CN105088961A - Side-span closure section and cast-in-place section combining construction method - Google Patents
Side-span closure section and cast-in-place section combining construction method Download PDFInfo
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- CN105088961A CN105088961A CN201510569085.XA CN201510569085A CN105088961A CN 105088961 A CN105088961 A CN 105088961A CN 201510569085 A CN201510569085 A CN 201510569085A CN 105088961 A CN105088961 A CN 105088961A
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- closure segment
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Abstract
The invention discloses a side-span closure section and cast-in-place section combining construction method. The method includes the following steps that N corrugated steel web sections are constructed through hanging basket construction before side-span closure; a side pier cap beam support and a closure section support are erected on a receiving pier bearing platform, and hanging basket bottom baskets on the N corrugated steel web sections are moved forwards to the closure section support, so that the hanging basket bottom baskets are combined with the closure section support and the side pier cap beam support into an integrated support platform; corrugated steel webs on the closure section are installed one by one; steel ribs and pre-stress pipelines are installed on the integrated support platform; the time interval when the temperature change range is smallest and the temperature of concrete is raised after pouring in a day is selected, and meanwhile concrete of the closure section and the upper section of a side pier cap beam is poured; after the concrete of the closure section reaches the designed strength, pre-stress is tensioned, and side-span closure is completed. The method has the advantages that by the adoption of one-time closure, the overall side-span closure time is shortened by half a month, and time and construction cost are reduced.
Description
Technical field
The invention belongs to technical field of bridge engineering, be specifically related to the construction method that a kind of Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs end bay closure segment and Cast-in-Situ Segment merge.
Background technology
Wavelike steel webplate PC case beam is formed by connecting by some pieces of Wavelike steel webplates by concrete roof and floor.The research of China to Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs starts from the nineties in 20th century, and now built more than 30 seat Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs, in the majority with Mid and minor spans.In recent years, Wavelike steel webplate PC case beam starts to apply to large-span continuous girder bridges and cable stayed bridge, normal employing Hanging Basket Cantilever Construction Method, the construction of its end bay closure segment is as last procedure of Hanging Basket cantilever construction, also be a procedure of most critical, be directly connected to the linear and integral bridge stress of girder.
Therefore, under how ensureing safe precondition, realize end bay closure fast, economically, become those skilled in the art's problem demanding prompt solution.
Summary of the invention
The object of the invention is, according to above-mentioned the deficiencies in the prior art part, to provide the construction method that a kind of end bay closure segment and Cast-in-Situ Segment merge, this construction method is carried out by adopting the limit section on closure segment and abutment pier bent cap simultaneously, closes up once carry out to make end bay.
The object of the invention realizes being completed by following technical scheme:
The construction method that end bay closure segment and Cast-in-Situ Segment merge, is characterized in that described construction method comprises the steps: to adopt cradle construction to complete the construction that end bay closes up front N Wavelike steel webplate sections; Reception pier cushion cap sets up abutment pier bent cap support and closure segment support, and basket at the bottom of the Hanging Basket on described N Wavelike steel webplate sections is moved forward to described closure segment support, merge into an integral support platform to make basket at the bottom of described Hanging Basket with described closure segment support and described abutment pier bent cap support; Piecemeal installs the Wavelike steel webplate on described closure segment; Described integral support platform installs reinforcing bar and prestress pipe; Select range of temperature in a day minimum and the period that after concreting, temperature rises, carry out the concreting of described closure segment and described abutment pier bent cap top section simultaneously; After described closure segment concrete reaches design strength, stretch-draw prestressing force, completes end bay and closes up.
The method that piecemeal installs the Wavelike steel webplate on described closure segment is: weld the upper and lower wing plate seam of described Wavelike steel webplate after adjusting to the right place, longitudinal connection is carried out with the end of described N Wavelike steel webplate sections in one end of described Wavelike steel webplate, and described longitudinally connection is connected with bolt for fillet weld connects; The other end of described Wavelike steel webplate is free end.
Basket front end at the bottom of described Hanging Basket is fixedly connected with described closure segment support.
Described reinforcing bar in described closure segment and prestress pipe correspondence is connected described reinforcing bar in described N Wavelike steel webplate sections and prestress pipe.
Advantage of the present invention is, (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 the cushion cap of reception pier substantially can be utilized as powerful foundation and hang basket of the blue end as platform, eliminate the possibility of the permanent structure distortion caused because of foundation settlement; (3) due to the use of latch-up-free device, can make because hanging the blue structure implemented and receiving the transition of pier than smoothly, ideal in the line style transition at this place; (4) owing to being disposable closing up, to the time that whole end bay closes up, shorten about more than two weeks, reduce time and construction cost.
Accompanying drawing explanation
Fig. 1 is end bay closure construction schematic diagram in the present invention.
Detailed description of the invention
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technician of the same trade:
Be respectively as marked 1-10 in Fig. 1, figure: basket 4, integral support platform 5, closure segment support 6, bent cap 7, reception pier 8, closure segment 9, limit section 10 at the bottom of Hanging Basket 1, N Wavelike steel webplate sections 2, abutment pier bent cap support 3, Hanging Basket.
Embodiment: as shown in Figure 1, the present embodiment is specifically related to the construction method that a kind of Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs end bay closure segment and Cast-in-Situ Segment merge, and specifically comprises the steps:
(1) Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs girder along bridge to being divided into N+1 sections, No. 0 sections is tower beam adapter section, 1 ~ N Wavelike steel webplate sections is standard sections, the construction that end bay closes up front all sections is completed by Hanging Basket 1, namely No. 0 Wavelike steel webplate sections, No. 1 Wavelike steel webplate sections is completed successively ... until N Wavelike steel webplate sections 2, regulate N Wavelike steel webplate sections 2 to the design elevation of closure segment 9 side;
(2) on the cushion cap receiving pier 8, set up installation closure segment support 6, and on bent cap 7, set up mounting edge pier capping beam support 3; Afterwards basket at the bottom of Hanging Basket 4 is moved forward on closure segment support 6, both are fixed connection, being fixedly connected with can be that welding or bolt connect, and connecting and composing with closure segment support 6 and abutment pier bent cap support 3 to make basket 4 at the bottom of Hanging Basket is an integral support platform 5, improves the integrated support ability of three; It should be noted that, at the bottom of closure segment support 6, abutment pier bent cap support 3 and Hanging Basket, the end face of basket 4 is installed on same level height;
(3) punish block at closure segment 9 and Wavelike steel webplate is installed, the upper and lower wing plate seam of Wavelike steel webplate is welded after adjusting to the right place, simultaneously, longitudinal connection is carried out with N Wavelike steel webplate sections end in each Wavelike steel webplate one end in closure segment 9, and longitudinal connected mode adopts fillet weld to connect and high strength exploitation; In closure segment 9, the other end of Wavelike steel webplate is then free end, does not weld;
(4) on integral support platform 5, install the bed die of closure segment 9 and limit section 10, reinforcing bar and prestress pipe respectively, the reinforcing bar wherein in closure segment 9 and prestress pipe are connection and the extension of steel-bar and stress technique pipeline in N Wavelike steel webplate sections 2;
(5) select range of temperature in a day minimum and after concreting, temperature the rises period, carry out the concreting of closure segment 9 and limit section 10 simultaneously;
(6) after the concrete of closure segment 9 reaches design strength, all kinds of prestressing force (i.e. stretch-draw prestressing force pipeline) of timely stretch-draw closure segment 9, become one of permanent part of closure segment 9, the design strength of indication specifically refers to that concrete strength and modulus of elasticity reach designing requirement herein, and the end bay finally completing Prestressed Concrete Box-Girder Bridges with Corrugated Steel Webs closes up.
In the present embodiment end bay closure work progress, by the limit section on closure segment and bent cap is constructed simultaneously, avoid and traditional implement construction of cast-in-place box girders section at bent cap Duan Shangxian, and then the conventional method of to close up with it, end bay is closed up once carry out, shortening the duration greatly, decreasing the high basement process expense set up caused by support because implementing limit section concrete cast on bent cap in advance.
Claims (4)
1. the construction method that merges of end bay closure segment and Cast-in-Situ Segment, is characterized in that the construction that described construction method comprises the steps: to adopt cradle construction to complete end bay and closes up front N Wavelike steel webplate sections; Reception pier cushion cap sets up abutment pier bent cap support and closure segment support, and basket at the bottom of the Hanging Basket on described N Wavelike steel webplate sections is moved forward to described closure segment support, merge into an integral support platform to make basket at the bottom of described Hanging Basket with described closure segment support and described abutment pier bent cap support; Piecemeal installs the Wavelike steel webplate on described closure segment; Described integral support platform installs reinforcing bar and prestress pipe; Select range of temperature in a day minimum and the period that after concreting, temperature rises, carry out the concreting of described closure segment and described abutment pier bent cap top section simultaneously; After described closure segment concrete reaches design strength, stretch-draw prestressing force, completes end bay and closes up.
2. the construction method that merges of a kind of end bay closure segment according to claim 1 and Cast-in-Situ Segment, it is characterized in that the method that piecemeal installs the Wavelike steel webplate on described closure segment is: after adjusting to the right place, weld the upper and lower wing plate seam of described Wavelike steel webplate, longitudinal connection is carried out with the end of described N Wavelike steel webplate sections in one end of described Wavelike steel webplate, and described longitudinally connection is connected with bolt for fillet weld connects; The other end of described Wavelike steel webplate is free end.
3. the construction method that merges of a kind of end bay closure segment according to claim 1 and Cast-in-Situ Segment, is characterized in that basket front end at the bottom of described Hanging Basket is fixedly connected with described closure segment support.
4. the construction method that merges of a kind of end bay closure segment according to claim 1 and Cast-in-Situ Segment, the described reinforcing bar that it is characterized in that in described closure segment is connected described reinforcing bar in described N Wavelike steel webplate sections and prestress pipe with prestress pipe correspondence.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN105088961A true CN105088961A (en) | 2015-11-25 |
| CN105088961B CN105088961B (en) | 2017-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702910A (en) * | 2016-12-29 | 2017-05-24 | 中交第三航务工程局有限公司 | Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| 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 |
| CN111926720A (en) * | 2020-08-12 | 2020-11-13 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 张兴志: "《西南交通大学硕士学位论文》", 1 April 2009 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702910A (en) * | 2016-12-29 | 2017-05-24 | 中交第三航务工程局有限公司 | Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| 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 |
| 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 |
| CN111926720A (en) * | 2020-08-12 | 2020-11-13 | 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 |
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| CN105088961B (en) | 2017-03-15 |
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