CN109944170A - Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method - Google Patents
Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method Download PDFInfo
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- 239000000463 material Substances 0.000 claims abstract description 6
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Abstract
The present invention relates to technical field of building construction, more particularly to continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method, specific steps are as follows: preparation of construction → construction monitoring calculates analysis → cantilever construction to closure section and the transformation of access bridge construction → hanging basket advancing and platform hanging basket, precompressed → end bay cast-in-place section construction → end bay closure section construction → end bay closure section tensioning → and hangs platform system and remove.It is compared with the traditional method, effectively solves the problems, such as that high pier bracket is set up, avoid a large amount of bracket erection constructions, system stress is hung using Hanging Basket, construction technology is simple, reduces materials'use amount, reduces the use of Large-scale Hoisting equipment, simultaneously for work such as bracket that may be present processing, it with save the cost, saves the duration, Technical Economy preferably waits clear superiorities, and avoiding conventional construction bracket sets up, and the work such as a large amount of based process are avoided, the duration saves apparent.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integration
The construction method of construction system is suitable for Hanging Basket cantilever construction end bay Cast-in-Situ Segment and closure section erection without scaffolding.
Background technique
As infrastructure construction in china constantly promotes rapidly, a large amount of sciences of bridge building emerge in large numbers, and big Span Continuous beam bridge is mesh
One of preceding main type of bridge.Such bridge generallys use precast beam structure in non-main span, and main span uses continuous beam, utilizes extension
Basket carries out cantilever casting construction.Cradle construction continuous beam end bay closure section and Cast-in-Situ Segment high pier construction are very common, generally use
Construction method is support cast-in-place.But pier stud is higher, and it is larger that bracket sets up difficulty, and lifting is difficult, and bracket elongate stabilization is deteriorated, and needs
Increase more material.Bracket sets up difficulty there are foundation treatment simultaneously, and increased costs and construction period are elongated.
Summary of the invention
In view of problems of the prior art, the present invention provides continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integration
The construction method of construction system, it is easy for construction, it effectively solves the problems, such as that high pier bracket is set up, avoids a large amount of bracket erection constructions,
System stress is hung using Hanging Basket, construction technology is simple.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system include end bay pier shaft, away from end bay pier shaft recently in
Across on pier shaft and close to the continuous of construction beam side across pier shaft, the construction beam being erected on end bay pier shaft and in being erected at
Beam, it is characterised in that: further include Hanging Basket, underframe longitudinal member and floor beam, the Hanging Basket effect is mounted on continuous beam, the bottom
One end of plate stringer rides upon on end bay pier shaft, the other end rides upon on Hanging Basket, and the floor beam is erected at underframe longitudinal member
Bottom, the Cast-in-Situ Segment and closure section are cast on underframe longitudinal member and in the spaces between construction beam and continuous beam.
It further limits, the underframe longitudinal member and floor beam are at the lower edge of construction beam and continuous beam,
The wing plate nose girder being also provided at construction beam and continuous beam upper edge right above underframe longitudinal member.
Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated system, specific construction method the following steps are included:
1. preparation of construction: according to conventional stand-by mode, tentatively drafting construction technical schemes, carry out temporary supporting system arrangement, system
Temporary load(ing) situation is counted, the technology branch of relevant departments is obtained according to stress of the calculating analysis beam body under hoisted load
It holds, is analyzed by calculating, work out special construction plan, complete the construction of end bay Cast-in-Situ Segment access bridge, end bay Cast-in-Situ Segment and closure are provided
Duan Zhidian, and procedure of submitting reports for approval is completed, carry out the work of confiding a technological secret before going into operation；
2. construction monitoring calculates analysis: according to end bay is cast-in-place and joint scheme designs, 1/2 company of will act on of Hanging Basket Cast-in-Situ Segment weight
Continuous girder cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
According to end bay is cast-in-place and joint scheme design, Hanging Basket closure pours the 1/2 of the sum of section+Cast-in-Situ Segment weight and will act on continuous beam
Cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
Access bridge hangs the impact analysis of end bay Cast-in-Situ Segment and end bay closure section load to bridge internal force；
3. cantilever construction to closure section and access bridge is constructed: after by the construction of main pier pier top 0# block, then the symmetrical cantilever pouring in two sides,
The outstanding beam section that fills uses Hanging Basket cantilever construction, after the completion of one of them main pier cantilever construction, retreat in time in across Hanging Basket, be the other side
Back boom construction hanging basket provides working space, in the last one cantilever segmental construction, needs each sunpender of Hanging Basket passing through box beam
Hole suitably amplify, it is ensured that box beam deform when sunpender can in the hole of box beam front and back move freely, access bridge construct when in access bridge
Sunpender hole is reserved on wing plate and top plate to support as stringer under stringer, wing plate inside Hanging Basket；
4. hanging basket advancing and platform hanging basket transformation, precompressed: boom segments end is moved forward to after the completion of Hanging Basket cantilever construction, by Hanging Basket
Stringer be adjusted to it is consistent with abutment pier top surface absolute altitude locate, whether detection stringer length meets end bay Cast-in-Situ Segment and closure section pours length
Degree, the spreading stringer in the ungratified situation of height；Lower beam before Hanging Basket is extended into bridge pier, then Hanging Basket stringer is ridden upon into bridge
Front crossbeam is removed after on pier, and overlap joint is met by the mobile adjustment stringer position of Hanging Basket and is required, wherein end bay Cast-in-Situ Segment and closure
Section wing plate outside-supporting beam and inside top plate supporting beam by finish rolling deformed bar are hung on access bridge wing plate and inner top panel；Remove cantilever
When Hanging Basket, end bay closure section bracket and installation template are set up, construction material, equipment in removing case top, case are applied for closure section
The material and facility of work is put in an orderly manner to pier top；
Hanging Basket is transformed after the completion of stage+module, carries out precompressed to whole system, end bay construction section uses steel and 1t/ bags of sandbag
Common preloading carries out preloading according to the sequence of bottom plate, web, top plate and wing plate, wherein by 40% → 60% → 80% → 100% →
The other end of 120% multistage loadings, T structure is balanced ballast by water tank；
5. end bay cast-in-place section construction: end bay cast-in-place section construction platform floor is supported on abutment pier by Hanging Basket stringer and Hanging Basket cantilever is applied
Workshop section, wing plate are supported on longitudinal hanging beam, and when end bay cast-in-place section construction, installation bed die and side form first adjust template
Position and absolute altitude carry out the installation at bottom, abdomen, top and diaphragm plate reinforcing bar, bellows after installation inner support, internal model and sealing end mould, most
After-pouring concrete, according to embedded anchorage is designed, realizes one-end tension when constructing end bay Cast-in-Situ Segment；
In end bay cast-in-place section construction, need to end bay cantilever end carry out ballast, and according to design and monitoring requirement in across side into
Row counterweight, when Cast-in-Situ Segment pours concrete, cantilever end, which synchronizes, to discharge water, to keep cantilever end elevation not change, end bay cantilever end with
Midspan closing end counterweight is all made of water tank and the mode that end bay cantilever end carries out ballast is arranged in, and wherein the weight of water tank is existing for end bay
Pour end and pour the 1/2 of weight, wherein water tank welds water tank using brick or irony, when end bay Cast-in-Situ Segment pours, in across water tank not
Waterproof unloading, only end bay cantilever end discharges water unloading；
6. end bay closure section construction: being locked according to midspan closing hanger installation → reinforcing bar binding → prestress pipe installation → closure
It is fixed, remove lateral opening bracket, remove central bearing point horizontal direction temporary constraint → selection on the day of minimum temperature time casting concrete →
Removal water tank ballast → closure section prestressed stretch-draw, anchoring, grouting finish step by step while casting concrete sequence carries out
Construction, closure pour cantilever end and should temporarily connect with end bay Cast-in-Situ Segment, and the section concrete that avoids joining the two sections of a bridge, etc is pouring and premature cure mistake
Apparent volume change occurs in journey, locking time is executed by closure section locking design, and Construction Support stiff skeleton is using " pre-buried
The bold property I-shaped steel skeleton+pre-embedded anchoring bolts of foundation bolt+connection "；
7. end bay closure section tensioning: according to Design of Construction Organization arrangement, adjusting prestressing force in advance is one-end tension technique, cast-in-place
Embedded anchor plate tensioning position, installs both ends tension ground tackle for anchored end after lashing when section construction, passes through anchorage using steel strand wires,
And pre-tightened in the other end using single tendon stretch jack, entire beam tension is finally carried out using the jack for adapting to specification；
8. hanging platform system dismounting: after end bay closure is constructed, according to the stress specific requirement of midspan closing, prestressed grouting
Platform is hung in dismounting after reaching design requirement, is hung platform and is unclamped hangar system first when removing, is supported on the Hanging Basket stringer of abutment pier
Lower reduction lowering device is disengaged end template, is gradually transferred Hanging Basket floor beam, stringer to ground, Hanging Basket master using hoist engine
Truss is moved to the 0# sections of enough positions of Lifting Capacity by walking line mode, and is removed using loop wheel machine, wherein when removing, it then follows
The principle of " first prop up and tear open afterwards, rear branch is first torn open ".
According to the Comprehensive Correlation of the prior art, this construction method had the advantage that above
1. it is easy for construction, it effectively solves the problems, such as that high pier bracket is set up, avoids a large amount of bracket erection constructions, body is hung using Hanging Basket
It is stress, construction technology is simple.
2. Technical Economy is good: present approach reduces materials'use amounts, reduce the use of Large-scale Hoisting equipment, same to hour hands
To work such as bracket that may be present processing, there is save the cost, save the duration, Technical Economy preferably waits clear superiorities.
3. the duration saves, efficiency is improved: continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integration non-stand construction method
It avoids conventional construction bracket to set up, and avoids the work such as a large amount of based process, the duration saves apparent.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system；
Fig. 2 is the flow diagram of the construction method of continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system；
Corresponding mark is respectively as follows: 1- end bay pier shaft in figure, across pier shaft in 2-, 3- construction beam, and 4- continuous beam, 5- Hanging Basket, the bottom 6-
Plate stringer, 7- floor beam, 8- wing plate nose girder.
Specific embodiment
In order to which those skilled in the art may be better understood, with reference to the accompanying drawings and examples to the technology of the present invention
Scheme further illustrates.
Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system as shown in Figure 1, including end bay pier shaft 1,
Away from end bay pier shaft 1 recently in across pier shaft 2, the construction beam 3 being erected on end bay pier shaft 1 and in being erected at across on pier shaft 2 and
Continuous beam 4 close to 3 side of construction beam, it is characterised in that: further include Hanging Basket 5, underframe longitudinal member 6 and floor beam 7, the extension
The effect of basket 5 is mounted on continuous beam 4, and one end of the underframe longitudinal member 6 rides upon on end bay pier shaft 2, the other end rides upon Hanging Basket 5
On, the floor beam 7 is erected at the bottom of underframe longitudinal member 6, and the Cast-in-Situ Segment and closure section are cast on underframe longitudinal member 6 and locate
In the space between construction beam 3 and continuous beam 4.The underframe longitudinal member 6 and floor beam 7 are in construction beam 3 and continuously
At the lower edge of beam 4, it is also provided with the wing plate right above underframe longitudinal member 6 at 4 upper edge of construction beam 3 and continuous beam and leads
Beam 8.
Its specific construction method the following steps are included:
1. preparation of construction: according to conventional stand-by mode, tentatively drafting construction technical schemes, carry out temporary supporting system arrangement, system
Temporary load(ing) situation is counted, the technology branch of relevant departments is obtained according to stress of the calculating analysis beam body under hoisted load
It holds, is analyzed by calculating, work out special construction plan, complete the construction of end bay Cast-in-Situ Segment access bridge, end bay Cast-in-Situ Segment and closure are provided
Duan Zhidian, and procedure of submitting reports for approval is completed, carry out the work of confiding a technological secret before going into operation；
2. construction monitoring calculates analysis: according to end bay is cast-in-place and joint scheme designs, 1/2 company of will act on of Hanging Basket Cast-in-Situ Segment weight
Continuous girder cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
According to end bay is cast-in-place and joint scheme design, Hanging Basket closure pours the 1/2 of the sum of section+Cast-in-Situ Segment weight and will act on continuous beam
Cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
Access bridge hangs the impact analysis of end bay Cast-in-Situ Segment and end bay closure section load to bridge internal force；
3. cantilever construction to closure section and access bridge is constructed: after by the construction of main pier pier top 0# block, then the symmetrical cantilever pouring in two sides,
The outstanding beam section that fills uses Hanging Basket cantilever construction, after the completion of one of them main pier cantilever construction, retreat in time in across Hanging Basket, be the other side
Back boom construction hanging basket provides working space, in the last one cantilever segmental construction, needs each sunpender of Hanging Basket passing through box beam
Hole suitably amplify, it is ensured that box beam deform when sunpender can in the hole of box beam front and back move freely, access bridge construct when in access bridge
Sunpender hole is reserved on wing plate and top plate to support as stringer under stringer, wing plate inside Hanging Basket；
4. hanging basket advancing and platform hanging basket transformation, precompressed: boom segments end is moved forward to after the completion of Hanging Basket cantilever construction, by Hanging Basket
Stringer be adjusted to it is consistent with abutment pier top surface absolute altitude locate, whether detection stringer length meets end bay Cast-in-Situ Segment and closure section pours length
Degree, the spreading stringer in the ungratified situation of height；Lower beam before Hanging Basket is extended into bridge pier, then Hanging Basket stringer is ridden upon into bridge
Front crossbeam is removed after on pier, and overlap joint is met by the mobile adjustment stringer position of Hanging Basket and is required, wherein end bay Cast-in-Situ Segment and closure
Section wing plate outside-supporting beam and inside top plate supporting beam by finish rolling deformed bar are hung on access bridge wing plate and inner top panel；Remove cantilever
When Hanging Basket, end bay closure section bracket and installation template are set up, construction material, equipment in removing case top, case are applied for closure section
The material and facility of work is put in an orderly manner to pier top；
Hanging Basket is transformed after the completion of stage+module, carries out precompressed to whole system, end bay construction section uses steel and 1t/ bags of sandbag
Common preloading carries out preloading according to the sequence of bottom plate, web, top plate and wing plate, wherein by 40% → 60% → 80% → 100% →
The other end of 120% multistage loadings, T structure is balanced ballast by water tank；
5. end bay cast-in-place section construction: end bay cast-in-place section construction platform floor is supported on abutment pier by Hanging Basket stringer and Hanging Basket cantilever is applied
Workshop section, wing plate are supported on longitudinal hanging beam, and when end bay cast-in-place section construction, installation bed die and side form first adjust template
Position and absolute altitude carry out the installation at bottom, abdomen, top and diaphragm plate reinforcing bar, bellows after installation inner support, internal model and sealing end mould, most
After-pouring concrete, according to embedded anchorage is designed, realizes one-end tension when constructing end bay Cast-in-Situ Segment；
In end bay cast-in-place section construction, need to end bay cantilever end carry out ballast, and according to design and monitoring requirement in across side into
Row counterweight, when Cast-in-Situ Segment pours concrete, cantilever end, which synchronizes, to discharge water, to keep cantilever end elevation not change, end bay cantilever end with
Midspan closing end counterweight is all made of water tank and the mode that end bay cantilever end carries out ballast is arranged in, and wherein the weight of water tank is existing for end bay
Pour end and pour the 1/2 of weight, wherein water tank welds water tank using brick or irony, when end bay Cast-in-Situ Segment pours, in across water tank not
Waterproof unloading, only end bay cantilever end discharges water unloading；
6. end bay closure section construction: being locked according to midspan closing hanger installation → reinforcing bar binding → prestress pipe installation → closure
It is fixed, remove lateral opening bracket, remove central bearing point horizontal direction temporary constraint → selection on the day of minimum temperature time casting concrete →
Removal water tank ballast → closure section prestressed stretch-draw, anchoring, grouting finish step by step while casting concrete sequence carries out
Construction, closure pour cantilever end and should temporarily connect with end bay Cast-in-Situ Segment, and the section concrete that avoids joining the two sections of a bridge, etc is pouring and premature cure mistake
Apparent volume change occurs in journey, locking time is executed by closure section locking design, and Construction Support stiff skeleton is using " pre-buried
The bold property I-shaped steel skeleton+pre-embedded anchoring bolts of foundation bolt+connection "；
7. end bay closure section tensioning: according to Design of Construction Organization arrangement, adjusting prestressing force in advance is one-end tension technique, cast-in-place
Embedded anchor plate tensioning position, installs both ends tension ground tackle for anchored end after lashing when section construction, passes through anchorage using steel strand wires,
And pre-tightened in the other end using single tendon stretch jack, entire beam tension is finally carried out using the jack for adapting to specification；
8. hanging platform system dismounting: after end bay closure is constructed, according to the stress specific requirement of midspan closing, prestressed grouting
Platform is hung in dismounting after reaching design requirement, is hung platform and is unclamped hangar system first when removing, is supported on the Hanging Basket stringer of abutment pier
Lower reduction lowering device is disengaged end template, is gradually transferred Hanging Basket floor beam, stringer to ground, Hanging Basket master using hoist engine
Truss is moved to the 0# sections of enough positions of Lifting Capacity by walking line mode, and is removed using loop wheel machine, wherein when removing, it then follows
The principle of " first prop up and tear open afterwards, rear branch is first torn open ".
Above to it is provided by the invention be suitable for continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system into
It has gone and has been discussed in detail, the explanation of specific embodiment is merely used to help understand method and its core concept of the invention.It should refer to
It out, for those skilled in the art, without departing from the principle of the present invention, can also be to the present invention
Some improvement and modification can also be carried out, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (3)
1. continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system, including it is end bay pier shaft, nearest away from end bay pier shaft
In across pier shaft, the construction beam being erected on end bay pier shaft and in being erected at across the company on pier shaft and close to construction beam side
Continuous beam, it is characterised in that: further include Hanging Basket, underframe longitudinal member and floor beam, the Hanging Basket effect is mounted on continuous beam, described
One end of underframe longitudinal member rides upon on end bay pier shaft, the other end rides upon on Hanging Basket, and the floor beam is erected at underframe longitudinal member
Bottom, the Cast-in-Situ Segment and closure section are cast on underframe longitudinal member and in the spaces between construction beam and continuous beam.
2. continuous beam with high-pier end bay Cast-in-Situ Segment according to claim 1 and closure section integrated construction system, feature exist
In: the underframe longitudinal member and floor beam are at the lower edge of construction beam and continuous beam, on construction beam and continuous beam
Edge is also provided with the wing plate nose girder right above underframe longitudinal member.
3. the construction party of continuous beam with high-pier end bay Cast-in-Situ Segment according to claim 1 and closure section integrated construction system
Method includes the following steps:
1. preparation of construction: according to conventional stand-by mode, tentatively drafting construction technical schemes, carry out temporary supporting system arrangement, system
Temporary load(ing) situation is counted, the technology branch of relevant departments is obtained according to stress of the calculating analysis beam body under hoisted load
It holds, is analyzed by calculating, work out special construction plan, complete the construction of end bay Cast-in-Situ Segment access bridge, end bay Cast-in-Situ Segment and closure are provided
Duan Zhidian, and procedure of submitting reports for approval is completed, carry out the work of confiding a technological secret before going into operation；
2. construction monitoring calculates analysis: according to end bay is cast-in-place and joint scheme designs, 1/2 company of will act on of Hanging Basket Cast-in-Situ Segment weight
Continuous girder cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
According to end bay is cast-in-place and joint scheme design, Hanging Basket closure pours the 1/2 of the sum of section+Cast-in-Situ Segment weight and will act on continuous beam
Cantilever end, in the case where cantilever end increases loading condition, analysis influences bridge internal force, determines counterweight scheme,
Access bridge hangs the impact analysis of end bay Cast-in-Situ Segment and end bay closure section load to bridge internal force；
3. cantilever construction to closure section and access bridge is constructed: after by the construction of main pier pier top 0# block, then the symmetrical cantilever pouring in two sides,
The outstanding beam section that fills uses Hanging Basket cantilever construction, after the completion of one of them main pier cantilever construction, retreat in time in across Hanging Basket, be the other side
Back boom construction hanging basket provides working space, in the last one cantilever segmental construction, needs each sunpender of Hanging Basket passing through box beam
Hole suitably amplify, it is ensured that box beam deform when sunpender can in the hole of box beam front and back move freely, access bridge construct when in access bridge
Sunpender hole is reserved on wing plate and top plate to support as stringer under stringer, wing plate inside Hanging Basket；
4. hanging basket advancing and platform hanging basket transformation, precompressed: boom segments end is moved forward to after the completion of Hanging Basket cantilever construction, by Hanging Basket
Stringer be adjusted to it is consistent with abutment pier top surface absolute altitude locate, whether detection stringer length meets end bay Cast-in-Situ Segment and closure section pours length
Degree, the spreading stringer in the ungratified situation of height；Lower beam before Hanging Basket is extended into bridge pier, then Hanging Basket stringer is ridden upon into bridge
Front crossbeam is removed after on pier, and overlap joint is met by the mobile adjustment stringer position of Hanging Basket and is required, wherein end bay Cast-in-Situ Segment and closure
Section wing plate outside-supporting beam and inside top plate supporting beam by finish rolling deformed bar are hung on access bridge wing plate and inner top panel；Remove cantilever
When Hanging Basket, end bay closure section bracket and installation template are set up, construction material, equipment in removing case top, case are applied for closure section
The material and facility of work is put in an orderly manner to pier top；
Hanging Basket is transformed after the completion of stage+module, carries out precompressed to whole system, end bay construction section uses steel and 1t/ bags of sandbag
Common preloading carries out preloading according to the sequence of bottom plate, web, top plate and wing plate, wherein by 40% → 60% → 80% → 100% →
The other end of 120% multistage loadings, T structure is balanced ballast by water tank；
5. end bay cast-in-place section construction: end bay cast-in-place section construction platform floor is supported on abutment pier by Hanging Basket stringer and Hanging Basket cantilever is applied
Workshop section, wing plate are supported on longitudinal hanging beam, and when end bay cast-in-place section construction, installation bed die and side form first adjust template
Position and absolute altitude carry out the installation at bottom, abdomen, top and diaphragm plate reinforcing bar, bellows after installation inner support, internal model and sealing end mould, most
After-pouring concrete, according to embedded anchorage is designed, realizes one-end tension when constructing end bay Cast-in-Situ Segment；
In end bay cast-in-place section construction, need to end bay cantilever end carry out ballast, and according to design and monitoring requirement in across side into
Row counterweight, when Cast-in-Situ Segment pours concrete, cantilever end, which synchronizes, to discharge water, to keep cantilever end elevation not change, end bay cantilever end with
Midspan closing end counterweight is all made of water tank and the mode that end bay cantilever end carries out ballast is arranged in, and wherein the weight of water tank is existing for end bay
Pour end and pour the 1/2 of weight, wherein water tank welds water tank using brick or irony, when end bay Cast-in-Situ Segment pours, in across water tank not
Waterproof unloading, only end bay cantilever end discharges water unloading；
6. end bay closure section construction: being locked according to midspan closing hanger installation → reinforcing bar binding → prestress pipe installation → closure
It is fixed, remove lateral opening bracket, remove central bearing point horizontal direction temporary constraint → selection on the day of minimum temperature time casting concrete →
Removal water tank ballast → closure section prestressed stretch-draw, anchoring, grouting finish step by step while casting concrete sequence carries out
Construction, closure pour cantilever end and should temporarily connect with end bay Cast-in-Situ Segment, and the section concrete that avoids joining the two sections of a bridge, etc is pouring and premature cure mistake
Apparent volume change occurs in journey, locking time is executed by closure section locking design, and Construction Support stiff skeleton is using " pre-buried
The bold property I-shaped steel skeleton+pre-embedded anchoring bolts of foundation bolt+connection "；
7. end bay closure section tensioning: according to Design of Construction Organization arrangement, adjusting prestressing force in advance is one-end tension technique, cast-in-place
Embedded anchor plate tensioning position, installs both ends tension ground tackle for anchored end after lashing when section construction, passes through anchorage using steel strand wires,
And pre-tightened in the other end using single tendon stretch jack, entire beam tension is finally carried out using the jack for adapting to specification；
8. hanging platform system dismounting: after end bay closure is constructed, according to the stress specific requirement of midspan closing, prestressed grouting
Platform is hung in dismounting after reaching design requirement, is hung platform and is unclamped hangar system first when removing, is supported on the Hanging Basket stringer of abutment pier
Lower reduction lowering device is disengaged end template, is gradually transferred Hanging Basket floor beam, stringer to ground, Hanging Basket master using hoist engine
Truss is moved to the 0# sections of enough positions of Lifting Capacity by walking line mode, and is removed using loop wheel machine, wherein when removing, it then follows
The principle of " first prop up and tear open afterwards, rear branch is first torn open ".
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| CN110345915A (en) * | 2019-07-11 | 2019-10-18 | 中交公路养护工程技术有限公司 | A kind of highway Surveillance of Continuous Beam end bay Cast-in-Situ Segment precompressed detection device and 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 |
| CN110409316A (en) * | 2019-08-15 | 2019-11-05 | 中交路桥华南工程有限公司 | End bay closure construction method |
| CN110468714A (en) * | 2019-08-09 | 2019-11-19 | 中铁七局集团有限公司 | Overlength joins lateral closure construction method after unequal span asymmetric continuous bridge is first indulged |
| CN110629677A (en) * | 2019-09-29 | 2019-12-31 | 中铁大桥局集团有限公司 | Method for erecting section steel beam on pier top short slideway beam |
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| CN110345915A (en) * | 2019-07-11 | 2019-10-18 | 中交公路养护工程技术有限公司 | A kind of highway Surveillance of Continuous Beam end bay Cast-in-Situ Segment precompressed detection device and method |
| CN110345915B (en) * | 2019-07-11 | 2021-04-20 | 中交公路养护工程技术有限公司 | Device and method for detecting prepressing of side-span cast-in-place section of continuous beam of highway bridge |
| 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 |
| CN110468714B (en) * | 2019-08-09 | 2021-04-30 | 中铁七局集团有限公司 | Longitudinal and transverse closure construction method of ultra-long-connection unequal-span asymmetric continuous bridge |
| CN110468714A (en) * | 2019-08-09 | 2019-11-19 | 中铁七局集团有限公司 | Overlength joins lateral closure construction method after unequal span asymmetric continuous bridge is first indulged |
| CN110409316A (en) * | 2019-08-15 | 2019-11-05 | 中交路桥华南工程有限公司 | End bay closure construction method |
| CN110629677A (en) * | 2019-09-29 | 2019-12-31 | 中铁大桥局集团有限公司 | Method for erecting section steel beam on pier top short slideway beam |
| 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 |
| CN111254832A (en) * | 2020-01-21 | 2020-06-09 | 中铁大桥科学研究院有限公司 | Integral hoisting closure method and system for long section of cable-stayed bridge steel girder |
| 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 |
| 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 |
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