CN107724254A - The synchronization of jacking up of construction of bridge T beam changes construction method with making - Google Patents
The synchronization of jacking up of construction of bridge T beam changes construction method with making Download PDFInfo
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- CN107724254A CN107724254A CN201710730975.3A CN201710730975A CN107724254A CN 107724254 A CN107724254 A CN 107724254A CN 201710730975 A CN201710730975 A CN 201710730975A CN 107724254 A CN107724254 A CN 107724254A
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
A kind of construction of bridge T beam synchronization of jacking up changes construction method with making, and comprises the following steps：Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, stress preanalysis and calculating are carried out.The present invention top lifting power and top lifting height in work progress carry out dual control, based on the highness change between total top lifting height and summit, supplemented by top lift；The preliminary foundation jacked using theoretical top lifting masterpiece as box beam, when close to theoretical top lifting power, take that micro, jack-up method slowly jacks step by step；Fall beam time stage, slowly fall after rise；Tightly monitor the measured stress and deformation at each measuring point, supervision construction；Once there are displacement or overstressing or abnormal conditions, stop construction immediately, search reason in time；Before falling beam, each T soffit and platform cap are monitored according to design requirement（Bracket）Clear height between top surface, so as to ensure that the reliability of construction, reduce difficulty of construction.
Description
Technical field
The present invention relates to technical field of bridge construction, specially a kind of construction of bridge T beam synchronization of jacking up changes construction party with making
Method.
Background technology
After long-term use, former laminated rubber bearing shearing change, aging, cracking disease are serious, lose it for domestic bridge
Using concrete rubbish be present in function and beam-ends expansion joint, bridge span structure is caused in the presence of the uniform temperature difference, mobile load, longitudinal direction
Deformation suffers restraints.To ensure that superstructure can be freely under the effect of the factors such as load, temperature change and concrete shrinkage and creep
Deformation, makes the actual loading of structure, deformation meet design idea, and protects beam-ends, platform cap, bracket injury-free, thus
Need to change all bearings at both sides end bay abutment and mid-span both sides bracket.
In the prior art, CN105297643A discloses a kind of hollow slab type Bridge Support Replacement method, the replacing options
Including：Calculate jacking displacement：Each cored slab undersetting theory stress size is calculated, according to the modulus of elasticity and stress surface of bearing
Product calculates deflection of each bearing under bridge Gravitative Loads, and wherein maximum deformation quantity and the lowest construction needed for replacing time is high
Spend sum and jack displacement for the setting of cored slab；Equipment is installed：One jack of each corresponding installation of bearing, according to each hollow
The different top lift of plate, corresponding jack is arranged in cored slab with the girt strip of one end, and cored slab is arranged in bearing
Same length direction, each jack is arranged on the same width of cored slab, and displacement meter is arranged in the same one end of cored slab
Two bearings among, and with jack on the same width of cored slab.
CN104005342A discloses a kind of bridge deformation dynamic synchronization jacking compensation method, and the compensation method includes following
Step：Using main control computer, sub- pump and the mutually coordinated work of height sensor, and field monitoring data are combined, using more points
Prosecutor formula, to parameters such as pressure value, lifting height, load differences, monitored using electronic system, it is ensured that multiple security protection, LCD
Screen display integral construction situation.
CN103410104A discloses a kind of bearing replacement method of overhead road of city, for the overhead column within one
The bearing of position is changed, and the replacing options provide unit, and the unit includes setting gradually from bottom to top
All-hydraulic load transportation equipment, load-sharing girder, jacking apparatus, slewing equipment, crossbeam and synchronous jacking system, the water of the crossbeam
Plane side is provided with operating platform.
However, in construction is changed, beam body jacking and bearing replacement difficulty of construction are very big, because clear height limits at bearing,
Can not be directly in beam rib bottom surface and platform cap（Bracket）Lifting Equipment is directly disposed between top surface, especially at mid-span bracket, under bridge
For navigable river, and structure stress is complicated at bracket, space is very narrow and small, and difficulty of construction is bigger, particular without synchronous to stress
Accurate monitoring, easily forms beam-ends, platform cap, the local damage of bracket, therefore, it is proposed that a kind of construction of bridge T beam synchronization of jacking up with
Make and change construction method.
The content of the invention
Construction method is changed with making it is an object of the invention to provide the synchronization of jacking up of construction of bridge T beam, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides following technical scheme：A kind of construction of bridge T beam synchronization of jacking up is applied with making replacing
Work method, comprises the following steps：Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point,
Carry out stress preanalysis and calculating, and according to construction experience, form the Reference Stress of each stress point；Then according to each stress point
Jacking displacement at Reference Stress and each girder of direction across bridge, the top lift formed at each girder and jacking displacement；Before jacking,
Mount stress sensor and displacement transducer at each girder of Reference Stress and direction across bridge of each stress point, and gather static data；
The examination top of small stroke is carried out, behind repeatedly examination top, when each concrete numerical value is in term of reference, is formally jacked；Jacking
Process should use classification jacking, and the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement
Degree, maximum displacement and jacking speed to every one-level stroke are controlled；During jacking, exceed ginseng when there is each concrete numerical value
When in the range of examining, system automatic alarm, jacking process stops；After adjusted processing, system self-test again；When collection static data is equal
When in term of reference, jacking process continues, but jacks speed and the reduction of corresponding stroke；After the completion of every grade of jacking, it is
System self-test again；If a few minutes appearance without exception is stood, and when collection static data is in term of reference, next stage
Jacking process continues；The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
Preferably, need to carry out the stress etc. of whole movement locus, overall posture, structure during the bridge jacking
Monitoring in real time.
Preferably, the monitoring content includes bridge entirety posture, displacement, structural stress etc., and monitoring work will be through
Jack, hold lotus and fall in the whole work progress of beam.
Preferably, during the jacking, the maximum displacement per one-level stroke is controlled within 1mm, jacks speed control
It is more steady within 3 minutes 1mm, after jacking in place, automatic locking jack, not oil return are controlled by computer.
Preferably, need to be monitored the superstructure of bridge during the jacking, the particular content of monitoring is each
The vertical and vertical, horizontal displacement of beam body at Jacking point, the stress at each end of main beam diaphragm plate top, bottom and floorings；End bay T
The development of diagonal crack near beam beam rib Vertical Cracks disease and beam-ends；Visual examination prison is carried out to expansion joint, deck paving
Control, and the dilatation situation at expansion joint.
Compared with prior art, the beneficial effects of the invention are as follows：Top lifting power and top lifting height carry out dual control in work progress,
Based on highness change between total top lifting height and summit, supplemented by top lift；Jacked using theoretical top lifting masterpiece as box beam
Preliminary foundation, when close to theoretical top lifting power, take that micro, jack-up method slowly jacks step by step；Fall beam time stage, slowly return
Fall；Tightly monitor the measured stress and deformation at each measuring point, supervision construction；Once there is displacement or overstressing or exception
Situation, stop construction immediately, search reason in time；Before falling beam, each T soffit and platform cap are monitored according to design requirement（Bracket）
Clear height between top surface, so as to ensure that the reliability of construction, reduce difficulty of construction.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Referring to Fig. 1, the present invention provides a kind of technical scheme：The synchronization of jacking up of construction of bridge T beam changes construction method with making, bag
Include following steps：Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, it is pre- to carry out stress
Analysis and calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress of each stress point and
Jacking displacement at each girder of direction across bridge, the top lift formed at each girder and jacking displacement；Before jacking, in each stress point
Mount stress sensor and displacement transducer at Reference Stress and each girder of direction across bridge, and gather static data；Carry out small stroke
Examination top, through repeatedly examination top after, when each concrete numerical value is in term of reference, formally jacked；Jacking process should use
Classification jacking, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level
The maximum displacement of stroke and jacking speed are controlled；During jacking, when there is each concrete numerical value in term of reference,
System automatic alarm, jacking process stop；After adjusted processing, system self-test again；When collection static data is in referring to model
When enclosing interior, jacking process continues, but jacks speed and the reduction of corresponding stroke；Every grade jacking after the completion of, system again from
Inspection；If stand a few minutes appearance without exception, and when collect static data be in term of reference when, next stage jack process after
It is continuous to carry out；The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
Embodiment one：
Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, carry out stress preanalysis and
Calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress and direction across bridge of each stress point
Jacking displacement at each girder, the top lift formed at each girder and jacking displacement；, should in the reference of each stress point before jacking
Mount stress sensor and displacement transducer at power and each girder of direction across bridge, and gather static data；The examination top of small stroke is carried out,
Behind repeatedly examination top, when each concrete numerical value is in term of reference, formally jacked；Jacking process should use classification top
Rise, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level stroke
Maximum displacement and jacking speed are controlled；During jacking, when there is each concrete numerical value in term of reference, system is certainly
Dynamic alarm, jacking process stop；After adjusted processing, system self-test again；When collection static data is in term of reference,
Jacking process continues, but jacks speed and the reduction of corresponding stroke；After the completion of every grade of jacking, system self-test again；Stand
If a few minutes appearance without exception, and when collection static data is in term of reference, next stage jacking process continues；
The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
Embodiment two：
In embodiment one, along with following processes：
Need to monitor the stress etc. of whole movement locus, overall posture, structure in real time during bridge jacking.
Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, carry out stress and divide in advance
Analysis and calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress and horizontal stroke of each stress point
Bridge is to the jacking displacement at each girder, the top lift formed at each girder and jacking displacement；Before jacking, in the ginseng of each stress point
Mount stress sensor and displacement transducer at stress and each girder of direction across bridge are examined, and gathers static data；Carry out small stroke
Examination top, behind repeatedly examination top, when each concrete numerical value is in term of reference, formally jacked；Jacking process, which should use, divides
Level jacking, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level row
The maximum displacement of journey and jacking speed are controlled；Wherein, needed during bridge jacking to whole movement locus, overall appearance
State, the stress etc. of structure are monitored in real time；During jacking, when there is each concrete numerical value in term of reference, system
Automatic alarm, jacking process stop；After adjusted processing, system self-test again；When collection static data is in term of reference
When, jacking process continues, but jacks speed and the reduction of corresponding stroke；After the completion of every grade of jacking, system self-test again；It is quiet
If put a few minutes appearance without exception, and when collect static data be in term of reference when, next stage jacking process continue into
OK；The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
Embodiment three：
In embodiment two, along with following processes：
Monitoring content includes bridge entirety posture, displacement, structural stress etc., and monitoring work will be through jacking, hold lotus and Luo Liang
Whole work progress in.
Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, carry out stress and divide in advance
Analysis and calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress and horizontal stroke of each stress point
Bridge is to the jacking displacement at each girder, the top lift formed at each girder and jacking displacement；Before jacking, in the ginseng of each stress point
Mount stress sensor and displacement transducer at stress and each girder of direction across bridge are examined, and gathers static data；Carry out small stroke
Examination top, behind repeatedly examination top, when each concrete numerical value is in term of reference, formally jacked；Jacking process, which should use, divides
Level jacking, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level row
The maximum displacement of journey and jacking speed are controlled；Wherein, needed during bridge jacking to whole movement locus, overall appearance
State, the stress etc. of structure are monitored in real time；Wherein, monitoring content includes bridge entirety posture, displacement, structural stress etc., prison
Control work will be through jacking, hold lotus and fall in the whole work progress of beam；During jacking, exceed when there is each concrete numerical value
When in term of reference, system automatic alarm, jacking process stops；After adjusted processing, system self-test again；When collection static data
When being in term of reference, jacking process continues, but jacks speed and the reduction of corresponding stroke；After the completion of every grade of jacking,
System self-test again；If a few minutes appearance without exception is stood, and when collection static data is in term of reference, it is next
Level jacking process continues；The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
Example IV：
In embodiment three, along with following processes：
During jacking, the maximum displacement per one-level stroke is controlled within 1mm, jacking speed control within 3 minutes 1mm more
To be steady, after jacking in place, automatic locking jack, not oil return are controlled by computer.
Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, carry out stress and divide in advance
Analysis and calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress and horizontal stroke of each stress point
Bridge is to the jacking displacement at each girder, the top lift formed at each girder and jacking displacement；Before jacking, in the ginseng of each stress point
Mount stress sensor and displacement transducer at stress and each girder of direction across bridge are examined, and gathers static data；Carry out small stroke
Examination top, behind repeatedly examination top, when each concrete numerical value is in term of reference, formally jacked；Jacking process, which should use, divides
Level jacking, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level row
The maximum displacement of journey and jacking speed are controlled；Wherein, needed during bridge jacking to whole movement locus, overall appearance
State, the stress etc. of structure are monitored in real time；Wherein, monitoring content includes bridge entirety posture, displacement, structural stress etc., prison
Control work will be through jacking, hold lotus and fall in the whole work progress of beam；During jacking, exceed when there is each concrete numerical value
When in term of reference, system automatic alarm, jacking process stops；After adjusted processing, system self-test again；During jacking,
Maximum displacement per one-level stroke is controlled within 1mm, and jacking speed control is more steady within 3 minutes 1mm, and jacking is in place
Afterwards, automatic locking jack, not oil return are controlled by computer；When collection static data is in term of reference, process is jacked
Continue, but jack speed and the reduction of corresponding stroke；After the completion of every grade of jacking, system self-test again；If stand a few minutes
Appearance without exception, and when collection static data is in term of reference, next stage jacking process continues；Jacking is all
After the completion of decline process, be also monitored simultaneously, and adjustment in time handle.
Embodiment five：
In example IV, along with following processes：
Need to be monitored the superstructure of bridge during jacking, the particular content of monitoring is the perpendicular of beam body at each Jacking point
To and vertical, horizontal displacement, at the top of each end of main beam diaphragm plate, the stress of bottom and floorings；End bay T beam beam ribs Vertical Cracks disease
The development of diagonal crack near evil and beam-ends；To stretching for expansion joint, deck paving progress visual examination monitoring, and expansion joint
Compression deformation situation.
Preanalysis and calculating are carried out to the jacking displacement at each girder first；Then to each stress point, carry out stress and divide in advance
Analysis and calculate, and according to construction experience, form the Reference Stress of each stress point；Then according to the Reference Stress and horizontal stroke of each stress point
Bridge is to the jacking displacement at each girder, the top lift formed at each girder and jacking displacement；Before jacking, in the ginseng of each stress point
Mount stress sensor and displacement transducer at stress and each girder of direction across bridge are examined, and gathers static data；Carry out small stroke
Examination top, behind repeatedly examination top, when each concrete numerical value is in term of reference, formally jacked；Jacking process, which should use, divides
Level jacking, the stroke and jacking speed for determining jackings at different levels are calculated according to fixed each girder jacking displacement, to every one-level row
The maximum displacement of journey and jacking speed are controlled；Wherein, needed during bridge jacking to whole movement locus, overall appearance
State, the stress etc. of structure are monitored in real time；Wherein, monitoring content includes bridge entirety posture, displacement, structural stress etc., prison
Control work will be through jacking, hold lotus and fall in the whole work progress of beam；During jacking, exceed when there is each concrete numerical value
When in term of reference, system automatic alarm, jacking process stops；After adjusted processing, system self-test again；During jacking,
Maximum displacement per one-level stroke is controlled within 1mm, and jacking speed control is more steady within 3 minutes 1mm, and jacking is in place
Afterwards, automatic locking jack, not oil return are controlled by computer；Need to be monitored the superstructure of bridge during jacking,
The particular content of monitoring is the vertical and vertical, horizontal displacement of beam body at each Jacking point, at the top of each end of main beam diaphragm plate, bottom and
The stress of floorings；The development of diagonal crack near end bay T beam beam rib Vertical Cracks diseases and beam-ends；To expansion joint, bridge floor
Mat formation and carry out visual examination monitoring, and the dilatation situation at expansion joint；When collection static data is in term of reference,
Jacking process continues, but jacks speed and the reduction of corresponding stroke；After the completion of every grade of jacking, system self-test again；Stand
If a few minutes appearance without exception, and when collection static data is in term of reference, next stage jacking process continues；
The decline process after being fully completed is jacked, is also monitored simultaneously, and adjustment in time is handled.
In the present invention, beam body jacking, the main construction procedure of bearing replacement are：Preparation of construction → arrangement jacking the strong point →
Jack and synchronous facility → setting monitoring system → traffic control, limiting vehicle speed → in batches by pier synchronization of jacking up beam body are installed
→ the prefabricated temporary support of installation after jacking is in place → falls beam → bearing replacement construction → synchronization of jacking up again → to put for the first time
Put bearing → fall beam.
Top lifting power and top lifting height carry out dual control in work progress, with the highness change between total top lifting height and summit
Based on, supplemented by top lift；The preliminary foundation jacked using theoretical top lifting masterpiece as box beam, when close to theoretical top lifting power, take micro-
Amount, jack-up method slowly jacks step by step；Fall beam time stage, slowly fall after rise；Tightly monitor the measured stress at each measuring point and deformation
Situation, supervision construction；Once there are displacement or overstressing or abnormal conditions, stop construction immediately, search reason in time；Fall beam
Before, monitor each T soffit and platform cap according to design requirement（Bracket）Clear height between top surface, so as to ensure that the reliable of construction
Property, reduce difficulty of construction.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments in the case where not departing from the principle of the present invention and design, replace by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. the synchronization of jacking up of construction of bridge T beam changes construction method with making, comprise the following steps：First to the jacking displacement at each girder
Carry out preanalysis and calculating；Then stress preanalysis and calculating are carried out to each stress point, and according to construction experience, formed respectively by
The Reference Stress in force；Then according to the jacking displacement at the Reference Stress of each stress point and each girder of direction across bridge, each master is formed
Liang Chu top lift and jacking displacement；Before jacking, the mount stress at each girder of Reference Stress and direction across bridge of each stress point
Sensor and displacement transducer, and gather static data；The examination top of small stroke is carried out, behind repeatedly examination top, each concrete numerical value is equal
When in term of reference, formally jacked；Jacking process is jacked using classification, and displacement is jacked according to fixed each girder
The stroke for determining jackings at different levels and jacking speed are calculated, the maximum displacement and jacking speed to every one-level stroke are controlled；Top
During rising, when there is each concrete numerical value in term of reference, system automatic alarm, jacking process stops；Adjusted place
After reason, system self-test again；When collection static data is in term of reference, jacking process continues, but jacks speed
And corresponding stroke is reduced；After the completion of every grade of jacking, system self-test again；If a few minutes appearance without exception is stood, and when collection
When static data is in term of reference, next stage jacking process continues；The decline process after being fully completed is jacked,
It is monitored simultaneously, and adjustment in time is handled.
2. construction of bridge T beam synchronization of jacking up according to claim 1 changes construction method with making, it is characterised in that：The bridge
Back needs to monitor the stress etc. of whole movement locus, overall posture, structure in real time during rising.
3. construction of bridge T beam synchronization of jacking up according to claim 2 changes construction method with making, it is characterised in that：The prison
Controlling content includes bridge entirety posture, displacement, structural stress etc., and monitoring work will be through jacking, hold lotus and fall the whole of beam
In work progress.
4. construction of bridge T beam synchronization of jacking up according to claim 1 changes construction method with making, it is characterised in that：The top
During rising, the maximum displacement per one-level stroke is controlled within 1mm, and jacking speed control is more flat within 3 minutes 1mm
Surely, after jacking in place, automatic locking jack, not oil return are controlled by computer.
5. construction of bridge T beam synchronization of jacking up according to claim 1 changes construction method with making, it is characterised in that：The top
Need to be monitored the superstructure of bridge during rising, the particular content of monitoring for beam body vertical at each Jacking point and
Vertical, horizontal displacement, the stress at each end of main beam diaphragm plate top, bottom and floorings；End bay T beam beam rib Vertical Cracks diseases and
The development of diagonal crack near beam-ends；Visual examination monitoring, and the flexible change at expansion joint are carried out to expansion joint, deck paving
Shape situation.
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| CN110904862A (en) * | 2018-10-18 | 2020-03-24 | 石家庄铁道大学 | Railway bridge beam replacing assembly process and beam replacing process |
| CN110644381A (en) * | 2019-10-12 | 2020-01-03 | 杭州交投科技工程有限公司 | Bridge jacking method |
| CN111765997A (en) * | 2020-07-22 | 2020-10-13 | 中铁二十三局集团第二工程有限公司 | Incremental launching beam monitoring and controlling construction method |
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Application publication date: 20180223 |