CN105926443A - Construction method for continuous rigid frame side span by first girder installation and then closure - Google Patents
Construction method for continuous rigid frame side span by first girder installation and then closure Download PDFInfo
- Publication number
- CN105926443A CN105926443A CN201610254901.2A CN201610254901A CN105926443A CN 105926443 A CN105926443 A CN 105926443A CN 201610254901 A CN201610254901 A CN 201610254901A CN 105926443 A CN105926443 A CN 105926443A
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- China
- Prior art keywords
- closure
- end bay
- rigid frame
- continuous rigid
- construction
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Abstract
The invention discloses a construction method for continuous rigid frame side span by first girder installation and then closure. The method comprises: after erection of an approach bridge precast beam and construction of the last cantilever segment of a continuous rigid frame are completed, arranging a steel strand from the approach bridge to a cantilever beam, and then pouring side span cast-in-side segment concrete, after pouring of closure segment concrete is completed, stretching a closure segment steel strand in a continuous rigid frame box, and other steps. In the method, approach bridge construction operation is firstly performed, and then main bridge closure operation is performed, so approach bridge construction operation and main bridge closure do not interfere with each other, construction time is not limited, and construction period is shortened. Through the approach bridge precast beam to balance weight of a side span cast-in-side segment bracket, weight on the opposite side and a triangular bracket are not needed in side span straight segment construction, and construction cost is effectively saved.
Description
Technical field
The invention belongs to field of bridge construction, be specifically related to closure construction method after a kind of continuous rigid frame end bay is first set a roof beam in place.
Background technology
Main sequence of construction during the closure of current domestic continuous rigid frame bridge is: first reserved separation pier capping beam parados, treats that rigid frame bridge end bay closes
Dragon after longitudinal prestressing steel Shu Zhangla mud jacking, construction separates pier capping beam Elevated section and pinner, installs access bridge portion the most again
Divide precast beam and construction bridge floor attached.This conventional construction technique suffers from the drawback that
Bigger rigid frame bridge high for pier separates pier, because floor stand construction cost puts into big, typically uses bracket to carry out end bay straight line
Section and closure section construction, for ensureing pier stud stress balance, need to arrange respective brackets in respective side and give counterweight, and difficulty of construction is high, becomes
This input is big.
No matter access bridge construction speed what state, rigid frame bridge both sides last across, it is necessary to give way to rigid frame bridge construction, access bridge
Equipment component is long for standby time, and bridge floor appurtenant work also cannot be constructed in time, extends full-bridge total time of construction.Therefore, one is created
Plant novel construction method significant.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency, it is provided that a kind of continuous rigid frame end bay first set a roof beam in place after closure construction method, have
During the continuous rigid frame construction of access bridge, it is possible to economical, realize end bay closure rapidly.
In order to achieve the above object, the present invention comprises the following steps:
Step one, sets up access bridge precast beam, and completes bridge floor and the construction of attached setting；
Step 2, completes the construction of minor details boom segments on continuous rigid frame；
Step 3, installs end bay Cast-in-Situ Segment bracket and template system, and completes the installation of end bay Cast-in-Situ Segment reinforcing bar；
Step 4, releases closure section bed die；
Step 5, wears end bay Cast-in-Situ Segment termination steel strand wires from access bridge precast beam to cantilever beam, installs anchorage and corrugated tube；
Step 6, installs end bay Cast-in-Situ Segment end-blocking template, pours end bay Cast-in-Situ Segment concrete；
Step 7, releases closure section side form, installs closure section reinforcing bar and corrugated tube；
Step 8, closure section locks, completes closure section concreting；
Step 9, stretch-draw closure section steel strand wires in Continuous Rigid Box, and carry out mud jacking, sealing off and covering anchorage；
Step 10, removes end bay Cast-in-Situ Segment bracket and template system, carries out continuous rigid frame bridge floor and attached construction, completes full-bridge construction.
In described step 2, Hanging Basket is used to complete the construction of minor details boom segments on continuous rigid frame.
In described step 3, after end bay Cast-in-Situ Segment bracket and template system are installed, Cast-in-Situ Segment corrugated tube is preset at closure section.
In described step 5, steel strand wires wear to main bridge tooth plate, and end bay Cast-in-Situ Segment termination steel strand wires use the anchoring of p-type anchorage, end bay
Cast-in-Situ Segment corrugated tube pushes to anchored end from closure section.
In described step 8, utilize closure section stiff skeleton locking closure mouth, complete closure section concreting.
In described step 9, during stretch-draw closure section steel strand wires, withstand on design stretching force about 30% to steel initially with oil jack
Twisted wire carries out sky by root and draws, then uses main jack steel strand wires are carried out repeatedly sky to draw at about the 50% of design stretching force, the most laggard
Row stretch-draw.
In described step 9, stretch-draw point two-stage is carried out, and stretch-draw for the first time is the 50% of design stretching force, treats that whole steel Shu Zhangla is complete
After, more first short bundle is stretched to design the 100% of stretching force after long bundle.
In described step 9, after each stretch-draw, stretch-draw jack is made to hold lotus state 5～8 hours, when an oil gauge is read
When number reduces, control stretching force by 100% and carry out anchoring after benefit puts in place.
Compared with prior art, first the present invention carries out access bridge construction operation, then carries out main bridge closure opertation, makes access bridge construction operation
Noiseless with the closure of main bridge, the engineering time is unrestricted, shortens the construction period；By access bridge precast beam to end bay Cast-in-Situ Segment bracket
Counterweight, eliminates counterweight and shelf bracket at offside when end bay straightway is constructed, can be effectively saved construction costs.
Accompanying drawing explanation
Fig. 1 is step one of the present invention to the schematic diagram of step 4；
Fig. 2 is the schematic diagram of step 5 of the present invention；
Fig. 3 position step 6 of the present invention is to the schematic diagram of step 8；
Fig. 4 is step 9 of the present invention to the schematic diagram of step 10.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
Seeing Fig. 1 to Fig. 4, the present invention comprises the following steps:
Step one, sets up access bridge precast beam 1, and completes bridge floor and the construction of attached setting；
Step 2, uses Hanging Basket 2 to complete the construction of minor details boom segments 3 on continuous rigid frame；
Step 3, installs end bay Cast-in-Situ Segment bracket and template system 4, is preset at closure section 9 by Cast-in-Situ Segment corrugated tube, and completes
The installation of end bay Cast-in-Situ Segment reinforcing bar；
Step 4, releases closure section bed die；
Step 5, wears end bay Cast-in-Situ Segment termination steel strand wires 5 from access bridge precast beam 1 to cantilever beam, installs anchorage and corrugated tube, steel
Twisted wire 5 wears to main bridge tooth plate 10, and end bay Cast-in-Situ Segment termination steel strand wires use p-type anchorage 6 to anchor, end bay Cast-in-Situ Segment corrugated tube
Anchored end is pushed to from closure section 9；
Step 6, installs end bay Cast-in-Situ Segment end-blocking template, pours end bay Cast-in-Situ Segment 7 concrete；
Step 7, releases closure section side form, installs closure section reinforcing bar and corrugated tube；
Step 8, closure section 9 locks, and utilizes closure section stiff skeleton 8 locking closure mouth, completes closure section 9 concreting；
Step 9, stretch-draw closure section steel strand wires 5 at main bridge tooth plate 10 in Continuous Rigid Box, and carry out mud jacking, sealing off and covering anchorage；
Step 10, removes Hanging Basket 2 and end bay Cast-in-Situ Segment bracket and template system 4, carries out continuous rigid frame bridge floor and attached construction, complete
Help bridge construction.
In step 9, during stretch-draw closure section steel strand wires 5, withstand on about the 30% of design stretching force initially with oil jack and steel is twisted
Line carries out sky by root and draws, then uses main jack steel strand wires are carried out repeatedly sky to draw at about the 50% of design stretching force, finally carries out
Stretch-draw；Stretch-draw point two-stage is carried out, and stretch-draw for the first time is the 50% of design stretching force, after treating whole steel Shu Zhangla, more first long bundle
Rear short bundle is stretched to design the 100% of stretching force；Every time after stretch-draw, stretch-draw jack is made to hold lotus state 5～8 hours,
When an oil gauge reading reduces, control stretching force by 100% and carry out anchoring after benefit puts in place.
It is thrifty that the present invention has easy construction, duration, and can significantly reduce the features such as cost, and applicant is yellow in copper by its Successful utilization
In the construction of highway Chang Jiahe grand bridge.This bridge superstructure uses 4 × 30m box beam+(75+2 × 140+75) m the most firm
Structure+12 × 40m+54 × 30m box beam, separates pier minimum constructive height 35m, and end bay closure section uses the method for the present invention to construct.
Compared with traditional first closure rear frame member method, decrease shelf bracket and the counterweight separating pier, decrease the work high above the ground time 20
My god；Because before closure, access bridge has been completed whole construction operation, straddle truck, Bridge Erector are withdrawn for 90 days in advance, save and draw after closure
Bridge stand beam and Roadway Construction 30 days, save 120 days durations altogether.
Claims (8)
1. closure construction method after continuous rigid frame end bay is first set a roof beam in place, it is characterised in that comprise the following steps:
Step one, sets up access bridge precast beam (1), and completes bridge floor and the construction of attached setting；
Step 2, completes the construction of minor details boom segments (3) on continuous rigid frame；
Step 3, installs end bay Cast-in-Situ Segment bracket and template system (4), and completes the installation of end bay Cast-in-Situ Segment reinforcing bar；
Step 4, releases closure section bed die；
Step 5, wears end bay Cast-in-Situ Segment termination steel strand wires (5) from access bridge precast beam (1) to cantilever beam, installs anchorage and ripple
Pipe；
Step 6, installs end bay Cast-in-Situ Segment end-blocking template, pours end bay Cast-in-Situ Segment (7) concrete；
Step 7, releases closure section side form, installs closure section reinforcing bar and corrugated tube；
Step 8, closure section (9) locks, completes closure section concreting；
Step 9, stretch-draw closure section steel strand wires (5) in Continuous Rigid Box, and carry out mud jacking, sealing off and covering anchorage；
Step 10, removes end bay Cast-in-Situ Segment bracket and template system (4), carries out continuous rigid frame bridge floor and attached construction, complete full-bridge
Construction.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In two, Hanging Basket (2) is used to complete the construction of minor details boom segments (3) on continuous rigid frame.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In three, after end bay Cast-in-Situ Segment bracket and template system (4) are installed, Cast-in-Situ Segment corrugated tube is preset in closure section (9) place.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In five, steel strand wires (5) wear to main bridge tooth plate (10), and end bay Cast-in-Situ Segment termination steel strand wires use p-type anchorage (6) anchoring,
End bay Cast-in-Situ Segment corrugated tube pushes to anchored end from closure section (9).
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In eight, utilize closure section stiff skeleton (8) locking closure mouth, complete closure section (9) concreting.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In nine, during stretch-draw closure section steel strand wires (5), initially with oil jack withstand on design stretching force about 30% to steel strand wires by
Root carries out sky and draws, then uses main jack steel strand wires are carried out repeatedly sky to draw at about the 50% of design stretching force, finally carries out stretch-draw.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In nine, stretch-draw point two-stage is carried out, and stretch-draw for the first time is the 50% of design stretching force, after treating whole steel Shu Zhangla, more first long bundle
Rear short bundle is stretched to design the 100% of stretching force.
Continuous rigid frame end bay the most according to claim 1 first set a roof beam in place after closure construction method, it is characterised in that described step
In nine, after each stretch-draw, make stretch-draw jack hold lotus state 5～8 hours, when an oil gauge reading reduces, press
100% controls stretching force carries out anchoring after benefit puts in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610254901.2A CN105926443A (en) | 2016-04-21 | 2016-04-21 | Construction method for continuous rigid frame side span by first girder installation and then closure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610254901.2A CN105926443A (en) | 2016-04-21 | 2016-04-21 | Construction method for continuous rigid frame side span by first girder installation and then closure |
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| CN105926443A true CN105926443A (en) | 2016-09-07 |
Family
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| CN201610254901.2A Pending CN105926443A (en) | 2016-04-21 | 2016-04-21 | Construction method for continuous rigid frame side span by first girder installation and then closure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108108565A (en) * | 2017-12-29 | 2018-06-01 | 中铁二局第工程有限公司 | Based on the end bay Cast-in-Situ Segment of software Computer Aided Design without counterweight support construction method |
| CN109944170A (en) * | 2019-05-06 | 2019-06-28 | 重庆建工市政交通工程有限责任公司 | Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method |
| CN110409306A (en) * | 2019-07-23 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of construction method that continuous rigid frame bridge end bay closes up |
| CN111088759A (en) * | 2019-12-24 | 2020-05-01 | 中交二航局第四工程有限公司 | Construction method for steel strand of side span closure section of cast-in-place beam cast by cantilever |
| CN111287096A (en) * | 2020-04-03 | 2020-06-16 | 中国铁建大桥工程局集团有限公司 | Closure construction method for continuous rigid frame beam of lower-towing super large bridge |
| CN111395167A (en) * | 2020-03-13 | 2020-07-10 | 中铁六局集团广州工程有限公司 | Construction method of continuous rigid frame bridge |
| CN112942125A (en) * | 2021-03-11 | 2021-06-11 | 中铁二院工程集团有限责任公司 | Bridge forming method for concrete tie beam with continuous structure of half-through arch bridge |
| CN113073560A (en) * | 2021-03-18 | 2021-07-06 | 中铁大桥局集团有限公司 | Linear section hanger device of continuous beam side span closure-free section and construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108108565A (en) * | 2017-12-29 | 2018-06-01 | 中铁二局第工程有限公司 | Based on the end bay Cast-in-Situ Segment of software Computer Aided Design without counterweight support construction method |
| CN109944170A (en) * | 2019-05-06 | 2019-06-28 | 重庆建工市政交通工程有限责任公司 | Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method |
| CN110409306A (en) * | 2019-07-23 | 2019-11-05 | 中国十七冶集团有限公司 | A kind of construction method that continuous rigid frame bridge end bay closes up |
| CN111088759A (en) * | 2019-12-24 | 2020-05-01 | 中交二航局第四工程有限公司 | Construction method for steel strand of side span closure section of cast-in-place beam cast by cantilever |
| CN111395167A (en) * | 2020-03-13 | 2020-07-10 | 中铁六局集团广州工程有限公司 | Construction method of continuous rigid frame bridge |
| CN111287096A (en) * | 2020-04-03 | 2020-06-16 | 中国铁建大桥工程局集团有限公司 | Closure construction method for continuous rigid frame beam of lower-towing super large bridge |
| CN112942125A (en) * | 2021-03-11 | 2021-06-11 | 中铁二院工程集团有限责任公司 | Bridge forming method for concrete tie beam with continuous structure of half-through arch bridge |
| CN113073560A (en) * | 2021-03-18 | 2021-07-06 | 中铁大桥局集团有限公司 | Linear section hanger device of continuous beam side span closure-free section and construction method |
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Application publication date: 20160907 |
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