CN105088961B - The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment - Google Patents
The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment Download PDFInfo
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- CN105088961B CN105088961B CN201510569085.XA CN201510569085A CN105088961B CN 105088961 B CN105088961 B CN 105088961B CN 201510569085 A CN201510569085 A CN 201510569085A CN 105088961 B CN105088961 B CN 105088961B
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- wavelike steel
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Abstract
The invention discloses the construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment, comprises the steps：The construction that end bay closes up front N Wavelike steel webplates sections is completed using cradle construction；Abutment pier bent cap support and closure segment support are set up on pier cushion cap is received, and the Hanging Basket bottom basket on N Wavelike steel webplate sections is moved forward to closure segment support, so that Hanging Basket bottom basket merges into an integral support platform with closure segment support and abutment pier bent cap support；Piecemeal installs the Wavelike steel webplate on closure segment；Reinforcing bar and prestress pipe are installed on integral support platform；In selecting one day, range of temperature is minimum and concreting after period for rising of temperature, while carrying out the concreting of closure segment and abutment pier bent cap top section；After closing up section concrete and reaching design strength, stretch-draw prestressing force completes end bay and closes up.It is an advantage of the invention that using disposably closing up, the time closed up by whole end bay, shortening more than two weeks, time and construction cost is reduced.
Description
Technical field
The invention belongs to technical field of bridge engineering, and in particular to a kind of Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs end bay closure segment with
The construction method that Cast-in-Situ Segment merges.
Background technology
Wavelike steel webplate PC box beams are formed by connecting by some pieces of Wavelike steel webplates by concrete roof and floor.China is to waveform
The research of steel web PC box girder bridges starts from the nineties in 20th century, has built up more than 30 seat Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs, with
Little across footpath is in the majority.In recent years, Wavelike steel webplate PC box beams start to apply to large-span continuous girder bridges and cable-stayed bridge, frequently with Hanging Basket
Cantilever Construction Method, last one procedure of its end bay closure segment construction as Hanging Basket cantilever construction, and one of most critical
Operation, is directly connected to girder linearly and bridge entirety stress.
Therefore, how to ensure under safe precondition, quickly, economically realize end bay closure, become art technology
Personnel's problem demanding prompt solution.
Content of the invention
The purpose of the present invention be according to above-mentioned the deficiencies in the prior art in place of, there is provided a kind of end bay closure segment and Cast-in-Situ Segment are closed
And construction method, the construction method by using the side section on closure segment and abutment pier bent cap while carry out so that end bay closes up
Once carry out.
The object of the invention is realized being completed by technical scheme below：
The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment, it is characterised in that the construction method includes following step
Suddenly：The construction that end bay closes up front N Wavelike steel webplates sections is completed using cradle construction；Abutment pier lid is set up on pier cushion cap is received
Boom support and closure segment support, and the Hanging Basket bottom basket on the N Wavelike steel webplates sections is moved forward to the closure segment
Frame, so that Hanging Basket bottom basket merges into an integral support platform with the closure segment support and the abutment pier bent cap support；
Piecemeal installs the Wavelike steel webplate on the closure segment；Reinforcing bar and prestress pipe are installed on the integral support platform；
In selecting one day, range of temperature is minimum and concreting after period for rising of temperature, while carrying out the closure segment and institute
State the concreting of abutment pier bent cap top section；Close up described in after section concrete reaches design strength, stretch-draw prestressing force is completed
End bay closes up.
Piecemeal installs the method for the Wavelike steel webplate on the closure segment：The Wavelike steel webplate is welded after being adjusted in place
Upper and lower wing plate seam, one end of the Wavelike steel webplate with the N Wavelike steel webplates sections end carry out longitudinally connected,
Described longitudinally connected connect for fillet weld and bolt connection；The other end of the Wavelike steel webplate is free end.
The Hanging Basket bottom basket front end is fixedly connected with the closure segment support.
The reinforcing bar in the closure segment institute connected in the N Wavelike steel webplates sections corresponding with prestress pipe
State reinforcing bar and prestress pipe.
It is an advantage of the invention that（1）End bay closure section adopts " latch-up-free device ", not only safe and reliable but also economical and practical；（2）
All closure segment supports are set up and substantially as powerful foundation and can hang blue bottom basket work by the use of the cushion cap for receiving pier
For platform, the possibility of the permanent structure deformation caused because of settlement of foundation is eliminated；（3）Due to the use of latch-up-free device, can
So that because hanging the structure applied of Fructus polygoni tinctorii with the transition ratio for receiving pier smoothly, line style transition in this place is ideal；（4）Due to being
Disposably close up, the time closed up by whole end bay, shorten about more than two weeks, reduce time and construction cost.
Description of the drawings
Fig. 1 is end bay closure construction schematic diagram in the present invention.
Specific embodiment
Feature of the invention and other correlated characteristics is described in further detail by embodiment below in conjunction with accompanying drawing, with
It is easy to the understanding of technical staff of the same trade：
Such as Fig. 1, in figure, labelling 1-10 is respectively：Hanging Basket 1, N Wavelike steel webplates sections 2, abutment pier bent cap support 3, Hanging Basket
Bottom basket 4, integral support platform 5, closure segment support 6, bent cap 7, reception pier 8, closure segment 9, side section 10.
Embodiment：As shown in figure 1, the present embodiment is specifically related to a kind of Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs end bay closure segment and shows
The construction method of section merging is poured, following steps are specifically included：
（1）The girder of Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs is being combined for tower beam to N+1 sections, No. 0 sections is divided into along bridge
Section, 1～N Wavelike steel webplates sections be standard sections, the construction that end bay closes up front all sections is completed by Hanging Basket 1, i.e., according to
Secondary No. 0 Wavelike steel webplate sections, No. 1 Wavelike steel webplate sections ... of completing is until N Wavelike steel webplates sections 2, regulation is closed up
The N Wavelike steel webplates sections 2 of 9 sides of section is to designed elevation；
（2）Installation closure segment support 6 is set up on the cushion cap for receiving pier 8, and sets up installation abutment pier bent cap on bent cap 7
Frame 3；Afterwards Hanging Basket bottom basket 4 is moved forward on closure segment support 6, both are fixedly connected, be fixedly connected can be welding or
Bolt connection, so that Hanging Basket bottom basket 4 is connected and composed as an integral support platform with closure segment support 6 and abutment pier bent cap support 3
5, improve the integrated support ability of three；It should be noted that closure segment support 6, abutment pier bent cap support 3 and Hanging Basket bottom basket 4
Top surface be installed on same level height；
（3）Piecemeal installs Wavelike steel webplate at the closure segment 9, and after being adjusted in place, the upper and lower wing plate of welding Wavelike steel webplate connects
Seam, meanwhile, each Wavelike steel webplate one end in closure segment 9 is carried out with N Wavelike steel webplates segment end longitudinally connected, indulge
Connect to connected mode using fillet weld and high strength exploitation；And the other end of Wavelike steel webplate is then for freely in closure segment 9
End, does not weld；
（4）Bed die, reinforcing bar and the prestress pipe of closure segment 9 and side section 10 is respectively mounted on integral support platform 5,
Reinforcing bar and prestress pipe wherein in closure segment 9 be N Wavelike steel webplates sections 2 in steel-bar and stress technique pipeline connection and
Extend；
（5）In selecting one day, range of temperature is minimum and concreting after period for rising of temperature, while being closed
Hold together the concreting of section 9 and side section 10；
（6）After the concrete of closure segment 9 reaches design strength, all kinds of prestressing force of timely tensioning closure segment 9（That is tensioning
Prestress pipe）So as to become one of permanent part of closure segment 9, herein the design strength of indication specifically refer to concrete strength and
Elastic modelling quantity reaches design requirement, and the end bay for being finally completed Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs closes up.
In the present embodiment end bay closure work progress, by closure segment is constructed with the side section on bent cap simultaneously,
Avoid traditional implement construction of cast-in-place box girders section in bent cap Duan Shangxian, the traditional method that then closes up with which again makes end bay close up one
Secondary carry out, greatly shorten the duration, reduce and set up caused by support because implementing in advance side section concrete cast on bent cap
High basement process expense.
Claims (4)
1. the construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment, it is characterised in that the construction method includes following step
Suddenly：The construction that end bay closes up front N Wavelike steel webplates sections is completed using cradle construction；Abutment pier lid is set up on pier cushion cap is received
Boom support and closure segment support, and the Hanging Basket bottom basket on the N Wavelike steel webplates sections is moved forward to the closure segment
Frame, so that Hanging Basket bottom basket merges into an integral support platform with the closure segment support and the abutment pier bent cap support；
Piecemeal installs the Wavelike steel webplate on the closure segment；Reinforcing bar and prestress pipe are installed on the integral support platform；
In selecting one day, range of temperature is minimum and concreting after period for rising of temperature, while carrying out the closure segment and institute
State the concreting of abutment pier bent cap top section；Close up described in after section concrete reaches design strength, stretch-draw prestressing force is completed
End bay closes up.
2. the construction method that a kind of end bay closure segment according to claim 1 is merged with Cast-in-Situ Segment, it is characterised in that piecemeal
The method for installing the Wavelike steel webplate on the closure segment is：Weld the upper and lower wing plate of the Wavelike steel webplate to connect after being adjusted in place
Seam, one end of the Wavelike steel webplate with the N Wavelike steel webplates sections end carry out longitudinally connected, described longitudinally connected
Connect for fillet weld and bolt connection；The other end of the Wavelike steel webplate is free end.
3. the construction method that a kind of end bay closure segment according to claim 1 is merged with Cast-in-Situ Segment, it is characterised in that described
Hanging Basket bottom basket front end is fixedly connected with the closure segment support.
4. the construction method that a kind of end bay closure segment according to claim 1 is merged with Cast-in-Situ Segment, it is characterised in that described
The reinforcing bar in the closure segment reinforcing bar connected in the N Wavelike steel webplates sections corresponding with prestress pipe and in advance should
Hydraulic piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510569085.XA CN105088961B (en) | 2015-09-09 | 2015-09-09 | The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510569085.XA CN105088961B (en) | 2015-09-09 | 2015-09-09 | The construction method that a kind of end bay closure segment is merged with Cast-in-Situ Segment |
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| Publication Number | Publication Date |
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| CN105088961A CN105088961A (en) | 2015-11-25 |
| CN105088961B true CN105088961B (en) | 2017-03-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702910B (en) * | 2016-12-29 | 2018-10-19 | 中交第三航务工程局有限公司 | A kind of main girder construction technique of the double rope face low-pylon cable-stayed bridges of double tower |
| CN109736206B (en) * | 2019-01-28 | 2023-11-28 | 宁波交通工程建设集团有限公司 | Cast-in-situ bracket structure for bridge side span closure of corrugated steel web continuous beam and construction method |
| 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 |
| CN111926720B (en) * | 2020-08-12 | 2022-01-25 | 中建七局交通建设有限公司 | Construction method suitable for continuous steel-structure cantilever beam closure in loess area |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047234A (en) * | 2014-04-02 | 2014-09-17 | 中铁二院工程集团有限责任公司 | Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge |
-
2015
- 2015-09-09 CN CN201510569085.XA patent/CN105088961B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047234A (en) * | 2014-04-02 | 2014-09-17 | 中铁二院工程集团有限责任公司 | Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge |
Non-Patent Citations (2)
| Title |
|---|
| 悬臂施工波形钢腹板组合梁桥施工工艺;曾强 等;《中国工程科学》;20130815;全文 * |
| 黄河大桥大跨波形钢腹板PC连续梁桥合龙施工技术;张秋祥;《铁道建筑技术》;20140520(第5期);1页右栏第二段至第4页右栏第二段 * |
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| CN105088961A (en) | 2015-11-25 |
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