CN113481858A - Bridge box girder installation method - Google Patents
Bridge box girder installation method Download PDFInfo
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- CN113481858A CN113481858A CN202110784358.8A CN202110784358A CN113481858A CN 113481858 A CN113481858 A CN 113481858A CN 202110784358 A CN202110784358 A CN 202110784358A CN 113481858 A CN113481858 A CN 113481858A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009434 installation Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 16
- 238000007689 inspection Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 239000004575 stone Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000011800 void material Substances 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
The application relates to the technical field of bridge construction and discloses a bridge box girder installation method which comprises the following steps of construction preparation, inspection of a construction site, hoisting equipment and a box girder; mounting a support, namely mounting the support according to the support line position; and erecting the box girder, and lifting the box girder to the auxiliary positioning assembly by using a truck crane, so that the auxiliary positioning assembly adjusts the position of the box girder relative to the pier. This application is through setting up steps such as construction preparation, support installation and box girder erect, uses auxiliary positioning device to carry out the auxiliary operation to the staff when erectting the box girder, has reduced the box girder and is in unsettled state, and the great inconvenient staff of box girder inertia takes place the condition that the box girder goes on fixing a position, has reached the effect that makes things convenient for the staff to fix a position the box girder.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a bridge box girder installation method.
Background
With the rapid development of cities and the gradual improvement of economic levels, urban expressways and highways are increasingly popularized and developed. The construction is usually carried out in the form that the prefabricated box beam is erected on a pier in the construction of a large-span bridge.
In the correlation technique, when installing the box girder of initial section, the mode of truck crane hoist and mount is adopted usually, uses two truck cranes to mutually support and carries out the lifting to the box girder for the box girder is lifted to the top of pier, then transfers the box girder again, makes the box girder erect on the pier.
In view of the above-mentioned related technologies, the inventor believes that after the box girder is lifted to the top of the pier by using the above-mentioned method, a worker and a truck crane are required to cooperate to adjust and position the position of the box girder, and when the worker adjusts the position of the box girder, the box girder has a large inertia and is suspended on the top of the pier, so that there is a defect that the worker is inconvenient for the worker to adjust the box girder.
Disclosure of Invention
In order to adjust the box girder conveniently, the application provides a bridge box girder installation method.
The bridge box girder installation method provided by the application adopts the following technical scheme:
a bridge box girder installation method comprises the following steps:
s1, construction preparation, namely, inspection of a construction site, hoisting equipment and a box girder;
s2, mounting a support, namely mounting the support according to the position of a support line;
and S3, erecting the box girder, installing the auxiliary positioning device to one side of the pier, then using a truck crane to hoist the box girder to the top of the pier and erecting the box girder on the auxiliary positioning device, adjusting the position of the box girder by the auxiliary positioning device, and finally erecting the box girder on the pier.
By adopting the technical scheme, when the box girder is installed, a construction site is inspected, hoisting equipment is inspected and the box girder is inspected, so that accidents in the hoisting process are reduced, then the support is installed according to the position of the support line, then two auxiliary positioning devices are installed, so that the two auxiliary positioning devices are installed between two adjacent piers, one positioning auxiliary device is positioned at one side of one pier, then the box girder is lifted by using a truck crane, so that the box girder is lifted to the top of the pier, the box girder falls down to be fallen onto the auxiliary positioning devices, a worker adjusts the auxiliary positioning devices, the box girder is erected at the appointed position of the pier, the situation that the box girder is in a suspended state and is not convenient for the worker to adjust the box girder is reduced in the process, and then reach the effect that makes things convenient for the staff to adjust the case roof beam.
Optionally, when the truck crane in S3 hoists the box girder, the steel wire rope is used to hang at the bottom of the box girder by a pocket-supported beam, the steel wire rope is sleeved with a plurality of guide tubes, and the steel wire rope is in contact with the box girder through the guide tubes.
By adopting the technical scheme, when the truck crane is used for hoisting the box girder, one end of the steel wire rope bypasses the bottom of the box girder, so that the two ends of the steel wire rope are located at the top of the box girder, meanwhile, the guide pipe on the steel wire rope is in contact with the box girder, the two ends of the steel wire rope are connected with the lifting hook of the truck crane in a hanging manner, then the truck crane is operated to lift the box girder, after the box girder is in a suspension state, the box girder changes with the relative position of the steel wire rope under the action of self gravity, the steel wire rope slides relative to the guide pipe, and then the box girder is in a balance state.
Optionally, the guide pipe is arranged in a bent manner, and the concave side of the guide pipe faces the box girder.
Through adopting above-mentioned technical scheme, after the case roof beam was in unsettled state, wire rope took place relative slip with the stand pipe under the effect of case roof beam, made then the case roof beam be in balanced state, because the stand pipe is the crooked setting to the concave side of stand pipe sets up towards the case roof beam, so the stand pipe can lead wire rope's motion, reduces the restriction of the tip of stand pipe when moving wire rope.
Optionally, a rubber hose is fixedly connected to the guide pipe, and the guide pipe is in contact with the box girder through the rubber hose.
Through adopting above-mentioned technical scheme, after the bottom of case roof beam is walked around to wire rope's one end for rubber hose contradicts with the case roof beam, when reducing wire rope and exerting pulling force to the case roof beam on the one hand, wire rope damages the case roof beam, and on the other hand reduces wire rope and exerts pulling force to the case roof beam, and the case roof beam is to wire rope's damage.
Optionally, the auxiliary positioning device used in step S3 includes a support assembly disposed on the pier, a walking assembly disposed on the support assembly, and a lifting assembly disposed on the walking assembly.
Through adopting above-mentioned technical scheme, the truck crane is with box girder lifting to the top back of pier, transfer the box girder, then make the box girder fall on the lifting subassembly, the lifting subassembly makes the bottom of box girder and the top of pier have the clearance, then the staff promotes the box girder under the cooperation of truck crane, then make the box girder drive the lifting subassembly motion, the lifting subassembly drives the walking subassembly motion, walking subassembly and supporting component take place the relative slip, after the box girder motion is to the assigned position of pier, the lifting subassembly is operated, make the lifting subassembly transfer the box girder, the box girder erects on the pier, this in-process has reduced the influence when the box girder is in unsettled state self inertia when adjusting the box girder to the staff, and then reach the effect that makes things convenient for the staff to adjust the box girder.
Optionally, the support assembly includes a fixed plate disposed on the pier, a plurality of support columns fixedly connected to the fixed plate, and a support beam fixedly connected to tops of the plurality of support columns.
Through adopting above-mentioned technical scheme, when installing auxiliary positioning device, install supporting component earlier, install the bottom at the pier with the fixed plate for the pier seat of pier supports the fixed plate, support column and pier parallel arrangement, a supporting beam supplies walking assembly to walk on its upper portion, through setting up the fixed plate on the pier seat of pier bottom, can reduce the sunken condition of backup pad atress and take place, increase supporting component's stability, and then increase auxiliary positioning device during operation's stability.
Optionally, the walking assembly comprises a sliding beam and a plurality of rolling wheels rotatably connected to the sliding beam, and the rolling wheels are in rolling connection with the supporting beam.
Through adopting above-mentioned technical scheme, place the case roof beam back on the lifting subassembly, the staff promotes the case roof beam under the mating reaction of truck crane, makes then the case roof beam drive the sliding beam motion, and the sliding beam drives the wheel motion that rolls, and the wheel that rolls takes place relative roll with a supporting beam to reduce the frictional force between sliding beam and the supporting beam, and then reached the effect that makes things convenient for the staff to adjust the position of case roof beam.
Optionally, the lifting assembly comprises a plurality of hydraulic cylinders fixedly connected to the sliding beam.
Through adopting above-mentioned technical scheme, the truck crane transfers the box girder after lifting the box girder to the top of pier for the box girder falls on a plurality of pneumatic cylinders, then adjusts the position of box girder, adjusts the box girder to the assigned position after, drives the pneumatic cylinder, then makes the piston rod shrink of pneumatic cylinder, and the box girder falls on the pier, and then accomplishes the adjustment to the box girder position.
Optionally, it is a plurality of the top fixedly connected with tie-beam of pneumatic cylinder, it has the regulating plate to rotate on the tie-beam.
By adopting the technical scheme, after the truck crane lifts the box girder to the top of the pier, the truck crane lowers the box girder, so that the box girder falls on the adjusting plate, and then the position of the box girder is adjusted; when adjusting the case roof beam, the velocity of motion at case roof beam both ends is hardly accomplished unanimously, connects the regulating plate through rotating, when can reducing case roof beam both ends velocity of motion inconsistent, frictional force between case roof beam and the tie-beam to it takes place to reduce the condition that the case roof beam is damaged by the tie-beam, and then reaches the effect that reduces the construction degree of difficulty.
Optionally, the supporting beam is provided with a sliding cavity corresponding to the plurality of rolling wheels, and the plurality of rolling wheels roll in the sliding cavity, and each rolling wheel is connected with the cavity bottom of the sliding cavity in a rolling manner.
By adopting the technical scheme, when the sliding beam moves, the sliding wheel drives the rolling wheel to move, the rolling wheel rolls in the sliding cavity, and then the sliding cavity guides the rolling direction of the rolling wheel, so that the stability of the sliding beam during movement is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the steps of construction preparation, support installation, box girder erection and the like, when the box girder is erected, an auxiliary positioning device is used for carrying out auxiliary operation on workers, the situation that the box girder is in a suspended state, the box girder has large inertia and is inconvenient for the workers to position the box girder is reduced, and the effect of facilitating the workers to position the box girder is achieved;
2. the steel wire rope is provided with the guide pipe and is abutted against the box girder through the guide pipe, after the box girder is lifted by the truck crane, the box girder is in a suspended state, the steel wire rope slides relative to the guide pipe under the action of the gravity of the box girder, and finally the box girder is in a balanced state, so that the effect that the box girder can automatically reach the balanced state is achieved;
3. through set up rubber hose on the stand pipe, the stand pipe passes through rubber hose and contradicts with the case roof beam, can reduce wire rope to the damage of case roof beam on the one hand, and on the other hand reduces the damage of case roof beam to wire rope.
Drawings
FIG. 1 is a schematic structural view of a connection relationship between a steel wire rope and a box girder according to an embodiment of the present application;
FIG. 2 is a schematic structural view illustrating a connection relationship between an auxiliary positioning device and a box girder according to an embodiment of the present application;
FIG. 3 is an exploded view of an auxiliary positioning device and a box girder according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a walking assembly in an auxiliary positioning device according to an embodiment of the present application.
Description of reference numerals: 100. a bridge pier; 110. a support base cushion stone; 111. a support; 120. a box girder; 200. a wire rope; 210. a guide tube; 211. a rubber hose; 300. a support assembly; 310. a fixing plate; 320. a support pillar; 330. a support beam; 331. a sliding cavity; 400. a walking assembly; 410. a sliding beam; 411. an accommodating chamber; 420. a rolling wheel; 500. a lifting assembly; 510. a hydraulic cylinder; 511. a connecting beam; 512. an adjusting plate; 600. a connecting assembly; 610. a first connecting rod; 620. a second connecting rod; 621. a nut; 630. a locking lever.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a bridge box girder installation method.
Referring to fig. 1 and 2, a bridge box girder installation method includes the steps of: s1, construction preparation, namely, treating the foundation of the construction site to ensure that the bearing capacity of the foundation meets the requirement; and backfilling the stone slag to the original ground in a backfilling area, and backfilling layer by layer and compacting. And re-measuring the span of the pier 100 and the height of the pier top according to the plane control network, checking the elevation and the plane position of the support base stone 110, and drawing an erection installation axis and an end line so as to accurately position the box girder 120. Before installation, various indexes of appearance, strength, end face size, flatness, mutual contact surfaces and the like of the box girder 120 are checked and checked, and if errors exceed the standard requirements, the box girder cannot be lifted for installation. The truck crane and the steel wire rope 200 for hoisting are comprehensively checked, and can be put into use after being qualified. Before the support 111 is installed, dirt on the pier top is removed, so that the elevation of the pier top surface meets the design requirement.
S2, mounting the support 111, horizontally mounting the support 111 on the support cushion 110, ensuring the surface flatness of the support 111 within a specified range, and avoiding the situations of bias, void and uneven support of the support 111. The location of the support 111 at the point of attachment of the substructure on the bridge is important for transferring upper vehicle loads and structural loads to the intermediate ties of the substructure, the degree of reliability of which directly affects the safety and durability of the bridge structure.
And S3, erecting the box girder 120, and lifting the box girder 120 by using a steel wire rope 200 and adopting a joist bottom hanging method. The box girder 120 is hoisted by two points, and the hoisting points are respectively arranged at the positions 0.8-1.0m away from the girder end. And installing two auxiliary positioning devices, wherein two auxiliary positioning devices are installed between two adjacent piers 100, one auxiliary positioning device is arranged corresponding to one pier 100, and one auxiliary positioning device is positioned on one side of one pier 100. Two truck cranes are brought in and one truck crane lifts one end of the box girder 120.
The truck crane lifts the box girder 120 using the wire rope 200, lifts the box girder 120 to the top of the pier 100, and then lowers the box girder 120 and drops the box girder 120 on the auxiliary locating assembly. The position of the box girder 120 relative to the pier 100 is adjusted, so that the bottom of the box girder 120 is prevented from being suspended, and the situation that workers are inconvenient to position due to the fact that the bottom of the box girder 120 is suspended and the inertia force is large is reduced. After the position of the box girder 120 is adjusted, the auxiliary positioning assembly is operated, and finally the box girder 120 is erected on the pier 100, and the box girder 120 abuts against the abutment 111.
In the prior art, when the steel wire rope 200 is used for lifting the box girder 120 by adopting a method of lifting the bottom of the box girder, the relative position of the steel wire rope 200 and the box girder 120 needs to be adjusted according to the gravity center of the box girder 120, and then the lifting balance of the box girder 120 is achieved, and the method is complex in operation.
In order to achieve the effect of balancing the box girder 120 during hoisting, in the steel wire rope 200 used in step S3, a plurality of guide pipes 210 are sleeved on the steel wire rope 200, each guide pipe 210 is arranged in a bent manner, and the concave side of each guide pipe 210 faces the box girder 120. Rubber hose 211 is fixedly sleeved on each guide pipe 210, a corner of each guide pipe 210 corresponding to the connection of steel wire rope 200 and box girder 120 is arranged, and rubber hose 211 is abutted to box girder 120.
After one end of the steel wire rope 200 bypasses the bottom of the box girder 120, the steel wire rope 200 is folded back, so that both ends of the steel wire rope 200 are positioned at the top of the box girder 120, and then both ends of the steel wire rope 200 are hung with a hook of a truck crane. The truck crane exerts ascending pulling force to wire rope 200, wire rope 200 lifts case roof beam 120, case roof beam 120 is in unsettled state back, stand pipe 210 drives case roof beam 120 and wire rope 200 and takes place relative slip under the effect of case roof beam 120 self gravity, thereby make case roof beam 120 be in hoist and mount balanced state, for the self-regulation of case roof beam 120 in this process, need not the staff and operate wire rope 200 and can realize the hoist and mount balance of case roof beam 120, and then realized being convenient for case roof beam 120 and reached the balanced effect of hoist and mount.
Referring to fig. 2 and 3, in order to facilitate the worker to adjust the position of the box girder 120, the auxiliary positioning device used in step S3 includes a support assembly 300, a walking assembly 400, and a lifting assembly 500, wherein the box girder 120 is placed on the lifting assembly 500, the lifting assembly 500 is disposed on the walking assembly 400, and the walking assembly 400 is disposed on the support assembly 300. The lifting assembly 500 lifts and lowers the box girder 120 to realize the contact and separation of the box girder 120 and the upper support 111 of the pier 100, the walking assembly 400 walks on the support assembly 300 to realize the position adjustment of the box girder 120, and the support assembly 300 is used for supporting the walking assembly 400 to increase the stability of the walking assembly 400.
In order to increase the supporting stability of the supporting assembly 300 to the walking assembly 400, the supporting assembly 300 includes a fixing plate 310, a plurality of supporting columns 320 and supporting beams 330, the plurality of supporting columns 320 are vertically and fixedly connected to the fixing plate 310, the plurality of supporting columns 320 are uniformly spaced along the length direction of the fixing plate 310, the supporting beams 330 are vertically and fixedly connected to the plurality of supporting columns 320, and the supporting beams 330 are located at the tops of the plurality of supporting columns 320. When installing supporting component 300, fixed plate 310 is placed on pier seat of pier 100 for pier seat of pier 100 supports fixed plate 310, reduces the sunken condition emergence behind the fixed plate 310 atress, and then increases the stability when supporting component 300 supports walking component 400.
Referring to fig. 3 and 4, in order to facilitate the adjustment of the box girder 120 by the worker, the walking assembly 400 includes a sliding girder 410 and a plurality of rolling wheels 420, the plurality of rolling wheels 420 are uniformly disposed at both sides of the sliding girder 410, and each rolling wheel 420 is rotatably coupled to the sliding girder 410. Two sliding cavities 331 are formed in the supporting beam 330 corresponding to the rolling wheels 420 on two sides of the sliding beam 410, one sliding cavity 331 is arranged corresponding to the rolling wheels 420 on one side of the sliding beam 410, each rolling wheel 420 is placed in the sliding cavity 331, and when the sliding beam 410 moves along the supporting beam 330, each rolling wheel 420 rolls in the sliding cavity 331, the rolling wheels 420 roll relative to the bottom of the sliding cavity 331, so that the friction force between the sliding beam 410 and the supporting beam 330 is reduced, the force required when the box beam 120 is adjusted is reduced, and finally the effect of facilitating adjustment of a worker on the box beam 120 is achieved.
In order to facilitate the worker to erect the box girder 120 on the abutment 111 of the pier 100, the lifting assembly 500 includes a plurality of hydraulic cylinders 510, and the plurality of hydraulic cylinders 510 are sequentially spaced apart in the length direction of the sliding beam 410. The cylinder body of each hydraulic cylinder 510 is fixedly connected to the sliding beam 410. When the box girder 120 is placed on the hydraulic cylinders 510, the plurality of hydraulic cylinders 510 are operated simultaneously, so that the height of the tops of the piston rods of the plurality of hydraulic cylinders 510 relative to the horizontal plane is higher than that of the tops of the supports 111 on the bridge pier 100 relative to the horizontal plane, and the situation that the contact between the box girder 120 and the supports 111 on the bridge pier 100 influences the adjustment of a worker on the box girder 120 is reduced; after the position of the box girder 120 is adjusted, the plurality of hydraulic cylinders 510 are simultaneously operated, and the piston rods of the plurality of hydraulic cylinders 510 are contracted, so that the box girder 120 is brought into contact with the abutment 111 on the pier 100 and is erected on the abutment 111 on the pier 100, and finally, an effect of facilitating the erection of the box girder 120 of which the position is adjusted on the abutment 111 on the pier 100 is achieved.
Stability when supporting the case roof beam 120 in order to increase a plurality of pneumatic cylinders 510, offer the chamber 411 that holds a plurality of pneumatic cylinders 510 on the slip roof beam 410, every pneumatic cylinder 510 all places in holding chamber 411 to the bottom of every pneumatic cylinder 510 cylinder body all with hold chamber 411's chamber bottom fixed connection, the week side of every pneumatic cylinder 510 cylinder body all contradicts with the chamber wall that holds chamber 411. The top fixedly connected with tie-beam 511 of a plurality of pneumatic cylinder 510 piston rods, tie-beam 511 links together the piston rod of a plurality of pneumatic cylinder 510 to reduce the condition that two pneumatic cylinders 510 of case roof beam 120 during operation take place relative motion and take place, and then stability when a plurality of pneumatic cylinders 510 support case roof beam 120.
After the truck crane places the box girder 120 on the connection girders 511, the box girder 120 may have a different contact position with the two connection girders 511, and when the box girder 120 is adjusted, there may be a difference in the moving speed of both ends of the box girder 120, which may cause the box girder 120 to be deviated with respect to the top of the pier 100, and at this time, the box girder 120 needs to be corrected.
In order to facilitate the correction of the box girder 120 by workers, the box girder 120 is in contact with the connection beam 511 through an adjusting plate 512, the adjusting plate 512 is positioned on the top of the connection beam 511, the adjusting plate 512 is rotatably connected with the connection beam 511, and the rotation axis of the adjusting plate 512 and the connection beam 511 is positioned at the central point of the adjusting plate 512. After the truck crane lifts the box girder 120, the truck crane transfers the box girder 120 to the adjusting plate 512, then the box girder 120 is adjusted, when the position of the box girder 120 relative to the top of the pier 100 needs to be adjusted, one end of the box girder 120 is pushed, the one end of the box girder 120 pushed drives the adjusting plate 512 to move, the adjusting plate 512 and the connecting beam 511 rotate relatively, and therefore correction of the box girder 120 is achieved, and the effect that a worker can correct the box girder 120 is achieved.
In order to increase the stability of the auxiliary positioning device in supporting the box girder 120, the plurality of support columns 320 are provided with the connection assembly 600, and the connection assembly 600 is used for connecting the plurality of support columns 320 with the pier 100. The connecting assembly 600 includes a first connecting rod 610, a second connecting rod 620 and two locking rods 630, the first connecting rod 610 is fixedly connected with one side of the plurality of support columns 320 deviating from the pier 100, one locking rod 630 is vertically and fixedly connected with one end of the first connecting rod 610, the other locking rod 630 is vertically and fixedly connected with the other end of the first connecting rod 610, and the second connecting rod 620 is arranged on one side of the pier 100 deviating from the plurality of support columns 320. Both ends of the second connecting rod 620 are provided with connecting holes corresponding to the locking rods 630 for the locking rods 630 to pass through, and one ends of the two locking rods 630, which are far away from the first connecting rod 610, pass through the corresponding connecting holes. Equal threaded connection has nut 621 on every locking pole 630, and nut 621 contradicts and supports tightly with one side that second connecting rod 620 deviates from pier 100 to realize being connected of many support columns 320 and pier 100, and then reach and increase auxiliary positioning device and support stable effect to case roof beam 120.
The implementation principle of the installation method of the bridge box girder in the embodiment of the application is as follows: when the box girder 120 is installed, the span of the pier 100 and the height of the pier top are retested, the elevation and the plane position of the support base cushion stone 110 are checked, and the appearance, the strength, the end face size, the flatness and the mutual contact face of the box girder 120 are checked. And taking out the dirt on the pier top of the pier 100 to ensure that the elevation of the pier top surface meets the design requirement.
The support 111 is horizontally installed on the support stepping stone 110. And then, installing the auxiliary positioning device, placing the fixing plate 310 on the pier seat of the pier 100, enabling the supporting column 320 to be in a parallel state with the pier 100, enabling the supporting beam 330 to be located at the position of the top of the pier 100, and enabling the height of the adjusting plate 512 relative to the horizontal plane to be higher than the position of the top of the pier 100 relative to the horizontal plane. Then install second connecting rod 620 for two locking poles 630 all pass the connecting hole on the second connecting rod 620, install nut 621 on the locking pole 630 at last, make nut 621 and second connecting rod 620 deviate from one side of pier 100 and support tightly, and then accomplish auxiliary positioning device's installation.
And then, the steel wire ropes 200 are placed at the two ends of the box girder 120, the steel wire ropes 200 are lifted by using a truck crane, the box girder 120 is lifted to the top of the pier 100, and then the box girder 120 is lowered, so that the box girder 120 falls on the adjusting plate 512. Then the box girder 120 is pushed, the box girder 120 drives the adjusting plate 512 to move, the adjusting plate 512 drives the sliding beam 410 to move, and the rolling wheels 420 and the supporting beam 330 roll relatively. When the box girder 120 moves to a designated position, the hydraulic cylinder 510 is operated, the hydraulic cylinder 510 drives the connection girder 511, and then the piston rod of the hydraulic cylinder 510 drives the connection girder 511 to move towards the pier seat of the pier 100, the box girder 120 abuts against the support 111, the hydraulic cylinder 510 is continuously operated, and the adjusting plate 512 is separated from the bottom of the box girder 120. The installation of the plurality of box beams 120 is then cyclically completed by moving the sliding beam 410 out of the bottom of the box beam 120 and placing the next box beam 120 on the adjustment plate 512.
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 (10)
1. A bridge box girder installation method is characterized in that: the method comprises the following steps:
s1, construction preparation, namely, inspection of a construction site, hoisting equipment and a box girder (120);
s2, mounting a support (111), and mounting the support (111) according to the support line position;
s3, erecting the box girder (120), installing an auxiliary positioning device on one side of the pier (100), then using a truck crane to hoist the box girder (120) to the top of the pier (100) and erecting the box girder on the auxiliary positioning device, adjusting the position of the box girder (120) by the auxiliary positioning device, and finally erecting the box girder (120) on the pier (100).
2. The method for installing the bridge box girder according to claim 1, wherein: when the truck crane in the S3 hoists the box girder (120), a steel wire rope (200) is used for hoisting by a bottom-hanging method of a joist, a plurality of guide pipes (210) are sleeved on the steel wire rope (200), and the steel wire rope (200) is in contact with the box girder (120) through the guide pipes (210).
3. The method for installing the bridge box girder according to claim 2, wherein: the guide pipe (210) is arranged in a bent manner, and the concave side of the guide pipe (210) faces the box girder (120).
4. The method for installing the bridge box girder according to claim 2, wherein: the guide pipe (210) is fixedly connected with a rubber hose (211), and the guide pipe (210) is in contact with the box girder (120) through the rubber hose (211).
5. The method for installing the bridge box girder according to claim 1, wherein: the auxiliary positioning device used in step S3 includes a support assembly (300) disposed on the pier (100), a walking assembly (400) disposed on the support assembly (300), and a lifting assembly (500) disposed on the walking assembly (400).
6. The method for installing the bridge box girder according to claim 5, wherein: the support assembly (300) comprises a fixing plate (310) arranged on the pier (100), a plurality of support columns (320) fixedly connected to the fixing plate (310), and a support beam (330) fixedly connected to the tops of the support columns (320).
7. The method for installing the bridge box girder according to claim 6, wherein: the walking assembly (400) comprises a sliding beam (410) and a plurality of rolling wheels (420) rotatably connected to the sliding beam (410), wherein the rolling wheels (420) are in rolling connection with the supporting beam (330).
8. The method for installing the bridge box girder according to claim 7, wherein: the lift assembly (500) includes a plurality of hydraulic cylinders (510) fixedly attached to a sliding beam (410).
9. The method for installing the bridge box girder according to claim 8, wherein: a plurality of top fixedly connected with tie-beam (511) of pneumatic cylinder (510), it is connected with regulating plate (512) to rotate on tie-beam (511).
10. The method for installing the bridge box girder according to claim 7, wherein: the supporting beam (330) is provided with a sliding cavity (331) corresponding to the rolling wheels (420) for the rolling wheels (420) to roll in, and each rolling wheel (420) is in rolling connection with the cavity bottom of the sliding cavity (331).
Priority Applications (1)
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