CN109056559B - Bridge body lifting method based on bent cap - Google Patents
Bridge body lifting method based on bent cap Download PDFInfo
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- CN109056559B CN109056559B CN201811025785.2A CN201811025785A CN109056559B CN 109056559 B CN109056559 B CN 109056559B CN 201811025785 A CN201811025785 A CN 201811025785A CN 109056559 B CN109056559 B CN 109056559B
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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 body lifting method based on a capping beam, which comprises the step of installing bridge lifting equipment between the capping beam and a bridge, wherein the bridge lifting equipment is provided with two butt joint parts which are oppositely arranged at left and right and are fixedly connected to the capping beam in an encircling manner, the outer parts of two sides of each butt joint part are fixedly provided with a supporting platform, and the bridge body lifting method also comprises the step of realizing the bridge body lifting by a jack on the supporting platform. The invention can effectively avoid the damage of the bent cap at the position where the bridge jacking equipment is installed due to overlarge stress, improve the safety of the device and better ensure the smooth lifting of the bridge body. And further, the synchronous jacking can be better realized to ensure the safety in the construction process.
Description
Technical Field
The invention relates to the field of highway bridge engineering, in particular to a bridge body lifting method based on a cover beam.
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 PLC synchronous jacking method which is commonly used in China at present is adopted, 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 large stress is often caused, and even accidents of bridge damage and people death are caused. Therefore, how to design a jacking device which can better realize synchronous jacking and can reduce the local stress at the jacking position to the minimum, ensures the safety in the construction process and becomes the problem to be considered and solved.
CN105735149A discloses a bridge jacking counterforce device suitable for narrow space between a beam bottom and a capping beam, wherein the counterforce device comprises two bearing beams transversely crossing over the capping beam, a platform structure installed on two sides of the bearing beams, a high-strength bolt hoop used for connecting the bearing beams and the platform structure, and a holding device used for fixing the whole device and the capping beam. Two load beams cross in the narrow and small space between beam slab and the bent cap, are reliably connected with the platform structure through high-strength bolt hoop on the load beam, and whole counterforce device is reliably connected with the bent cap through holding tightly the device, and the jack is put alright carry out the bridge jacking operation on the platform of both sides.
The device of this patent has that the device dead weight is little, bearing capacity is high, wide advantage of application, uses and to save a large amount of manpower and material resources in narrow and small space hollow slab bridge jacking between the breast and the bent cap. 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. The structure for fixing the bent cap is poor in reliability and stability. 3. In the jacking process, the stress of the jack is directly applied to the bent cap, and the jack is installed at a position which is generally staggered with the support on the bent cap, so that the bent cap at the position of the jack is easily damaged due to the overlarge acting force, and the use safety of the device is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention mainly solves the technical problems that: how to provide a bridge body lifting method that can accomplish application of force conversion in the bridge body lifting process and avoid the bent cap atress too big and damage, improve device security.
In order to solve the technical problems, the invention adopts the following technical scheme:
the bridge body lifting method based on the bent cap comprises the step of installing bridge lifting equipment between the bent cap and a bridge, wherein the bridge lifting equipment is provided with two butt joint parts which are oppositely folded and are fixedly connected to the bent cap in a clasping mode, the outer side portions of the two butt joint parts are fixed to form a supporting platform, and the bridge lifting equipment further comprises the step of realizing the lifting of the bridge body by a jack on the supporting platform.
Therefore, the cover beam at the position where the bridge jacking equipment is installed can be effectively prevented from being damaged due to overlarge stress, the safety of the device is improved, and the bridge body can be better ensured to be smoothly lifted.
Furthermore, the bridge jacking equipment comprises a cover beam fixing device and a lifting assembly, the cover beam fixing device is fixed on the cover beam and is provided with two supporting platforms formed on two sides of the cover beam in the width direction, the lifting assembly comprises a jack arranged on the supporting platforms, the cover beam fixing device comprises two fixing plates, the fixing plates are arranged on the left side and the right side of the cover beam in a laminating manner, a horizontal bending part which extends backwards along the upper surface of the cover beam towards the middle position relative to the horizontal bending part is arranged at the upper end of each fixing plate, a gap for tensioning is reserved between the end parts of the horizontal bending parts of the two fixing plates, the end parts of the horizontal bending parts of the two fixing plates are also provided with butt joint parts extending upwards, an upper tensioning bolt is arranged between the butt joint parts for connecting, the lower ends of the two fixing plates exceed the lower surface of the cover beam downwards and are provided with horizontal lower tensioning bolts for connecting, and the outer sides, the upper surface of the flange plate forms a supporting platform.
Therefore, in the bent cap fixing device, the two inverted L-shaped fixing plates are buckled on the left side and the right side of the bent cap, and then are fixed and tensioned by the upper tensioning bolt and the lower tensioning bolt, so that the structure and the bent cap are tightly clamped, the fixed connection with the bent cap and the tight bearing are realized, and the stability of the supporting platform is ensured. Compare with the bent cap fixed knot structure that discloses in the CN105735149A patent, need not the connecting bolt of vertical setting, it is still less to adopt the component, and the structure is simpler, and the installation is more convenient, and structural integrity is better, and stability is higher.
Further, the fixing plate is of an integrally cast and formed steel plate structure. Thus, structural integrity and strength are improved, and fixation reliability is improved.
Furthermore, an oblique supporting component is fixedly arranged between the lower surface of the flange plate and the outer side surface of the fixing plate below the flange plate to form a triangular oblique supporting structure.
Therefore, the structural strength of the supporting platform can be better improved, the supporting reliability is improved, and the construction safety is ensured.
Further, the oblique supporting member is obtained by welding and fixing angle steel. Has the advantages of simple structure, reliable strength and convenient construction.
Further, the upper tensioning bolt and the lower tensioning bolt are high-strength bolts. The load can be better borne, and the stability is improved.
Furthermore, a horizontal bearing plate is arranged between the lower surface of the cover beam and the lower tightening bolt, and the left end and the right end of the horizontal bearing plate are attached to the inner side surface of the fixing plate.
Therefore, the horizontal bearing plate enables downward reaction force generated when the jack works on the supporting platform to act on the lower end of the fixing plate through the inclined supporting member and decompose the downward reaction force into inward pressure, the pressure acts on the horizontal bearing plate firstly and can be offset by the horizontal bearing plate and converted into the internal stress of the horizontal bearing plate, and then the situation that the two sides (especially the lower end positions of the two sides) of the cover beam are excessively stressed to cause deformation or damage of the cover beam per se to influence the supporting stability of the device is avoided.
Furthermore, the horizontal bearing plate is a steel plate which is horizontally arranged, so that the supporting strength is higher, and the bearing conversion effect is better.
And furthermore, the horizontal bearing plate is an elastic steel plate with the middle part protruding upwards to form an arc shape, and the upper surface of the middle part is attached to the lower surface of the cover beam.
Therefore, when the jack is installed, the fixed plate is ensured to be installed and fixed, and the jack installation position is arranged in the bridge width direction in a staggered mode with the support connected between the cover beam and the bridge beam body in a supporting mode. Therefore, when the jack works, the stress position of the local part of the cover beam under the downward pressure of the bridge can be changed, and the cover beam is possibly subjected to overlarge pressure to generate downward bending deformation. So adopt behind the horizontal bearing plate of this structure, when horizontal bearing plate both sides pressurized, can lead to producing ascending deformation, turn into the ascending jacking force that applys the bent cap with the pressure that both sides received, and then make this jacking force and bent cap offset because of the local decurrent pressure that the jack effect produced, avoid the bent cap to receive the jack effect position to produce too big downward deformation and influence device support stability.
Furthermore, the left end and the right end of the horizontal bearing plate are arranged opposite to the lower end of the oblique supporting member. So that the above effects are maximized.
Preferably, the jacks are arranged on the two supporting platforms along the length direction of the cover beam to form two rows, and the upper part of each row of jacks is connected with the bridge beam body through a stiffening beam arranged transversely along the bridge.
Like this, stiffening beam's setting both can prevent because asynchronous jacking phenomenon that accidents such as jack equipment damage, oil leak caused, can reduce the shear stress of hinge joint department and the local stress of jack effect position department again, improves the intensity of bent cap in the work progress.
Preferably, the stiffening beam is made of horizontally arranged I-shaped steel, the middle connecting plate part of the I-shaped steel is vertically arranged, the lower end face is connected with the upper end of the jack, and the upper end face is connected with the lower surface of the bridge body in a fitting manner.
Therefore, the stiffening beam is obtained by adopting the I-shaped steel, the I-shaped steel is a standard component, the production, the installation and the construction cost are convenient, the I-shaped steel has an upper bearing surface and a lower bearing surface, the I-shaped steel is suitable for a stress structure at the position, and the supporting stability can be improved.
Furthermore, a metal backing plate is arranged between the I-shaped steel and the upper end of the jack. So as to better transfer gravity and improve the support stability.
Furthermore, the bent cap fixing devices are arranged at intervals along the support above the bent cap, the jacks of the bent cap fixing devices are integrally arranged into two rows, and the stiffening beams are formed by connecting end parts of the multi-section I-shaped steel in a butt joint mode.
Therefore, the installation of the bent cap fixing device is more convenient by staggering the position of the support. The length of the structure in the width direction of the bridge can be better prolonged, and the supporting and jacking of the bridge body can be better realized.
Furthermore, two butt joint plates are clamped at the butt joint of each section of I-shaped steel, and the butt joint plates are attached to two sides of the middle connecting plate part of the I-shaped steel and are fixedly connected in a penetrating mode through bolts.
Simple structure like this, connect reliable and stable, it conveniently realizes the extension of I shaped steel and connects in order to form stiffening beam.
Further, a transverse connecting component is arranged between the two stiffening beams and is fixedly connected transversely.
Therefore, the two stiffening beams are fixedly connected into a whole, and the stress integrity of the stiffening beams on the two sides of the bent cap is better improved.
Further, horizontal coupling assembling includes the scalable connecting rod that sets up of level, and the connecting rod is that two mutual sliding fit cover establish the sleeve pipe and constitute, and the connecting rod both ends are fixed on the stiffening beam.
Therefore, the connecting rod does not influence the bearing transmission in the vertical direction, can freely stretch in the horizontal direction, can be adjusted in a stretching mode according to the size of the cover beam and the installation position of the jack, and is more convenient to use.
Furthermore, the outer sleeve surface penetrates through a fastening threaded hole at the matching position of the two sleeves in the connecting rod, a fastening bolt is screwed in the fastening threaded hole, and the inner end of the fastening bolt is abutted against the inner sleeve to fix the relative position of the two sleeves.
Therefore, the sleeve is lengthened or shortened, and after the target length is reached, the sleeve can be screwed down through the fastening bolt, so that the sleeve cannot stretch out and draw back, and the effect of improving the transverse stability is achieved.
Furthermore, the fastening threaded holes in the sleeve and the corresponding fastening bolts are arranged in two groups and are arranged along the same straight line direction.
Therefore, the integrity of the connecting rod in the horizontal direction can be better ensured after the sleeve is adjusted in place and fixed.
Furthermore, the end part of the connecting rod is fixedly welded with a vertical connecting block, and the connecting block is fixedly connected to the middle connecting plate of the stiffening beam I-shaped steel through a horizontal bolt.
Therefore, the connecting rod is convenient to connect and fix, and the overall bearing stability and reliability are improved.
Further, the connecting block is rectangular and is connected with the intermediate connecting plate of the I-shaped steel through bolts arranged at four corners.
Thus, the reliability of the end fixing of the connecting rod is improved.
Furthermore, each section of I-shaped steel is at least connected with two connecting rods. The horizontal bearing integrity can be better improved.
In conclusion, the bridge jacking device can effectively avoid the damage of the cover beam at the position where the bridge jacking equipment is installed due to overlarge stress, improve the safety of the device and better ensure the smooth lifting of the bridge body. And further have and can realize synchronous jacking better, and can fall to the minimum with the shear stress of hinge joint department and the local stress of jack effect position department, guarantee the effect of security in the work progress.
Drawings
Fig. 1 is a schematic view of the overall structure of the bridge lifting device installed in the implementation of the invention.
Fig. 2 is a top view of the individual bridge jacking equipment part of fig. 1.
Figure 3 is a side view of a single set of the capping beam fixture and lift assembly of figure 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: a bridge body lifting method based on a capping beam comprises the step of installing bridge lifting equipment between the capping beam and a bridge, wherein the bridge lifting equipment is provided with two butt joint parts which are oppositely jointed and are fixedly connected to the capping beam from left to right, the outer side parts of the two butt joint parts are both fixedly formed into a supporting platform, and the bridge lifting equipment also comprises the step of realizing the lifting of the bridge body by a jack on the supporting platform.
Therefore, the cover beam at the position where the bridge jacking equipment is installed can be effectively prevented from being damaged due to overlarge stress, the safety of the device is improved, and the bridge body can be better ensured to be smoothly lifted.
In this embodiment, the bridge jacking apparatus is as shown in fig. 1 to 3, and includes a capping beam fixing device and a lifting assembly, the capping beam fixing device is fixed on the capping beam 1 and has two supporting platforms formed on both sides of the capping beam 1 in the width direction, the lifting assembly includes a jack 2 disposed on the supporting platforms, wherein the capping beam fixing device includes two fixing plates 4, the fixing plates 4 are attached to both sides of the capping beam, the upper ends of the two fixing plates 4 have a horizontal bending portion extending from the upper surface of the capping beam to the middle position in a horizontal bending direction, a gap for tensioning is left between the ends of the horizontal bending portion of the two fixing plates 4, the ends of the horizontal bending portion of the two fixing plates 4 further have an abutting portion extending upward, an upper tensioning bolt 5 is disposed between the abutting portions and connected, the lower ends of the two fixing plates 4 extend downward beyond the lower surface of the capping beam and are connected by a horizontal lower tensioning bolt 6, the outer sides of the two fixing plates are provided with flange plates 7 extending outwards horizontally, and the upper surfaces of the flange plates 7 form a supporting platform.
Therefore, in the bent cap fixing device, the two inverted L-shaped fixing plates are buckled on the left side and the right side of the bent cap, and then are fixed and tensioned by the upper tensioning bolt and the lower tensioning bolt, so that the structure and the bent cap are tightly clamped, the fixed connection with the bent cap and the tight bearing are realized, and the stability of the supporting platform is ensured. Compare with the bent cap fixed knot structure that discloses in the CN105735149A patent, need not the connecting bolt of vertical setting, it is still less to adopt the component, and the structure is simpler, and the installation is more convenient, and structural integrity is better, and stability is higher.
Wherein, the fixing plate 4 is a steel plate structure formed by integral casting. Thus, structural integrity and strength are improved, and fixation reliability is improved.
Wherein, an oblique supporting component 8 is fixedly arranged between the lower surface of the flange plate 7 and the outer side surface of the fixing plate below to form a triangular inclined strut structure.
Therefore, the structural strength of the supporting platform can be better improved, the supporting reliability is improved, and the construction safety is ensured.
Wherein, the diagonal bracing member 8 is obtained by angle steel welding and fixing. Has the advantages of simple structure, reliable strength and convenient construction.
Wherein, the upper tensioning bolt 5 and the lower tensioning bolt 6 are high-strength bolts. The load can be better borne, and the stability is improved.
Wherein, still be provided with horizontal bearing plate 9 between bent cap 1 lower surface and the lower fastening bolt, both ends and fixed plate medial surface paste mutually and set up about horizontal bearing plate 9.
Therefore, the horizontal bearing plate enables downward reaction force generated when the jack works on the supporting platform to act on the lower end of the fixing plate through the inclined supporting member and decompose the downward reaction force into inward pressure, the pressure acts on the horizontal bearing plate firstly and can be offset by the horizontal bearing plate and converted into the internal stress of the horizontal bearing plate, and then the situation that the two sides (especially the lower end positions of the two sides) of the cover beam are excessively stressed to cause deformation or damage of the cover beam per se to influence the supporting stability of the device is avoided.
In this embodiment, the horizontal force-bearing plate 9 is an elastic steel plate with a convex middle part in an arc shape, and the upper surface of the middle part is attached to the lower surface of the cover beam.
Therefore, when the jack is installed, the fixed plate is ensured to be installed and fixed, and the jack installation position is arranged in the bridge width direction in a staggered mode with the support connected between the cover beam and the bridge beam body in a supporting mode. Therefore, when the jack works, the stress position of the local part of the cover beam under the downward pressure of the bridge can be changed, and the cover beam is possibly subjected to overlarge pressure to generate downward bending deformation. So adopt behind the horizontal bearing plate of this structure, when horizontal bearing plate both sides pressurized, can lead to producing ascending deformation, turn into the ascending jacking force that applys the bent cap with the pressure that both sides received, and then make this jacking force and bent cap offset because of the local decurrent pressure that the jack effect produced, avoid the bent cap to receive the jack effect position to produce too big downward deformation and influence device support stability. In addition, in the implementation mode, the horizontal bearing plate can also be a steel plate arranged horizontally, so that the supporting strength is higher, and the bearing conversion effect is better.
Wherein, the left and right ends of the horizontal bearing plate 9 are opposite to the lower end of the oblique supporting component 8. So that the above effects are maximized.
The jacks 2 are arranged on the two supporting platforms along the length direction of the cover beam to form two rows, and the upper part of each row of jacks 2 is connected with the bridge beam body 3 through a stiffening beam transversely arranged along the bridge.
Like this, stiffening beam's setting both can prevent because asynchronous jacking phenomenon that accidents such as jack equipment damage, oil leak caused, can reduce the shear stress of hinge joint department and the local stress of jack effect position department again, improves the intensity of bent cap in the work progress.
The stiffening beam is obtained by horizontally arranging I-shaped steel 10, the middle connecting plate part of the I-shaped steel 10 is vertically arranged, the lower end face is connected with the upper end of the jack 2, and the upper end face is connected with the lower surface of the bridge beam body 3 in a fitting manner.
Therefore, the stiffening beam is obtained by adopting the I-shaped steel 10, the I-shaped steel is a standard component, the production, the installation and the construction cost are convenient, the I-shaped steel has an upper bearing surface and a lower bearing surface, the I-shaped steel is suitable for a stress structure at the position, and the supporting stability can be improved.
Wherein, a metal backing plate 11 is also arranged between the I-shaped steel 10 and the upper end of the jack 2. So as to better transfer gravity and improve the support stability.
The bent cap fixing devices are arranged at intervals along the supporting seats above the bent cap, the jacks of the bent cap fixing devices are integrally arranged into two rows, and the stiffening beams are formed by connecting end parts of the multi-section I-shaped steel in a butt joint mode.
Therefore, the installation of the bent cap fixing device is more convenient by staggering the position of the support. The length of the structure in the width direction of the bridge can be better prolonged, and the supporting and jacking of the bridge body can be better realized.
Wherein, every section I-shaped steel 10 butt joint department presss from both sides and is equipped with two butt joint boards 12, and butt joint board 12 laminating is to wearing fixed connection in the both sides of I-shaped steel intermediate junction plate portion and relying on the bolt.
Simple structure like this, connect reliable and stable, it conveniently realizes the extension of I shaped steel and connects in order to form stiffening beam.
Wherein, a transverse connecting component which is transversely fixedly connected is arranged between the two stiffening beams.
Therefore, the two stiffening beams are fixedly connected into a whole, and the stress integrity of the stiffening beams on the two sides of the bent cap is better improved.
Wherein, horizontal coupling assembling includes the scalable connecting rod 13 that sets up of level, and connecting rod 13 is two sleeve pipes that sliding fit cover was established each other and constitutes, and connecting rod 13 both ends are fixed on the stiffening beam.
Therefore, the connecting rod does not influence the bearing transmission in the vertical direction, can freely stretch in the horizontal direction, can be adjusted in a stretching mode according to the size of the cover beam and the installation position of the jack, and is more convenient to use.
Wherein, two sleeve pipe cooperations in connecting rod 13 are located, and outside sleeve pipe surface runs through and is provided with the fastening screw hole, and fastening screw hole internal rotation connects the cooperation to have fastening bolt 14, and fastening bolt 14 inner and inside sleeve pipe offset realize two sleeve pipe relative position's fixed.
Therefore, the sleeve is lengthened or shortened, and after the target length is reached, the sleeve can be screwed down through the fastening bolt, so that the sleeve cannot stretch out and draw back, and the effect of improving the transverse stability is achieved.
Wherein, the fastening screw holes on the sleeve and the corresponding fastening bolts 14 are provided with two groups and arranged along the same straight line direction.
Therefore, the integrity of the connecting rod in the horizontal direction can be better ensured after the sleeve is adjusted in place and fixed.
Wherein, connecting rod 13 tip welded fastening has vertical connecting block 15, and connecting block 15 passes through the horizontally bolt fixed connection on the intermediate junction plate of stiffening beam I shaped steel.
Therefore, the connecting rod is convenient to connect and fix, and the overall bearing stability and reliability are improved.
Wherein, the connecting block 15 is rectangular and is connected with the intermediate connecting plate of the I-shaped steel through bolts arranged at four corners.
Thus, the reliability of the end fixing of the connecting rod is improved.
Wherein each section of the I-shaped steel 10 is at least connected with two connecting rods 13. The horizontal bearing integrity can be better improved.
Claims (9)
1. A bridge body lifting method based on a bent cap comprises the steps of installing bridge lifting equipment between the bent cap and a bridge, wherein the bridge lifting equipment is provided with two butt joint parts which are oppositely folded and are fixedly connected to the bent cap in a wrapping mode from left to right, the outer side parts of the two butt joint parts are fixedly formed into a supporting platform, and the bridge lifting equipment also comprises the step of realizing the lifting of the bridge body by a jack on the supporting platform;
the bridge jacking equipment comprises a cover beam fixing device and a lifting assembly, wherein the cover beam fixing device is fixed on a cover beam and is provided with two supporting platforms formed on two sides of the cover beam in the width direction, the lifting assembly comprises a jack arranged on the supporting platforms, the cover beam fixing device comprises two fixing plates, the fixing plates are arranged on the left side and the right side of the cover beam in a fitting manner, a horizontal bending part which extends backwards along the upper surface of the cover beam towards the middle position in a relatively horizontal bending manner is arranged at the upper end of each fixing plate, a gap for tensioning is reserved between the end parts of the horizontal bending parts of the two fixing plates, the end parts of the horizontal bending parts of the two fixing plates are also provided with butt joint parts which extend upwards, upper tensioning bolts are arranged between the butt joint parts and are connected, the lower ends of the two fixing plates exceed the lower surface of the cover beam downwards and are provided with horizontal lower tensioning bolts which are connected, the upper surface of the flange plate forms a supporting platform;
and a horizontal bearing plate is also arranged between the lower surface of the cover beam and the lower tightening bolt, and the left end and the right end of the horizontal bearing plate are attached to the inner side surface of the fixed plate.
2. The method of claim 1, wherein the anchor plate is a unitary cast steel plate structure.
3. The method for lifting a bridge girder based on a cap beam of claim 1, wherein an inclined support member is further fixedly disposed between the lower surface of the flange plate and the outer side surface of the lower fixing plate to form a triangular inclined support structure.
4. The method for lifting a bridge girder based on a cap beam of claim 3, wherein the diagonal support member is fixed by welding with angle iron.
5. The method for lifting a bridge body based on a cover beam of claim 1, wherein the horizontal bearing plate is an elastic steel plate with a convex arc-shaped middle part, and the upper surface of the middle part is attached to the lower surface of the cover beam.
6. The method for lifting a bridge girder based on a bent cap according to claim 1, wherein the plurality of jacks are arranged on two supporting platforms along the length direction of the bent cap to form two rows, and the jacks in each row are connected with the bridge girder through a stiffening girder arranged transversely along the bridge;
the stiffening beam is obtained for the I-shaped steel that the level set up, I-shaped steel intermediate junction plate part is vertical to be set up and makes terminal surface and jack upper end meet down, and the laminating of up end and bridge roof beam body lower surface meets.
7. The method for lifting a bridge girder based on cap girders according to claim 6, wherein the cap girder fixing means are provided in plurality at intervals along the upper support of the cap girder, the jacks of the plurality of cap girder fixing means are integrally arranged in two rows, and the stiffening girder is formed by butt-joining the ends of the multi-sectional I-shaped steel.
8. The method for lifting a bridge beam based on a bent cap as claimed in claim 7, wherein two butt plates are clamped at the butt joint of each section of I-shaped steel, and the butt plates are attached to two sides of the middle connecting plate part of the I-shaped steel and fixedly connected by bolts in a penetrating manner.
9. The method of claim 7, wherein the two stiffening beams have a transverse connecting member for transverse fixed connection therebetween;
the transverse connecting assembly comprises a connecting rod which is horizontally and telescopically arranged, the connecting rod consists of two sleeves which can be mutually matched and sleeved in a sliding way, and two ends of the connecting rod are fixed on the stiffening beam;
two sleeve pipe cooperations department in the connecting rod, outside sleeve pipe surface runs through and is provided with the fastening screw hole, and the cooperation of fastening screw downthehole grafting has fastening bolt, and fastening bolt inner and inside sleeve pipe counterbalance realize the fixed to two sleeve pipe relative positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025785.2A CN109056559B (en) | 2018-09-04 | 2018-09-04 | Bridge body lifting method based on bent cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811025785.2A CN109056559B (en) | 2018-09-04 | 2018-09-04 | Bridge body lifting method based on bent cap |
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| Publication Number | Publication Date |
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| CN109056559A CN109056559A (en) | 2018-12-21 |
| CN109056559B true CN109056559B (en) | 2020-09-22 |
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| CN111733866A (en) * | 2020-05-16 | 2020-10-02 | 江苏瑞沃建设集团有限公司 | Pile foundation underpinning structure for newly-built urban tunnel below bridge |
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| KR20030093680A (en) * | 2002-06-05 | 2003-12-11 | 브이에스엘코리아 주식회사 | The construction method of double-t girder bridge by underslung movable scaffolding system |
| KR100661375B1 (en) * | 2005-09-10 | 2006-12-27 | 김진성 | Support braket structure for port bearing of bridge |
| CN105369745A (en) * | 2014-08-26 | 2016-03-02 | 葛洲坝集团第五工程有限公司 | Bridge support exchanging and lifting reaction frame |
| CN204940142U (en) * | 2015-08-18 | 2016-01-06 | 顾建华 | A kind of bridge jacking support |
| CN105735149A (en) * | 2016-03-04 | 2016-07-06 | 中交路桥（北京）科技有限公司 | Bridge jacking counter-force device suitable for narrow and small space between beam bottom and cover beam |
| CN107700343A (en) * | 2017-11-17 | 2018-02-16 | 宿迁市鹏辉混凝土构件有限公司 | A kind of bridge stress plane plate node bracing means |
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