CN106930198A - The processing method of modular bridge beam support and application - Google Patents
The processing method of modular bridge beam support and application Download PDFInfo
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- CN106930198A CN106930198A CN201710228285.8A CN201710228285A CN106930198A CN 106930198 A CN106930198 A CN 106930198A CN 201710228285 A CN201710228285 A CN 201710228285A CN 106930198 A CN106930198 A CN 106930198A
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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Abstract
A kind of processing method of the modular bridge beam support processed the invention discloses disease bearing to rib beam type bridge or box beam formula bridge or board-like bridge it is characterized in that it include (1) installing jack-up system, (2) jacking, (3) bearing treatment, (4) unloading fall beam step；For board-like or pot rubber bearing the treatment under rib beam type bridge or each beam of box beam formula bridge or board-like bridge or plate；The present invention arranges a jacking method for jack using at interval of 1~2 bearing, and jack quantity can reduce 50 ﹪ or so, greatly reduce construction cost, improve economic benefit；From for structure stress angle, using the mechanics principle for being capable of Transfer of Shear between adjacent two panels beam, plate, in bridge lateral symmetrical arrangement jacking load, it is ensured that the tension that floorings occur is smaller or occurs without tension, makes bridge structure uniform force.
Description
Technical field
The present invention relates to a kind of combined bridge, the processing method of specifically a kind of modular bridge beam support and should
With the combined type that more particularly to a kind of disease bearing to rib beam type bridge or box beam formula bridge or board-like bridge is processed
The processing method of bridge pad and application.
Background technology
According to incompletely statistics, the Chinese seat of existing highway bridge quantity about more than 800,000, the bridge for putting into operation every year about more than 10,000
Seat.So huge quantity, while our convenient traffic are brought, also generates many urgent problems, its jackshaft
The bearing problem of beam is the most thorny issue.
Bearing is the important feature part for connecting bridge superstructure and substructure, is subject to act on superstructure
Various loads, and pier is passed it to, meanwhile, under load, temperature, concrete shrinkage and creep effect, adapt to top knot
The corner of structure and displacement.Relevant investigation display：Due to the aspects such as design, processing and manufacturing, construction and maintenance, conventional public affairs
There is serious problem of aging in the rubber support under road and bridge beam each beam, plate, often just occur bearing in using 3~5 years and take off
The diseases such as empty, detrusion is excessive, the convex deformation of intermediate gelatine layer drum.Bearing as the most important load transfer device of bridge, its normal fortune
Row directly decides the service life of bridge top and the bottom structure, to bridge structure and traffic safety important.Therefore, prop up
The Disease Processing of seat needs urgently to be resolved hurrily.
Currently, the treatment to disease bearing is generally all using the method for bearing replacement.Existing bearing replacement method is equal
It is that bearing replacement will be again carried out after combination beam, plate integral jacking, but the quantity of the method requirement jack and the quantity of bearing
It is identical, therefore, substantial amounts of human and material resources, financial resources need to be expended, the shortcomings of economical, ageing poor.
For example, Cheng Wen is far away from its document " bridge integral jacking replacing time construction technology "（Architecture/engineering, 2007
16 phases, page 105,87）Open debate application of the integral jacking technology in Bridge Support Replacement.The technology is with cored slab
Example is illustrated, and for jack arrangement, in single span, laterally two ultra-thin jack are arranged in each cored slab one end, that is,
Say each bearing one jack of correspondence.Jack with this arrangement no doubt can replacing time, but, the use of jack
Quantity is more, economy, ageing poor.
The content of the invention
Enter it is an object of the invention to provide a kind of disease bearing to rib beam type bridge or box beam formula bridge or board-like bridge
The processing method of the modular bridge beam support of row treatment and application.
The present invention adopts the following technical scheme that and realizes its goal of the invention, a kind for the treatment of side of modular bridge beam support
Method, it comprises the following steps：
(1) jack-up system is installed：Jack-up system includes hydraulic jack, displacement meter and control device；Hydraulic jack is arranged on
Near the bearing of beam or plate one end, and it is arranged on the same width of each beam or plate；Displacement meter is arranged in each beam or plate
Bottom surface, and be arranged on the same width of each beam or plate；
For board-like bridge, a hydraulic jack is respectively arranged at the beam rib position on the outside of its side plate, it is then every to bridge center
1~2, interval bearing arranges a hydraulic jack, and is arranged symmetrically centered on bridge longitudinal axis or almost symmetry cloth
Put；Displacement meter is arranged on the longitudinal axis of each plate；
For beam type bridge, a hydraulic jack is respectively arranged at the beam rib of its side bar or diaphragm position, then in bridge
A hydraulic jack is arranged in centre at interval of 1~2 bearing, and is arranged symmetrically or almost symmetry centered on bridge longitudinal axis
Arrangement；Displacement meter is disposed adjacent under the beam rib of bearing；
The across footpath of combined bridge of the present invention is less than or equal to 50m.
For freely-supported bridge, the corresponding position of another bridge or plate is also disposed with hydraulic jack to the present invention on same bridge pier
Top and displacement meter.
In full-bridge integral jacking, hydraulic jack and displacement meter under all beams or plate are arranged in the present invention
On same width and on same longitudinal direction.
(2) jacking：Under the control device control of jack-up system, each hydraulic jack is pushed up step by step simultaneously by jacking displacement
Rise, ㎜~1.2 ㎜ of each jacking 0.8, the displacement difference between adjacent beams or plate is once observed per jacking, it is ensured that the position of its plate or beam
Move difference and be no more than 0.2 ㎜~0.3 ㎜, the displacement of each hydraulic jack is controlled by the displacement meter under correspondence beam or plate,
Until the bearing under each beam or plate departs from the bottom surface of beam or plate；
For freely-supported bridge, the jacking displacement difference of adjacent two panels beam or plate is no more than 0.1 ㎜ to the present invention on same bridge pier.
(3) bearing treatment：After completing lifting operation, temporary support is installed near each bearing, and according to the disease journey of bearing
Degree carries out come to nothing treatment or replacing treatment to the disease bearing under each beam or plate；
(4) unload beam：After completing the Disease Processing of bearing, by (2) lifting operation reverse procedure unloads load hydraulic thousand step by step with step
Jin top, makes each bearing be brought into close contact with corresponding beam or plate；
Repeat step (1)~(4), carry out down the treatment of a piece of beam or plate undersetting.
A kind of processing method of modular bridge beam support as described above is in rib beam type bridge or box beam formula bridge or board-like
Applied in bridge, i.e., for the board-like or basin type rubber under rib beam type bridge or each beam of box beam formula bridge or board-like bridge or plate
The treatment of bearing.
Due to using above-mentioned technical proposal, the present invention preferably realizes goal of the invention, using at interval of 1~2 bearing
One jacking method of jack of arrangement, jack quantity can reduce 50 ﹪ or so, greatly reduce construction cost, improve through
Ji benefit；From for structure stress angle, using the mechanics principle for being capable of Transfer of Shear between adjacent two panels beam, plate, in bridge
The symmetrical jacking load of lateral arrangement, it is ensured that the tension that floorings occur is smaller or occurs without tension, receives bridge structure
Power is uniform.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2；
Fig. 3 is the structural representation of the embodiment of the present invention 3；
Fig. 4 is the structural representation of the embodiment of the present invention 4；
Fig. 5 is the structural representation of the embodiment of the present invention 5；
Fig. 6 is the structural representation of the embodiment of the present invention 6；
Fig. 7 is the structural representation of the embodiment of the present invention 7.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
Embodiment 1：
A kind of processing method of modular bridge beam support, it comprises the following steps：
(1) jack-up system is installed：Jack-up system includes hydraulic jack 1, displacement meter 2 and control device；Hydraulic jack 1 is pacified
Near the bearing of beam or plate one end, and it is arranged on the same width of each beam or plate；Displacement meter 2 is arranged in each beam
Or the bottom surface of plate, and be arranged on the same width of each beam or plate；
For board-like bridge, a hydraulic jack 1 is respectively arranged at the beam rib position in its outside of side plate 4, then to bridge center
A hydraulic jack 1 is arranged at interval of 1~2 bearing, and is arranged symmetrically or almost symmetry centered on bridge longitudinal axis
Arrangement；Displacement meter 2 is arranged on the longitudinal axis of each plate；
In full-bridge integral jacking, hydraulic jack 1 and displacement meter 2 under all beams or plate are arranged in together the present invention
On one width and on same longitudinal direction.
The across footpath of combined bridge of the present invention is less than or equal to 50m.
(2) jacking：Under the control device control of jack-up system, each hydraulic jack 1 is pushed up step by step simultaneously by jacking displacement
Rise, ㎜~1.2 ㎜ of each jacking 0.8, the displacement difference between adjacent beams or plate is once observed per jacking, it is ensured that the position of its plate or beam
Move difference and be no more than 0.2 ㎜~0.3 ㎜, the displacement of each hydraulic jack 1 is controlled by the displacement meter 2 under correspondence beam or plate
System, until the bearing under each beam or plate departs from the bottom surface of beam or plate；
(3) bearing treatment：After completing lifting operation, temporary support is installed near each bearing 3, and according to the degree of disease of bearing 3
Come to nothing treatment or replacing treatment are carried out to the disease bearing under each beam or plate；
(4) unload beam：After completing the Disease Processing of bearing 3, by (2) lifting operation reverse procedure unloads load hydraulic thousand step by step with step
Jin top 1, makes each bearing 3 be brought into close contact with corresponding beam or plate；
Repeat step (1)~(4), carry out down the treatment of a piece of beam or plate undersetting.
Bridge described in the present embodiment is hollow slab type bridge, and a width of 8m of bridge, single span span length 20m are disposed with 6 cored slabs,
Method Pre-stress Concrete Hollow Slab 0.95m high, bridge floor is continuous.Treatment each bearing 3 under the cored slab on abutment.
The first step, installs jack-up system.As shown in figure 1, each near 1#, 4#, 5# plate left side bearing 3 arrange one
Hydraulic jack 1, respectively arranges a hydraulic jack 1 near bearing 3 on the right of 2#, 6# plate, and displacement meter 2 is arranged in every sky
On the longitudinal axis of core bottom surface, each hydraulic jack 1, displacement meter 2 are on same width.Although hydraulic jack 1
Arrangement does not accomplish absolute symmetrical, but tends to almost symmetry arrangement, can protect the premise of positive bridge structure safe
Under, smoothly process each bearing 3 under cored slab.To ensure concrete strength more than the pressure that local pressure face is born, and jacking
During each cored slab uniform force, the top of hydraulic jack 1 is provided with jacking steel plate, and jacking steel plate is put down with cored slab bottom surface
Row is close to.
Second step, lifting operation, for hollow slab type bridge, top lifting height is controlled in 3 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and cored slab.After the completion of examination jacking, each hydraulic jack 1 is same
When jacking step by step, each jacking displacement be 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, adjacent panels are once observed per jacking
Between displacement difference, control the displacement difference between adjacent two plate to be not more than 0.2 ㎜, until each cored slab jacking is to each bearing under plate
3 are loosened, and the displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of cored slab such as table 1
It is shown.
Table 1：The actual jacking displacement of each cored slab（Unit：㎜）
| Plate is numbered | 1# | 2# | 3# | 4# | 5# | 6# |
| Actual jacking displacement | 3.13 | 3.02 | 3.10 | 3.05 | 3.06 | 3.16 |
From the point of view of jacking result, although being fitted without hydraulic jack 1 under 3# plates, itself and adjacent two panels cored slab are utilized
Between connection 3# plates are raised up, and connection between adjacent two sheet being capable of Transfer of Shear, it is ensured that bridge structure transverse direction
Tension is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 5 hydraulic jacks that relatively conventional method is every
Individual bearing is disposed about a hydraulic jack and compares, and The present invention reduces 7 hydraulic jacks, substantially increases economic effect
Benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each cored slab undersetting 3, slow unloading hydraulic jack 1, unloading
Process is to lifting operation conversely, making each bearing 3 be brought into close contact with corresponding cored slab.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
A kind of processing method of modular bridge beam support as described above is in rib beam type bridge or box beam formula bridge or board-like
Applied in bridge, i.e., for the board-like or basin type rubber under rib beam type bridge or each beam of box beam formula bridge or board-like bridge or plate
The treatment of bearing.
The present invention arranges a jacking method for jack using at interval of 1~2 bearing, and jack quantity can be reduced
50 ﹪ or so, greatly reduce construction cost, improve economic benefit；From for structure stress angle, using adjacent two panels beam,
It is capable of the mechanics principle of Transfer of Shear between plate, in bridge lateral symmetrical arrangement jacking load, it is ensured that the drawing that floorings occur
Stress is smaller or occurs without tension, makes bridge structure uniform force.
Embodiment 2：
Bridge described in the present embodiment is hollow slab type bridge, and a width of 12.5m of bridge, single span span length 20m are disposed with 9 cored slabs, empty
Core plate 0.95m high, bridge floor is continuous.Treatment each bearing 3 under the cored slab on abutment.
The first step, installs jack-up system.As shown in Fig. 2 each near 1#, 6#, 7#, 8# plate left side bearing 3 arrange
One hydraulic jack 1, respectively arranges a hydraulic jack 1, displacement meter 2 near bearing 3 on the right of 2#, 3#, 4#, 9# plate
It is arranged on the every longitudinal axis of cored slab bottom surface, each hydraulic jack 1, displacement meter 2 are on same width.To ensure
Concrete strength is more than the pressure that local pressure face is born, and each cored slab uniform force, hydraulic jack 1 during jacking
Top be provided with jacking steel plate, jacking steel plate is parallel with cored slab bottom surface to be close to.
Second step, lifting operation, for hollow slab type bridge, top lifting height is controlled in 3 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and cored slab.After the completion of examination jacking, each hydraulic jack 1 is same
When jacking step by step, each jacking displacement be 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, adjacent panels are once observed per jacking
Between displacement difference, control the displacement difference between adjacent two plate to be not more than 0.2 ㎜, until each cored slab jacking is to each bearing under plate
3 are loosened, and the displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of cored slab such as table 2
It is shown.
Table 2：The actual jacking displacement of each cored slab（Unit：㎜）
| Plate is numbered | 1# | 2# | 3# | 4# | 5# | 6# | 7# | 8# | 9# |
| Actual jacking displacement | 3.17 | 3.04 | 3.09 | 3.12 | 3.09 | 3.27 | 3.33 | 3.16 | 3.24 |
From the point of view of jacking result, although being fitted without hydraulic jack 1 under 5# plates, itself and adjacent two panels cored slab are utilized
Between connection 3# plates are raised up, and connection between adjacent two sheet being capable of Transfer of Shear, it is ensured that bridge structure transverse direction
Tension is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 8 hydraulic jacks that relatively conventional method is every
Individual bearing is disposed about a hydraulic jack and compares, and The present invention reduces 10 hydraulic jacks, substantially increases economic effect
Benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each cored slab undersetting 3, slow unloading hydraulic jack 1, unloading
Process is to lifting operation conversely, making each bearing 3 be brought into close contact with corresponding cored slab.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Embodiment 3：
For beam type bridge, a hydraulic jack is respectively arranged at the beam rib of its side bar 5 or diaphragm position, then in bridge
A hydraulic jack 1 is arranged in centre at interval of 1~2 bearing, and is arranged symmetrically centered on bridge longitudinal axis or substantially right
Claim arrangement；Displacement meter 2 is disposed adjacent under the beam rib of bearing 3；
Bridge described in the present embodiment is rib beam type bridge, and the girt strip is T beams, and a width of 12.5m of bridge, single span span length 30m are disposed with
6 T beams, deck-molding 2.0m, bridge floor is continuous.Treatment each bearing 3 under the T beams on abutment.
The first step, installs jack-up system.As shown in figure 3, each near 1#, 3#, 4#, 6# beam support 3 arrange one
Hydraulic jack 1, displacement meter 2 is arranged near every T soffits bearing 3, and each hydraulic jack 1, displacement meter 2 are in same width
On degree direction.To ensure concrete strength more than the pressure that local pressure face is born, and each T beam stress is equal during jacking
Even, the top of hydraulic jack 1 is provided with jacking steel plate, and jacking steel plate is parallel with T soffits to be close to.
Second step, lifting operation, for T beam type bridges, top lifting height is controlled in 3.5 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and T beams.Examination jacking after the completion of, each hydraulic jack 1 simultaneously by
Level jacking, each jacking displacement is 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, once observed per jacking between adjacent beams
Displacement difference, control the displacement difference between adjacent two beam to be not more than 0.3 ㎜, until each bearing 3 loosens under each T backs rise to beam,
The displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of T beams is as shown in table 3.
Table 3：The actual jacking displacement of each T beams（Unit：㎜）
| Beam is numbered | 1# | 2# | 3# | 4# | 5# | 6# |
| Actual jacking displacement | 3.53 | 3.66 | 3.87 | 3.82 | 3.63 | 3.58 |
From the point of view of jacking result, although being fitted without hydraulic jack 1 under 2#, 5# beam, itself and adjacent two panels T beams are utilized
Between connection 2#, 5# beam are raised up, and connection between adjacent two panels beam being capable of Transfer of Shear, it is ensured that bridge structure
Horizontal tensile stress is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 4 hydraulic jacks, relatively conventional side
Method each bearing is disposed about a hydraulic jack and compares, and The present invention reduces 2 hydraulic jacks, substantially increases economy
Benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each T beams undersetting 3, slow unloading hydraulic jack 1, uninstall process
To lifting operation conversely, making each bearing 3 be brought into close contact with corresponding T beams.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Embodiment 4：
Bridge described in the present embodiment is rib beam type bridge, and the girt strip is T beams, and a width of 10.5m of bridge, single span span length 25m are disposed with
5 T beams, deck-molding 1.7m, bridge floor is continuous.Treatment each bearing 3 under the T beams on abutment.
The first step, installs jack-up system.As shown in figure 4, respectively arranging a hydraulic pressure near 1#, 3#, 5# beam support 3
Jack 1, displacement meter 2 is arranged near every T soffits bearing 3, and each hydraulic jack 1, displacement meter 2 are in same width side
Upwards.To ensure concrete strength more than the pressure that local pressure face is born, and each T beam stress is uniform during jacking, liquid
The top of jack 1 is pressed to be provided with jacking steel plate, jacking steel plate is parallel with T soffits to be close to.
Second step, lifting operation, for T beam type bridges, top lifting height is controlled in 3.5 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and T beams.Examination jacking after the completion of, each hydraulic jack 1 simultaneously by
Level jacking, each jacking displacement is 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, once observed per jacking between adjacent beams
Displacement difference, control the displacement difference between adjacent two beam to be not more than 0.3 ㎜, until each bearing 3 loosens under each T backs rise to beam,
The displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of T beams is as shown in table 4.
Table 4：The actual jacking displacement of each T beams（Unit：㎜）
| Beam is numbered | 1# | 2# | 3# | 4# | 5# |
| Actual jacking displacement | 3.64 | 3.66 | 3.73 | 3.51 | 3.72 |
From the point of view of jacking result, although being fitted without hydraulic jack 1 under 2#, 4# beam, itself and adjacent two panels T beams are utilized
Between connection 2#, 4# beam are raised up, and connection between adjacent two panels beam being capable of Transfer of Shear, it is ensured that bridge structure
Horizontal tensile stress is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 3 hydraulic jacks, relatively conventional side
Method each bearing is disposed about a hydraulic jack and compares, and The present invention reduces 2 hydraulic jacks, substantially increases economy
Benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each T beams undersetting 3, slow unloading hydraulic jack 1, uninstall process
To lifting operation conversely, making each bearing 3 be brought into close contact with corresponding T beams.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Embodiment 5：
Bridge described in the present embodiment is rib beam type bridge, and the girt strip is box beam, a width of 23.0m of bridge, single span span length 25m, arrangement
There are 6 box beams, deck-molding 1.4m, bridge floor is continuous.Treatment each bearing 3 under the box beam on abutment.
The first step, installs jack-up system.As shown in figure 5, each near bearing 3 on the right of 1#, 4#, 5# box beam arrange one
Individual hydraulic jack 1, respectively arranges a hydraulic jack 1 near 2#, 3#, 6# box beam left side bearing 3, and displacement meter 2 is arranged
Between hydraulic jack 1 and corresponding bearing 3, and near bearing 3, each hydraulic jack 1, displacement meter 2 are in same width
On degree direction.To ensure concrete strength more than the pressure that local pressure face is born, and each box beam stress is equal during jacking
Even, the top of hydraulic jack 1 is provided with jacking steel plate, and jacking steel plate is parallel with box beam bottom surface to be close to.
Second step, lifting operation, for rib beam type bridge, top lifting height is controlled in 3.5 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and box beam.After the completion of examination jacking, each hydraulic jack 1 is simultaneously
Jacking step by step, each jacking displacement is 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, per jacking once observe adjacent beams it
Between displacement difference, control the displacement difference between adjacent two beam to be not more than 0.3 ㎜, until each box beam jacking is to the pine of each bearing under beam 3
Dynamic, the displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of box beam is as shown in table 5.
Table 5：The actual jacking displacement of each box beam（Unit：㎜）
| Beam is numbered | 1# | 2# | 3# | 4# | 5# | 6# |
| Actual jacking displacement | 3.57 | 3.79 | 3.82 | 3.84 | 3.73 | 3.55 |
From the point of view of jacking result, although being fitted without hydraulic jack 1 under 2#, 4# box beam, itself and adjacent two panels are utilized
Connection between box beam raises up 2#, 4# box beam, and connection between adjacent two panels beam being capable of Transfer of Shear, it is ensured that bridge
Girder construction horizontal tensile stress is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 6 hydraulic jacks, relatively
Conventional method each bearing is disposed about a hydraulic jack and compares, and The present invention reduces 6 hydraulic jacks, greatly improves
Economic benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each box beam undersetting 3, slow unloading hydraulic jack 1 was unloaded
Journey is to lifting operation conversely, making each bearing 3 be brought into close contact with corresponding box beam.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Embodiment 6：
For freely-supported bridge, the corresponding position of another bridge or plate is also disposed with hydraulic jack 1 to the present invention on same bridge pier
With displacement meter 2.
For freely-supported bridge, the jacking displacement difference of adjacent two panels beam or plate is no more than 0.1 ㎜ to the present invention on same bridge pier.
Bridge described in the present embodiment is hollow slab type bridge, and a width of 8m of bridge, single span span length 20m are disposed with 6 cored slabs,
Method Pre-stress Concrete Hollow Slab 0.95m high, bridge floor is continuous.Treatment each bearing 3 under the cored slab on bridge pier.
The first step, installs jack-up system.As shown in fig. 6, each near A sides 1#, 4#, 5# plate left side bearing 3 arrange one
Individual hydraulic jack 1, respectively arranges a hydraulic jack 1 near bearing 3 on the right of 2#, 6# plate, and displacement meter 2 is arranged in every
On the longitudinal axis of cored slab bottom surface, each hydraulic jack 1, displacement meter 2 are on same width.Meanwhile, to prevent entirety
Formula floorings ftracture, and for freely-supported bridge, the corresponding position of another across cored slab B sides is also disposed with hydraulic pressure thousand on same bridge pier
Jin top 1 and displacement meter 2.Although the arrangement of hydraulic jack 1 does not accomplish absolute symmetrical, tend to symmetrical cloth
Put, can smoothly process each bearing 3 under cored slab on the premise of positive bridge structure safe is protected.To ensure that concrete strength is more than
The pressure that local pressure face is born, and each cored slab uniform force during jacking, the top of hydraulic jack 1 is provided with top
Steel plate is risen, jacking steel plate is parallel with cored slab bottom surface to be close to.
Second step, lifting operation, for hollow slab type bridge, top lifting height is controlled in 3 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and cored slab.After the completion of examination jacking, each hydraulic jack 1 is same
When jacking step by step, each jacking displacement be 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, adjacent panels are once observed per jacking
Between displacement difference, control the displacement difference between laterally adjacent two plate to be not more than 0.2 ㎜, the displacement difference between longitudinally adjacent two plate
No more than 0.1 ㎜, until each cored slab jacking to each bearing 3 under plate loosens, the displacement of each hydraulic jack 1 is by corresponding position
Meter 2 is moved to control.Each actual jacking displacement data of cored slab is as shown in table 6.
Table 6：The actual jacking displacement of each cored slab（Unit：㎜）
| Plate is numbered | 1# | 2# | 3# | 4# | 5# | 6# |
| Actual jacking displacement A sides | 3.10 | 3.17 | 3.22 | 3.28 | 3.19 | 3.02 |
| Actual jacking displacement B sides | 3.09 | 3.21 | 3.28 | 3.31 | 3.25 | 3.10 |
It is empty with adjacent two panels using it although being fitted without hydraulic jack 1 under 3# cored slabs from the point of view of jacking result
Connection between core raises up 3# cored slabs, and connection between adjacent two panels cored slab being capable of Transfer of Shear, it is ensured that
Bridge structure horizontal tensile stress is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 10 hydraulic jacks, phase
A hydraulic jack is disposed about to conventional method each bearing to compare, The present invention reduces 14 hydraulic jacks, significantly
Improve economic benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each cored slab undersetting 3, slow unloading hydraulic jack 1, unloading
Process is to lifting operation conversely, making each bearing 3 be brought into close contact with corresponding cored slab.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Embodiment 7：
Bridge described in the present embodiment is rib beam type bridge, and the girt strip is T beams, and a width of 12.5m of bridge, single span span length 30m are disposed with
6 T beams, deck-molding 2.0m, bridge structure is continuous, and bridge floor is continuous.Treatment each bearing 3 under the T beams on abutment.
The first step, installs jack-up system.As shown in fig. 7, respectively being arranged under diaphragm near the right side of 1#, 4# beam support 3
One hydraulic jack 1, a hydraulic jack 1 is respectively arranged under diaphragm near the left side of 3#, 6# beam support 3；Displacement meter 2
It is arranged between hydraulic jack 1 and corresponding bearing 3, and near bearing 3, each hydraulic jack 1, displacement meter 2 are same
On one width.To ensure concrete strength more than the pressure that local pressure face is born, and each T beam stress during jacking
Uniformly, the top of hydraulic jack 1 is provided with jacking steel plate, and jacking steel plate is parallel with T soffits to be close to.
Second step, lifting operation, for T beam type bridges, top lifting height is controlled in 3.5 ㎜ or so.In the control of jack-up system
Under device control processed, whether examination jacking, the jacking simultaneously of each hydraulic jack 1, it is therefore an objective to detect jack-up system state are carried out first
Space good and between the elimination top steel plate of hydraulic jack 1 and T beams.Examination jacking after the completion of, each hydraulic jack 1 simultaneously by
Level jacking, each jacking displacement is 0.8 ㎜~1.2 ㎜（The present embodiment is 1.0 ㎜）, once observed per jacking between adjacent beams
Displacement difference, control the displacement difference between adjacent two beam to be not more than 0.3 ㎜, until each bearing 3 loosens under each T backs rise to beam,
The displacement of each hydraulic jack 1 is controlled by corresponding displacement meter 2.Each actual jacking displacement data of T beams is as shown in table 7.
Table 7：The actual jacking displacement of each T beams（Unit：㎜）
| Beam is numbered | 1# | 2# | 3# | 4# | 5# | 6# |
| Actual jacking displacement | 3.62 | 3.67 | 3.89 | 3.86 | 3.62 | 3.59 |
It is empty with adjacent two panels using it although being fitted without hydraulic jack 1 under 2#, 5#T beam from the point of view of jacking result
Connection between core raises up 2#, 5#T beam, and connection between adjacent two panels T beams being capable of Transfer of Shear, it is ensured that bridge
Girder construction horizontal tensile stress is smaller or occurs without tension.Meanwhile, the present embodiment only needs to arrange 4 hydraulic jacks, relatively
Conventional method each bearing is disposed about a hydraulic jack and compares, and The present invention reduces 2 hydraulic jacks, greatly improves
Economic benefit.
3rd step, bearing treatment.It is such as completely loose first with the loosening situation for striking bar each bearing 3 of inspection after the completion of jacking
It is dynamic, jacking step by step individually is carried out to the hydraulic jack 1 near the bearing 3, until the bearing 3 loosens completely.During construction, first
Temporary support is placed on bent cap, the failure of hydraulic jack 1 occurs surprisingly, and according to the disease of bearing 3 in preventing work progress
Degree carries out come to nothing treatment or replacing treatment to it, during replacing, takes centering, location measure to determine the riding position of new bearing 3.
4th step, unloads beam.After completing the treatment of each T beams undersetting 3, slow unloading hydraulic jack 1, uninstall process
To lifting operation conversely, making each bearing 3 be brought into close contact with corresponding T beams.
Repeating the above steps carries out the next pier of bridge, the treatment of table mount.
Remaining same embodiment 1.
Claims (6)
1. a kind of processing method of modular bridge beam support, it is characterized in that it comprises the following steps：
(1) jack-up system is installed：Jack-up system includes hydraulic jack, displacement meter and control device；Hydraulic jack is arranged on
Near the bearing of beam or plate one end, and it is arranged on the same width of each beam or plate；Displacement meter is arranged in each beam or plate
Bottom surface, and be arranged on the same width of each beam or plate；
For board-like bridge, a hydraulic jack is respectively arranged at the beam rib position on the outside of its side plate, it is then every to bridge center
1~2, interval bearing arranges a hydraulic jack, and is arranged symmetrically centered on bridge longitudinal axis or almost symmetry cloth
Put；Displacement meter is arranged on the longitudinal axis of each plate；
For beam type bridge, a hydraulic jack is respectively arranged at the beam rib of its side bar or diaphragm position, then in bridge
A hydraulic jack is arranged in centre at interval of 1~2 bearing, and is arranged symmetrically or almost symmetry centered on bridge longitudinal axis
Arrangement；Displacement meter is disposed adjacent under the beam rib of bearing；
(2) jacking：Under the control device control of jack-up system, each hydraulic jack presses the jacking step by step simultaneously of jacking displacement, often
㎜~1.2 ㎜ of secondary jacking 0.8, the displacement difference between adjacent beams or plate is once observed per jacking, it is ensured that the displacement difference of its plate or beam
No more than 0.2 ㎜~0.3 ㎜, the displacement of each hydraulic jack is controlled by the displacement meter under correspondence beam or plate, until
Bearing under each beam or plate departs from the bottom surface of beam or plate；
(3) bearing treatment：After completing lifting operation, temporary support is installed near each bearing, and according to the degree of disease pair of bearing
Disease bearing under each beam or plate carries out come to nothing treatment or replacing treatment；
(4) unload beam：After completing the Disease Processing of bearing, by (2) lifting operation reverse procedure unloads load hydraulic thousand step by step with step
Jin top, makes each bearing be brought into close contact with corresponding beam or plate；
Repeat step (1)~(4), carry out down the treatment of a piece of beam or plate undersetting.
2. the processing method of modular bridge beam support according to claim 1, it is characterized in that for freely-supported bridge, same bridge
The corresponding position of another bridge or plate is also disposed with hydraulic jack and displacement meter on pier.
3. the processing method of modular bridge beam support according to claim 1, it is characterized in that the combined bridge across
Footpath is less than or equal to 50m.
4. the processing method of modular bridge beam support according to claim 1, it is characterized in that for freely-supported bridge, same bridge
The jacking displacement difference of adjacent two panels beam or plate is no more than 0.1 ㎜ on pier.
5. the processing method of modular bridge beam support according to claim 1, it is characterized in that in full-bridge integral jacking, peace
Hydraulic jack and displacement meter under all beams or plate be arranged on same width and same longitudinal direction on.
6. a kind of processing method of modular bridge beam support as described in claim 1 or 2 or 3 or 4 or 5 in rib beam type bridge or
Applied in box beam formula bridge or board-like bridge, i.e., under rib beam type bridge or each beam of box beam formula bridge or board-like bridge or plate
Board-like or pot rubber bearing treatment.
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Application publication date: 20170707 |