CN105648919A - Precast segment double-span circulating assembly construction method for prestressed concrete bridge - Google Patents
Precast segment double-span circulating assembly construction method for prestressed concrete bridge Download PDFInfo
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- CN105648919A CN105648919A CN201610032596.2A CN201610032596A CN105648919A CN 105648919 A CN105648919 A CN 105648919A CN 201610032596 A CN201610032596 A CN 201610032596A CN 105648919 A CN105648919 A CN 105648919A
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- bridge
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- prefabricated subsection
- span
- twin spans
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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
Abstract
The invention provides a precast segment double-span circulating assembly construction method for a prestressed concrete bridge and belongs to the technical field of bridge engineering construction. The construction method adopts a double-span segment assembly bridge girder erection machine to achieve segment assembly construction of a double-span beam through one time of displacement of the bridge girder erection machine and mainly refers to the techniques such as precast segment hoisting, precast segment positioning and longitudinal steel strand bundling and tensioning. According to the construction method, the interplay between two spans in the construction process is effectively reduced, the work efficiency of double-span circulating assembly construction is improved, the effect of the double-span continuous forming segment assembly bridge girder erection machine is fully played, and the construction speed of double-span circulating assembly is almost two times that of single-span circulating assembly.
Description
Technical field
The invention belongs to bridge engineering construction technical field, especially relate to a kind of Prestressed Concrete Bridges prefabricated subsection twin spans circulation assembling and construction method.
Background technology
In China, Prestressed Concrete Bridges Precast Concrete Segmental Bridges construction method begins one's study the sixties in 20th century application, but owing to being subject to the slower development of construction equipment restriction at that time, until the nineties in 20th century just starts large-scale promotion, successively it is applied on a plurality of railways such as Lingwu railway, Line of Nankun Railway, endoscope disinfector, Lan Wu two wires, Xi'an Beihuan line, Zheng Xi Line for Passenger Transportation, Nanchang railway terminal. At present, Prestressed Concrete Bridges Precast Concrete Segmental Bridges is constructed based on single span circulation, the method often constructed a bridge need to be displaced to Bridge Erector next treat frame across, it is more that the Bridge Erector displacement time used accounts for the beam portion engineering time. For reducing the Bridge Erector displacement time used, improve Precast Concrete Segmental Bridges speed of application, a kind of twin spans is adopted even to do Segmental assembling bridge-erecting machine, Bridge Erector once shifts construction two bridge, but circulate in assembling construction at twin spans, according to conventional construction of splicing span by span method, two bridge constructions influence each other, it is difficult to play twin spans and even do the effect of Segmental assembling bridge-erecting machine.
Summary of the invention
In view of this, it is contemplated that propose a kind of Prestressed Concrete Bridges prefabricated subsection twin spans circulation assembling and construction method, effectively reduce influencing each other between the holes beam simultaneously applied, twin spans even does Segmental assembling bridge-erecting machine operation and obtains and give full play to, and bridge prefabrication section assembling speed of application is substantially improved.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of Prestressed Concrete Bridges prefabricated subsection twin spans circulation assembling and construction method, including following construction procedure:
The first step is preparation: even twin spans is done Segmental assembling bridge-erecting machine in place to operating position, then twin spans even does Segmental assembling bridge-erecting machine is converted to bridging state, checks and repetition measurement bridge pier structure;
Second step is prefabricated subsection lifting: adopts beam car that prefabricated subsection is transported to twin spans and even does the afterbody of Segmental assembling bridge-erecting machine, after utilization, prefabricated subsection is hung the appointment position to lower joist by bale handle straddle truck, twin spans even do Segmental assembling bridge-erecting machine front end hoisting prefabricated sections backward piecemeal;
3rd step is prefabricated subsection positioning: extract twin spans even do before and after the girder of Segmental assembling bridge-erecting machine across connection steel pin, girder is changed into freely supported structure by continuous structure, the position of the every bridge section of iterative cycles adjustment, successively according to longitudinally, laterally with vertical adjustment order;
4th step is steel strand wires constructions: after steel wire, volume bundle, adopt hand fit's mechanical traction whole strand pricking;
5th step is wet seam construction: the wet seam between prefabricated subsection is successively according to the sequence construction connecting reinforcing bar, shuttering, casting concrete, health preserving and form removal;
6th step is steel strand tension: carry out vertical and horizontal conventional pre-stress construction, between two bridge, the steel strand tension time of same position staggers mutually, complete at one group of steel strand tension, after fracture of wire passed examination, cut unnecessary steel strand wires, to ensure that another bridge same position steel strand wires have sufficient space and carry out stretch-draw operation;
7th step is round-off work: complete the cutting of residue steel strand wires, carries out mud jacking, end-blocking, the construction of beam-ends water-repellent paint, and lower joist support system unloads, and even do Segmental assembling bridge-erecting machine is converted to displaced condition to twin spans, shifts, and prepares lower two bridge constructions.
Further, in described second step, while rear bale handle straddle truck handling prefabricated subsection from back to front, premise beam gantry lifts up into the accurate adjustment of cross girders section plan-position.
Further, in described 3rd step, the positioning of beam section is from longitudinally, laterally transposing with vertical three directions, longitudinal positioning utilizes premise diplodocus gantry crane and the running mechanism of rear bale handle straddle truck, horizontal positioning utilizes the jacking cylinder on longeron to adjust, and vertical positioning is adjusted by 4 flat jack bottom each prefabricated subsection box beam and the leading screw on longeron and is kept.
Further, in described 4th step, adopting and start lashing foremost from two bridge, once through holes beam, lashing completes laggard row corrugated tube and connects.
Relative to prior art, Prestressed Concrete Bridges prefabricated subsection twin spans of the present invention circulation assembling and construction method has the advantage that
By the construction method of the present invention, effectively reducing influencing each other between the holes beam simultaneously applied, twin spans even does Segmental assembling bridge-erecting machine operation and obtains and give full play to, and bridge prefabrication section assembling speed of application is substantially improved, bridge construction is significant, there is higher application value.
Accompanying drawing explanation
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:
Fig. 1 is the construction technology process schematic diagram of the present invention;
Fig. 2 is the structural representation that twin spans of the present invention even does Segmental assembling bridge-erecting machine.
Description of reference numerals:
1-girder; Joist under 2-; 3-front fulcrum support roller system; 4-central bearing point support roller system; 5-rear fulcrum support roller system; 6-premise diplodocus gantry crane; Bale handle straddle truck after 7-; 8-beam car; 9-connects steel pin.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Include girder 1, lower joist 2, front fulcrum support roller system 3, central bearing point support roller system 4, rear fulcrum support roller system 5, premise diplodocus gantry crane 6, rear bale handle straddle truck 7, beam car 8 as in figure 2 it is shown, twin spans of the present invention even does Segmental assembling bridge-erecting machine and connect steel pin 9.
As shown in Figure 1, 2, the present invention provides a kind of Prestressed Concrete Bridges prefabricated subsection twin spans circulation assembling and construction method, including following construction procedure:
The first step is preparation: even twin spans is done Segmental assembling bridge-erecting machine in place to operating position, then twin spans even does Segmental assembling bridge-erecting machine is converted to bridging state, checks and repetition measurement bridge pier structure;
Second step is prefabricated subsection lifting: adopts beam car 8 that prefabricated subsection is transported to twin spans and even does the afterbody of Segmental assembling bridge-erecting machine, after utilization, prefabricated subsection is hung the appointment position to lower joist 2 by bale handle straddle truck 7, twin spans even do Segmental assembling bridge-erecting machine front end hoisting prefabricated sections backward piecemeal;
3rd step is prefabricated subsection positioning: extract twin spans even do before and after the girder 1 of Segmental assembling bridge-erecting machine across connection steel pin 9, girder 1 is changed into freely supported structure by continuous structure, the position of the every bridge section of iterative cycles adjustment, successively according to longitudinally, laterally with vertical adjustment order;
4th step is steel strand wires constructions: after steel wire, volume bundle, adopt hand fit's mechanical traction whole strand pricking;
5th step is wet seam construction: the wet seam between prefabricated subsection is successively according to the sequence construction connecting reinforcing bar, shuttering, casting concrete, health preserving and form removal;
6th step is steel strand tension: carry out vertical and horizontal conventional pre-stress construction, between two bridge, the steel strand tension time of same position staggers mutually, complete at one group of steel strand tension, after fracture of wire passed examination, cut unnecessary steel strand wires, to ensure that another bridge same position steel strand wires have sufficient space and carry out stretch-draw operation;
7th step is round-off work: complete the cutting of residue steel strand wires, carries out mud jacking, end-blocking, the construction of beam-ends water-repellent paint, and lower joist support system unloads, and even do Segmental assembling bridge-erecting machine is converted to displaced condition to twin spans, shifts, and prepares lower two bridge constructions.
In described second step, while rear bale handle straddle truck 7 handling prefabricated subsection from back to front, premise diplodocus gantry crane 6 carries out the accurate adjustment of beam section plan-position.
In described 3rd step, the positioning of beam section is from longitudinally, laterally transposing with vertical three directions, longitudinal positioning utilizes premise diplodocus gantry crane 6 and the running mechanism of rear bale handle straddle truck 7, horizontal positioning utilizes the jacking cylinder on longeron to adjust, and vertical positioning is adjusted by 4 flat jack bottom each prefabricated subsection box beam and the leading screw on longeron and is kept.
In described 4th step, adopting and start lashing foremost from two bridge, once through holes beam, lashing completes laggard row corrugated tube and connects.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (4)
1. a Prestressed Concrete Bridges prefabricated subsection twin spans circulation assembling and construction method, it is characterised in that: include following construction procedure:
The first step is preparation: even twin spans is done Segmental assembling bridge-erecting machine in place to operating position, then twin spans even does Segmental assembling bridge-erecting machine is converted to bridging state, checks and repetition measurement bridge pier structure;
Second step is prefabricated subsection lifting: adopts beam car that prefabricated subsection is transported to twin spans and even does the afterbody of Segmental assembling bridge-erecting machine, after utilization, prefabricated subsection is hung the appointment position to lower joist by bale handle straddle truck, twin spans even do Segmental assembling bridge-erecting machine front end hoisting prefabricated sections backward piecemeal;
3rd step is prefabricated subsection positioning: extract twin spans even do before and after the girder of Segmental assembling bridge-erecting machine across connection steel pin, girder is changed into freely supported structure by continuous structure, the position of the every bridge section of iterative cycles adjustment, successively according to longitudinally, laterally with vertical adjustment order;
4th step is steel strand wires constructions: after steel wire, volume bundle, adopt hand fit's mechanical traction whole strand pricking;
5th step is wet seam construction: the wet seam between prefabricated subsection is successively according to the sequence construction connecting reinforcing bar, shuttering, casting concrete, health preserving and form removal;
6th step is steel strand tension: carry out vertical and horizontal conventional pre-stress construction, between two bridge, the steel strand tension time of same position staggers mutually, complete at one group of steel strand tension, after fracture of wire passed examination, cut unnecessary steel strand wires, to ensure that another bridge same position steel strand wires have sufficient space and carry out stretch-draw operation;
7th step is round-off work: complete the cutting of residue steel strand wires, carries out mud jacking, end-blocking, the construction of beam-ends water-repellent paint, and lower joist support system unloads, and even do Segmental assembling bridge-erecting machine is converted to displaced condition to twin spans, shifts, and prepares lower two bridge constructions.
2. Prestressed Concrete Bridges prefabricated subsection twin spans according to claim 1 circulation assembling and construction method, it is characterized in that: in described second step, while rear bale handle straddle truck handling prefabricated subsection from back to front, premise beam gantry lifts up into the accurate adjustment of cross girders section plan-position.
3. Prestressed Concrete Bridges prefabricated subsection twin spans according to claim 1 circulation assembling and construction method, it is characterized in that: in described 3rd step, the positioning of beam section is from longitudinally, laterally transposing with vertical three directions, longitudinal positioning utilizes premise diplodocus gantry crane and the running mechanism of rear bale handle straddle truck, horizontal positioning utilizes the jacking cylinder on longeron to adjust, and vertical positioning is adjusted by 4 flat jack bottom each prefabricated subsection box beam and the leading screw on longeron and is kept.
4. Prestressed Concrete Bridges prefabricated subsection twin spans according to claim 1 circulation assembling and construction method, it is characterized in that: in described 4th step, adopting and start lashing foremost from two bridge, once through holes beam, lashing completes laggard row corrugated tube and connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610032596.2A CN105648919A (en) | 2016-01-18 | 2016-01-18 | Precast segment double-span circulating assembly construction method for prestressed concrete bridge |
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| CN201610032596.2A CN105648919A (en) | 2016-01-18 | 2016-01-18 | Precast segment double-span circulating assembly construction method for prestressed concrete bridge |
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| CN105648919A true CN105648919A (en) | 2016-06-08 |
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| CN201610032596.2A Pending CN105648919A (en) | 2016-01-18 | 2016-01-18 | Precast segment double-span circulating assembly construction method for prestressed concrete bridge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205934A (en) * | 2019-04-30 | 2019-09-06 | 中铁八局集团第二工程有限公司 | One kind is set a roof beam in place system for the mobile assembled of precast segmental beam Support Method joggle beam |
| CN110258352A (en) * | 2019-07-31 | 2019-09-20 | 河南省交通规划设计研究院股份有限公司 | The steel reinforced concrete combined bridge construction method that two bridgings are done |
| CN110344334A (en) * | 2019-07-31 | 2019-10-18 | 河南省交通规划设计研究院股份有限公司 | Steel reinforced concrete combined bridge construction method is done using two bridgings of dorsal funciculus formula Bridge Erector |
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| CN1566536A (en) * | 2003-06-13 | 2005-01-19 | 上海市第七建筑有限公司 | Construction method of girder erection by bridging machine |
| JP2009041271A (en) * | 2007-08-09 | 2009-02-26 | Ps Mitsubishi Construction Co Ltd | Construction method for bridge |
| CN201635012U (en) * | 2010-02-02 | 2010-11-17 | 中铁十一局集团第六工程有限公司 | Bridge box girder erection machine |
| CN104179123A (en) * | 2014-08-26 | 2014-12-03 | 中国铁建大桥工程局集团有限公司 | Bridge fabrication machine capable of building and assembling two bridge segments |
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2016
- 2016-01-18 CN CN201610032596.2A patent/CN105648919A/en active Pending
Patent Citations (4)
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| CN1566536A (en) * | 2003-06-13 | 2005-01-19 | 上海市第七建筑有限公司 | Construction method of girder erection by bridging machine |
| JP2009041271A (en) * | 2007-08-09 | 2009-02-26 | Ps Mitsubishi Construction Co Ltd | Construction method for bridge |
| CN201635012U (en) * | 2010-02-02 | 2010-11-17 | 中铁十一局集团第六工程有限公司 | Bridge box girder erection machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205934A (en) * | 2019-04-30 | 2019-09-06 | 中铁八局集团第二工程有限公司 | One kind is set a roof beam in place system for the mobile assembled of precast segmental beam Support Method joggle beam |
| CN110258352A (en) * | 2019-07-31 | 2019-09-20 | 河南省交通规划设计研究院股份有限公司 | The steel reinforced concrete combined bridge construction method that two bridgings are done |
| CN110344334A (en) * | 2019-07-31 | 2019-10-18 | 河南省交通规划设计研究院股份有限公司 | Steel reinforced concrete combined bridge construction method is done using two bridgings of dorsal funciculus formula Bridge Erector |
| CN110344334B (en) * | 2019-07-31 | 2021-08-24 | 河南省交通规划设计研究院股份有限公司 | Construction method for two-span continuous steel-concrete composite bridge by adopting back cable type bridge girder erection machine |
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Application publication date: 20160608 |