CN113279341A - Bridge resetting support and bridge resetting method - Google Patents

Abstract

The invention belongs to the technical field of bridge construction, and discloses a bridge resetting support and a bridge resetting method. First cushion cap sets up in the bottom of pier stud, and first cushion cap middle part is provided with the hole of predetermineeing that runs through first cushion cap along first cushion cap direction of height, and the pier stud passes and predetermines the hole. The first support frame is arranged on the first bearing platform, and the first support frame is arranged on two sides of the pier stud. The top of the first support frame is provided with a jacking device. The lifting device is arranged at the top end of the T-shaped beam. The suspension device comprises a joist and a connecting piece, the joist is arranged at the bottom end of the cover beam, the bottom end of the connecting piece is connected with the joist, and the top end of the connecting piece penetrates through the T-shaped beam and is connected with the lifting device. When the bridge is reset, the reconstruction pier column and the capping beam do not need to be dismantled, the construction cost and the safety risk are reduced, the working hours are reduced, and the requirement of emergency construction can be better met.

Description

Bridge resetting support and bridge resetting method

Technical Field

The invention relates to the technical field of bridge construction, in particular to a bridge resetting support and a bridge resetting method.

Background

Under the complicated geological conditions in mountain areas, the damage of the lower part structure of the bridge is caused by geological disasters or other reasons, so that the settlement of pier studs is caused, the settlement of the upper part structure is caused to be dangerous, the bridge cannot be operated, the bridge is urgently needed to be subjected to emergency repair construction, meanwhile, the emergency engineering environment is severe, the construction working face is limited, and great safety risks are brought to subsequent emergency work.

The conventional repair method at present comprises the following steps: firstly, erecting a steel pipe support, transferring the load of the upper structure to the steel pipe support, jacking and resetting, and then in-situ removing and rebuilding the pier stud and the capping beam. When the method is used for construction, after the steel support brackets on the two sides are erected, the residual working space between the pier stud capping beam and the brackets is very limited, the pier stud and the capping beam are arranged between the working surfaces, the pier stud capping beam is removed, the pier stud capping beam is newly built, inconvenience is brought, and the construction safety risk is extremely high.

Therefore, a bridge repositioning bracket and a bridge repositioning method are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a bridge resetting support and a bridge resetting method, which do not need to dismantle and rebuild pier studs and capping beams, reduce the construction cost and the safety risk, reduce the working hours and better meet the requirements of emergency construction.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bridge reduction brace, comprising:

the first bearing platform is arranged at the bottom end of a pier stud, a preset hole penetrating through the first bearing platform along the height direction of the first bearing platform is formed in the middle of the first bearing platform, and the pier stud penetrates through the preset hole;

the first support frame is arranged on the first bearing platform, and the first support frame is arranged on both sides of the pier stud;

the top ends of the first supporting frames are provided with the jacking devices, and the jacking devices can jack the T-shaped beam;

the lifting device is arranged at the top end of the T-shaped beam;

the suspension device comprises a joist and a connecting piece, the joist is arranged at the bottom end of the capping beam, the bottom end of the connecting piece is connected with the joist, the top end of the connecting piece penetrates through the T beam and is connected with the lifting device, and the lifting device can lift the capping beam through the joist;

and the horizontal position adjusting device is arranged on the joist and is used for adjusting the relative position of the cover beam and the joist along the horizontal direction.

Preferably, the lifting device comprises:

the bearing main beam is arranged at the top end of the T beam;

the first jacks are arranged on the bearing main beam at intervals, the top ends of the connecting pieces are connected with the first jacks, and the first jacks can jack the connecting pieces.

Preferably, the force-bearing main beam comprises:

a plurality of transverse distribution beams arranged at intervals along the longitudinal bridge direction;

the plurality of longitudinal distribution beams are arranged at intervals along the transverse bridge direction, and the transverse distribution beams are fixedly connected with the longitudinal distribution beams.

Preferably, the horizontal positioning device comprises:

a skid plate disposed between the capping beam and the joist;

the bracket is fixed on the joist;

the bottom end of the second jack is abutted to the bracket, and the top end of the second jack can be abutted to the side face of the cover beam.

Preferably, the joist comprises:

the joist longitudinal beams are arranged at intervals along the transverse bridge direction, and the bottom end of the connecting piece is fixedly connected with the joist longitudinal beams;

and the joist cross beams are arranged at intervals along the longitudinal bridge direction and are fixedly connected with the joist longitudinal beam.

Preferably, the lifting platform is erected at the top end of the first support frame;

the jacking device comprises:

the third jacks are arranged on the jacking platform at intervals along the transverse bridge direction and are used for jacking the T-shaped beam;

the third jack with between the jacking platform and the T roof beam with all be provided with between the jacking platform along a plurality of that first support frame direction of height stacked in proper order auxiliary stay subassembly.

Preferably, the auxiliary support assemblies comprise a bearing pipe, an upper connecting piece and a lower connecting piece, the upper connecting piece and the lower connecting piece are arranged at intervals along the axial direction of the bearing pipe, and two adjacent auxiliary support assemblies are detachably connected through the upper connecting piece and the lower connecting piece which are close to each other.

Preferably, the pier stud positioning device further comprises a limiting device, the limiting device comprises a plurality of limiting parts arranged at intervals along the circumferential direction of the pier stud, the limiting parts are fixedly arranged on the first bearing platform, and the limiting parts are abutted to the side faces of the pier stud.

Preferably, the method further comprises the following steps:

the second bearing platforms are arranged on two sides of the first bearing platform;

the second supporting frames are arranged on the second bearing platforms;

the auxiliary supporting platform is erected at the top end of the second supporting frame, and a plurality of auxiliary supporting assemblies which are sequentially stacked in the height direction of the second supporting frame are arranged at the top end of the auxiliary supporting platform and used for supporting the T beam.

A bridge resetting method adopts the bridge resetting bracket to reset a bridge, and comprises the following steps:

s1: erecting the bridge reduction support;

s2: starting a jacking device, jacking the T-shaped beam until the T-shaped beam is reset;

s3: starting a lifting device to lift the connecting piece, enabling the joist to be abutted against the bottom end of the capping beam and applying lifting force to the capping beam, and ensuring that the lifting force of the joist to the capping beam can bear the total dead weight of the capping beam and the partial dead weight of the pier stud;

s4: cutting off the pier column at the root of the pier column, and chiseling concrete at the lower end of the pier column on the basis of keeping the main ribs of the pier column;

s5: starting a lifting device to lift the connecting piece, and resetting the cover beam and the pier stud on a height index;

s6: resetting the bent cap and the pier stud on a horizontal position index by using a horizontal position adjusting device;

s7: arranging steel bars at the lower end of the pier stud, and pouring the part of the pier stud in the preset hole of the first bearing platform and the first bearing platform into a whole;

s8: after the strength of newly poured concrete reaches the design requirement, opening the lifting device to slowly lower the connecting piece, so that the stress of the first bearing platform and the pier stud is increased, and the stress of the connecting piece is reduced until the dead weight of the cover beam and the dead weight of the pier stud are completely borne by the first bearing platform;

s9: and removing the bridge resetting support.

The invention has the beneficial effects that:

the bridge resetting support provided by the invention has the advantages that the T-shaped beam is jacked by the jacking devices arranged on the first support frames at two sides of the first bearing platform, so that the T-shaped beam is reset; the lifting device arranged on the T beam lifts the joist through the connecting piece, and the joist lifts the capping beam to reset the capping beam and the pier stud connected with the capping beam to the designed height; the relative position of the bent cap and the joist is adjusted through the horizontal position adjusting device, so that the position of the bent cap in the horizontal direction is adjusted, and the bent cap and the pier stud connected to the bent cap are reset in the horizontal direction. The pier stud bottom passes the hole of predetermineeing on the cushion cap, all resets the back at T roof beam, bent cap and pier stud, pours pier stud bottom and first cushion cap as an organic whole, can accomplish the restoration of bridge. The pier stud and the bent cap which are arranged at present are utilized to reset, the pier stud and the bent cap do not need to be dismantled and rebuilt, the dismantling cost of the bent cap and the pier stud and the cost of the subsequent pouring of the pier stud and the bent cap are saved, the construction cost is reduced, the risk that supports on two sides are smashed by the sliding of the blocks when the pier stud and the bent cap are dismantled in cutting is avoided, the construction safety risk is reduced, the problem that the narrow space is not easy to hoist when the pier stud and the bent cap are dismantled in cutting is also avoided, and therefore the construction difficulty is reduced. And the working hours of dismantling and the working hours of pouring the pier stud and the capping beam in the later period are reduced, and the requirement of emergency construction can be better met.

Drawings

FIG. 1 is a schematic structural diagram of a bridge reduction support according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic view of a part of a bridge reduction bracket according to an embodiment of the present invention;

FIG. 4 is a schematic view of a partial structure of a bridge reduction bracket according to an embodiment of the present invention;

FIG. 5 is a schematic view of a part of a bridge reduction bracket according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an auxiliary support assembly of a bridge reduction support according to an embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of a bridge reduction bracket according to an embodiment of the present invention.

In the figure:

100. pier studs; 200. a T-beam; 300. a capping beam;

11. a first bearing platform;

12. a first support frame; 121. a first upright post;

13. a jacking device; 131. a third jack; 132. an auxiliary support assembly; 1321. a load bearing tube; 1322. an upper connecting piece; 1323. a lower connecting piece;

14. a lifting device; 141. a force-bearing main beam; 1411. a transverse distribution beam; 1412. a longitudinal distribution beam; 142. a first jack; 143. an upper anchorage device; 144. a brace;

15. a suspension device; 151. a joist; 1511. a joist stringer; 1512. a joist beam; 152. a connecting member; 153. a lower anchorage device;

16. a horizontal positioning device; 161. a slide plate; 162. a bracket; 163. a second jack;

17. jacking a platform;

18. a limiting device; 181. a limiting member;

19. a second platform;

20. a second support frame; 201. a second upright post;

21. an auxiliary support platform;

22. a first pile pier; 23. and a second pier.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 3, the present embodiment provides a bridge repositioning bracket, which includes a first supporting platform 11, a first supporting frame 12, a jacking device 13, a lifting device 14, a suspension device 15, and a horizontal positioning device 16. First cushion cap 11 sets up in the bottom of pier stud 100, and first cushion cap 11 middle part is provided with and runs through the hole of predetermineeing of first cushion cap 11 along 11 direction of height of first cushion cap, and pier stud 100 passes and predetermines the hole. The first support frames 12 are arranged on the first bearing platform 11, and the first support frames 12 are arranged on two sides of the pier stud 100. The top of the first supporting frame 12 is provided with a jacking device 13, and the jacking device 13 can jack the T-shaped beam 200. The lifting device 14 is disposed at the top end of the T-beam 200. The suspension device 15 comprises a joist 151 and a connector 152, the joist 151 is arranged at the bottom end of the capping beam 300, the bottom end of the connector 152 is connected with the joist 151, the top end of the connector passes through the T-beam 200 to be connected with the lifting device 14, and the lifting device 14 can lift the capping beam 300 through the joist 151. The horizontal positioning device 16 is disposed on the joist 151 and is used for adjusting the relative position of the capping beam 300 and the joist 151 along the horizontal direction.

In the bridge resetting bracket provided by the embodiment, the T-shaped beam 200 is jacked up by the jacking devices 13 arranged on the first supporting frames 12 at two sides of the first bearing platform 11, so that the T-shaped beam 200 is reset; the bottom end of the pier 100 is cut off the pier 100, the joist 151 is lifted by the lifting device 14 arranged on the T-beam 200 through the connecting piece 152, the joist 151 lifts the capping beam 300, the capping beam 300 and the pier 100 connected to the capping beam 300 are reset to the designed height, the relative position of the capping beam 300 and the joist 151 is adjusted through the horizontal position adjusting device 16, the position of the capping beam 300 in the horizontal direction is adjusted, and the capping beam 300 and the pier 100 connected to the capping beam 300 are reset in the horizontal direction. The hole of predetermineeing on the pier stud 100 bottom passes first cushion cap 11, all resets the back at T roof beam 200, bent cap 300 and pier stud 100, pours pier stud 100 bottom and first cushion cap 11 as an organic whole, can accomplish the restoration of bridge. The existing pier stud 100 and the existing coping 300 are utilized to reset without dismantling and rebuilding the pier stud 100 and the coping 300, the dismantling cost of the coping 300 and the pier stud 100 and the subsequent cost of pouring the pier stud 100 and the coping 300 again are saved, the construction cost is reduced, the risk that the first support frames 12 on both sides are knocked down by the sliding of the blocks when the pier stud 100 and the coping 300 are dismantled by cutting is avoided, the safety risk of construction is reduced, the problem that the operation space is not easy to hoist when the pier stud 100 and the coping 300 are dismantled by cutting is also avoided, and the construction difficulty is reduced. And the working hours for dismantling and the working hours for pouring the pier stud 100 and the bent cap 300 at the later stage are reduced, and the requirements of emergency construction can be better met.

Preferably, a plurality of reserved anchor bars are arranged on the hole wall of the preset hole of the first bearing platform 11 at intervals along the circumferential direction of the preset hole, one end of each reserved anchor bar extends into the first bearing platform 11 and is fixedly connected with the main steel reinforcement framework of the first bearing platform 11, and the other end of each reserved anchor bar extends into the preset hole. When carrying out the bridge and reseing, cut off pier stud 100's root after, chiseled the concrete of pier stud 100 lower extreme on the basis of keeping pier stud 100 main muscle, then carry out pier stud 100's the operation that resets through hoisting device 14 again, pier stud 100 resets the back, arrange the main muscle of pier stud 100 lower extreme into loudspeaker form, use the reinforcing bar to indulge the bridge to the hole of will predetermineeing two liang of links together of anchor bars of reservation of bridge to both ends along indulging the bridge, then use the reinforcing bar to will predetermine the hole cross bridge to two liang of links together of anchor bars of reservation at both ends along the cross bridge. The transverse bridge connecting the preset hole transverse bridge to the transverse bridge reinforcing steel bars with the reserved anchor bars at two ends and the longitudinal bridge connecting the preset hole longitudinal bridge to the longitudinal bridge reinforcing steel bars with the reserved anchor bars at two ends are bound and fixed through the coil wires, and the transverse bridge reinforcing steel bars and the reserved anchor bars as well as the longitudinal bridge reinforcing steel bars and the reserved anchor bars are welded and fixed. The main muscle interval of pier stud 100 lower extreme is inserted in horizontal bridge to the reinforcing bar and is indulged the gap between the bridge to the reinforcing bar to guarantee pier stud 100 and the structural strength of first cushion cap 11 junction after pouring as an organic whole with first cushion cap 11.

Optionally, as shown in fig. 1, the bridge resetting support provided in this embodiment further includes a plurality of first piers 22 disposed below the first platform 11 at intervals, specifically, in this embodiment, the first piers 22 are provided with four, which are divided into two rows, two rows of the first piers 22 are respectively disposed on two sides of the pier 100 to be reset, each row of the first piers 22 is disposed at intervals along the transverse bridge direction, the top end of the first pier 22 is fixedly connected to the first platform 11, the bottom end of the first pier extends into the ground, and the first pier 22 plays a role of supporting the first platform 11, so as to avoid the first platform 11 from sinking.

Optionally, as shown in fig. 1, 3 and 4, the lifting device 14 includes a messenger main beam 141 and a plurality of first jacks 142. The bearing main beam 141 is arranged at the top end of the T beam 200. The messenger main beam 141 includes a plurality of transverse distribution beams 1411 and a plurality of longitudinal distribution beams 1412. A plurality of transverse distribution beams 1411 are provided at intervals in the longitudinal bridge direction. The plurality of longitudinal distribution beams 1412 are arranged at intervals along the transverse bridge direction, and the transverse distribution beams 1411 are fixedly connected with the longitudinal distribution beams 1412. Specifically, in the present embodiment, two transverse distribution beams 1411 and two longitudinal distribution beams 1412 are provided, the two transverse distribution beams 1411 are erected on the T-beam 200, and two ends of the longitudinal distribution beam 1412 are erected on the two transverse distribution beams 1411, respectively. By arranging the plurality of transverse distribution beams 1411 and the plurality of longitudinal distribution beams 1412, the force of the connecting piece 152 on the first jack 142 is distributed on the T-shaped beam 200, and the T-shaped beam 200 is prevented from being damaged due to over-concentrated force. Preferably, the transverse distribution beam 1411 and the longitudinal distribution beam 1412 are both formed by processing section steel-clad steel plates. The plurality of first jacks 142 are arranged on the force bearing main beam 141 at intervals, the top ends of the connecting pieces 152 are connected with the first jacks 142, and the first jacks 142 can jack the connecting pieces 152. Specifically, in this embodiment, four first jacks 142 are provided, two ends of two longitudinal distribution beams 1412 are respectively provided with one first jack 142, through holes are formed in positions where the first jacks 142 are installed on the longitudinal distribution beams 1412, the top ends of the connecting pieces 152 are connected with the first jacks 142, and the bottom ends of the connecting pieces pass through the through holes on the longitudinal distribution beams 1412 and are connected with the joists 151. Preferably, connecting piece 152 is the steel strand wires, steel strand wires structural strength is big, and be convenient for connect, first jack 142 is the punching jack, hoisting device 14 still includes upper anchorage device 143 and brace 144, brace 144 sets up in the top of vertical distribution roof beam 1412, the bottom of first jack 142 is fixed in on vertical distribution roof beam 1412 through brace 144, upper anchorage device 143 sets up in the top of first jack 142, the top of connecting piece 152 is connected on upper anchorage device 143, first jack 142 cooperates upper anchorage device 143 to jack up connecting piece 452, the theory of operation of punching jack jacking steel strand wires is ripe prior art, it is no longer repeated here. The lifting device 14 in this embodiment further includes a plc hydraulic synchronous jacking system, and the plc hydraulic synchronous jacking system controls the four first jacks 142 to synchronously jack the connecting member 152, so as to prevent the joist 151 from deflecting during jacking.

Optionally, as shown in fig. 1 and 5, the joist 151 includes a plurality of joist stringers 1511 and a plurality of joist cross-beams 1512. The length direction of joist longeron 1511 is along the longitudinal bridge to, and a plurality of joist longerons 1511 set up along the horizontal bridge to the interval, and the bottom and the joist longeron 1511 of connecting piece 152 link firmly. The length direction of joist crossbeam 1512 is along horizontal bridge to, and a plurality of joist crossbeams 1512 are along the vertical bridge to the interval setting, and joist crossbeam 1512 links firmly with joist longeron 1511. Specifically, in the present embodiment, two joist longitudinal beams 1511 and joist transverse beams 1512 are provided. Two joist longerons 1511 all are provided with between two pier stud 100, and its both ends stretch out the both sides of bent cap 300 horizontal bridge, and two joist crossbeams 1512 are located the both sides of bent cap 300 horizontal bridge respectively. The suspension device 15 further comprises lower anchors 153, the lower anchors 153 are arranged at the bottom ends of the joist longitudinal beams 1511, specifically, the lower anchors 153 are four, the four lower anchors 153 are respectively arranged at two ends of the two joist longitudinal beams 1511, and the bottom end of the connecting piece 152 penetrates through the joist longitudinal beams 1511 to be fixedly connected with the lower anchors 153.

Alternatively, as shown in fig. 1 and 2, the horizontal positioning device 16 includes a sliding plate 161, a bracket 162, and a second jack 163. The skid plate 161 is disposed between the capping beam 300 and the joist 151. Specifically, a sliding plate 161 is disposed between the two joist stringers 1511 of the joist 151 and the cap beam 300 to reduce the friction between the cap beam 300 and the joist stringers 1511, and in this embodiment, the sliding plate 161 is a teflon sliding plate. The bracket 162 is fixed to the joist 151. The second jack 163 can abut against the bracket 162 at its bottom end and the side surface of the bent cap 300 at its top end. Specifically, in this embodiment, two ends of each of the two joist longitudinal beams 1511 are provided with brackets 162, the bottom ends of the second jacks 163 are fixed to the brackets 162, the top ends face to the side close to the capping beam 300, and the capping beam 300 is driven by the second jacks 163 to move in the horizontal direction relative to the joist longitudinal beam 1511, so as to adjust the position of the capping beam 300 in the horizontal direction, and thus, the capping beam 300 and the pier stud 100 connected to the capping beam 300 are reset in the horizontal direction.

Alternatively, as shown in fig. 1 and 6, the first support frame 12 includes a plurality of first uprights 121 spaced apart in the cross-bridge direction. The bridge support provided by the embodiment further comprises a jacking platform 17 erected at the top end of the first support frame 12. The jacking device 13 includes a plurality of third jacks 131 and an auxiliary support assembly 132. The third jacks 131 are arranged on the jacking platform 17 at intervals along the transverse bridge direction and used for jacking the T-shaped beam 200. A plurality of auxiliary support assemblies 132 stacked in sequence along the height direction of the first support frame 12 are arranged between the third jack 131 and the jacking platform 17 and between the T-beam 200 and the jacking platform 17. When the third jack 131 is used for jacking the T-beam 200, the third jack 131 jacks the T-beam 200 upwards for a certain distance, the auxiliary support assembly 132 is filled in a gap between the T-beam 200 and the jacking platform 17 to support the T-beam 200, the top rod of the third jack 131 is retracted, the third jack 131 is taken out from the lower part of the T-beam 200, the auxiliary support assembly 132 is stuffed at the position of the original third jack 131, the third jack 131 is dropped on the stuffed auxiliary support assembly 132 to jack the third jack 131, and the steps are repeated until the T-beam 200 is jacked to the set position.

Alternatively, as shown in fig. 6, the auxiliary support assemblies 132 include a bearing pipe 1321, an upper connector 1322 and a lower connector 1323, the upper connector 1322 and the lower connector 1323 are spaced apart in the axial direction of the bearing pipe 1321, and adjacent two auxiliary support assemblies 132 are detachably connected by the upper connector 1322 and the lower connector 1323 adjacent to each other. Thereby ensuring a stable connection between two adjacent auxiliary support members 132.

Optionally, as shown in fig. 1, fig. 3, and fig. 7, the bridge support provided in this embodiment further includes a limiting device 18, the limiting device 18 includes a plurality of limiting members 181 arranged at intervals along the circumferential direction of the pier stud 100, the limiting members 181 are fixedly disposed on the first supporting platform 11, and the limiting members 181 abut against the side surfaces of the pier stud 100. Guarantee that pier stud 100 does not take place the displacement after pier stud 100 bottom is cut off, avoid the work progress to take place dangerously, also be convenient for follow-up to pier stud 100 reset.

Optionally, as shown in fig. 1, the bridge support provided in this embodiment further includes a second bearing platform 19, a second support frame 20, and an auxiliary support platform 21. The two sides of the first bearing platform 11 are provided with second bearing platforms 19. The second bearing platforms 19 are provided with second support frames 20. The auxiliary supporting platform 21 is erected on the top end of the second supporting frame 20, and a plurality of base plates which are sequentially stacked along the height direction of the second supporting frame 20 are arranged on the top end of the auxiliary supporting platform 21 and used for supporting the T-shaped beam 200. The T beam 200 is supported by the second support frame 20 in an auxiliary mode, and the T beam 200 is prevented from being damaged due to stress concentration. Specifically, in this embodiment, the second supporting frame 20 is provided with ten second vertical columns 201, which are divided into two groups, each group has five second vertical columns 201, and the five second vertical columns 201 of each group are arranged at intervals along the transverse bridge direction. The second bearing platform 19 comprises two second cross beams and five second longitudinal beams, the top end of each group of upright posts is provided with one second cross beam, the second longitudinal beams are erected on the two second cross beams, and one second longitudinal beam is erected to the tops of the two adjacent upright posts along the longitudinal bridge. Connecting rods are arranged between two adjacent second upright columns 201, between two adjacent first upright columns 121 and between the adjacent second upright columns 201 and the adjacent first upright columns 121, and the first support frame 12 and the second support frame 20 are connected into a whole so as to heighten the stability of the first support frame 12 and the second support frame 20.

Optionally, as shown in fig. 1, the bridge repositioning bracket provided in this embodiment further includes a plurality of second piers 23 disposed at intervals, the second piers 23 are disposed below the second platform 19, the top ends of the second piers 23 are fixedly connected to the second platform 19, the bottom ends of the second piers 23 extend into the ground, and the second piers 23 play a role in supporting the second platform 19 to prevent the second platform 19 from sinking. In the soft geological region, the second bearing platform 19 can be prevented from sinking by arranging a second pier 23 below the second bearing platform 19 as a temporary support.

The embodiment also provides a bridge restoration method, wherein the bridge to be restored is restored by adopting the bridge restoration support, and the bridge restoration method provided by the embodiment comprises the following steps:

s1: as shown in fig. 1, the bridge reduction support is set up, which comprises the following steps:

s11: pouring a first bearing platform 11, wherein a preset hole penetrating through the bearing platform along the height direction of the bearing platform is formed in the middle of the first bearing platform 11, the pier stud 100 to be repaired penetrates through the preset hole, a plurality of reserved anchor bars are arranged on the wall of the preset hole at intervals along the circumferential direction of the preset hole, one end of each reserved anchor bar extends into the first bearing platform 11 and is fixedly connected with a main steel reinforcement framework of the first bearing platform 11, and the other end of each reserved anchor bar extends into the preset hole;

s12: respectively pouring a second bearing platform 19 on two sides of the first bearing platform 11;

s13: building a first support frame 12 on a first bearing platform 11, building a jacking platform 17 on the top 12 of the first support frame, and erecting a third jack 131 and an auxiliary support assembly 132 on the jacking platform 17; a second support frame 20 is built on the second bearing platform 19, an auxiliary support platform 21 is built at the top end of the second support frame 20, and an auxiliary support assembly 132 is arranged on the auxiliary support platform 21; mounting a lifting device 14 on the T-beam 200; a scaffold frame is arranged between the two first support frames 12, a splicing platform is arranged on the scaffold frame, a joist 151 is arranged on the splicing platform, a hole is formed in the T-shaped beam 200, and the joist 151 is connected with the lifting device 14 through a connecting piece 152; a stopper 18 is mounted on the first platform 11.

S2: starting the jacking device 13, jacking the T-shaped beam 200 until the T-shaped beam 200 is reset, specifically, firstly jacking the T-shaped beam 200 upwards for a certain distance by the third jack 131, the auxiliary support assembly 132 is filled in the gap between the T-beam 200 and the jacking platform 17 to support the T-beam 200, the jack rods of the third jacks 131 are retracted, and the third jacks 131 are taken out from the lower side of the T-beam 200, the auxiliary supporting member 132 is stuffed at the position of the original third jack 131, and the third jack 131 is dropped on the stuffed auxiliary supporting member 132, the third jack 131 is used for filling, the steps are repeated until the T beam 200 is lifted to the set position, the T-beam 200 is supported by stuffing the auxiliary support assembly 132 on the auxiliary support platform 21 at the top end of the second support frame 20 during the lifting of the T-beam 200, so as to play a role of auxiliary support of the T-beam 200 and avoid the T-beam 200 from being damaged due to concentrated stress.

S3: the lifting device 14 is activated to lift the connecting member 152, so that the joist 151 abuts against the bottom end of the capping beam 300 and applies a lifting force to the capping beam 300, thereby ensuring that the lifting force of the joist 151 on the capping beam 300 can bear the whole dead weight of the capping beam 300 and a part of the dead weight of the pier stud 100.

S4: the pier 100 is cut at the root of the pier 100, and the concrete at the lower end of the pier 100 is chiseled off while the main ribs of the pier 100 are retained, and the limiting device 18 on the first bearing platform 11 is released, so that the pier 100 and the bent cap 300 are kept vertical under the action of self weight.

S5: the lifting device 14 is activated to lift the connector 152, resetting the cap beam 300 and the pier 100 at the height level.

S6: the horizontal position adjusting device 16 is used for resetting the capping beam 300 and the pier stud 100 on the horizontal position index, specifically, the capping beam 300 is manually and slowly jacked and moved on the assembly platform by using the third jack 131, and the capping beam 300 slides relative to the two joist longitudinal beams 1511 of the joist 151 through the sliding plate 161 until the capping beam 300 and the pier stud 100 connected to the capping beam 300 are reset on the horizontal position index.

S7: the main reinforcement at the lower end of the pier stud 100 is arranged in a horn shape, the reinforcing steel bars are used for connecting the reserved anchor bars at the two ends of the longitudinal bridge of the preset hole along the longitudinal bridge direction in pairs, and then the reinforcing steel bars are used for connecting the reserved anchor bars at the two ends of the transverse bridge of the preset hole along the transverse bridge direction in pairs. The transverse bridge connecting the preset hole transverse bridge to the transverse bridge reinforcing steel bars with the reserved anchor bars at two ends and the longitudinal bridge connecting the preset hole longitudinal bridge to the longitudinal bridge reinforcing steel bars with the reserved anchor bars at two ends are bound and fixed through the coil wires, and the transverse bridge reinforcing steel bars and the reserved anchor bars as well as the longitudinal bridge reinforcing steel bars and the reserved anchor bars are welded and fixed. The main reinforcement of pier stud 100 lower extreme is inserted at the interval and is violently bridged to the clearance between the reinforcing bar to the reinforcing bar with indulging, pours as an organic whole with first cushion cap 11 with pier stud 100 position in first cushion cap 11 default hole. Thereby insert the structural strength of pier stud 100 and first cushion cap 11 junction in the clearance between horizontal bridge to reinforcing bar and the vertical bridge to the reinforcing bar through the main muscle interval with pier stud 100 lower extreme.

S8: after the strength of the newly poured concrete reaches the design requirement, the lifting device 14 is started to slowly lower the connecting piece 152, so that the stress of the first bearing platform 11 and the pier stud 100 is increased, and the stress of the connecting piece 152 is reduced until the dead weight of the cover beam 300 and the dead weight of the pier stud 100 are completely borne by the first bearing platform 11.

S9: and (5) dismantling the bridge resetting support.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bridge support that resets which characterized in that includes:

the first bearing platform (11) is arranged at the bottom end of the pier stud (100), a preset hole penetrating through the first bearing platform (11) along the height direction of the first bearing platform (11) is formed in the middle of the first bearing platform (11), and the pier stud (100) penetrates through the preset hole;

the first support frame (12) is arranged on the first bearing platform (11), and the first support frame (12) is arranged on both sides of the pier stud (100);

the top end of the first support frame (12) is provided with the jacking device (13), and the jacking device (13) can jack the T-shaped beam (200);

a lifting device (14) arranged at the top end of the T-beam (200);

the suspension device (15) comprises a joist (151) and a connecting piece (152), the joist (151) is arranged at the bottom end of the cover beam (300), the bottom end of the connecting piece (152) is connected with the joist (151), the top end of the connecting piece penetrates through the T beam (200) to be connected with the lifting device (14), and the lifting device (14) can lift the cover beam (300) through the joist (151);

and the horizontal positioning device (16) is arranged on the joist (151) and is used for adjusting the relative position of the cover beam (300) and the joist (151) along the horizontal direction.

2. The bridge reduction bracket of claim 1, wherein the lifting device (14) comprises:

a force-bearing main beam (141) which is arranged at the top end of the T beam (200);

the lifting device comprises a plurality of first jacks (142), wherein the first jacks are arranged on a bearing main beam (141) at intervals, the top ends of connecting pieces (152) are connected with the first jacks (142), and the first jacks (142) can lift the connecting pieces (152).

3. The bridge reduction support according to claim 2, wherein the messenger girder (141) comprises:

a plurality of transverse distribution beams (1411) spaced apart along the longitudinal bridge direction;

a plurality of longitudinal distribution beams (1412) arranged at intervals along a transverse bridge direction, wherein the transverse distribution beams (1411) are fixedly connected with the longitudinal distribution beams (1412).

4. The bridge reduction support according to claim 1, wherein the horizontal positioning means (16) comprise:

a skid plate (161) disposed between the capping beam (300) and the joist (151);

a bracket (162) fixed to the joist (151);

and a second jack (163) having a bottom end abutting against the bracket (162) and a top end capable of abutting against a side surface of the bent cap (300).

5. The bridge reduction bracket of claim 1, wherein the joist (151) comprises:

the joist longitudinal beams (1511) are arranged at intervals along the transverse bridge direction, and the bottom ends of the connecting pieces (152) are fixedly connected with the joist longitudinal beams (1511);

the joist transverse beams (1512) are arranged at intervals along the longitudinal bridge direction, and the joist transverse beams (1512) are fixedly connected with the joist longitudinal beams (1511).

6. The bridge reduction support according to claim 1, further comprising a jacking platform (17) mounted on the top end of the first support frame (12);

the jacking device (13) comprises:

the third jacks (131) are arranged on the jacking platform (17) at intervals along the transverse bridge direction and are used for jacking the T-shaped beam (200);

auxiliary stay subassembly (132), third jack (131) with between jacking platform (17) and T roof beam (200) with all be provided with between jacking platform (17) along a plurality of that first support frame (12) direction of height stacks in proper order auxiliary stay subassembly (132).

7. The bridge reduction support according to claim 6, wherein the auxiliary support assemblies (132) comprise a bearing tube (1321), an upper connector (1322) and a lower connector (1323), the upper connector (1322) and the lower connector (1323) are arranged at intervals along the axial direction of the bearing tube (1321), and two adjacent auxiliary support assemblies (132) are detachably connected through the upper connector (1322) and the lower connector (1323) close to each other.

8. The bridge reduction bracket according to claim 1, further comprising a limiting device (18), wherein the limiting device (18) comprises a plurality of limiting members (181) arranged along the circumference of the pier stud (100) at intervals, the limiting members (181) are fixedly arranged on the first bearing platform (11), and the limiting members (181) are abutted against the side surface of the pier stud (100).

9. The bridge reduction bracket of claim 6, further comprising:

the second bearing platform (19) is arranged on each of two sides of the first bearing platform (11);

the second supporting frames (20) are arranged on the second bearing platforms (19);

and the auxiliary supporting platform (21) is erected at the top end of the second supporting frame (20), and a plurality of base plates which are sequentially stacked in the height direction of the second supporting frame (20) are arranged at the top end of the auxiliary supporting platform (21) and used for supporting the T beam (200).

10. A bridge reduction method, characterized in that the bridge reduction bracket according to any one of claims 1 to 9 is used for reducing the bridge, comprising the following steps:

s1: erecting the bridge reduction support;

s2: starting a jacking device (13) to jack the T beam (200) until the T beam (200) is reset;

s3: starting a lifting device (14) to lift the connecting piece (152), enabling the joist (151) to be abutted against the bottom end of the capping beam (300) and exerting lifting force on the capping beam (300), and ensuring that the lifting force of the joist (151) on the capping beam (300) can bear the total dead weight of the capping beam (300) and partial dead weight of the pier stud (100);

s4: cutting off the pier stud (100) at the root of the pier stud (100), and chiseling concrete at the lower end of the pier stud (100) on the basis of keeping the main rib of the pier stud (100);

s5: starting a lifting device (14) to lift the connecting piece (152) and reset the cover beam (300) and the pier stud (100) on the height index;

s6: resetting the bent cap (300) and the pier stud (100) on a horizontal position index by using a horizontal positioning device (16);

s7: arranging steel bars at the lower end of the pier stud (100), and pouring the part, located in the preset hole of the first bearing platform (11), of the pier stud (100) and the first bearing platform (11) into a whole;

s8: after the strength of newly poured concrete reaches the design requirement, opening the lifting device (14) and slowly lowering the connecting piece (152) to increase the stress of the first bearing platform (11) and the pier stud (100) and reduce the stress of the connecting piece (152) until the dead weight of the cover beam (300) and the dead weight of the pier stud (100) are completely borne by the first bearing platform (11);

s9: and removing the bridge resetting support.

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