CN113832873A - Reconstruction construction method for existing bridge of expressway - Google Patents
Reconstruction construction method for existing bridge of expressway Download PDFInfo
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- CN113832873A CN113832873A CN202111233895.XA CN202111233895A CN113832873A CN 113832873 A CN113832873 A CN 113832873A CN 202111233895 A CN202111233895 A CN 202111233895A CN 113832873 A CN113832873 A CN 113832873A
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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 application relates to a reconstruction construction method for an existing bridge of a highway, which comprises the following steps: and (3) construction of a supporting foundation: pouring foundation supports at the bridge abutment and the bridge pier; force bearing and top bracing: installing a shoring object on the foundation support object so as to shove the beam body; cutting off and jacking: cutting off the bridge pier by using a wire saw, and then jacking the beam body in place step by step; and (4) top bracing pouring: after the bridge body is jacked in place, heightening supports are poured on the bridge abutment and the bridge pier and support the bridge body, so that the bridge is lifted and heightened, a new bridge is built, and the new bridge and an old bridge are spliced into a whole. The method has the effect of reducing resource waste in the old bridge reconstruction process.
Description
Technical Field
The application relates to the field of bridge reconstruction engineering, in particular to a construction method for reconstructing an existing bridge of a highway.
Background
The bridge reconstruction engineering refers to the engineering of reinforcing, repairing, reinforcing, widening and the like of the bridge to meet the requirements of the bearing capacity and the traffic flow increase of the bridge and meet the requirements of the under-bridge clearance and the bridge clearance.
In China, a large number of highway bridges or urban overpasses in operation cause insufficient clearance under bridges due to bridge settlement, improvement of navigation grade, improvement of underpass road grade or route transformation and the like. The service function of the bridge in normal service life can not meet the requirements of transportation, and the hidden danger is formed for the operation safety of the bridge and the underpass line.
Referring to fig. 1, the river-crossing bridge includes a girder 11 crossing a river, abutments 12 constructed on both banks of the river, and the girder 11 placed on the abutments 12. Pier 13 has vertically been pour in the river course, and pier 13 sets up to a plurality of groups, and a plurality of pier 13 of group set up along 11 length direction intervals of roof beam body, and every pier 13 of group quantity is two. The lower surface of the beam body 11 is fixedly connected with a bent cap 14, and the length direction of the bent cap 14 is horizontally arranged and is vertical to the length direction of the beam body 11. The lower surface of the bent cap 14 is fixedly connected with the upper end surface of the pier 13. Inclined planes are arranged at two ends of the length direction of the lower surface of the cover beam 14.
With respect to the related art in the above, the inventors consider that: in order to enable the bridge to meet the transportation requirements, a new bridge is rebuilt after the old bridge is removed, and the old bridge is abandoned in such a way, so that the resource is greatly wasted.
Disclosure of Invention
In order to reduce resource waste in the old bridge reconstruction process, the application provides a reconstruction construction method for the existing bridge of the expressway.
The application provides a reconstruction construction method for an existing bridge of a highway, which adopts the following technical scheme:
a reconstruction construction method for an existing bridge of a highway comprises the following steps:
and (3) construction of a supporting foundation: pouring foundation supports at the bridge abutment and the bridge pier;
force bearing and top bracing: installing a shoring object on the foundation support object so as to shove the beam body;
cutting off and jacking: cutting off the bridge pier by using a wire saw, and then jacking the beam body in place step by step;
and (4) top bracing pouring: after the bridge body is jacked in place, heightening supports are poured on the bridge abutment and the bridge pier and support the bridge body, so that the bridge is lifted and heightened, a new bridge is built, and the new bridge and an old bridge are spliced into a whole.
Through adopting above-mentioned technical scheme, carry out the shore to the roof beam body earlier, saw the pier and cut off the back jacking step by step and target in place, consolidate the support back to the roof beam body, new bridge and old bridge concatenation to effectively reduce the wasting of resources that old bridge demolishd and cause, practice thrift and build the bridge cost.
Optionally, the existing bridge of highway is reformed transform construction method and is used existing bridge lifting of highway and increases the system, existing bridge lifting of highway increases the system including pouring the supporting mechanism on abutment and pier, the supporting mechanism is basic supporter, be provided with the climbing mechanism that is used for jacking the roof beam body on the supporting mechanism, pour the reinforcement mechanism on the supporting mechanism as increasing the supporter, when the climbing mechanism shores the roof beam body, the pier is cut into pier stud and pier stud down.
Through adopting above-mentioned technical scheme, pour earlier supporting mechanism as basic support under the condition of not having the atress basis under the bridge, install climbing mechanism and shove the roof beam body again, the climbing mechanism can be in place the roof beam body jacking after sawing off the pier, and reinforcing mechanism supports the roof beam body as increasing the support at last to accomplish the jacking of bridge and increase, easy operation is convenient.
Optionally, the supporting mechanism includes a first basic supporting platform fixedly connected to one side of the abutment facing the other abutment, a second basic supporting platform is fixedly connected to the pier, the first basic supporting platform and the second basic supporting platform are both connected to the bottom wall of the river channel, and the upper surfaces of the first basic supporting platform and the second basic supporting platform are located on the same horizontal plane; steel structure supporting beams are bound to the lower surface of the beam body and are positioned above the first basic supporting platforms, each steel structure supporting beam corresponds to one first basic supporting platform and is arranged correspondingly to the first basic supporting platform, and the lower surfaces of the steel structure supporting beams and the lower surfaces of the cover beams are positioned on the same horizontal plane; climbing mechanism is including setting up in the first jacking subassembly of first basic brace table upper surface, first jacking subassembly is used for jacking steel construction supporting beam, second basic brace table upper surface is provided with second jacking subassembly, first jacking subassembly is used for jacking bent cap.
Through adopting above-mentioned technical scheme, first basic supporting bench and second basic supporting bench make first jacking subassembly and second jacking subassembly bottom be in same horizontal plane, and steel construction supporting beam and bent cap make first jacking subassembly and second jacking subassembly upper end be in same horizontal plane, and control first jacking subassembly and second jacking subassembly jacking speed is the same to make first jacking subassembly and second jacking subassembly can more steadily jacking roof beam body lifting.
Optionally, the first jacking assembly comprises two first supporting tubes vertically and fixedly connected to the upper surface of the first basic supporting platform, the two first supporting tubes are arranged at intervals along the width direction of the beam body, the upper end surface of the first supporting pipe is coaxially provided with a first jacking jack for jacking the steel structure supporting beam, the upper surface of the first basic supporting platform is vertically and fixedly connected with two third supporting tubes, the upper end surface of each third supporting tube is coaxially provided with a first following jack for jacking the steel structure supporting beam, the first jacking jack and the first following jack are both inverted hydraulic jacks with ball heads, the first jacking jack and the first following jack are both connected with the steel structure supporting beam through connecting pieces, the bulb of first jacking jack and first stay tube up end butt, the bulb of first following jack and third stay tube up end butt.
By adopting the technical scheme, during jacking, the first jacking jack jacks, and the first following jack follows the cylinder out for protection, so that a first stroke is completed; the first following jack supports the steel structure supporting beam to ensure that the beam body does not fall, the first jacking jack is retracted to a non-extension state, the first jacking jack ball head is spaced from the upper end face of the first supporting pipe after the cylinder is retracted, then a corresponding steel cushion block is added between the first jacking jack ball head and the upper end face of the first supporting pipe, the first jacking jack supports the steel structure supporting beam to ensure that the beam body does not fall, the first following jack is retracted to a non-extension state, then a corresponding steel cushion block is added on the first following jack ball head and the upper end face of the third supporting pipe, the operation is repeated, and the beam body can be jacked in place step by step.
Optionally, the ball head of the first jacking jack and the ball head of the first following jack can rotate, and the rotation angle is less than or equal to 5 °.
Through adopting above-mentioned technical scheme, in the jacking process, when the roof beam body receives wind-force interference unable stable control bridge floor or adjustment bridge floor slope, the roof beam body takes place to rotate, first jacking jack becomes out of plumb with the roof beam body by perpendicular, consequently first jacking jack's bulb is along with the change automatic adjustment of roof beam body slope, the bulb makes first jacking jack's cylinder body and roof beam body keep perpendicular, reduce the jacking in-process because the first jacking jack cylinder body that the slope change arouses and the roof beam body out of plumb to the local stress that the roof beam body produced, the jacking stability is improved, first following jack is the same reason.
Optionally, the connecting piece on the first jacking jack includes fixed plate fixedly connected in first jacking jack cylinder bottom, steel construction supporting beam lower surface fixed level fixedly connected with positioning plate, fixed plate sliding connection is in positioning plate lower surface, the leveling board has been placed between fixed plate and the positioning plate, leveling board and fixed plate three support tightly through the bolt, when this three supports tightly through the bolt, first jacking jack and the coaxial setting of first supporting tube.
Through adopting above-mentioned technical scheme, when the roof beam body receives wind-force interference unable stable control bridge floor or adjustment bridge floor slope, the roof beam body takes place to rotate, the bulb rotates and makes first jacking jack cylinder body perpendicular with the roof beam body, first jacking jack axis is skew with first supporting tube axis this moment, through adjusting the fixed plate and increase the leveling board between fixed plate and positioning plate, thereby become coaxial state again with first jacking jack and first supporting tube, and then be convenient for follow vertical direction jacking with the roof beam body, improve roof beam body jacking stability.
Optionally, the existing bridge lifting and heightening system for the expressway further comprises a limiting mechanism, the limiting mechanism comprises a longitudinal limiting assembly and a transverse limiting assembly, a set of longitudinal limiting assemblies are arranged at two ends of the beam body, and the transverse limiting assembly is arranged on the upper surface of the first basic supporting table.
Through adopting above-mentioned technical scheme, the setting of vertical spacing subassembly and horizontal spacing subassembly conveniently observes roof beam body position to in time adjust the roof beam body, reduce the risk of roof beam body jacking in-process.
Optionally, the horizontal spacing subassembly includes two backup pads of fixed connection in first basic supporting bench upper surface, the vertical gag lever post that is provided with of backup pad upper surface, a steel structure supporting beam is located between two gag lever posts on same first basic supporting bench, a steel structure supporting beam length direction is parallel with roof beam body width direction, a steel structure supporting beam both ends and adjacent gag lever post interval set up.
Through adopting above-mentioned technical scheme, measure the interval between steel construction supporting beam and the gag lever post, can learn roof beam body lateral displacement volume to in time adjust roof beam body position.
Optionally, be provided with the observation subassembly on the gag lever post, the observation subassembly includes the slide bar of horizontal sliding connection on the gag lever post, the slide bar is towards a steel construction supporting beam one end fixedly connected with butt plate, butt plate and a steel construction supporting beam butt, the slide bar is kept away from butt plate one end and is passed gag lever post fixedly connected with limiting plate, limiting plate and gag lever post butt.
Through adopting above-mentioned technical scheme, roof beam body lateral displacement promotes the butt board and slides, and the butt board promotes the limiting plate through the slide bar and slides, observes limiting plate and gag lever post interval, can learn the roof beam body and take place lateral displacement to adjust the roof beam body.
In summary, the present application includes at least one of the following beneficial technical effects:
under the condition of no stressed foundation under a bridge, firstly, a supporting mechanism is poured as a foundation support, then a jacking mechanism is installed to jack a beam body, the beam body can be jacked in place by the jacking mechanism after a pier is sawed off, and finally, a reinforcing mechanism is used as a heightening support to support the beam body, so that the bridge is jacked and heightened, and the operation is simple and convenient;
in the jacking process, the steel cushion blocks are conveniently installed through the alternate jacking of the first jacking jack and the first following jack, so that the step-by-step jacking of the beam body is realized;
when the beam body rotates, the ball head enables the first jacking jack and the first following jack to rotate, the damage of stress to the beam body is reduced, and then the beam body is vertically lifted by adjusting the first jacking jack and the first following jack.
Drawings
FIG. 1 is a drawing of the related art of the present application;
fig. 2 is a schematic view of the overall structure of embodiment 2 of the present application, which is mainly used for showing the state before jacking;
fig. 3 is a schematic view of the overall structure of embodiment 2 of the present application, which is mainly used for showing a state after jacking reinforcement is completed;
FIG. 4 is a partial structural sectional view of the embodiment 2 of the present application, which is mainly used for showing a transverse limiting component;
FIG. 5 is a partial schematic structural view of embodiment 2 of the present application, which is mainly used for illustrating a second jacking assembly;
FIG. 6 is a partial structural sectional view of embodiment 2 of the present application, which is mainly used for showing the state of the connecting member when the beam body is not inclined;
FIG. 7 is a partial structure of the embodiment 2 of the present application, which is mainly used for showing the state of the connecting member after the beam body is inclined and leveled;
fig. 8 is a partially enlarged schematic view of a portion a in fig. 4.
Description of reference numerals: 11. a beam body; 12. an abutment; 13. a bridge pier; 14. a capping beam; 2. a support mechanism; 21. a first support assembly; 211. a first base support table; 212. a steel structural support beam; 22. a second support assembly; 221. leveling the support platform; 222. a second base support table; 3. a jacking mechanism; 31. a first jacking assembly; 311. a first support tube; 312. a first jack; 313. a third support tube; 314. a first follower jack; 32. a second jacking assembly; 321. a second support tube; 322. a second jack; 323. a fourth support tube; 324. a second follower jack; 33. a connecting member; 331. a positioning plate; 3311. a chute; 332. a fixing plate; 333. leveling; 334. a shielding box; 335. a connecting ring; 4. a limiting mechanism; 41. a longitudinal position limiting component; 411. a support bar; 412. a reinforcing rod; 42. a transverse limiting component; 421. a support plate; 422. a limiting rod; 4221. a through hole; 43. an observation component; 431. a slide bar; 432. a first limit ring; 433. a second stop collar; 434. a return spring; 435. a limiting plate; 436. a butt joint plate; 5. a reinforcement mechanism; 51. a column beam is embraced; 52. a first support table; 53. a second support table.
Detailed Description
The present application is described in further detail below with reference to figures 2-8.
Example 1:
the embodiment 1 of the application discloses a reconstruction construction method for an existing bridge of a highway. Referring to fig. 1, a reconstruction construction method for an existing bridge of a highway includes the following steps:
s1, construction of a supporting foundation: pouring a supporting mechanism 2 as a foundation support at the bridge abutment 12 and the bridge pier 13, wherein the supporting mechanism 2 is positioned below the beam body 11;
s2, stress top bracing: a jacking mechanism 3 is arranged on the supporting mechanism 2 to be used as a jacking object, and the jacking mechanism 3 is abutted against the lower surface of the beam body 11 and the lower surface of the cover beam 14 so as to support the beam body 11;
s3, cutting off and jacking: cutting off the bridge pier 13 by using a rope saw, dividing the bridge pier 13 into an upper section and a lower section in the vertical direction, jacking the beam body 11 by using the jacking mechanism 3, jacking by adopting a step-by-step jacking in place mode, jacking by 0.2m each time, and measuring the elevation and the coordinate of the beam body 11 after jacking is completed each time;
s4, pouring a top support: after the beam body 11 is jacked in place, the concrete pouring reinforcing mechanism 5 is used as a heightening support on the bridge abutment 12 and the bridge piers 13, the reinforcing mechanism 5 connects the beam body 11 with the bridge abutment 12, and meanwhile, two sections of bridge piers 13 cut off in the vertical direction are connected, so that the bridge can be lifted and heightened, a new bridge is built, and the new bridge and an old bridge are spliced into a whole.
The implementation principle of the reconstruction construction method for the existing bridge of the expressway in the embodiment 1 of the application is as follows: the supporting mechanism 2 is poured at the bridge pier 13 and the bridge abutment 12 as a foundation support, and then the jacking mechanism 3 is installed on the supporting mechanism 2. After the bridge pier 13 is cut off by using the rope saw, the jacking mechanism 3 jacks the beam body 11 in place step by step, and the beam body 11 is supported by the reinforcing mechanism 5, so that the beam body 11 is lifted and heightened.
Example 2:
the embodiment 2 of the application discloses an existing bridge lifting and heightening system for an expressway, which is used for reconstruction and construction of the existing bridge of the expressway in the embodiment 1.
Referring to fig. 2 and 3, the existing bridge lifting and heightening system for the expressway comprises a supporting mechanism 2 formed by pouring concrete, wherein the supporting mechanism 2 is located below a beam body 11, a jacking mechanism 3 for jacking the beam body 11 is arranged on the supporting mechanism 2, limiting mechanisms 4 are arranged at two ends of the beam body 11, and a reinforcing mechanism 5 is arranged on the supporting mechanism 2.
The supporting mechanism 2 plays a role in supporting the foundation, after the bridge pier 13 is cut off by the rope saw, the jacking mechanism 3 jacks the beam body 11 in place, the limiting mechanism 4 limits the beam body 11 in the process, the position of the beam body 11 is convenient to adjust, the reinforcing mechanism 5 supports the beam body 11, so that the beam body 11 stays at the current position, and the new bridge is built and connected with the jacking rear beam body 11 to finish the lifting heightening of the existing bridge.
Referring to fig. 2 and 4, the supporting mechanism 2 includes a first supporting component 21 fixedly connected to the abutment 12, a second supporting component 22 fixedly connected to the bottom wall of the river channel, a set of second supporting components 22 is correspondingly disposed on each set of piers 13, and the second supporting components 22 are fixedly connected to the piers 13.
Referring to fig. 2 and 4, the first supporting assembly 21 includes a first basic supporting platform 211 fixedly connected to one side of the bridge 12 facing the other bridge 12, the first basic supporting platform 211 is rectangular, the length direction of the first basic supporting platform 211 is horizontally arranged and perpendicular to the length direction of the beam body 11, and the first basic supporting platform 211 is fixedly connected to the bottom wall of the river channel. The lower surface of the beam body 11 is bound by a steel structure supporting beam 212 through a steel wire rope, the steel structure supporting beam 212 is located above the first basic supporting platforms 211, each first basic supporting platform 211 is provided with one steel structure supporting beam 212 corresponding to the first basic supporting platform 211, the length direction of the steel structure supporting beam 212 is parallel to the length direction of the first basic supporting platform 211, and the lower surface of the steel structure supporting beam 212 and the lower surface of the cover beam 14 are located on the same horizontal plane.
Referring to fig. 2 and 5, the second support assembly 22 includes a leveling support platform 221 fixedly connected to the inclined plane of the cap beam 14, the leveling support platform 221 is formed by pouring high-strength grouting material, and the lower surface of the leveling support platform 221 and the lower surface of the cap beam 14 are located on the same horizontal plane. River course bottom fixedly connected with second basis brace table 222, second basis brace table 222 shape are cuboid and length direction and are parallel with first basis brace table 211 length direction, and second basis brace table 222 upper surface and first basis brace table 211 upper surface are in same horizontal plane. The second base support platform 222 is fixedly connected with the bridge pier 13, the second base support platform 222 is located below the cover beams 14 in the vertical direction, and each cover beam 14 is provided with one second base support platform 222 corresponding to the cover beam.
The lower surface of the steel structure support beam 212, the lower surface of the leveling support platform 221 and the lower surface of the cover beam 14 are flush, and when the upper surface of the first basic support platform 211 and the upper surface of the second basic support platform 222 are flush, the jacking mechanism 3 can smoothly and stably jack up each part of the beam body 11 to a designated height.
Referring to fig. 2 and 5, the bridge pier 13 is cut into an upper pier stud and a lower pier stud by a rope saw, the jacking mechanism 3 includes two sets of first jacking assemblies 31 located on the first base support table 211, and the two sets of first jacking assemblies 31 are arranged at intervals along the length direction of the beam body 11. The second base support platform 222 is provided with two sets of second jacking assemblies 32, the two sets of second jacking assemblies 32 are arranged at intervals along the length direction of the beam body 11, and the pier 13 is located between the two sets of second jacking assemblies 32.
Referring to fig. 2 and 4, the first jacking assembly 31 includes two first supporting pipes 311 vertically and fixedly connected to the upper surface of the first base supporting platform 211, and the two first supporting pipes 311 are arranged at intervals along the length direction of the steel structure supporting beam 212. The upper end face of the first supporting pipe 311 is coaxially provided with a first jacking jack 312, one end of the first jacking jack 312 with a ball head is abutted against the upper end face of the first supporting pipe 311, and a cylinder body of the first jacking jack 312 is mounted on the lower surface of the steel structure supporting beam 212 through a connecting piece 33.
Referring to fig. 2 and 4, two third support pipes 313 are vertically and fixedly connected to the upper surface of the first base support table 211, the two third support pipes 313 are arranged at intervals along the length direction of the steel structure support beam 212, and the two first support pipes 311 are located between the two third support pipes 313. The upper end of the third supporting pipe 313 is coaxially and vertically fixedly connected with a first following jack 314, one end, with a ball head, of the first following jack 314 abuts against the upper end face of the third supporting pipe 313, and the first following jack 314 is mounted on the lower surface of the steel structure supporting beam 212 through a connecting piece 33.
In the jacking process, the first jacking jack 312 jacks, and the first following jack 314 follows the cylinder discharging protection to complete the first stroke. The first following jack 314 props the steel structure supporting beam 212 to ensure that the beam body 11 does not fall, the first jacking jack 312 retracts to be in a non-extension state, after the retraction of the cylinder is completed, the ball head of the first jacking jack 312 is spaced from the upper end face of the first supporting tube 311, the spacing height is larger than or equal to the jacking height of the stage, and then a corresponding steel cushion block is added between the ball head of the first jacking jack 312 and the upper end face of the first supporting tube 311. The first jacking jack 312 props up the steel structure support beam 212 to ensure that the beam body 11 does not fall, the first following jack 314 retracts to be in a non-extension state, and then corresponding steel cushion blocks are added on the ball head of the first following jack 314 and the upper end face of the third support pipe 313. And repeating the operations to realize step-by-step jacking.
Referring to fig. 2 and 5, the second jacking assembly 32 includes two second support pipes 321 vertically and fixedly connected to the upper surface of the second base support platform 222, the two second support pipes 321 are spaced along the length direction of the second base support platform 222, and the second support pipes 321 are located between the two piers 13. The upper end face of the second supporting pipe 321 is coaxially and vertically fixedly connected with a second jacking jack 322, one end, with a ball head, of the second jacking jack 322 is abutted to the upper end face of the second supporting pipe 321, and a cylinder body of the second jacking jack 322 is mounted on the lower surface of the cover beam 14 through a connecting piece 33.
Referring to fig. 2 and 5, two fourth supporting pipes 323 are vertically and fixedly connected to the upper surface of the second base supporting platform 222, the two fourth supporting pipes 323 are arranged at intervals along the length direction of the second base supporting platform 222, the bridge pier 13 is located between the two fourth supporting pipes 323, a second following jack 324 is coaxially and vertically and fixedly connected to the upper end surface of the fourth supporting pipe 323, one end, with a ball head, of the second following jack 324 abuts against the upper end surface of the fourth supporting pipe 323, and a cylinder of the second following jack 324 is mounted on the lower surface of the leveling supporting platform 221 through a connecting piece 33.
In the jacking process, the second jacking jack 322 jacks, and the second following jack 324 follows the cylinder discharging protection to complete the first stroke. The second following jack 324 props the steel structure supporting beam 212 to ensure that the beam body 11 does not fall, the second jacking jack 322 retracts to a non-extension state, after the cylinder retraction is finished, the ball head of the second jacking jack 322 is spaced from the upper end face of the second supporting pipe 321, the spacing height is larger than or equal to the jacking height of the stage, and then a corresponding steel cushion block is added between the ball head of the second jacking jack 322 and the upper end face of the second supporting pipe 321. The second jacking jack 322 jacks the steel structure support beam 212 to ensure that the beam body 11 does not fall down, the second following jack 324 retracts to a non-extension state, and then corresponding steel cushion blocks are added on the ball head of the second following jack 324 and the upper end face of the fourth support pipe 323. And repeating the operations to realize step-by-step jacking.
Referring to fig. 4 and 5, the first jacking jack 312, the second jacking jack 322, the first following jack 314, and the second following jack 324 are all hydraulic jacks with rotatable ball heads, and the rotation angles of the ball heads of the four hydraulic jacks are 5 °.
In the jacking process, when the bridge deck 11 is disturbed by wind power and cannot be stably controlled or the gradient of the bridge deck is adjusted, the beam 11 rotates, and the hydraulic jack and the beam 11 are not perpendicular from the perpendicular direction. Because the first jacking jack 312, the second jacking jack 322, the first following jack 314 and the second following jack 324 are all provided with rotatable ball heads, the ball heads of the hydraulic jacks automatically adjust along with the change of the gradient of the beam body 11, the ball heads of the hydraulic jacks enable the cylinder body of the hydraulic jacks to be vertical to the beam body 11, the local stress generated on the beam body 11 by the fact that the cylinder body of the hydraulic jacks and the beam body 11 are not vertical due to the gradient change in the jacking process is reduced, and the jacking stability is improved.
Referring to fig. 2 and 6, taking the first jacking jack 312 as an example, the connecting member 33 includes a positioning plate 331 disposed parallel to the beam body 11, the positioning plate 331 is fixedly connected to the lower surface of the steel structure supporting beam 212 by a connecting ring 335, and the positioning plate 331 connected to the capping beam 14 and the leveling support platform 221 may be concrete poured. Four sliding grooves 3311 are formed in the positioning plate 331 along the length of the beam 11, and the four sliding grooves 3311 are circumferentially formed in the positioning plate 331. The bottom of the cylinder body of the first jacking jack 312 is fixedly connected with a fixing plate 332, the positioning plate 331 is connected with the fixing plate 332 through bolts, and each sliding groove 3311 is correspondingly provided with one bolt. The screw of the bolt vertically passes through the sliding slot 3311 and the fixing plate 332, the head of the bolt abuts against the upper surface of the positioning plate 331, and the nut of the bolt abuts against the lower surface of the fixing plate 332. The upper surface of the positioning plate 331 is fixedly connected with a shielding box 334 corresponding to the sliding slot 3311, a cavity for sliding the head of the bolt is arranged in the shielding box 334, and the opening of the cavity faces the positioning plate 331.
Referring to fig. 7, a wedge-shaped leveling plate 333 is disposed between the positioning plate 331 and the fixing plate 332, and the positioning plate 331, the leveling plate 333 and the fixing plate 332 are tightly pressed.
When the beam body 11 is disturbed by wind power and the bridge deck cannot be stably controlled or the gradient of the bridge deck is adjusted, the beam body 11 rotates, and the hydraulic jack cylinder body is perpendicular to the beam body 11 through rotation of the ball head. In order to vertically lift the beam body 11, the bolt of the connecting member 33 corresponding to the first lifting jack 312 is loosened, the fixing plate 332 is slid to make the first lifting jack 312 coaxial with the first supporting tube 311, the leveling plate 333 is placed between the positioning plate 331 and the fixing plate 332 and the bolt is tightened, and the positioning plate 331, the leveling plate 333 and the fixing plate 332 are abutted, so that the beam body 11 can be lifted in the vertical direction.
Referring to fig. 2, the limiting mechanism 4 includes a longitudinal limiting component 41, and a set of longitudinal limiting components 41 is disposed at both ends of the beam body 11. Two sets of horizontal spacing subassemblies 42 are provided with on first basic supporting bench 211, and steel construction supporting beam 212 is located between two sets of horizontal spacing subassemblies 42. The transverse limiting assembly 42 is provided with an observation assembly 43, and the steel structure supporting beam 212 is abutted to the observation assembly 43.
Referring to fig. 2, the longitudinal position limiting assembly 41 includes three obliquely arranged support rods 411, the lower ends of the support rods 411 are fixedly connected to the ground, the upper ends of the three support rods 411 are fixedly connected, a line vertically passing through the intersection point of the three support rods 411 is a central line, and the projections of the three support rods 411 on the same horizontal plane are circumferentially arranged by taking the projection of the central line on the horizontal plane as a circle center. A plurality of reinforcing rods 412 are fixedly connected between two adjacent supporting rods 411.
With two spinal branch vaulting poles 411 of vertical spacing subassembly 41 towards the roof beam body 11, when the roof beam body 11 when to both ends inclined movement, vertical spacing subassembly 41 is effective to carry on spacingly to the roof beam body 11, prevents that the roof beam body 11 from sliding and damaging.
Referring to fig. 4 and 8, the lateral limiting member 42 includes two supporting plates 421 horizontally and fixedly connected to the upper surface of the first base supporting platform 211, and the two supporting plates 421 are spaced apart from each other along the length direction of the first base supporting platform 211. The upper surface of the supporting plate 421 is detachably connected with a limiting rod 422 through a bolt, the limiting rod 422 is vertically arranged, and the steel structure supporting beam 212 is located between the two limiting rods 422 and is arranged at an interval with the limiting rods 422.
Referring to fig. 4 and 8, the observation assembly 43 includes two sliding rods 431 horizontally slidably connected to the limiting rod 422 along the length direction of the steel structure support beam 212, the two sliding rods 431 are arranged at intervals in the vertical direction, a through hole 4221 is formed in the limiting rod 422 along the length direction of the steel structure support beam 212, the sliding rod 431 passes through the through hole 4221, and each sliding rod 431 is provided with one through hole 4221 corresponding to the through hole 4221. The inner wall of the through hole 4221 is fixedly connected with a first limiting ring 432, the side wall of the sliding rod 431 is fixedly connected with a second limiting ring 433, the second limiting ring 433 is positioned on one side of the first limiting ring 432 facing the steel structure supporting beam 212, the sliding rod 431 is sleeved with a reset spring 434, and the reset spring 434 is positioned between the first limiting ring 432 and the second limiting ring 433. One end of the sliding rod 431, which is far away from the steel structure support beam 212, is fixedly connected with a limiting plate 435, and the limiting plate 435 is abutted against the limiting rod 422. An abutting plate 436 is vertically and fixedly connected to one end of the sliding rod 431 facing the steel structural support beam 212, and the abutting plate 436 abuts against the steel structural support beam 212.
When the beam body 11 moves in the horizontal direction, the steel structure support beam 212 pushes the abutting plate 436 to slide, and the abutting plate 436 pushes the limiting rod 422 to slide, so that the sliding distance of the beam body 11 can be observed conveniently, and the position of the beam body 11 can be adjusted conveniently and timely.
Referring to fig. 3, the reinforcing mechanism 5 includes an embracing column beam 51 vertically and fixedly connected to the upper surface of the second foundation support platform 222, the embracing column beam 51 is formed by pouring concrete, the embracing column beam 51 is cylindrical, the embracing column beam 51 and the lower pier are coaxially arranged, the lower end of the embracing column beam 51 covers the lower pier, the upper end of the embracing column beam 51 covers the upper pier, and the diameter of the embracing column beam 51 is larger than that of the pier 13. The upper surface of the abutment 12 is fixedly connected with a first supporting platform 52, and the first supporting platform 52 is abutted against the lower surface of the beam body 11. The upper surface of the bridge abutment 12 is fixedly connected with a second support platform 53, and the second support platform 53 is abutted against one end of the beam body 11.
The upper pier column and the lower pier column are connected through the column holding beam 51, the two ends of the beam body 11 are supported through the first supporting platform 52, and the two ends of the beam body 11 are limited through the second supporting platform 53, so that the bridge is lifted.
The implementation principle of the existing bridge lifting and heightening system of the expressway in the embodiment 2 of the application is as follows: the first foundation support platform 211, the second foundation support platform 222 and the leveling support platform 221 are poured at corresponding positions. Then, a first support pipe 311 and a third support pipe 313 are installed on the first base support table 211, and a first jacking jack 312 and a first following jack 314 are installed on the steel structural support beam 212. A second support pipe 321 and a fourth support pipe 323 are mounted on the second base support platform 222, a second jacking jack 322 is mounted on the capping beam 14, and a second following jack 324 is mounted on the leveling support platform 221. Finally, the longitudinal limiting assembly 41 and the transverse limiting assembly 42 are installed. The pier 13 is sawed off using a wire saw.
In the jacking process, the first jacking jack 312 jacks, and the first following jack 314 follows the cylinder discharging protection to complete the first stroke. The first following jack 314 props the steel structure supporting beam 212 to ensure that the beam body 11 does not fall, the first jacking jack 312 retracts to be in a non-extension state, after the retraction of the cylinder is completed, the ball head of the first jacking jack 312 is spaced from the upper end face of the first supporting tube 311, the spacing height is larger than or equal to the jacking height of the stage, and then a corresponding steel cushion block is added between the ball head of the first jacking jack 312 and the upper end face of the first supporting tube 311. The first jacking jack 312 props up the steel structure support beam 212 to ensure that the beam body 11 does not fall, the first following jack 314 retracts to be in a non-extension state, and then corresponding steel cushion blocks are added on the ball head of the first following jack 314 and the upper end face of the third support pipe 313.
And the second jacking jack 322 jacks, and the second following jack 324 follows the cylinder discharging protection to complete the first stroke. The second following jack 324 props the steel structure supporting beam 212 to ensure that the beam body 11 does not fall, the second jacking jack 322 retracts to a non-extension state, after the cylinder retraction is finished, the ball head of the second jacking jack 322 is spaced from the upper end face of the second supporting pipe 321, the spacing height is larger than or equal to the jacking height of the stage, and then a corresponding steel cushion block is added between the ball head of the second jacking jack 322 and the upper end face of the second supporting pipe 321. The second jacking jack 322 jacks the steel structure support beam 212 to ensure that the beam body 11 does not fall down, the second following jack 324 retracts to a non-extension state, and then corresponding steel cushion blocks are added on the ball head of the second following jack 324 and the upper end face of the fourth support pipe 323.
And repeating the jacking operation to realize step-by-step jacking.
When the beam body 11 is disturbed by wind power and the bridge deck cannot be stably controlled or the gradient of the bridge deck is adjusted, the beam body 11 rotates, and the hydraulic jack cylinder body is perpendicular to the beam body 11 through rotation of the ball head. In order to vertically lift the beam body 11, the bolt of the connecting member 33 corresponding to the first lifting jack 312 is loosened, the fixing plate 332 is slid to make the first lifting jack 312 coaxial with the first supporting tube 311, the leveling plate 333 is placed between the positioning plate 331 and the fixing plate 332 and the bolt is tightened, and the positioning plate 331, the leveling plate 333 and the fixing plate 332 are abutted, so that the beam body 11 can be lifted in the vertical direction. The second jack-up jack 322, the first follower jack 314 and the second follower jack 324 all operate in the same manner.
And after jacking in place, pouring the column-embracing beam 51, the first supporting table 52 and the second supporting table 53, and dismantling the jacking mechanism 3 and the limiting mechanism 4 to complete the lifting and heightening of the bridge.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A reconstruction construction method for an existing bridge of a highway is characterized by comprising the following steps:
and (3) construction of a supporting foundation: pouring foundation supports at the bridge abutment and the bridge pier;
force bearing and top bracing: installing a shoring object on the foundation support object so as to shove the beam body;
cutting off and jacking: cutting off the bridge pier by using a wire saw, and then jacking the beam body in place step by step;
and (4) top bracing pouring: after the bridge body is jacked in place, heightening supports are poured on the bridge abutment and the bridge pier and support the bridge body, so that the bridge is lifted and heightened, a new bridge is built, and the new bridge and an old bridge are spliced into a whole.
2. The reconstruction construction method for the existing expressway bridge according to claim 1, wherein the reconstruction construction method comprises the following steps: the existing bridge of highway is reformed transform construction method and is used the existing bridge lifting of highway to increase the system, the existing bridge lifting of highway increases the system including pouring supporting mechanism (2) on abutment (12) and pier (13), supporting mechanism (2) are basic supporter, be provided with climbing mechanism (3) that are used for jacking the roof beam body (11) on supporting mechanism (2), it increases the supporter to pour stiffening mechanism (5) on supporting mechanism (2), when climbing mechanism (3) props roof beam body (11), pier (13) are cut into pier stud and pier stud down.
3. The reconstruction construction method for the existing expressway bridge according to claim 2, wherein the reconstruction construction method comprises the following steps: the supporting mechanism (2) comprises a first basic supporting platform (211) fixedly connected to one side, facing the other bridge abutment (12), of the bridge abutment (12), a second basic supporting platform (222) is fixedly connected to the bridge pier (13), the first basic supporting platform (211) and the second basic supporting platform (222) are both connected with the bottom wall of the river channel, and the upper surfaces of the first basic supporting platform (211) and the second basic supporting platform (222) are located on the same horizontal plane;
the lower surface of the beam body (11) is bound with steel structure supporting beams (212), the steel structure supporting beams (212) are located above the first basic supporting platforms (211), each steel structure supporting beam (212) corresponds to one first basic supporting platform (211) and is arranged correspondingly to the first basic supporting platform, and the lower surfaces of the steel structure supporting beams (212) and the lower surfaces of the cover beams (14) are located on the same horizontal plane;
climbing mechanism (3) are including setting up in first jacking subassembly (31) of first basic supporting bench (211) upper surface, first jacking subassembly (31) are used for jacking steel construction supporting beam (212), second basic supporting bench (222) upper surface is provided with second jacking subassembly (32), first jacking subassembly (31) are used for jacking bent cap (14).
4. The reconstruction construction method for the existing expressway bridge according to claim 3, wherein the reconstruction construction method comprises the following steps: the first jacking assembly (31) comprises two first supporting pipes (311) which are vertically and fixedly connected to the upper surface of the first basic supporting platform (211), the two first supporting pipes (311) are arranged at intervals along the width direction of the beam body (11), a first jacking jack (312) for jacking the steel structure supporting beam (212) is coaxially arranged on the upper end surface of the first supporting pipe (311), two third supporting pipes (313) are vertically and fixedly connected to the upper surface of the first basic supporting platform (211), a first following jack (314) for jacking the steel structure supporting beam (212) is coaxially arranged on the upper end surface of the third supporting pipe (313), the first jacking jack (312) and the first following jack (314) are inverted hydraulic jacks with ball heads, and the first jacking jack (312) and the first following jack (314) are both connected with the steel structure supporting beam (212) through a connecting piece (33), the ball head of the first jacking jack (312) is abutted against the upper end face of the first supporting pipe (311), and the ball head of the first following jack (314) is abutted against the upper end face of the third supporting pipe (313).
5. The reconstruction construction method for the existing expressway bridge according to claim 4, wherein the reconstruction construction method comprises the following steps: the ball head of the first jacking jack (312) and the ball head of the first following jack (314) can rotate, and the rotation angle is less than or equal to 5 degrees.
6. The reconstruction construction method for the existing expressway bridge according to claim 5, wherein the reconstruction construction method comprises the following steps: connecting piece (33) on first jacking jack (312) include fixed plate (332) of fixed connection in first jacking jack (312) cylinder body bottom, steel construction supporting beam (212) lower surface fixed level fixedly connected with positioning plate (331), fixed plate (332) sliding connection is in positioning plate (331) lower surface, positioning plate (333) have been placed between fixed plate (332) and positioning plate (331), positioning plate (333) and fixed plate (332) three support tightly through the bolt, when this three supports tightly through the bolt, first jacking jack (312) and first supporting tube (311) coaxial setting.
7. The reconstruction construction method for the existing expressway bridge according to claim 4, wherein the reconstruction construction method comprises the following steps: the existing bridge lifting and heightening system for the expressway further comprises a limiting mechanism (4), wherein the limiting mechanism (4) comprises a longitudinal limiting assembly (41) and a transverse limiting assembly (42), a set of longitudinal limiting assemblies (41) are arranged at two ends of a beam body (11) and at two ends of a beam body (11), and the transverse limiting assembly (42) is arranged on the upper surface of a first basic supporting table (211).
8. The reconstruction construction method for the existing expressway bridge according to claim 7, wherein the reconstruction construction method comprises the following steps: horizontal spacing subassembly (42) include two backup pads (421) of fixed connection in first basic supporting bench (211) upper surface, backup pad (421) upper surface is vertical to be provided with gag lever post (422), steel construction supporting beam (212) are located between two gag lever posts (422) on same first basic supporting bench (211), steel construction supporting beam (212) length direction is parallel with roof beam body (11) width direction, steel construction supporting beam (212) both ends and adjacent gag lever post (422) interval set up.
9. The reconstruction construction method for the existing expressway bridge according to claim 8, wherein the reconstruction construction method comprises the following steps: be provided with on gag lever post (422) and observe subassembly (43), observe subassembly (43) and include slip pole (431) of horizontal sliding connection on gag lever post (422), slip pole (431) are towards steel construction supporting beam (212) one end fixedly connected with butt plate (436), butt plate (436) and steel construction supporting beam (212) butt, butt plate (436) one end is kept away from in slip pole (431) and is passed gag lever post (422) fixedly connected with limiting plate (435), limiting plate (435) and gag lever post (422) butt.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717979A (en) * | 2022-04-15 | 2022-07-08 | 聚璜集团有限公司 | Bridge slab-column reinforcement structure and reinforcement method based on self-compacting concrete |
| CN116119507A (en) * | 2022-11-02 | 2023-05-16 | 山东省高速养护集团有限公司 | Triangle displacement lifting appliance capable of automatically inserting and extracting pins |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190131A (en) * | 2007-02-01 | 2008-08-21 | Tomoe Corp | Erection method for bridge girder |
| CN101545751A (en) * | 2008-03-25 | 2009-09-30 | 力帆实业(集团)股份有限公司 | Device and method for measuring verticality |
| CN202298484U (en) * | 2011-11-02 | 2012-07-04 | 中铁一局集团有限公司 | Cutting bridge pier integral body synchronization jacking construction guiding system |
| CN203755184U (en) * | 2014-03-10 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Bridge support replacement synchronous jacking system |
| CN108592883A (en) * | 2018-05-29 | 2018-09-28 | 中冶建工集团有限公司 | A kind of mold plate verticality measurement method |
| CN109778721A (en) * | 2019-02-13 | 2019-05-21 | 中铁八局集团第二工程有限公司 | Synchronization of jacking up bridge top and the bottom structure carries out the method that bridge increases transformation |
| CN110424245A (en) * | 2019-08-08 | 2019-11-08 | 中铁二十局集团第一工程有限公司 | Long span bowstring arch bridge remodeling method based on bridge hydraulic jack-up system |
| CN110700117A (en) * | 2019-08-30 | 2020-01-17 | 中铁十四局集团第四工程有限公司 | Integral synchronous jacking transformation method for overpass |
| CN210458973U (en) * | 2019-08-05 | 2020-05-05 | 中铁二十局集团第一工程有限公司 | Hydraulic jacking device with deviation correcting mechanism for bridge jacking construction |
-
2021
- 2021-10-22 CN CN202111233895.XA patent/CN113832873A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190131A (en) * | 2007-02-01 | 2008-08-21 | Tomoe Corp | Erection method for bridge girder |
| CN101545751A (en) * | 2008-03-25 | 2009-09-30 | 力帆实业(集团)股份有限公司 | Device and method for measuring verticality |
| CN202298484U (en) * | 2011-11-02 | 2012-07-04 | 中铁一局集团有限公司 | Cutting bridge pier integral body synchronization jacking construction guiding system |
| CN203755184U (en) * | 2014-03-10 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Bridge support replacement synchronous jacking system |
| CN108592883A (en) * | 2018-05-29 | 2018-09-28 | 中冶建工集团有限公司 | A kind of mold plate verticality measurement method |
| CN109778721A (en) * | 2019-02-13 | 2019-05-21 | 中铁八局集团第二工程有限公司 | Synchronization of jacking up bridge top and the bottom structure carries out the method that bridge increases transformation |
| CN210458973U (en) * | 2019-08-05 | 2020-05-05 | 中铁二十局集团第一工程有限公司 | Hydraulic jacking device with deviation correcting mechanism for bridge jacking construction |
| CN110424245A (en) * | 2019-08-08 | 2019-11-08 | 中铁二十局集团第一工程有限公司 | Long span bowstring arch bridge remodeling method based on bridge hydraulic jack-up system |
| CN110700117A (en) * | 2019-08-30 | 2020-01-17 | 中铁十四局集团第四工程有限公司 | Integral synchronous jacking transformation method for overpass |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717979A (en) * | 2022-04-15 | 2022-07-08 | 聚璜集团有限公司 | Bridge slab-column reinforcement structure and reinforcement method based on self-compacting concrete |
| CN116119507A (en) * | 2022-11-02 | 2023-05-16 | 山东省高速养护集团有限公司 | Triangle displacement lifting appliance capable of automatically inserting and extracting pins |
| CN116119507B (en) * | 2022-11-02 | 2024-02-09 | 山东省高速养护集团有限公司 | Triangle displacement lifting appliance capable of automatically inserting and extracting pins |
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Application publication date: 20211224 |