CN109837836A - Continuous Bridge incremental launching construction method for correcting error - Google Patents
Continuous Bridge incremental launching construction method for correcting error Download PDFInfo
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- CN109837836A CN109837836A CN201711205224.6A CN201711205224A CN109837836A CN 109837836 A CN109837836 A CN 109837836A CN 201711205224 A CN201711205224 A CN 201711205224A CN 109837836 A CN109837836 A CN 109837836A
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- beam body
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Abstract
The present invention is the Continuous Bridge incremental launching construction method for correcting error designed based on incremental launching method in road and bridge construction field, it mainly include that deviation monitors part and corrects part, its main feature is that in each top of bridge pier setting infrared induction receiver and sliding jack before incremental launching construction, and RF transmitter is being set with No. 1 segment beam body corresponding position.Infrared ray check and correction technology is used during incremental launching construction to be monitored beam body and bridge pier, corrects part using the default sliding jack pair beam body lateral displacement adjustment of pier coping portion.The present invention is not required to increase complicated horse structure, the case where avoiding relying on easy damaged beam body when pushing tow thrust and guiding mechanism adjust beam body jointly, greatly reduce labour, it can detect whether error forms and can be adjusted at once in first time fast accurate, structure design is simple, easy to dismantle, it is not influenced by bridge structure, it is applicable in the incremental launching construction of most of multispan Continuous Bridges, the efficiency of integral construction is improved, shortens the duration.
Description
Technical field
It is related to a kind of method for correcting error about bridge construction incremental launching method, belongs to bridge construction engineering field.
Technical background
Under the paces of science and technology development, occur more and more bridging methods in bridge construction engineering, wherein pushing tow
Method is a kind of system easy to control the quality, occupied ground is few, the efficient bridge superstructure construction method that is not subject to seasonal restrictions, but
It is the construction method that difficulty of construction is larger, required precision is high.Incremental launching method is arranged in advance after the platform along bridge y direction
Place processed, segmented precast beam, and the beam body that prefabricated subsection is completed with construction is unified with longitudinal prestressing muscle, then lead to
Level jack force is crossed, pushing tow goes out prefabricated place forward by beam body, then proceedes to carry out the pre- of next beam sections in precasting yard
System, until construction is completed.Its difficulty of construction is that incremental launching method is to need to calculate by accurate, draws to various pieces
Point, each partial data has clearly stipulate that cannot cannot mostly lack, and deviation less occur just will affect whole section of bridge offset bridge pier
Center line causes safety accident, therefore incremental launching method values deviation processing very much.How effectively, precisely, safely, conveniently entangle
Overgauge becomes related technical personnel at this stage and needs the big problem studied.
Summary of the invention
The present invention provides a kind of method for correcting error of Continuous Bridge incremental launching construction.For in compared with the existing technology, the present invention
The characteristics of be to replace traditional mechanical structure or measuring instrument to detect bits of offset when bridge incremental launching construction using electronic technology
Shifting amount, and the control of data feedback to construction personnel scene, again by being set in advance on bridge pier after relevant calculation is analyzed
The adjustment equipment set is adjusted bridge, be dedicated to after the completion of each across pushing tow can real-time detection offset displacement amount,
Error is strangled to prevent its expansion in the initial stage.
Steps are as follows for Specific construction:
A. according to the constructed bridge pier of bridge construction drawing, and end of the bridge builds Liang Tai processed after pier.It is subsequent in pushing tow mistake to guarantee
Beam body overall stability and equipment antidumping safety in journey, the position of Liang Tai processed is arranged as far as possible must at steadily openr place by end of the bridge
Interim pile foundation is designed under beam platform processed when wanting, prevents soil body sedimentation phenomenon；Setting control in safety area at the rear Liang Tai 50m processed
Platform processed.
B. the simulation of first time incremental launching construction is carried out according to the model that bridge construction drawing establishes prefabricated case beam beam body and bridge pier
Docking, calculates the ideal position of each top of bridge pier support corresponding with box girder body, at this time should be in pier top edge and beam body
Two effective fixed points that can while vertically correspond to, do not interfere with other structures construction again are selected at the corner of bottom respectively.
C., temporary support, slideway slide plate are installed, slideway slide plate is arranged on temporary support on each pier coping portion；Interim branch
Seat side setting sliding jack fixes, and the required each bridge pier of sliding jack configures 4, and effective in above-mentioned pier coping portion
Fixed point setting infrared induction receiver, in order not to destroy the structural strength of bridge pier itself, the bonding of infrared induction receiver
Agent bonding is fixed in fixed point, connects guiding console by communication wire；Pay attention to keeping infrared induction receiver when installation
It is steady, and do not interfere the work of bridge pier other structures, communication wire is wound on as far as possible on the outside of bridge pier.
D. bridge pier carries out precast box girder segment with after the completion of beam platform preparation processed；First led in the front end Liang Tai processed installation one
Beam, and No. 1 segment beam body is poured, No. 1 segment beam body of pushing tow is gone forward, and continues to pour next segment beam body.Wherein No. 1 beam sections
When body Jiao Zhu Quan, at bottom effectively fixed point reserve two with pier coping portion be arranged infrared induction receiver position it is vertically opposite
The small aperture answered；Small open pore size is 3~5cm, and depth is about 2m, no more than 3cm.Reach to No. 1 segment beam body intensity and wants
After asking, demoulding, maintenance, original place carries out prestressed stretch-draw and for the first time mud jacking process；After the completion of all process steps, above-mentioned reserved small
Tapping is coated one layer of thin epoxy resin binder, binds fixed RF transmitter, the installation of RF transmitter cannot be convex
Beam body bottom water plane out, and bond and steadily guarantee that the infrared ray of transmitting is vertically stablized.
Preferably, entirety is formed using splicing mode between the beam body of segment, except remaining external all beam body of No. 1 beam sections
Without reserving small aperture corresponding with top of bridge pier.
E. after the completion of 1, No. 2 segment beam body connects, second of entity simulation incremental launching construction docking is carried out.Pass through jack
The distance of one segment in pushing tow segment 1,2 and nose girder advance, observes beam body advance track.Nose girder is in vacant state at this time, temporarily
Stopping pushing tow makes it stop 1min, calculates nose girder amount of deflection and whether moment, preliminary observation beam body occur biggish lateral displacement.So
3 times repeatedly, by preliminary observation and data are calculated, to push away in beam body forced back with jack reversed pushing tow afterwards
Whether disconnected nose girder and No. 1 segment beam body are connected stabilization, and whether reliable with its Bar Anchorage, whether slideway is steadily aligned.
If problematic after testting, need to reinstall fixed nose girder and slideway, formal incremental launching construction can be carried out if no problem.
F. after the completion of related preparation, start to carry out incremental launching construction to beam body, using pushing tow Special jack to beam body
Pushing tow is carried out, subsequent prefabrication of beam is carried out in pushing tow.When the nose girder pushing tow of beam body leading portion has crossed first bridge pier, beam at this time
Body reaches the temporary support of first top of bridge pier, and temporary support provides beam body support force, when further pushing tow advances, if beam
Body and bridge pier connection generate deviation, then the infrared ray of beam body bottom RF transmitter transmitting will not be with the infrared ray in top of bridge pier
Inducing receiver coincidence is incuded, and infrared induction receiver does not receive the signal of infrared ray injection, applying on console
Worker person is known that bridge beam body is at this time to shift by communication wire, stops incremental launching construction, related personnel to finger at this time
The lateral displacement for measuring beam body offset is set in positioning, then the theoretical rail of correction can be calculated according to nose girder amount of deflection correlation theory data
Mark can start and slide jack progress lateral displacement adjustment on bridge pier.When being adjusted using sliding jack, if beam body pushing tow
Advance and be less than 30m, it is only necessary to four sliding jack on bridge pier that starting is contacted with first segment beam body；If beam body top
It pushes away advance and alreadys exceed 30m, then need to restart to have advanced and be displaced four sliding jack of midpoint bridge pier, totally eight slidings are very heavy
It pushes up while adjusting, to prevent the excessive generation of moment of flexure among bridge beam body from destroying；Hereafter every advance 30m is increased by one group of (four) cunning
Dynamic jack works at the same time.It should be noted that due to receive beam body shift signal when, infrared ray has advanced to infrared
The front end of line inducing receiver, even if infrared ray cannot be retreated again to infrared after sliding jack laterally adjusts beam body position
The corresponding position of line inducing receiver, therefore the unnecessary information for observing the transmission of infrared induction receiver again, directly according to calculating
Data starting sliding jack laterally adjusts, and need not carry out infrared ray check and correction after adjustment again, continues pushing tow beam body to next
A bridge pier is proofreaded next time, and each bridge pier check and correction is primary, so repeats to complete until incremental launching construction.Last beam body soon arrives
When at up to bridge tail design requirement, if still there is deviation, adjusting beam body makes to be overlapped at infrared ray and design requirement, whole at this time
A bridge can determine whether not shift.This method is the position during advanced by monitoring beam body pushing tow on each bridge pier,
Beam body lateral displacement is adjusted, control deviation numerical value prevents its expansion, and carries out check correction again in most rear axle periproct section.
G. incremental launching construction terminates, and removes all infrored equipments.Two small apertures of No. 1 segment soffit need to spray water clearly
It washes, filling concrete mortar envelope is real later.Bridge entirety mud jacking, Luo Liang, equipment are finally carried out again the follow-up works such as withdraws from.
Further illustrate, theory of the invention is: since bridge pier is not provided with the facilities such as guiding correction rack, the present invention is in bridge
The secondary simulation incremental launching construction docking of entity is carried out before beam incremental launching construction, by the way that whether pushing tow tests beam body advance track back and forth three times
Steady straight trip, while the amount of deflection and moment of hanging nose girder at this time are checked, convenient for amendment.It is used during incremental launching construction infrared
Line check and correction technology is monitored beam body and bridge pier；If generating deviation, the default sliding jack pair beam of Deviation Correction Construction pier coping portion
The adjustment of body lateral displacement.
The utility model has the advantages that the present invention be not required to carry out bridge in Deviation Correction Construction to increase the mechanical structure of reaction frame etc. or according to
Box girder body deviation post is corrected by the remote detecting/monitoring such as total station, pushing tow thrust is avoided relying on and guiding mechanism is adjusted jointly
When whole beam body the case where easy damaged beam body, greatly reduce labour, measurement offset is more accurate than traditional technology, due to each bridge
Pier top is designed with corresponding infrared induction receiver, can detect whether error forms and i.e. in first time fast accurate
Quarter can be adjusted, and manual measurement does not go out when will not be too small because of error, cause to continue below after pushing tow Enlarging-Errors to adjustment
Bring difficulty.And directly adopt preset sliding jack for adjusting beam body horizontal offset, more at the same time as the later period
Equipment when permanent support is changed, is killed two birds with one stone；Structure design is simple, easy to dismantle, is not influenced by bridge structure, is applicable in most of
The incremental launching construction of multispan Continuous Bridge improves the efficiency of integral construction, shortens the duration.
Detailed description of the invention
Fig. 1 is each block diagram of pier coping portion.
Fig. 2 is box girder body schematic diagram.
Fig. 3 is ideal closed position schematic diagram when box girder body and pier coping portion are error free.
Fig. 4 is the position of nose girder and 1,2 beam sections when carrying out the simulation of secondary entity in step e.
It is denoted as in figure: 1, temporary support；2, jack is slided；3, infrared induction receiver；4 bridge piers；5, communication electricity
Line；6, deformed bar hole；7, small aperture；8, box girder body；9, intend infrared ray；10, nose girder；11, cushion cap is protected；12, pushing tow
Jack.
Specific embodiment
According to above-mentioned steps, next it is described further for present invention specific implementation.
Example 1: by taking the Span Continuous bridge such as multi-joint of no bent cap as an example, bridge pier is not provided with bent cap, straight by single bridge pier
Line arrangement, top box beam are fixed by hold-down support and bridge pier.
A. according to the constructed bridge pier of design requirement, and end of the bridge builds Liang Tai processed after pier.It is subsequent in pushing tow mistake to guarantee
Beam body overall stability and equipment antidumping safety in journey, the position of Liang Tai processed is arranged as far as possible must at steadily openr place by end of the bridge
Interim pile foundation is designed under beam platform processed when wanting, prevents soil body sedimentation phenomenon；Setting control in safety area in the rear Liang Tai 50m processed
Platform processed.
B. the simulation docking of first time incremental launching construction is carried out according to the model that architectural drawing establishes prefabricated case beam beam body and bridge pier,
The ideal position of each top of bridge pier support corresponding with box girder body is calculated, it at this time should be in pier top edge and beam body bottom sides
Two effective fixed points that can while vertically correspond to, do not interfere with other structures construction again are selected at angle respectively.
C., temporary support, slideway slide plate are installed, slideway slide plate is arranged on temporary support on each pier coping portion；Interim branch
Seat side setting sliding jack fixes；The sliding jack use F-200TL(10 ton) sliding jack, can before and after it is micro-
100mm is adjusted, being arranged in it can laterally free adjusting level sliding.It slides each bridge pier of jack and configures 4, and in above-mentioned bridge
Pier top portion effectively pinpoints setting infrared induction receiver, and in order not to destroy the structural strength of bridge pier itself, infrared induction is connect
It receives the bonding of device binder to be fixed in fixed point, guiding console is connected by communication wire；Pay attention to keeping infrared ray when installation
Inducing receiver it is steady, and do not interfere the work of bridge pier other structures, communication wire is wound on as far as possible on the outside of bridge pier.
D. bridge pier carries out precast box girder segment with after the completion of beam platform preparation processed；First led in the front end Liang Tai processed installation one
Beam, and No. 1 segment beam body is poured, No. 1 segment beam body of pushing tow is gone forward, and continues to pour next segment beam body.Wherein No. 1 beam sections
When body Jiao Zhu Quan, at bottom effectively fixed point reserve two with pier coping portion be arranged infrared induction receiver position it is vertically opposite
The small aperture answered；Small open pore size is 3~5cm, and depth is about 2m, no more than 3cm.Reach to No. 1 segment beam body intensity and wants
After asking, demoulding, maintenance, original place carries out prestressed stretch-draw and for the first time mud jacking process；After the completion of all process steps, above-mentioned reserved small
Tapping is coated one layer of thin epoxy resin binder, binds fixed RF transmitter, the installation of RF transmitter cannot be convex
Beam body bottom water plane out, and bond and steadily guarantee that the infrared ray of transmitting is vertically stablized.Glue is wherein used between the beam body of segment
Spelling mode forms entirety, except remaining external all beam body of No. 1 beam sections do not have to reserve small aperture corresponding with top of bridge pier.
E. after the completion of 1, No. 2 segment beam body connects, second of entity simulation incremental launching construction docking is carried out.By very heavy
The distance for pushing up one segment in pushing tow segment 1,2 and nose girder advance, observes beam body advance track.Nose girder is in vacant state at this time,
Pause pushing tow makes it stop 1min, calculates nose girder amount of deflection and whether moment, preliminary observation beam body occur biggish lateral displacement.
Then 3 times repeatedly, by preliminary observation and data are calculated in beam body forced back with jack reversed pushing tow, with
Infer whether nose girder and No. 1 segment beam body are connected stabilization, whether reliable with its Bar Anchorage, whether steady slideway is right
Together.If problematic after testting, need to reinstall fixed nose girder and slideway；Formal pushing tow can be carried out if no problem to apply
Work.
F. after the completion of related preparation, start to carry out incremental launching construction to beam body, using pushing tow Special jack to beam body
Pushing tow is carried out, subsequent prefabrication of beam is carried out in pushing tow.When the nose girder pushing tow of beam body leading portion has crossed first bridge pier, beam at this time
Body reaches the temporary support of first top of bridge pier, and temporary support provides beam body support force, when further pushing tow advances, if beam
Body and bridge pier connection generate deviation, then the infrared ray of beam body bottom RF transmitter transmitting will not be with the infrared ray in top of bridge pier
Inducing receiver coincidence is incuded, and infrared induction receiver does not receive the signal of infrared ray injection, applying on console
Worker person is known that bridge beam body is at this time to shift by communication wire, stops incremental launching construction, related personnel to finger at this time
The lateral displacement for measuring beam body offset is set in positioning, then the theoretical rail of correction can be calculated according to nose girder amount of deflection correlation theory data
Mark can start and slide jack progress lateral displacement adjustment on bridge pier.When being adjusted using sliding jack, if beam body is advanced
Displacement is less than 30m, it is only necessary to four sliding jack on bridge pier that starting is contacted with first segment beam body；If beam body position
It sets and alreadys exceed 30m, then need to restart to have advanced and be displaced four sliding jack of midpoint bridge pier, totally eight sliding jack are same
When adjust, to prevent excessive the generations destruction of moment of flexure among bridge beam body；Hereafter every advance 30m is increased by one group of (four) sliding thousand
Jin top work.It should be noted that due to receive beam body shift signal when, infrared ray has advanced to infrared induction and has connect
The front end of device is received, even if infrared ray cannot be retreated to infrared induction again and be connect after sliding jack laterally adjusts beam body position
The corresponding position of device is received, therefore the unnecessary information for observing the transmission of infrared induction receiver again, directly according to calculating data starting
Sliding jack laterally adjusts, and need not carry out infrared ray check and correction after adjustment again, continue pushing tow beam body to next bridge pier into
Row is proofreaded next time, and each bridge pier check and correction is primary, so repeats to complete until incremental launching construction.Last beam body soon reaches bridge tail and sets
When counting at requirement, if still there is deviation, adjusting beam body makes to be overlapped at infrared ray and design requirement, and entire bridge can at this time
Judgement does not shift.This method is the position during advanced by monitoring beam body pushing tow on each bridge pier, adjusts beam body
Lateral displacement, control deviation numerical value prevents its expansion, and carries out check correction again in most rear axle periproct section.
G. incremental launching construction terminates, and removes all infrored equipments.Two small apertures of No. 1 segment soffit need to spray water clearly
It washes, filling concrete mortar envelope is real later.Bridge entirety mud jacking, Luo Liang, equipment are finally carried out again the follow-up works such as withdraws from.
Above-mentioned specific embodiment, which is selected, is used as preferred example of the present invention without the multi-joint equal T Continuous Bridge structure of bent cap, be for
The more concise narration features of the present invention, it is not limited to which its rights protection scope, all are using the present invention as the aobvious of core
And the change being clear to is all within the scope of the present invention.
Claims (7)
1. Continuous Bridge incremental launching construction method for correcting error, which comprises the following steps:
A. first according to the constructed bridge pier of bridge construction drawing, end of the bridge builds Liang Tai processed, safety at the rear Liang Tai 50m processed after pier
Console is arranged in area；
B. prefabricated case beam beam body and bridge pier model are established on computers according to bridge construction drawing, carry out first time incremental launching construction
Simulation docking, calculates the ideal position of each top of bridge pier support corresponding with box girder body, in top of bridge pier edge and beam body bottom
Portion's edge selects two effective fixed points that can while vertically correspond to, do not interfere with other structures construction again respectively；
C., temporary support, slideway slide plate are installed, slideway slide plate is arranged on temporary support on each pier coping portion；Temporary support
Setting sliding jack in side simultaneously fixes, and effectively pinpoints setting infrared induction receiver in above-mentioned pier coping portion；
D. nose girder is installed in the front end Liang Tai processed, pours that No. 1 segment beam body is fixed thereto, and No. 1 segment beam body of pushing tow is gone forward, and continues to pour
Next segment beam body, after No. 1 segment beam body intensity reaches requirement, demoulding, maintenance, original place carries out prestressed stretch-draw and for the first time
Mud jacking process；After the completion of all process steps, fixed RF transmitter is binded at effective fixed point；
E. after the construction for completing 1, No. 2 segment beam body, second of entity simulation incremental launching construction docking is carried out；Pass through pushing tow jack
The distance of one segment in pushing tow segment 1,2 and nose girder advance, observes beam body advance track；Nose girder is in vacant state at this time, temporarily
Stopping pushing tow makes it stop 1min, calculates nose girder amount of deflection and whether moment, preliminary observation beam body occur biggish lateral displacement；So
3 times repeatedly, by preliminary observation and data are calculated in beam body forced back with pushing tow jack reversed pushing tow afterwards,
Whether reliable with its Bar Anchorage to infer whether nose girder and No. 1 segment beam body are connected stabilization, whether slideway is steady right
Together；If problematic after testting, need to reinstall fixed nose girder and slideway, formal pushing tow can be carried out if no problem and is applied
Work；
F. after the completion of related preparation, start to carry out incremental launching construction to beam body, carry out pushing tow using pushing tow jack pair beam body,
Subsequent prefabrication of beam is carried out in pushing tow；If infrared induction receiver detects beam body and shifts, stop incremental launching construction,
Related personnel measures the lateral displacement of beam body offset to designated position, then can be calculated according to nose girder amount of deflection correlation theory data
It rectifies a deviation out theory locus, can start and slide jack on bridge pier and carry out lateral displacement adjustment；
G. incremental launching construction terminates, and removes all infrored equipments；Two small apertures of No. 1 segment soffit need spraying-rinsing, it
Filling concrete mortar envelope is real afterwards；Finally carrying out bridge entirety mud jacking, Luo Liang, equipment again withdraws from follow-up work.
2. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that in step c, required cunning
The dynamic each bridge pier of jack configures 4, is transversely mounted on pier coping portion temporary support two sides.
3. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that infrared in step c and d
Line inducing receiver and RF transmitter epoxy adhesive bind respectively to be fixed in corresponding effectively fixed point, infrared ray
Transmitter will bond steadily, and the installation of RF transmitter cannot protrude beam body bottom water plane；Infrared induction receiver is logical
Cross communication wire connection guiding console；Communication wire is wound on the outside of bridge pier.
4. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that in step d, each beam sections
Entirety is formed using splicing mode between body.
5. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that in step f, using cunning
When dynamic jack adjustment, if beam body pushing tow, which advances, is less than 30m, it is only necessary to four on bridge pier that starting is contacted with first segment beam body
A sliding jack；If the advance of beam body pushing tow alreadys exceed 30m, then needs to restart to have advanced and be displaced the four of midpoint bridge pier
A sliding jack, totally eight sliding jack adjust simultaneously, to prevent the excessive generation of moment of flexure among bridge beam body from destroying；Hereafter
Every advance 30m is increased by one group of (four) sliding jack and works at the same time.
6. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that in step f, infrared ray prison
The method for surveying beam body offset are as follows: right above No. 1 segment beam body pushing tow to bridge pier, if beam body and bridge pier connection generate deviation,
The infrared ray of beam body bottom RF transmitter transmitting will not be overlapped with the infrared induction receiver in top of bridge pier to be incuded,
Infrared induction receiver does not receive the signal of infrared ray injection, and the construction personnel on console is received red by communication wire
The signal of outside line check and correction failure.
7. Continuous Bridge incremental launching construction method for correcting error according to claim 1, which is characterized in that in step f, use sliding
The method that jack is adjusted are as follows: if continuing incremental launching construction after console receives the successful signal of infrared ray check and correction；If not yet
Have, is then directly laterally adjusted according to calculating data starting sliding jack, infrared ray check and correction need not be carried out after adjustment again, after
Continuous pushing tow beam body to next bridge pier is proofreaded next time, and each bridge pier check and correction is primary, is so repeated until incremental launching construction is complete
At.
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| CN112227212A (en) * | 2020-10-10 | 2021-01-15 | 招商局重庆交通科研设计院有限公司 | Assembled bridge construction equipment |
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| CN113774813A (en) * | 2021-09-23 | 2021-12-10 | 中国建筑土木建设有限公司 | Traction deviation rectifying equipment convenient for installing large-section steel truss box girder |
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| CN111549669A (en) * | 2020-04-30 | 2020-08-18 | 中冶(上海)钢结构科技有限公司 | Six-direction adjusting device for bridge and construction method |
| CN112227212A (en) * | 2020-10-10 | 2021-01-15 | 招商局重庆交通科研设计院有限公司 | Assembled bridge construction equipment |
| CN112227212B (en) * | 2020-10-10 | 2021-07-20 | 招商局重庆交通科研设计院有限公司 | Assembled bridge construction equipment |
| CN113322832A (en) * | 2021-07-13 | 2021-08-31 | 广西北投公路建设投资集团有限公司 | Bridge incremental launching construction technology |
| CN113774813A (en) * | 2021-09-23 | 2021-12-10 | 中国建筑土木建设有限公司 | Traction deviation rectifying equipment convenient for installing large-section steel truss box girder |
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