast-in-place end floor beam of having constructed at abutment pier Dun Ding; 2. the edge of a wing steel plate of the Wavelike steel webplate to end bay Cast-in-situ Beam section, the cast-in-place closure section of end bay carries out local flow improvement, and between twice steel web, fixedly mounts diagonal brace leverage formation steel web self-supporting skeleton; 3. lift steel web self-supporting skeleton, these self-supporting skeleton two ends are fixedly connected with the outstanding beam section of filling with end floor beam respectively; 4. shut die on steel web self-supporting skeleton, builds end bay Cast-in-situ Beam section top board and underplate concrete; 5. on steel web self-supporting skeleton, build the cast-in-place closure section top board of end bay and underplate concrete; 6. stretch-draw completes end bay closure through the prestressed strand of end bay closure section.
The invention has the beneficial effects as follows, the temporary construction measure such as do not need the interim hanging beam of installation and removal, rigidly connect, has shortened the construction period, has reduced the time of work high above the ground, has reduced the risk of work high above the ground, can effectively save construction costs.
Brief description of the drawings
This manual comprises following four width accompanying drawings:
Fig. 1 is the legend of Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method of the present invention;
Fig. 2 is the plan view that Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method of the present invention adopts steel web frame member;
Fig. 3 is the profile of the steel web self-supporting skeleton that adopts in Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method of the present invention;
Fig. 4 is the construction legend of existing interim hanging basket method.
Member shown in figure and corresponding mark: middle pier 10, outstanding beam section 11, abutment pier 20, termination Cast-in-situ Beam section 21, end bay closure section 22, temporary supporting bracket 23, interim hanging beam 24, end floor beam 30, end bay Cast-in-situ Beam section 31, the cast-in-place closure section 32 of end bay, Wavelike steel webplate 40, edge of a wing steel plate 41, diagonal brace leverage 42, top board 43, the top, the end 44 of filling with.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 4 is the construction legend of existing interim hanging basket method, and its concrete construction method is: first symmetrical construction T structure (the outstanding filling beam section 11 on middle Dun10Dun top), and the abutment pier 20 of processing through reinforcement according to construction weight, and carry out midspan closing; Outstanding pouring built T structure and kept to the side across the unsymmetrical beam section of side again, at the other end of T structure, balance weight is installed simultaneously; On abutment pier 20, set up again temporary supporting bracket 23; Next the interim hanging beam 24 of end bay closure section is installed again, and locking formation rigidly connects temporarily; On interim hanging beam 24, build, termination Cast-in-situ Beam section 21 and closure section 22, after the prestressed strand of stretch-draw through closure section, complete end bay closure; Join the two sections of a bridge, etc and completely remove again temporary supporting bracket 23, interim hanging beam 24 and be rigidly connected.
With reference to Fig. 1, Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method of the present invention, comprises the steps:
1. adopt cradle constructions to complete the outstanding beam section 11 of filling with at middle pier 10 tops and form T structure, and adopt the support cast-in-places end floor beam 30 of having constructed at abutment pier 20 Dun Ding;
2. the edge of a wing steel plate 41 of the Wavelike steel webplate 40 to end bay Cast-in-situ Beam section 31, the cast-in-place closure section 32 of end bay carries out local flow improvement, widen thickening, can meet the force request of construction period, and between twice steel web 40, fixedly mount diagonal brace leverage 42 and form steel web self-supporting skeleton;
3. lift steel web self-supporting skeleton, these self-supporting skeleton two ends are fixedly connected with the outstanding beam section 11 of filling with end floor beam 30 respectively;
4. shut die on steel web self-supporting skeleton, builds end bay Cast-in-situ Beam section 31 top boards and underplate concrete;
5. on steel web self-supporting skeleton, build cast-in-place closure section 32 top boards of end bay and underplate concrete;
6. stretch-draw completes end bay closure through the prestressed strand of end bay closure section.
With reference to Fig. 2 and Fig. 3, described steel web self-supporting skeleton comprises both sides Wavelike steel webplate 40 and is fixed as the diagonal brace leverage 42 of stiffening member, the edge of a wing steel plate 41 that Wavelike steel webplate 40 upper and lower sides are welded to connect, the two ends of diagonal brace leverage 42 are connected by gusset plate with edge of a wing steel plate 41.
The present invention has that structure stress is clear and definite, safe and reliable, easy construction, and can significantly reduce the feature of cost, and applicant successfully applies to it in design and construction of the little sand furrow bridge in eastern section, Beihuan road, Lanzhou.This bridge superstructure adopts (57+2 × 100+57) m Wavelike steel webplate continuous rigid frame, and its 2# end bay pier is up to 50m, and this end bay closure section adopts method of the present invention to construct.
Before construction, end bay closure section steel web having been carried out to local transformation, is 32mm by the upper and lower edge of a wing steel plate thickness of this section of steel web by the 24mm thickening of standard paragraphs, and width is widened as 520mm by the 460mm of standard paragraphs, can bear the bending resistance requirement of construction period; And diagonal brace leverage formation steel web self-supporting skeleton is installed between twice Wavelike steel webplate, can meet the requirement of construction period strength and stability.
Compared with adopting traditional interim hanging basket method, reduce the reinforcement measure of abutment pier, avoid setting up, removed temporary supporting bracket, interim hanging beam and rigidly connected carried out work high above the ground, reduce 30 days senior engineer's activity durations, reduce construction risk; Economic benefit aspect compares by calculating, and full-bridge (left and right width total) has been saved 34 days durations altogether, has saved steel 220t, and abutment pier has reduced concrete 140m
3, reduce reinforcing bar 92t, also reduced the counterweight operation of 380t high-altitude simultaneously.By tentative calculation, when main span increases to 200m, when abutment pier height is 50m, full-bridge (left and right width total) will be saved 48 days durations (wherein will reduce 42 days senior engineer's activity durations) altogether, to save steel 520t, abutment pier will reduce concrete 210m3, reduce reinforcing bar 138t, also will reduce the counterweight operation of 754t high-altitude simultaneously.
Some principles and the step of the above Wavelike steel webplate continuous rigid frame bridge steel web self-supporting end bay closure construction method of the present invention that just explains through diagrams, be not the present invention to be confined to shown in and in described concrete structure and the scope of application, therefore the corresponding modify being likely utilized every and equivalent, all belong to the scope of the claims that the present invention applies for.
Claims (2)
1. Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method, comprises the steps:
1. adopt cradle construction to complete the outstanding beam section (11) of filling with at Zhong Dun (10) top and form T structure, and adopt the support cast-in-place end floor beam (30) of having constructed at abutment pier (20) Dun Ding;
2. the edge of a wing steel plate (41) of the Wavelike steel webplate (40) to end bay Cast-in-situ Beam section (31), the cast-in-place closure section of end bay (32) carries out local flow improvement, and between twice steel web (40), fixedly mounts diagonal brace leverage (42) formation steel web self-supporting skeleton;
3. lift steel web self-supporting skeleton, these self-supporting skeleton two ends are fixedly connected with the outstanding beam section (11) of filling with end floor beam (30) respectively;
4. shut die on steel web self-supporting skeleton, builds end bay Cast-in-situ Beam section (31) top board and underplate concrete;
5. on steel web self-supporting skeleton, build cast-in-place closure section (32) top board of end bay and underplate concrete;
6. stretch-draw completes end bay closure through the prestressed strand of end bay closure section.
2. Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method as claimed in claim 1, it is characterized in that: described steel web self-supporting skeleton comprises both sides Wavelike steel webplate (40) and is fixed as the diagonal brace leverage (42) of stiffening member, the vertical two ends of Wavelike steel webplate (40) arrange edge of a wing steel plate (41) by being welded and fixed, the two ends of diagonal brace leverage (42) and edge of a wing steel plate (41) welding.
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| CN201410134116.4A CN104047234B (en) | 2014-04-02 | 2014-04-02 | Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method |
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| CN201410134116.4A CN104047234B (en) | 2014-04-02 | 2014-04-02 | Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method |
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Cited By (6)
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| CN105088962A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Integrated hoisting method for corrugated steel web part |
| CN105088969A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Closure method for multi-tower single-cable-plane cable-stayed bridge |
| CN105088961A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Side-span closure section and cast-in-place section combining construction method |
| CN107386090A (en) * | 2017-06-09 | 2017-11-24 | 中铁二院工程集团有限责任公司 | The more chamber box girder with corrugated steel webs constructions of combined type |
| CN111455874A (en) * | 2020-04-26 | 2020-07-28 | 中国建筑第七工程局有限公司 | Construction method for overlong side span straight line segment of high pier of corrugated steel web PC bridge |
| CN111535205A (en) * | 2020-05-07 | 2020-08-14 | 浙江省交通运输科学研究院 | Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105088962A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Integrated hoisting method for corrugated steel web part |
| CN105088969A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Closure method for multi-tower single-cable-plane cable-stayed bridge |
| CN105088961A (en) * | 2015-09-09 | 2015-11-25 | 上海城建市政工程（集团）有限公司 | Side-span closure section and cast-in-place section combining construction method |
| CN105088961B (en) * | 2015-09-09 | 2017-03-15 | 上海城建市政工程（集团）有限公司 | The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment |
| CN107386090A (en) * | 2017-06-09 | 2017-11-24 | 中铁二院工程集团有限责任公司 | The more chamber box girder with corrugated steel webs constructions of combined type |
| CN111455874A (en) * | 2020-04-26 | 2020-07-28 | 中国建筑第七工程局有限公司 | Construction method for overlong side span straight line segment of high pier of corrugated steel web PC bridge |
| CN111455874B (en) * | 2020-04-26 | 2022-05-24 | 中国建筑第七工程局有限公司 | Construction method for high-pier overlong side span straight-line segment of corrugated steel web PC bridge |
| CN111535205A (en) * | 2020-05-07 | 2020-08-14 | 浙江省交通运输科学研究院 | Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate |
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| CN104047234B (en) | 2016-05-11 |
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