CN106012875B - The method of the local lossless jacking replacing time of plate girder bridge - Google Patents
The method of the local lossless jacking replacing time of plate girder bridge Download PDFInfo
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- CN106012875B CN106012875B CN201610603014.1A CN201610603014A CN106012875B CN 106012875 B CN106012875 B CN 106012875B CN 201610603014 A CN201610603014 A CN 201610603014A CN 106012875 B CN106012875 B CN 106012875B
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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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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses the method for the local lossless jacking replacing time of plate girder bridge, including step：Determine the default top lifting height of each plate-girder in jacking region and jacking region；Hydraulic jack is set below plate-girder hinge seam in jacking region；Hydraulic jack is connected with hydraulic power unit and displacement transducer respectively；Hydraulic power unit and displacement transducer are connected with console respectively；Console control hydraulic jack enters line asynchronous jacking；The top lifting height of plate-girder is reached after default top lifting height in jacking region, and hydraulic power unit ring closes pressurize；Change the bearing below plate-girder in jacking region.The inventive method is small to traffic impact on bridge, the Lifting Equipment needed is few, and avoid jack jacking from falling the unbalanced of process after rise, plate-girder hinge gap-like condition is monitored simultaneously, the damage of seam can be avoided cutting with scissors plate-girder, plate girder bridge locally lossless jacking replacing time is realized, and the equipment jacking process operation is intelligent, and quick for installation, efficiency of construction is high, cost reduces by three into the above.
Description
Technical field
The present invention relates to the technique of plate-girder jacking replacing time, the espespecially side of the local lossless jacking replacing time of plate girder bridge
Method.
Background technology
With the development of China's municipal administration, transportation industry, Bridges in Our Country owning amount is up to more than 600,000 seats, in fortune for many years
During battalion, cause the laminated rubber bearing of bridge ftracture due to many-sided reason such as corrosion and ageing, stress deformation, breakage, cut
Cut through it is bad, therefore, after a certain time, it is necessary to change the disease bearing of plate-girder.In Practical Project, typically by entering to bridge
Disease bearing is changed in row jacking.
At present, Bridges in Our Country jack lifting technique is mainly PLC synchronization of jacking up technologies, and China is same using bridge first in 2003
Jack lifting technique is walked, by the development of more than 10 years, bridge synchronous jacking technical matters turned into ripe and safe and reliable construction party
Method.Bridge synchronous jacking technology is widely used in many aspects such as bridge synchronous jacking, the adjustment of the bridge gradient, bridge correction, relates to
And a variety of bridge structures such as box beam, T-shaped beam, plate-girder, better effects are obtained in actual applications.
But, bridge synchronous jacking has preferably society's effect during many across footpaths, the synchronization of jacking up of large heavy girder
Benefit, but for the local bearing replacement engineering of small across footpath plate-girder, synchronization of jacking up equipment construction cost is too high, and construction period mistake
Long, the social benefit of generation is relatively low.
Therefore, the applicant is directed to providing a kind of method of the local lossless jacking replacing time of plate girder bridge, the letter of its step
It is single, simple operation, and construction cost is low, the construction period is short.
The content of the invention
It is an object of the invention to provide a kind of method of the local lossless jacking replacing time of plate girder bridge, its step is simple, behaviour
Make convenient, and construction cost is low, the construction period is short.
In order to solve the above technical problems, the invention provides the method for the local lossless jacking replacing time of plate girder bridge, including
Step：
S10：Determine the default top lifting height of each plate-girder in jacking region and the jacking region；
S20：Hydraulic jack is set below plate-girder hinge seam in the jacking region；
S30：The hydraulic jack is connected with hydraulic power unit and displacement transducer respectively；
S40：The hydraulic power unit and displacement transducer are connected with console respectively；
S50：The console control hydraulic jack enters line asynchronous jacking, and the asynchronous jacking refers to different hydraulic jacks
The top lifting height on top has differences；
S60：The top lifting height of plate-girder in the jacking region is reached after the default top lifting height, the hydraulic power unit
Ring closes pressurize；
S70：Change the bearing below plate-girder in the jacking region.
Preferably, the step S10 includes step：
S11：It is determined that needing the axis of the plate-girder of replacing time；
S12：The axis of the plate-girder is orientated as to the axis in the jacking region；
S13：Multiple tracks plate-girder hinge seam is extended respectively as the jacking region to the both sides of the axis.
Preferably, in the step S10, the default top lifting height of the plate-girder is along in the jacking region
The direction of axis is gradually reduced.
Preferably, the road plate-girder hinge seams of both sides Ge You tri- of the axis in the jacking region, and the default top of the plate-girder
Direction of the rise along the axis away from the jacking region is followed successively by 6mm, 3mm, 0.
Preferably, in the step S60, the top lifting height of the plate-girder in the jacking region reaches the default jacking
After height, the bottom surface of plate-girder is in Bidirectional horizontal ramp shaped in the jacking region.
Preferably, step is also included between the step S40 and the step S50：
S81：The console controls the hydraulic jack to carry out pre- jacking；
S82：Judge institute's displacement sensors whether normal communication and whether accurate feedback data, if so, then carrying out step
S50, if it is not, then regulation institute displacement sensors, until institute's displacement sensors normal communication and accurate feedback data.
Preferably, in the step S81, height≤0.5mm of the pre- jacking of hydraulic jack.
Preferably, step is also included between the step S10 and step S50：
S91：Hinge seam monitor is installed at 1/4 span centre of per pass plate-girder hinge seam and end in the jacking region；
S92：The hinge is stitched into monitor to be connected with console；
Also include step between the step S50 and step S60：
S101：Monitor is stitched by the hinge to be monitored the plate-girder hinge seam in the jacking region；
S102：Monitoring Data is obtained, the Monitoring Data is that the relative displacement for the plate-girder that the plate-girder cuts with scissors seam both sides is poor；
S103：Judge the Monitoring Data whether exceed preset displacement it is poor, if so, then alert and stop described in
The asynchronous jacking of hydraulic jack, if it is not, then proceeding the asynchronous jacking of the hydraulic jack.
Preferably, the lower section of per pass plate-girder hinge seam is equipped with hydraulic jack described in a pair, and one in the jacking region
The hydraulic jack is symmetrical arranged relative to plate-girder hinge seam；And/or；Institute's displacement sensors plate-girder adjacent thereto
The distance between hinge seam is less than 10cm；And/or；Pad steel plate is provided between the hydraulic jack and the plate-girder.
Preferably, the method for the local lossless jacking replacing time of the plate girder bridge also includes step after the step S70：
S110：The console controls the hydraulic jack to carry out reversely classification falling in proportion, and the hydraulic power unit control falls after rise
Speed.
The method of the local lossless jacking replacing time of plate girder bridge of the present invention can realize following at least one beneficial effect：
1st, the method for the local lossless jacking replacing time of plate girder bridge of the invention is by setting rational jacking region, then leads to
Cross console and line asynchronous jacking is entered to each hydraulic jack in jacking region, plate-girder hinge seam top lifting height is reached default top
Rise, then the bearing of plate-girder is changed, compared to the synchronization of jacking up of plate girder bridge, this method step is simple, and simple operation can be fast
Speed completes the replacing of local bearing, and the construction period is short, and the number of devices used is few, reduce further construction cost.
2nd, the method for the local lossless jacking replacing time of plate girder bridge of the invention is by the default top of each plate-girder in jacking region
Rise is set to reduce successively along the direction of the axis away from jacking region, and the top lifting height of all plate-girders reaches default
After top lifting height, the bridge bottom surface in jacking region is Bidirectional horizontal ramp shaped, and so setting can make the bridge in jacking region
Top lifting height gradually smooth change, so that the safety of plate-girder hinge seam is effectively ensured.
3rd, hydraulic jack of the method for the local lossless jacking replacing time of plate girder bridge of the invention in jacking region
Enter before line asynchronous jacking, pre- jacking first is carried out to it, detect that displacement transducer and hinge seam monitor etc. are by pre- jacking
It is no can be with normal communication and feedback data, so that being smoothed out for follow-up asynchronous jacking is effectively ensured.
4th, the method for the local lossless jacking replacing time of plate girder bridge of the invention is by setting hinge seam monitor, so that effectively
Each plate-girder hinge of plate-girder in monitoring jacking region be sewn on during the asynchronous jacking of hydraulic jack whether safety, once monitoring
To plate-girder hinge seam unsafe condition, then stop asynchronous jacking process immediately, plate-girder can be further prevented effectively from by so setting
Hinge seam is damaged.
5th, plate girder bridge of the invention locally lossless jacking replacing time method hydraulic jack asynchronous jacking process
In, console controls each hydraulic jack to be classified jacking in proportion, has changed after bearing, and console controls each hydraulic jack
Jacking row is classified falling in proportion, that is to say, that hydraulic jack at each plate-girder hinge seam basis under the control of console
The peace of plate-girder hinge seam in jacking region can be further effectively ensured in the slow equably change in elevation of certain ratio, so operation
Entirely.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of schematic diagram of the local specific embodiment of the method for lossless jacking replacing time of plate girder bridge of the present invention；
Fig. 2 is I-I sectional view in Fig. 1；
Fig. 3 is the structure enlarged diagram at A in Fig. 2；
Fig. 4 is II-II sectional view in Fig. 1；
Fig. 5 is the structure enlarged diagram at B in Fig. 4；
Fig. 6 is the bottom surface structure enlarged diagram that plate girder bridge completes local jacking back plate beam.
Drawing reference numeral explanation：
Plate-girder 1, jacking region 2, the axis 3 in jacking region, plate-girder hinge seam 4, hydraulic jack 5, displacement transducer 6,
Pad steel plate 7, hydraulic power unit 8, console 9, hinge seam monitor 10, the bottom surface 11 of plate-girder, bent cap pier shaft 12.
Embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Embodiment one
The method that embodiment one discloses a kind of local lossless jacking replacing time of plate girder bridge, including step：
S10：Determine the default top lifting height of each plate-girder in jacking region and jacking region；
S20：Hydraulic jack is set below plate-girder hinge seam in jacking region；
S30：Hydraulic jack is connected with hydraulic power unit and displacement transducer respectively；
S40：Hydraulic power unit and displacement transducer are connected with console respectively；
S50：Console control hydraulic jack enters line asynchronous jacking, and asynchronous jacking refers to the jacking of different hydraulic jacks
Highly have differences；
S60：The top lifting height of plate-girder is reached after default top lifting height in jacking region, and hydraulic power unit ring closes pressurize；
S70：Change the bearing of plate-girder in jacking region.
Embodiment two
Compared with implementing one, the improvement dwelling of embodiment two is, the local lossless top of the plate girder bridge disclosed in embodiment two
Rising step S10 in the method for replacing time includes step：
S11：It is determined that needing the axis of the plate-girder of replacing time；
S12：The axis of plate-girder is orientated as to the axis in jacking region；
S13：Multiple tracks plate-girder hinge seam is extended respectively as jacking region to the both sides of axis.
Specifically, in step slo, the direction of the default top lifting height of plate-girder along the axis away from jacking region by
Gradually reduce.
Specifically, the road plate-girder hinge seams of both sides Ge You tri- of the axis in jacking region, and the default top lifting height edge of plate-girder
And be followed successively by 6mm, 3mm, 0 away from the direction of the axis in jacking region.
Specifically, in step S60, the top lifting height of the plate-girder in jacking region is reached after default top lifting height, jacking
The bottom surface of plate-girder is in Bidirectional horizontal ramp shaped in region.
Certainly, in other embodiments, the maximum of the default top lifting height of plate-girder is set to 5~10mm in jacking region,
The difference in height of adjacent plate-girder hinge seam can also be set to 2mm, 2.5mm, 3.5mm or 4mm etc.；The default jacking of plate-girder in jacking region
Height can also be changed according to other rules, such as increase, reduce, increase, reduce, increase, reduce rule so
During setting, the top lifting height of the plate-girder in jacking region is reached after default top lifting height, and the bottom surface of plate-girder is in ripple in jacking region
Roll over shape.
Embodiment three
Compared with implementing one, the improvement dwelling of embodiment three is, the asynchronous lossless top of the plate girder bridge disclosed in embodiment three
Rise the method for local replacing bearing also includes step between step S40 and step S50：
S81：Console control hydraulic jack carries out pre- jacking；
S82：Judge displacement transducer whether normal communication and whether accurate feedback data, if so, then carry out step S50,
If it is not, displacement transducer is then adjusted, until displacement transducer normal communication and accurate feedback data.
Specifically, in step S81, height≤0.5mm of the pre- jacking of hydraulic jack.
Certainly, in other embodiments, the height of the pre- jacking of hydraulic jack can also be adjusted as needed；May be used also
With during jacking, directly detected by detection device displacement transducer whether normal communication and accurate feedback data.
Example IV
Compared with implementing one, the improvement dwelling of example IV is, the local lossless top of the plate girder bridge disclosed in example IV
Rise the method for replacing time also includes step between step S10 and step S50：S91：The per pass plate-girder hinge seam in jacking region
1/4 span centre at and end install hinge seam monitor；S92：Hinge seam monitor is connected with console.
In addition, also including step between step S50 and step S60：S101：By cutting with scissors seam monitor in jacking region
Plate-girder hinge seam be monitored；S102：Monitoring Data is obtained, Monitoring Data is the relative displacement for the plate-girder that plate-girder cuts with scissors seam both sides
Difference；S103：Judge whether Monitoring Data exceedes preset displacement poor, if so, then alert and stopping hydraulic jack
Asynchronous jacking, if it is not, then proceeding the asynchronous jacking of hydraulic jack.
Certainly, in other embodiments, the Monitoring Data of hinge seam monitor can also cut with scissors the stressing conditions of seam for plate-girder.
Embodiment five
Compared with implementing one, embodiment five is theed improvement is that, the local lossless top of the plate girder bridge disclosed in embodiment five
The lower section of per pass plate-girder hinge seam is equipped with a pair of hydraulic jacks, and a pair of liquid in the method for rising replacing time, its jacking region
Pressure jack is symmetrical arranged relative to plate-girder hinge seam；Plate-girder can be made during jacking by so setting, the both sides of plate-girder hinge seam
Can be with uniform stressed, so as to be further ensured that the safety of plate-girder hinge seam.It is specific to require, displacement transducer plate-girder adjacent thereto
The distance between hinge seam is less than 10cm, is tamped between hydraulic jack and plate-girder by pad steel plate.
Meanwhile, the method for the local lossless jacking replacing time of plate girder bridge also includes step after step S70：S110：Control
Platform controls the hydraulic jack to carry out reversely classification falling in proportion, hydraulic power unit control fall velocity.
Certainly, in other embodiments, the number for the hydraulic jack that the lower section that per pass plate-girder hinge is stitched in jacking region is set
Mesh can also be 1,3,4 etc.；The distance between displacement transducer plate-girder hinge seam adjacent thereto can also enter according to actual needs
Row adjustment；Its fall velocity can also be different proportion when multiple hydraulic jacks withstand on falling.
Embodiment six
As shown in Figures 1 to 6, embodiment six is a kind of method one of the local lossless jacking replacing time of plate girder bridge of the present invention
Plant more preferred embodiment, including step：
S10：Determine the default top lifting height of each plate-girder in jacking region and jacking region；
S11：It is determined that needing the axis of the plate-girder 1 of replacing time；
S12：The axis of plate-girder 1 is orientated as to the axis 3 in jacking region；
S13：Three road plate-girder hinge seams 4 are extended respectively as jacking region 2, plate-girder hinge to the both sides of axis 3 in jacking region
Direction of the default top lifting height of seam 4 along the axis 3 away from jacking region is gradually reduced, and is followed successively by 6mm, 3mm, 0.
S20：A pair of hydraulic jacks 5 are set on bent cap bridge pier 12 in jacking region 2 below per pass plate-girder hinge seam 4,
Tamped, and cut with scissors in plate-girder at the span centre of seam 4 and end setting hinge seam prison by pad steel plate 7 between hydraulic jack 5 and plate-girder 1
Survey device 10；
S30：Hydraulic jack 5 is connected with hydraulic power unit 8 and displacement transducer 6 respectively, displacement transducer 6 is adjacent thereto
Plate-girder hinge seam the distance between 4 be less than 10cm, and precision≤± 0.1mm of displacement transducer 6；
S40：Hydraulic power unit 8, displacement transducer 6 and hinge seam monitor 10 are connected with console 9 respectively；
S51：The control of console 9 hydraulic jack 5 carries out pre- jacking, pre- top lifting height≤0.5mm；
S52：Judge displacement transducer 6 and hinge seam monitor 10 whether normal communication and whether accurate feedback data, if so,
Step S60 is then carried out, if it is not, then regulation displacement transducer 6 and hinge seam monitor 10, until displacement transducer 6 and hinge seam monitoring
The normal communication of device 10 and accurate feedback data.
S60：The control of console 9 hydraulic jack 5 enters line asynchronous jacking, and asynchronous jacking refers to different hydraulic jacks 5
Top lifting height has differences, and the hydraulic jack 5 in jacking region 2 is to be classified jacking in proportion during asynchronous jacking；
S71：The plate-girder hinge seam 4 in jacking region 2 is monitored by cutting with scissors seam monitor 10；
S72：Monitoring Data is obtained, Monitoring Data is that the relative displacement for the plate-girder that plate-girder cuts with scissors 4 both sides of seam is poor；
S73：Judge whether Monitoring Data exceedes preset displacement poor, if so, then alert and stopping hydraulic jack
The asynchronous jacking on top, if it is not, then proceeding the asynchronous jacking of hydraulic jack；
S80：The top lifting height of plate-girder hinge seam 4 in jacking region 2 is reached after default top lifting height, and the ring of hydraulic power unit 8 is closed
Pressurize, as shown in fig. 6, the bottom surface 11 of plate-girder is in Bidirectional horizontal ramp shaped in jacking region 2；
S90：Change the bearing of plate-girder in jacking region 2；
S100：The control of console 9 hydraulic jack 5 carries out reversely classification falling in proportion, and the control of hydraulic power unit 8 falls speed after rise
Degree.
In the present embodiment, the No leakage servo valve control technology that hydraulic power unit 8 is controlled using buncher, this hydraulic pump
Valve can effectively control hydraulic return speed, prevent hydraulic jack moment from falling after rise, cause plate-girder hinge seam damage.
The present invention plate girder bridge locally lossless jacking replacing time method need equipment it is few, quick for installation, plate-girder is different
Step jacking method step is few, and overall process intelligent operation effectively shortens the construction period, reduces construction cost.And it is different in plate-girder
Walk during jacking, method of the invention can effectively reduce relative displacement and the relative rotation of plate-girder hinge seam both sides plate-girder, so that
Ensure the safety of plate-girder hinge seam.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. the method for the asynchronous lossless jacking local replacing bearing of plate girder bridge, it is characterised in that including step：
S10：Determine the default top lifting height of each plate-girder in jacking region and the jacking region；
S20：Hydraulic jack is set below plate-girder hinge seam in the jacking region；
S30：The hydraulic jack is connected with hydraulic power unit and displacement transducer respectively；
S40：The hydraulic power unit and displacement transducer are connected with console respectively；
S50：The console control hydraulic jack enters line asynchronous jacking, and the asynchronous jacking refers to different hydraulic jacks
Top lifting height has differences；
S60：The top lifting height of plate-girder in the jacking region is reached after the default top lifting height, and the hydraulic power unit ring is closed
Pressurize；
S70：Change the bearing below plate-girder in the jacking region；
The step S10 includes step：
S11：It is determined that needing the axis of the plate-girder of replacing time；
S12：The axis of the plate-girder is orientated as to the axis in the jacking region；
S13：Multiple tracks plate-girder hinge seam is extended respectively as the jacking region to the both sides of the axis.
2. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 1, it is characterised in that：In the step
In S10, the direction of the default top lifting height of the plate-girder along the axis away from the jacking region is gradually reduced.
3. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 2, it is characterised in that：The jacking area
Described in the roads of both sides Ge You tri- of the axis in domain plate-girder hinge seam, and the plate-girder default top lifting height along away from the jacking
The direction of the axis in region is followed successively by 6mm, 3mm, 0.
4. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 1, it is characterised in that：In the step
In S60, the top lifting height of the plate-girder in the jacking region is reached after the default top lifting height, plate-girder in the jacking region
Bottom surface be in Bidirectional horizontal ramp shaped.
5. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 1, it is characterised in that：In the step
Also include step between S40 and the step S50：
S81：The console controls the hydraulic jack to carry out pre- jacking；
S82：Judge institute's displacement sensors whether normal communication and whether accurate feedback data, if so, then carry out step S50,
If it is not, institute's displacement sensors are then adjusted, until institute's displacement sensors normal communication and accurate feedback data.
6. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 5, it is characterised in that：In the step
In S81, height≤0.5mm of the pre- jacking of hydraulic jack.
7. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 1, it is characterised in that：In the step
Also include step between S10 and step S50：
S91：Hinge seam monitor is installed at 1/4 span centre of per pass plate-girder hinge seam and end in the jacking region；
S92：The hinge is stitched into monitor to be connected with console；
Also include step between the step S50 and step S60：
S101：Monitor is stitched by the hinge to be monitored the plate-girder hinge seam in the jacking region；
S102：Monitoring Data is obtained, the Monitoring Data is that the relative displacement for the plate-girder that the plate-girder cuts with scissors seam both sides is poor；
S103：Judge whether the Monitoring Data exceedes preset displacement poor, if so, then alert and stopping the hydraulic pressure
The asynchronous jacking of jack, if it is not, then proceeding the asynchronous jacking of the hydraulic jack.
8. the method for the local lossless jacking replacing time of plate girder bridge as claimed in claim 1, it is characterised in that：The jacking area
The lower section of per pass plate-girder hinge seam is equipped with hydraulic jack described in a pair in domain, and hydraulic jack described in a pair is relative to described
Plate-girder hinge seam is symmetrical arranged；
And/or；
The distance between institute's displacement sensors plate-girder hinge seam adjacent thereto is less than 10cm；
And/or；
Pad steel plate is provided between the hydraulic jack and the plate-girder.
9. the method for the local lossless jacking replacing time of plate girder bridge as described in any one of claim 1 to 8, it is characterised in that：
Also include step after the step S70：
S110：The console controls the hydraulic jack to carry out reversely classification falling in proportion, the hydraulic power unit control
Fall velocity.
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| CN106758874A (en) * | 2016-12-14 | 2017-05-31 | 湖南城市学院 | The processing method of combined type beam bridge seat and application |
| CN112523098B (en) * | 2020-12-07 | 2022-08-12 | 中交第一公路勘察设计研究院有限公司 | Method for improving anti-cracking performance of hogging moment area of steel-concrete composite beam bridge |
| CN112663519A (en) * | 2020-12-22 | 2021-04-16 | 中国十九冶集团有限公司 | Construction method for replacing bridge support through multipoint synchronous jacking |
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| CN202390764U (en) * | 2011-12-23 | 2012-08-22 | 中交第三航务工程局有限公司 | PLC (Programmable Logic Controller) hydraulic proportional synchronous jacking system for bridge jacking |
| CN103511374A (en) * | 2012-06-29 | 2014-01-15 | 李志华 | PLC multipoint synchronous jacking-up hydraulic system |
| JP6232300B2 (en) * | 2014-01-28 | 2017-11-15 | 首都高速道路株式会社 | Re-fixing method for existing PC steel |
| JP6010070B2 (en) * | 2014-07-03 | 2016-10-19 | オリエンタル白石株式会社 | Temporary closing method for existing underwater structures |
| KR20160026200A (en) * | 2014-08-29 | 2016-03-09 | 이윤재 | System for floating superstructure of bridge by using computer |
| CN104762884B (en) * | 2015-04-30 | 2017-04-05 | 湖南联智桥隧技术有限公司 | The control method of Multipoint synchronous intelligent tensioning system |
| CN105002919B (en) * | 2015-07-29 | 2016-11-23 | 厦门理工学院 | A kind of system making prefabricated cushion cap be mutually located with many fixing steel-pipe piles and positioning process thereof |
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