CN112482251B - Load transfer type bridge reinforcing structure and construction method thereof - Google Patents
Load transfer type bridge reinforcing structure and construction method thereof Download PDFInfo
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- CN112482251B CN112482251B CN202011344840.1A CN202011344840A CN112482251B CN 112482251 B CN112482251 B CN 112482251B CN 202011344840 A CN202011344840 A CN 202011344840A CN 112482251 B CN112482251 B CN 112482251B
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract 2
- 230000032683 aging Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 230000006378 damage Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006748 scratching Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention relates to the technical field of bridge reinforcement, and particularly discloses a load transfer type bridge reinforcing structure and a construction method thereof. Including bridge floor and pier, be equipped with the collar tie beam on four adjacent piers, the collar tie beam includes crossbeam and longeron, the fixed steel cable that evenly arranges in longeron upper portion, be equipped with the arch girder that evenly arranges along the crossbeam direction on the steel cable, the both ends of arch girder are equipped with arc connecting portion, arc connecting portion cup joint respectively on two steel cables in the outside, the protruding end and the bridge floor in close contact with of arch girder, both sides the crossbeam evenly is equipped with the lift groove towards the central direction on, the lift groove is located between two adjacent arch girders, both sides be equipped with the backup pad in the lift inslot that corresponds on the crossbeam. This technical scheme is used for the dispersion bridge floor load, with the power dispersion that receives on the bridge floor and transmit to the pier to promote the bearing capacity of ageing bridge floor in service, avoid causing the condition of collapsing because bearing overloads and take place.
Description
Technical Field
The invention relates to the technical field of bridge reinforcement, and particularly discloses a load transfer type bridge reinforcement structure and a construction method thereof.
Background
With the construction of traffic, the bridge such as a highway bridge, a railway bridge and the like which is visible everywhere at present is constructed by erecting piers according to a planned route and reinforcing a formed bridge deck above the piers, but with the rapid development of the traffic industry in China, vehicles tend to be gradually enlarged, and particularly with the appearance of overloaded trucks on some traffic main lines, the safety of the bridge in service along the line is greatly threatened. In recent years, accidents in which overloaded trucks collapse bridges have frequently occurred, such as: the black dragon river bridge in 2009, the jilin jingjiang bridge in 2010, the beijing huai rou white river bridge in 2011 and the harbin yangming beach bridge in 2012 all collapse due to serious overloading of trucks.
According to the case of the bridge collapse accident, the main reason of the accident is that the bridge deck is not aged enough to bear larger load, and the part of the bridge pavement far away from the bridge piers cannot actually transfer the load to the bridge piers, so that the local bearing pressure of the bridge deck is large, the bridge pavement is broken, and the bridge collapse accident is caused, and therefore the reinforcing structure for dispersing the bridge deck load is very important.
Disclosure of Invention
In view of the above, the present invention provides a load transfer type bridge reinforcing structure and a construction method thereof, which are used for dispersing bridge deck load and transferring force applied to a bridge deck to piers, thereby improving the pressure bearing capacity of the bridge deck of an aged bridge in service and avoiding collapse caused by overload bearing.
In order to achieve the purpose, the invention provides the following technical scheme:
a load transfer type bridge reinforcing structure comprises a bridge floor and bridge piers, ring beams are arranged on four adjacent bridge piers and comprise cross beams and longitudinal beams, steel ropes which are uniformly distributed are fixedly arranged on the upper portions of the longitudinal beams, arch-shaped cross beams which are uniformly distributed along the direction of the cross beams are arranged above the steel ropes, arc-shaped connecting portions are arranged at two ends of each arch-shaped cross beam and are respectively sleeved on two steel ropes on the outermost side, protruding ends of the arch-shaped cross beams are in close contact with the bridge floor, lifting grooves are uniformly arranged on the cross beams on two sides towards the central direction, the lifting grooves are positioned between the two adjacent arch-shaped cross beams, supporting plates are arranged in corresponding lifting grooves on the cross beams on the two sides, two ends of each supporting plate are respectively positioned in the lifting grooves on the two sides, each supporting plate is positioned above the steel ropes, the bottom surface of each supporting plate is in close contact with the steel ropes, and inverted V-shaped supporting frames are arranged in the middles of the adjacent supporting plates, the top end of the inverted V-shaped support frame is fixedly connected with the middle part of the arched girder.
The working principle of the technical scheme is as follows: when the bearing capacity above the bridge pavement is overlarge, the bridge pavement can generate bending deformation downwards and transmit the bearing capacity to the arched girders and arched trabeculae below, the arched girders and the arched trabeculae transmit the received force to the inverted V-shaped supporting frames, the inverted V-shaped supporting frames directly act on the supporting plates, because the support plate is arranged on the steel rope, the steel rope has certain elastic deformation capacity, the support plate can move up and down in the lifting groove, can cushion the power that receives, the backup pad has received evenly on transmitting the steel cable simultaneously, and on the ring roof beam in the outside was transmitted power to the steel cable, the power direct action that the ring roof beam received utilized the pier directly to bear the great load that each position received on the bridge floor, avoided bridge floor local load too big, caused the damage of collapsing.
The support frame has the advantages that the protruding ends of the arched small beams are contacted with the bottom of the bridge floor, so that the support parts of the bridge floor by the structure are increased, and the structure can better support the bridge floor and transmit force.
Further inject, the crossbeam and the longeron contact site of circle roof beam are equipped with the go-between, the tip fixed connection of crossbeam and longeron is on the go-between, just the pier passes the go-between, and its beneficial part lies in, and the go-between can be more convenient form the circle roof beam with crossbeam and longeron on the pier, and the go-between is connected through the mode and the pier that cup joint, avoids causing the damage to the pier at crossbeam and longeron and the direct fixed connection of pier to the atress structure that leads to the pier suffers destruction.
Further inject, the lower extreme of go-between is equipped with the locking staple bolt, the locking staple bolt reciprocates spacingly to the go-between, and its beneficial part lies in, and the staple bolt is spacing to the go-between, makes the go-between can not be on the pier gliding downwards to strengthen the power conduction effect of this structure.
Further limiting, the depth of the lifting groove is two thirds of the height of the cross beam, and the lifting groove is formed downwards from the upper surface of the cross beam.
Further inject, the dashpot has been seted up to the both sides of lift groove, be equipped with buffer spring in the dashpot, buffer spring's one end and the side fixed connection of backup pad, buffer spring's the other end and a side fixed connection of dashpot, its beneficial part lies in, when the bridge floor takes place the level under earthquake or exogenic action and rocks, the backup pad receives the moment on the horizontal direction when will under the effect of power conduction, the horizontal moment that buffer spring will receive to the backup pad that sets up in the dashpot this moment cushions, and support and take place the small distance displacement in the horizontal direction, borrow this internal energy that makes horizontal moment to be consumed, make the stability of bridge floor better.
Further, the foundation parts of the arched girder and the arched trabeculae on the bottom surface of the bridge floor are respectively provided with a rubber block in a cushioning and anti-skidding mode.
The invention also discloses a construction method of the load transfer type bridge reinforcing structure, which comprises the following steps:
(1) sleeving the connecting rings on four adjacent piers respectively, and then welding the openings;
(2) fixing the anchor ear below the connecting ring, and limiting the height of the ring beam on the pier;
(3) longitudinal beams on two sides are symmetrically provided with through holes through which steel ropes pass in advance, and cross beams on two sides are symmetrically and uniformly provided with lifting grooves in advance;
(4) welding the cross beam and the longitudinal beam on the connecting ring to form a rectangular ring beam;
(5) penetrating a steel rope into the through holes on the longitudinal beams on the two sides, fixing one end of the steel rope on the outer side of the cross beam on one side, then pre-tightening the steel rope at the other end by using a pre-tightening device, fixing the steel rope on the outer side of the longitudinal beam on the other side, and then loosening the pre-tightening device;
(6) the arc-shaped connecting parts at the two ends of the arch girder are sleeved on the two steel ropes at the outermost side, and the protruding end of the arch girder abuts against the bottom of the bridge floor;
(7) placing a support plate on the steel rope, wherein two ends of the support plate are positioned in the lifting grooves of the symmetrically arranged beams;
(8) welding the top end of the inverted V-shaped support frame below the middle part of the arched girder, and then welding the two ends of the inverted V-shaped support frame at the middle part of the support plate;
(9) and welding two ends of the arched small beams on the side walls of the adjacent inverted V-shaped support frames, wherein the upper parts of the protruding ends of the arched small beams are in close contact with the bridge floor.
And (2) further limiting, before the step (1), arranging an annular rubber layer between the connecting ring and the pier, wherein the rubber layer has the advantages of avoiding the connecting ring from scratching the surface of the pier and protecting the integrity of the pier.
And (3) further limiting, before the step (7), arranging buckles at two sides of the arc-shaped connecting part of the arched girder, wherein the buckles are fixed on the steel rope.
The technical effect achieved by the scheme is as follows: (1) set up foretell reinforced structure through the below on bridge road surface, promoted the bearing capacity on bridge road surface, make the bridge after the reinforcement use safer. (2) The construction method can protect the initial structures of the pier and the bridge floor to the maximum extent, so that the stress structures of the pier and the bridge floor are not damaged. (3) When the bridge floor after being consolidated by the mode receives large moment, the arched girder and the arched trabecula can transmit the moment to the inverted V-shaped support frame, the support plate and the steel rope and finally transmit the moment to the bridge pier through the steel rope, so that the bridge floor is prevented from being damaged due to sudden increase of bearing capacity. (4) The arch bridge reinforcing structure and the construction method thereof have the advantages of low cost, short construction period, low operation difficulty of reinforcement and strong practicability. (5) When the bridge floor receives external force to cause the dislocation displacement on the horizontal direction, buffer spring can cushion and consume horizontal moment in this technical scheme, reduces and disperses the horizontal moment that the bridge floor received, makes the bridge floor be difficult for taking place the slippage phenomenon with the pier to further promote the reinforcement and the protection effect to the bridge.
Drawings
Fig. 1 is a perspective view of the present embodiment.
Fig. 2 is a schematic front view of the present embodiment.
Fig. 3 is an inverted perspective view of the present embodiment.
Fig. 4 is a schematic view of the installation at the end of the support plate of the present embodiment.
FIG. 5 is a schematic perspective view of the bridge reinforcing structure according to this embodiment
The drawings are numbered as follows:
the bridge deck comprises a bridge deck 1, piers 2, ring beams 3, steel ropes 4, arch girders 5, supporting plates 6, inverted V-shaped supporting frames 7, arch trabeculae 8, lifting grooves 9, buffer grooves 10 and buffer springs 11.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, a load transfer type bridge reinforcing structure comprises a bridge deck 1 and bridge piers 2, wherein fences are fixed on two sides above the bridge deck 1, ring beams 3 are installed on four adjacent bridge piers 2 below the bridge deck 1, in the embodiment, the ring beams 3 mainly comprise connecting rings, cross beams and longitudinal beams, the ends of the cross beams and the longitudinal beams are fixedly welded on the connecting rings, the top view of the ring beams 3 is similar to a rectangle, the connecting rings are sleeved on the bridge piers 2, in order to avoid the damage of the connecting rings on the surfaces of the bridge piers 2 caused by the fixing of the connecting rings on the bridge piers 2, an annular rubber layer is arranged between the contact surfaces of the connecting rings and the bridge piers 2, and in order to avoid the damage of the fixed connection between the connecting rings and the bridge piers 2 on the stress structure of the bridge piers 2, in the embodiment, the hoop is fixed on the bridge piers 2 by using hoops, and the hoops are positioned below the connecting rings, the positions of the ring beams 3 on the bridge piers 2 are limited, thereby achieving the purpose of fixing the ring beam 3 on the bridge pier 2.
As shown in fig. 2 to 5, through holes for allowing the steel cables 4 to pass through are formed in the longitudinal beams on both sides of the ring beam 3, the steel cables 4 are respectively disposed in the through holes at corresponding points of the longitudinal beams on both sides, both ends of the steel cables 4 are fixed on the outer sides of the longitudinal beams, in order to allow the steel cables 4 to better conduct force, a pre-tightening force is applied to the steel cables 4 when the ends of the steel cables 4 are fixed, in this embodiment, the steel cables 4 are fixed on the outer sides of the longitudinal beams in such a manner that a steel plate is disposed and fixed on the outer sides of the longitudinal beams, both ends of the steel cables 4 are respectively wound on the steel plate for 3 to 5 turns, in this embodiment, preferably, 4 turns are wound, and then the ends of the steel cables 4 are welded to the steel plate, thereby achieving the fixing purpose, preferably, buckles are disposed on both sides of the arc-shaped connection portion of the arch-shaped cross beams 5, the buckles are fixed on the steel cables 4, which is advantageous in that the arch-shaped cross beams 5 are prevented from moving left and right on the steel cables 4, the force transmission effect of the arched girder 5 is improved.
The lifting grooves 9 are symmetrically and uniformly arranged on the cross beams on the two sides of the ring beam 3, the supporting plates 6 are placed in the lifting grooves 9 symmetrical on the cross beams on the two sides, the end parts of the supporting plates 6 are positioned in the lifting grooves 9 on the two sides, the rest parts of the steel plates are placed on the steel ropes 4, the arched girders 5 are arranged above the steel ropes 4, the arc-shaped connecting parts are arranged at the two ends of the arched girders 5, the arc-shaped connecting parts of the arc-shaped connecting parts are bent, the arc-shaped connecting parts at the two ends of the arched girders 5 are sleeved on the two steel bars on the outermost side, the arched girders 5 are uniformly distributed along the direction of the cross beams, the supporting plates 6 are positioned between the adjacent arched girders 5, the protruding ends of the arched girders 5 are upwards installed and are in close contact with the bottom of the bridge floor 1, in order to avoid that the protruding ends of the arched girders 5 cause local damage to the bottom of the bridge floor 1, preferably, rubber blocks are arranged at the contact parts, the rubber block can play the role of shock absorption and skid resistance.
For the effect of further reinforcing strength conduction, be equipped with the support frame 7 of falling V-arrangement between two adjacent arch girders 5, the support frame 7 of falling V-arrangement has two channel-section steels welding to form, and the overhang of the support frame 7 of falling V-arrangement is installed up, and the overhang is located the middle part of arch girder 5 overhang, the middle part welded fastening of overhang and arch girder 5, and the both ends welded fastening of the support frame 7 of falling V-arrangement is on adjacent backup pad 6.
In order to better transmit the load borne by the bridge deck 1, the two adjacent inverted V-shaped support frames 7 are provided with the arched small beams 8, protruding ends of the arched small beams 8 are installed upwards and are in close contact with the bottom of the bridge deck 1, similarly, in order to avoid damage to the bridge deck 1, rubber blocks are arranged at contact positions of the arched small beams, the rubber blocks play a role in shock absorption and sliding prevention, the rubber blocks are fixed on the protruding ends of the arched small beams 8, and meanwhile, two ends of each arched small beam 8 are welded on the outer side walls of the adjacent inverted V-shaped support frames 7.
In order to avoid under the exogenic action, bridge floor 1 takes place great dislocation displacement for pier 2, cause the drop or the damage of bridge floor 1, buffer slot 10 has been seted up in the both sides of lift groove 9, be equipped with buffer spring 11 in the buffer slot 10, buffer spring 11's one end and the side fixed connection of backup pad 6, buffer spring 11's the other end and a side fixed connection of buffer slot 10, its beneficial part lies in, when bridge floor 1 takes place the level under earthquake or the exogenic action and rocks, backup pad 6 receives the ascending moment of horizontal direction when will under the effect of power conduction, set up this moment and cushion the horizontal moment that buffer spring 11 will receive in buffer slot 10, and support and take place the small distance displacement in the horizontal direction, borrow this internal energy that makes horizontal moment is consumed, make bridge floor 1's stability better.
Meanwhile, the invention also discloses a construction method of the bridge reinforcing mechanism, which comprises the following specific steps:
(1) the connecting rings are respectively sleeved on the four adjacent piers 2, and then the openings are welded;
(2) fixing a hoop below the connecting ring, and limiting the height of the ring beam 3 on the pier 2;
(3) through holes through which the steel ropes 4 penetrate are symmetrically formed in the longitudinal beams on the two sides in advance, and lifting grooves 9 are uniformly formed in the cross beams on the two sides in advance;
(4) welding the cross beam and the longitudinal beam on the connecting ring to form a rectangular ring beam 3;
(5) penetrating a steel rope 4 into through holes on longitudinal beams on two sides, fixing one end of the steel rope 4 on the outer side of a cross beam on one side, then pre-tightening the steel rope 4 at the other end by using a pre-tightening device, fixing the steel rope 4 on the outer side of the longitudinal beam on the other side, and then loosening the pre-tightening device;
(6) the arc-shaped connecting parts at the two ends of the arch girder 5 are sleeved on the two steel ropes 4 at the outermost side, and the protruding end of the arch girder 5 is tightly propped against the bottom of the bridge floor 1;
(7) placing a support plate 6 on the steel rope 4, wherein two ends of the support plate 6 are positioned in lifting grooves 9 of the symmetrically arranged beams;
(8) welding the top end of the inverted V-shaped support frame 7 below the middle part of the arched girder 5, and then welding the two ends of the inverted V-shaped support frame to the middle part of the support plate 6;
(9) and welding two ends of the arched small beams 8 on the side walls of the adjacent inverted V-shaped support frames 7, wherein the upper parts of the protruding ends of the arched small beams 8 are tightly contacted with the bridge deck 1.
In the construction method and the reinforcing structure, the ring beam 3 is made of channel steel with the thickness of 10-20mm, preferably 15mm, the diameter of the steel rope 4 is 8-12mm, preferably 10mm, and the arched girder 5 and the arched girder 8 are made of steel.
In summary, the present invention has the following technical effects: (1) the reinforcing structure is arranged below the bridge pavement, so that the bearing capacity of the bridge pavement is improved, and the reinforced bridge is safer to use. (2) The construction method can protect the initial structures of the pier 2 and the bridge floor 1 to the maximum extent, so that the stress structures of the pier 2 and the bridge floor 1 are not damaged. (3) When the bridge floor 1 reinforced in the above manner is subjected to a large moment, the arched girders 5 and the arched girders 8 transmit the moment to the inverted-V-shaped support frames 7, the support plates 6 and the steel ropes 4, and finally the moment is transmitted to the piers 2 through the steel ropes 4, so that the bridge floor 1 is prevented from being damaged due to sudden increase of bearing capacity. (4) The arch bridge reinforcing structure and the construction method thereof have the advantages of low cost, short construction period, low operation difficulty of reinforcement and strong practicability. (5) When bridge floor 1 receives external force to cause the displacement of the dislocation on the horizontal direction, among this technical scheme buffer tank 10 in buffer spring 11 can cushion and consume horizontal moment, reduce and disperse the horizontal moment that bridge floor 1 received, make bridge floor 1 be difficult for taking place the slippage phenomenon with pier 2 to further promote reinforcement and the protection effect to the bridge.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (10)
1. The utility model provides a load transmission type bridge reinforcing structure, includes bridge floor (1) and pier (2), its characterized in that, adjacent four be equipped with circle roof beam (3) on pier (2), circle roof beam (3) include crossbeam and longeron, the fixed steel cable (4) that evenly arranges in longeron upper portion, the top of steel cable (4) is equipped with arch girder (5) evenly arranged along the crossbeam direction, the both ends of arch girder (5) are equipped with arc connecting portion, arc connecting portion cup joints respectively on two steel cables (4) in the outside, the overhang of arch girder (5) and bridge floor (1) in close contact with, both sides the crossbeam evenly is equipped with lift groove (9) towards the central direction, lift groove (9) are located between two adjacent arch girders (5), both sides be equipped with backup pad (6) in the lift groove (9) that correspond on the crossbeam, the two ends of the supporting plate (6) are respectively located in lifting grooves (9) on two sides, the supporting plate (6) is located above the steel rope (4), the bottom surface of the supporting plate is in close contact with the steel rope (4), the supporting plate is adjacent to the steel rope, an inverted V-shaped supporting frame (7) is arranged in the middle of the supporting plate (6), and the top end of the inverted V-shaped supporting frame (7) is fixedly connected with the middle of the arch girder (5).
2. A load transfer type bridge reinforcing structure according to claim 1, wherein the side wall of the adjacent inverted V-shaped supporting frame (7) is provided with an arched small beam (8) fixedly connected with the side wall, and the protruding end of the arched small beam (8) faces upwards and is in close contact with the bottom surface of the bridge deck (1).
3. The load transfer type bridge reinforcing structure according to claim 1, wherein the contact portion between the cross beam and the longitudinal beam of the ring beam (3) is provided with a connecting ring, the end portions of the cross beam and the longitudinal beam are fixedly connected to the connecting ring, and the bridge pier (2) penetrates through the connecting ring.
4. The load transfer bridge reinforcement structure of claim 3, wherein the lower end of the connection ring is provided with a locking hoop, and the locking hoop limits the connection ring from moving up and down.
5. A load transferring bridge reinforcing structure according to claim 1, wherein the depth of said lifting groove (9) is two thirds of the height of the beam, and the lifting groove (9) opens downwardly from the upper surface of the beam.
6. The load transfer type bridge reinforcing structure according to claim 1, wherein buffer grooves (10) are formed in two sides of the lifting groove (9), buffer springs (11) are arranged in the buffer grooves (10), one ends of the buffer springs (11) are fixedly connected with the side faces of the supporting plates (6), and the other ends of the buffer springs (11) are fixedly connected with one side faces of the buffer grooves (10).
7. A load transferring bridge girder construction according to claim 1 wherein the arched girders (5) and arched girders (8) are provided with rubber blocks at the base of the bottom of the deck (1).
8. A construction method of a load transfer type bridge reinforcing structure is characterized by comprising the following steps:
(1) the connecting rings are respectively sleeved on four adjacent piers (2), and then the openings are welded;
(2) fixing the anchor ear below the connecting ring, and limiting the height of the ring beam (3) on the pier (2);
(3) longitudinal beams on two sides are symmetrically provided with through holes through which steel ropes (4) penetrate in advance, and cross beams on two sides are symmetrically and uniformly provided with lifting grooves (9) in advance;
(4) welding the cross beam and the longitudinal beam on the connecting ring to form a rectangular ring beam (3);
(5) penetrating steel ropes (4) into through holes in longitudinal beams on two sides, fixing one ends of the steel ropes (4) on the outer side of a cross beam on one side, then pre-tightening the steel ropes (4) at the other ends by using a pre-tightening device, fixing the steel ropes (4) on the outer side of the longitudinal beam on the other side, and then loosening the pre-tightening device;
(6) the arc-shaped connecting parts at the two ends of the arch girder (5) are sleeved on the two steel ropes (4) at the outermost side, and the protruding end of the arch girder (5) is tightly propped against the bottom of the bridge floor (1);
(7) the supporting plate (6) is placed on the steel rope (4), and two ends of the supporting plate (6) are positioned in lifting grooves (9) of the symmetrically arranged cross beams;
(8) welding the top end of the inverted V-shaped support frame (7) below the middle part of the arched girder (5), and then welding the two ends of the inverted V-shaped support frame to the middle part of the support plate (6);
(9) two ends of the arched small beams (8) are welded on the side walls of the adjacent inverted V-shaped support frames (7), and the upper parts of the protruding ends of the arched small beams (8) are tightly contacted with the bridge deck (1).
9. The construction method of a load transfer type bridge reinforcing structure according to claim 8, wherein an annular rubber layer is provided between the connection ring and the pier (2) before the step (1) is performed.
10. The method for constructing a load transfer type bridge girder reinforcing structure according to claim 8, wherein before the step (7), buckles are provided at both sides of the arc-shaped connection portion of the arch-shaped girder (5), and the buckles are fixed to the steel cables (4).
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| CN202011344840.1A CN112482251B (en) | 2020-11-26 | 2020-11-26 | Load transfer type bridge reinforcing structure and construction method thereof |
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| CN202011344840.1A CN112482251B (en) | 2020-11-26 | 2020-11-26 | Load transfer type bridge reinforcing structure and construction method thereof |
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| CN114855595B (en) * | 2022-05-24 | 2024-05-14 | 北京博知川科技服务有限公司 | Steel bridge structure with multiple buffering and damping mechanisms |
| CN115491967B (en) * | 2022-09-05 | 2023-11-24 | 南通路桥工程有限公司 | Upper bearing type steel pipe concrete arch bridge with damping device on main arch ring |
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| CN207567673U (en) * | 2017-12-04 | 2018-07-03 | 珠海大横琴股份有限公司 | Novel bridge construction main longitudinal grider hardened system |
| CN208279991U (en) * | 2018-04-04 | 2018-12-25 | 王雪 | A kind of lifting type road and bridge for sharing structure with stress |
| CN211571443U (en) * | 2020-01-06 | 2020-09-25 | 武汉加西亚建筑设计有限公司 | A reinforced structure for steel bridge roof beam |
| CN211973158U (en) * | 2020-03-09 | 2020-11-20 | 临沂大学 | Novel bridge reinforcing apparatus based on high-performance steel fiber concrete |
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