CN109024316B - Bridge body lifting system installed on bridge pier - Google Patents
Bridge body lifting system installed on bridge pier Download PDFInfo
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- CN109024316B CN109024316B CN201811027380.2A CN201811027380A CN109024316B CN 109024316 B CN109024316 B CN 109024316B CN 201811027380 A CN201811027380 A CN 201811027380A CN 109024316 B CN109024316 B CN 109024316B
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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
The invention discloses a bridge girder body lifting system installed on a bridge pier, which comprises a bridge pier fixing device and a lifting assembly, wherein a horizontal supporting platform is formed on the upper surface of the bridge pier fixing device, the lifting assembly comprises upward jacks which are arranged on the supporting platform along the circumferential direction of the bridge pier, and the lifting system is characterized in that the lifting assembly also comprises a horizontal annular force-equalizing ring, the force-equalizing ring is sleeved outside a support at the upper end of the bridge pier, the upper surface of the force-equalizing ring is a jacking force-applying surface connected with the bridge, and the lower surface of the force-equalizing ring is a jacking force-applying surface connected with the upper end of the jack. The invention is specially used for the integral beam body lifting system of the bridge with the lower structure without the capping beam, has simple structure, good fixing effect and stability and convenient construction, can better realize synchronous jacking and protect the safety of construction.
Description
Technical Field
The invention relates to the field of highway bridge engineering, in particular to bridge body lifting equipment arranged on a pier top.
Background
At present, most of in-service bridges (especially curved continuous box girder bridges) in China have expansion joint damage phenomena of different degrees after being used for years, such as: shear failure, bulging on both sides, etc.; in addition, a large number of bridges can generate certain longitudinal and transverse displacement under various dynamic actions (such as earthquakes, vehicle and ship collisions and the like), and can generate displacement in any direction under certain static actions (such as dead clamping of expansion joints, temperature action, eccentricity of static and dynamic loads and the like) and gradually accumulate the displacement along with time. The bridges with the deviation of the beam body seriously threaten the safety of road operation, and in addition, the bridges are very necessary to be wholly lifted and subjected to support replacement or transverse resetting so as to fundamentally solve the problems.
Aiming at the research of integral bridge lifting equipment, a method P L C synchronous jacking method commonly used in China at present, but a large number of engineering practices show that the method still has some problems, for example, in the jacking process, if the reading of an instrument panel is inaccurate, or a certain jack leaks oil, is damaged, and the like, the construction is not carried out according to the synchronous jacking, so that larger stress is often caused, and even an accident that a bridge is damaged and people die is caused.
CN201520232817 discloses a support for jacking a road bridge. The device for realizing bridge jacking based on pier installation specifically adopts two arc-shaped fixing pieces along the circumferential direction of the pier, adopts the bolt to forcibly deform and press the device to be installed and fixed on the pier, and then sets the supporting platform to realize jacking support of the jack.
The scheme of above-mentioned patent can realize the jack installation based on pier structural style. The following drawbacks still remain: 1. in the jacking process, the jack action position has too big stress concentration, leads to the existence to push up the local bad possibility of roof beam body itself, and the jacking support effect is relatively poor, and the jacking synchronism is relatively poor. 2. A the stationary blade that is arranged in fixed structure relies on two arcs to directly paste tightly at pier circumference surface, then relies on the spiral to detain by force and gathers together the pressure that the deformation produced and realize holding tightly, and frictional force offsets out of shape power easily like this, and then has reduced and has compressed tightly the effect, and device self stability is relatively poor.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a simple structure, can avoid jacking position local stress too big, improve jacking synchronism, improve the bridge girder body lifting system of installing on the pier of fixed reliability and device stability.
In order to solve the technical problems, the invention adopts the following technical scheme:
a bridge girder body lifting system installed on a bridge pier comprises a bridge pier fixing device and a lifting assembly, wherein the bridge pier fixing device comprises two fixing pieces which are oppositely arranged, the fixing pieces are vertically arranged and are arc-shaped in the horizontal direction, the fixing pieces are oppositely and tightly adhered and fixed along the circumferential surface of the bridge pier, a gap for deformation is reserved between the two fixing pieces, the bridge pier fixing device also comprises a fastening bolt which is horizontally arranged corresponding to the gap position of the two fixing pieces and is used for generating the fastening deformation of the fixing pieces, a horizontal supporting platform is formed on the upper surface of the bridge pier fixing device, the lifting assembly comprises an upward jack which is arranged on the supporting platform along the circumferential direction of the bridge pier, the lifting assembly is characterized by further comprising a horizontal annular force equalizing ring, the force equalizing ring is sleeved outside a support at the upper end of the pier, the upper surface of the force equalizing ring is a jacking force applying surface connected with the bridge, and the lower surface of the force equalizing ring is a jacking force bearing surface connected with the upper end of a jack.
Like this, set up the homocline ring after, enlarged bridge jacking stress surface, can upwards transmit the bridge lower surface with the jacking force of jack evenly reliably better, improved the synchronism of jacking, can disperse the great jacking load of part on whole action face simultaneously, effectual reduction local stress prevents the local pressurized emergence of destroying of roof beam body bottom surface, improves jacking effect and stability.
Furthermore, the force-equalizing ring is formed by two semicircular annular stiffening plates, the end parts of the stiffening plates are provided with vertical edges for butt joint, and stiffening plate connecting bolts are arranged on the vertical edges to connect the two stiffening plates into the force-equalizing ring.
Therefore, the stress-equalizing ring is not required to be installed into a pier when a bridge construction facility is built, and the stress-equalizing ring is more convenient to install when the device is required to be installed.
Further, the stiffening plate is made of boiling steel. The jacking device is low in cost and good in strength, and the jacking synchronism can be better guaranteed.
Furthermore, the stiffening plate and the vertical edges thereof are an integral steel plate. The reinforcing plate is not welded, so that the welding residual stress and the residual deformation are reduced, and the flatness of the reinforcing plate is ensured.
Furthermore, the lower surface of the stiffening plate is provided with a plurality of stiffening ribs which are arranged along the diameter direction, the stiffening ribs are uniformly arranged along the circumferential direction, and the stiffening ribs have a certain width so that the contact area of the upper end of a single stiffening rib and the stiffening plate is larger than the area of the end surface of the upper end of the jack.
Therefore, the stiffening ribs can improve the rigidity of the stiffening plates and reduce deformation, and meanwhile, the stiffening ribs can be used as force application transition from the jacks to the stiffening plates, so that the jacking force of the jacks can be more uniformly distributed on the stiffening plates, and the jacking force application stability is better improved.
Furthermore, the contact position of the top surface of the jack and the stiffening ribs is correspondingly provided with a steel backing plate, and the upper surface of the steel backing plate is at least contacted with the two stiffening ribs.
Therefore, the upper end face of each jack can be in contact with two stiffening ribs at least, so that the jack is stressed more uniformly, and the overall stability of lifting and force application is better guaranteed.
Further, the stiffening ribs are obtained by welding steel bars to the bottom surface of the stiffening plate.
This ensures the strength between the reinforcing rib and the steel plate.
Further, among the pier fixing device, a plurality of application of force ribs that extend along the diameter direction level are arranged along circumference to stationary blade peripheral surface, and the application of force rib outer end that two stationary blades correspond corresponds respectively and connects at an arcuate adapter sleeve medial surface, and two adapter sleeve both ends tip have the fastening connection board that is used for the butt joint that outwards extends the formation along the diameter direction, leaves the interval that supplies the deformation between the relative fastening connection board, fastening bolt fixed connection is between per two relative fastening connection boards.
Therefore, when the pier fixing device is used, the fastening bolt is used for driving the fastening sleeve to generate inward compression deformation, and then the force of the compression deformation is converted into inward pressure applied to the fixing sheet along the diameter direction by virtue of the force applying rib, so that the fixing sheet is attached and fixed to the peripheral surface of the pier inwards. This kind of structure is compared with the mode of fastening bolt lug connection at the stationary blade tip among the prior art, current structure relies on fastening bolt directly to pull the stationary blade fastening deformation and laminating at pier circumferential surface, the deformation of stationary blade self can receive the hindrance of frictional force like this, the deformation effect that compresses tightly has been reduced, it is inhomogeneous to distribute owing to the deformation effect nonconformity can make the inside packing force size of stationary blade and direction equally, the deformation effect that is close to the fastening bolt position more is abundant the more so packing force big more, and the stationary blade packing force of keeping away from the fastening bolt position is less. In the pier fixing device, a suspended fastening sleeve is additionally arranged, and the fastening sleeve is pulled by a fastening bolt to deform and then converted into inward pressing force which is applied to the fixing sheet in the diameter direction by the force application rib. The fixed piece is pressed by the force application rib and then is tightly applied to the circumferential surface of the pier, so that the stress is inward applied along the diameter direction, and the stress direction is more balanced and consistent. Meanwhile, as the fastening sleeve is arranged in a spaced mode, the deformation of the fastening sleeve is not limited by friction force, so that the fastening bolt can enable the fastening sleeve to generate inward deformation better, and further enable the fastening bolt to generate larger and more uniform inward pressing force for the fixing sheet under the condition of the same fastening amount. Greatly improving the fastening effect and the stability of the device. In addition, the structure is further beneficial to forming of a supporting platform above the fixing device, and installation and support of the jack are facilitated.
Further, the fastening bolt is a high-strength bolt. This can improve the bolt fastening force even more.
Furthermore, the fixing piece, the force applying rib, the fastening sleeve and the fastening connecting plate are all made of steel materials. This can better ensure strength.
Further, the thickness of the fastening sleeve is larger than that of the fixing piece. The thickness of the fixing piece is smaller, friction force can be better improved, and the thickness of the fastening sleeve is larger, so that pressing force can be better provided by means of deformation. Make this device can firmly grasp pier top better, provide good frictional force counter-force for work platform to prevent the gliding in the jacking construction, can also make pier top concrete simultaneously and bear three-dimensional restraint state better, prevent that pier top concrete from damaging.
Further, the fastening connecting plate and the fastening sleeve are integrally cast. The integrity can be improved even better.
Furthermore, the force applying rib is welded and fixed with the outer surface of the fixing piece and the inner surface of the fastening sleeve. Therefore, the construction and the manufacture are more convenient, and the manufacturing cost is reduced.
Furthermore, the force application rib is of a vertical plate-shaped structure, and the upper end of the force application rib and the upper end of the fastening sleeve are positioned on the same horizontal plane. Therefore, the structure and the bearing of the supporting platform at the upper end of the pier fixing device are more convenient.
Furthermore, the force application rib and the upper end surface of the fastening sleeve are also provided with a support ring plate which is integrally in a horizontal annular shape, and the upper surface of the support ring plate forms a support platform and is used for mounting the jack.
Therefore, the supporting platform is formed by the supporting ring plate, so that the jack can be conveniently installed and stressed, and the overall stability of the device is improved.
Further, the supporting ring plate is made of steel materials. This can better ensure strength and stability.
Furthermore, the support ring plates are connected by connecting bolts after the two arc-shaped half ring plates are butted. Thus, the installation is more convenient.
In conclusion, the integral lifting system is special for the integral lifting system of the bridge body of the bridge with the lower structure without the cover beam, has the advantages of simple structure, good fixing effect and stability and convenient construction, can better realize synchronous jacking, can reduce the local stress at the action position of the jack to the minimum, and ensures the safe integral lifting equipment in the construction process. The jacking construction method can effectively improve the jacking construction effect and protect the construction safety.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a plan view of a fixed portion of an individual pier of fig. 1, in which a support ring plate is not shown.
Fig. 3 is a schematic top view of the individual stiffener plate of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings.
The most preferred embodiment is as follows: as shown in figures 1 to 3, a bridge girder lifting system installed on a bridge pier comprises a bridge pier fixing device and a lifting assembly, wherein the bridge pier fixing device comprises two fixing pieces 1 which are oppositely arranged, the fixing pieces 1 are vertically arranged and are arc-shaped in the horizontal direction, the fixing pieces 1 are oppositely closed and tightly fixed along the circumferential surface of the bridge pier 2, a gap for deformation is reserved between the two fixing pieces 1, the bridge pier fixing device further comprises a fastening bolt 3 which is horizontally arranged corresponding to the gap position of the two fixing pieces and is used for generating fastening deformation of the fixing pieces, a horizontal supporting platform is formed on the upper surface of the bridge pier fixing device, the lifting assembly comprises an upward jack 4 which is arranged on the supporting platform along the circumferential direction of the bridge pier, the lifting assembly further comprises a horizontal annular force-equalizing ring 5 which is integrally arranged, the force-equalizing ring 5 is sleeved outside a support at the upper end of the bridge pier, the upper surface of the force-equalizing, the lower surface of the force-equalizing ring 5 is a jacking stress surface connected with the upper end of the jack 4.
Like this, set up the homocline ring after, enlarged bridge jacking stress surface, can upwards transmit the bridge lower surface with the jacking force of jack evenly reliably better, improved the synchronism of jacking, can disperse the great jacking load of part on whole action face simultaneously, effectual reduction local stress prevents the local pressurized emergence of destroying of roof beam body bottom surface, improves jacking effect and stability.
The force-equalizing ring 5 is formed by two semicircular annular stiffening plates, the end parts of the stiffening plates are provided with vertical edges for butt joint, and stiffening plate connecting bolts are arranged on the vertical edges to connect the two stiffening plates into the force-equalizing ring 5.
Therefore, the stress-equalizing ring is not required to be installed into a pier when a bridge construction facility is built, and the stress-equalizing ring is more convenient to install when the device is required to be installed.
Wherein the stiffening plate is made of boiling steel. The jacking device is low in cost and good in strength, and the jacking synchronism can be better guaranteed.
Wherein, the stiffening plate and the vertical edge thereof are an integral steel plate. The reinforcing plate is not welded, so that the welding residual stress and the residual deformation are reduced, and the flatness of the reinforcing plate is ensured.
The lower surface of the stiffening plate is provided with a plurality of stiffening ribs 7 which are arranged along the diameter direction, the stiffening ribs 7 are uniformly arranged along the circumferential direction, and the stiffening ribs have a certain width so that the contact area of the upper end of a single stiffening rib and the stiffening plate is larger than the area of the end surface of the upper end of the jack.
Therefore, the stiffening ribs can improve the rigidity of the stiffening plates and reduce deformation, and meanwhile, the stiffening ribs can be used as force application transition from the jacks to the stiffening plates, so that the jacking force of the jacks can be more uniformly distributed on the stiffening plates, and the jacking force application stability is better improved.
Wherein, the position that jack top surface and stiffening rib contacted corresponds is provided with steel backing plate 8, and 8 upper surfaces of steel backing plate contact with two stiffening ribs at least.
Therefore, the end face of the upper end of each jack 4 can be in contact with at least two stiffening ribs, so that the jack is stressed more uniformly, and the overall stability of lifting and force application is better ensured.
Wherein the stiffening ribs 7 are obtained by welding steel bars to the bottom surface of the stiffening plate.
This ensures the strength between the reinforcing rib and the steel plate.
Among the pier fixing device, 1 peripheral surface of stationary blade has arranged a plurality of along the outside application of force ribs 9 that extend of diameter direction level along circumference, and the application of force rib 9 outer end that two stationary blades 1 correspond is corresponding respectively and is connected at an arcuate adapter sleeve 10 medial surface, and two adapter sleeve 10 both ends tip have along the outside fastening connection board that is used for the butt joint that extends the formation of diameter direction, leaves the interval that supplies to warp between the relative fastening connection board, 3 fixed connection of fastening bolt are between per two relative fastening connection boards.
Therefore, when the pier fixing device is used, the fastening bolt is used for driving the fastening sleeve to generate inward compression deformation, and then the force of the compression deformation is converted into inward pressure applied to the fixing sheet along the diameter direction by virtue of the force applying rib, so that the fixing sheet is attached and fixed to the peripheral surface of the pier inwards. This kind of structure is compared with the mode of fastening bolt lug connection at the stationary blade tip among the prior art, current structure relies on fastening bolt directly to pull the stationary blade fastening deformation and laminating at pier circumferential surface, the deformation of stationary blade self can receive the hindrance of frictional force like this, the deformation effect that compresses tightly has been reduced, it is inhomogeneous to distribute owing to the deformation effect nonconformity can make the inside packing force size of stationary blade and direction equally, the deformation effect that is close to the fastening bolt position more is abundant the more so packing force big more, and the stationary blade packing force of keeping away from the fastening bolt position is less. In the pier fixing device, a suspended fastening sleeve is additionally arranged, and the fastening sleeve is pulled by a fastening bolt to deform and then converted into inward pressing force which is applied to the fixing sheet in the diameter direction by the force application rib. The fixed piece is pressed by the force application rib and then is tightly applied to the circumferential surface of the pier, so that the stress is inward applied along the diameter direction, and the stress direction is more balanced and consistent. Meanwhile, as the fastening sleeve is arranged in a spaced mode, the deformation of the fastening sleeve is not limited by friction force, so that the fastening bolt can enable the fastening sleeve to generate inward deformation better, and further enable the fastening bolt to generate larger and more uniform inward pressing force for the fixing sheet under the condition of the same fastening amount. Greatly improving the fastening effect and the stability of the device. In addition, the structure is further beneficial to forming of a supporting platform above the fixing device, and installation and support of the jack are facilitated.
Wherein the fastening bolt 3 is a high-strength bolt. This can improve the bolt fastening force even more.
Wherein, the fixing piece, the force applying rib, the fastening sleeve and the fastening connecting plate are all made of steel materials. This can better ensure strength.
Wherein, the thickness of the fastening sleeve 10 is larger than that of the fixing piece 1. The thickness of the fixing piece is smaller, friction force can be better improved, and the thickness of the fastening sleeve is larger, so that pressing force can be better provided by means of deformation. Make this device can firmly grasp pier top better, provide good frictional force counter-force for work platform to prevent the gliding in the jacking construction, can also make pier top concrete simultaneously and bear three-dimensional restraint state better, prevent that pier top concrete from damaging.
Wherein the fastening connection plate and the fastening sleeve 10 are integrally cast. The integrity can be improved even better.
Wherein, the force applying rib 9 is welded and fixed with the outer surface of the fixing piece 1 and the inner surface of the fastening sleeve 10. Therefore, the construction and the manufacture are more convenient, and the manufacturing cost is reduced.
Wherein, the force application rib 9 is a vertical plate-shaped structure, and the upper end of the force application rib 9 and the upper end of the fastening sleeve 10 are in the same horizontal plane. Therefore, the structure and the bearing of the supporting platform at the upper end of the pier fixing device are more convenient.
Wherein, the upper end surfaces of the force application rib 9 and the fastening sleeve 10 are also provided with a supporting ring plate 11 which is integrally in a horizontal ring shape, and the upper surface of the supporting ring plate 11 forms a supporting platform and is used for installing a jack.
Therefore, the supporting platform is formed by the supporting ring plate, so that the jack can be conveniently installed and stressed, and the overall stability of the device is improved.
Wherein, the supporting ring plate 11 is made of steel material. This can better ensure strength and stability.
Wherein, the support ring plate 11 is obtained by connecting two arc semi-ring plates by connecting bolts after butt joint. Thus, the installation is more convenient.
Claims (8)
1. A bridge girder body lifting system installed on a bridge pier comprises a bridge pier fixing device and a lifting assembly, wherein the bridge pier fixing device comprises two fixing pieces which are oppositely arranged, the fixing pieces are vertically arranged and are arc-shaped in the horizontal direction, the fixing pieces are oppositely and tightly adhered and fixed along the circumferential surface of the bridge pier, a gap for deformation is reserved between the two fixing pieces, the bridge pier fixing device also comprises a fastening bolt which is horizontally arranged corresponding to the gap position of the two fixing pieces and is used for generating the fastening deformation of the fixing pieces, a horizontal supporting platform is formed on the upper surface of the bridge pier fixing device, the lifting assembly comprises an upward jack which is arranged on the supporting platform along the circumferential direction of the bridge pier, the lifting assembly is characterized by further comprising a force equalizing ring which is in a horizontal annular shape as a whole, the force equalizing ring is sleeved outside a support at the upper end of the pier, the upper surface of the force equalizing ring is a jacking force application surface connected with the bridge, and the lower surface of the force equalizing ring is a jacking force application surface connected with the upper end of a jack;
the force-equalizing ring is formed by two semicircular stiffening plates, the end parts of the stiffening plates are provided with vertical edges for butt joint, and stiffening plate connecting bolts are arranged on the vertical edges to connect the two stiffening plates into the force-equalizing ring;
among the pier fixing device, the stationary blade peripheral surface has arranged a plurality of along the outside application of force ribs that extend of diameter direction level along circumference, and the application of force rib outer end that two stationary blades correspond corresponds respectively and connects at a curved adapter sleeve medial surface, and two adapter sleeve both ends tip have the fastening connection board that is used for the butt joint that outwards extends the formation along diameter direction, leave the interval that supplies the deformation between the fastening connection board relatively, fastening bolt fixed connection is between per two relative fastening connection boards.
2. The bridge girder lifting system according to claim 1, wherein the lower surface of the stiffener is provided with a plurality of stiffeners arranged in a diameter direction, the stiffeners are uniformly arranged in a circumferential direction, and the stiffeners have a width such that the contact area between the upper ends of the individual stiffeners and the stiffener is larger than the area of the upper end surfaces of the jacks.
3. The bridge girder lifting system according to claim 2, wherein a steel pad plate is provided at a position where the top surface of the jack contacts the reinforcing ribs, and an upper surface of the steel pad plate contacts at least two of the reinforcing ribs.
4. The bridge girder lifting system installed on a pier according to claim 2, wherein the stiffener is obtained by welding a steel bar to the bottom surface of the stiffener.
5. The bridge girder lifting system installed on a pier according to claim 1, wherein the fixing pieces, the force applying ribs, the fastening sleeves, and the fastening connection plates are made of steel material.
6. The bridge girder lifting system installed on a pier according to claim 5, wherein the fastening sleeve has a thickness greater than that of the fastening plate.
7. The bridge girder lifting system according to claim 5, wherein the force application rib and the upper end surface of the fastening sleeve are further supported by a support ring plate having a horizontal ring shape as a whole, and the upper surface of the support ring plate forms a support platform for mounting the jack.
8. The bridge girder lifting system according to claim 7, wherein the support ring plates are coupled to each other by means of coupling bolts after the two arc-shaped half ring plates are coupled to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027380.2A CN109024316B (en) | 2018-09-04 | 2018-09-04 | Bridge body lifting system installed on bridge pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027380.2A CN109024316B (en) | 2018-09-04 | 2018-09-04 | Bridge body lifting system installed on bridge pier |
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| Publication Number | Publication Date |
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| CN109024316A CN109024316A (en) | 2018-12-18 |
| CN109024316B true CN109024316B (en) | 2020-07-28 |
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| CN201811027380.2A Expired - Fee Related CN109024316B (en) | 2018-09-04 | 2018-09-04 | Bridge body lifting system installed on bridge pier |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109778680A (en) * | 2019-02-27 | 2019-05-21 | 长安大学 | A kind of bridge pier anti-freeze expansion system and frost heave stress monitoring method |
| CN110700113B (en) * | 2019-11-05 | 2020-06-23 | 中建交通建设集团有限公司 | Construction method of prestress applying device of non-prestressed beam bridge |
| CN112985565A (en) * | 2021-02-03 | 2021-06-18 | 中铁工程设计咨询集团有限公司 | Bridge weighing method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2424230Y (en) * | 2000-05-25 | 2001-03-21 | 徐斌 | Maintenance appts. for bridge abutment |
| CN1230590C (en) * | 2003-08-28 | 2005-12-07 | 徐斌 | Maintenance equipment for bridge |
| KR20060099484A (en) * | 2006-08-21 | 2006-09-19 | 주식회사 신화 엠앤씨 | The use shelf with chemical anchor and high tention long bolt for bridge deck lifting method |
| JP4963476B2 (en) * | 2008-01-31 | 2012-06-27 | 株式会社Ｉｈｉインフラシステム | Replacement method of slip resin plate for bridge support |
| CN102733320B (en) * | 2012-06-21 | 2014-08-06 | 河海大学 | Pier annular bracket type column embracing beam for jacking bridge |
| CN204715225U (en) * | 2015-05-31 | 2015-10-21 | 西安公路研究院 | A kind of bridge jacking platform based on steel hoop |
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Granted publication date: 20200728 Termination date: 20210904 |