CN117107645A - Construction method for setting continuous steel box girder with curve section for bridge girder erection machine - Google Patents
Construction method for setting continuous steel box girder with curve section for bridge girder erection machine Download PDFInfo
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- CN117107645A CN117107645A CN202311003599.XA CN202311003599A CN117107645A CN 117107645 A CN117107645 A CN 117107645A CN 202311003599 A CN202311003599 A CN 202311003599A CN 117107645 A CN117107645 A CN 117107645A
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- erection machine
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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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
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a construction method for setting a curve section continuous steel box girder for a bridge girder erection machine, which comprises the steps of firstly arranging a front supporting leg transverse moving track girder; fixing a supporting upright post on the top of the cover beam, and mounting the transverse moving track beam on the supporting upright post by using a bolt; then erecting a middle beam to a design position and welding to finish transverse connection to form a whole; then removing the supporting upright posts with conflicting positions, shoveling the pad on the top of the middle beam, and erecting the side beam to the temporary support position; the bridge girder erection machine moves forward, the transverse track beam moves forward along with the supporting legs, and meanwhile, the corresponding support structure conversion is completed; and finally, erecting all steel beams by the bridge girder erection machine, withdrawing, and welding to form the whole side beams of the continuous steel box girder, and transversely moving to the design position. The invention can enhance the universality of the bridge girder erection machine, has the effects of improving the construction efficiency, shortening the construction period, reducing the construction cost and the like for the erection of the continuous steel box girder with the curve section.
Description
Technical Field
The invention relates to a construction method for a bridge girder erection machine to set a continuous steel box girder with a curve section, and belongs to the technical field of bridge girder erection construction.
Background
Along with the rapid development of the transportation industry, the bridge engineering construction in China is rapidly developed in recent years, and a plurality of new challenges are also generated. In bridge superstructure construction, continuous steel box girders are widely used due to light weight, high strength and attractive appearance, and particularly, the new line curve sections of existing lines and various buildings are most widely used across rivers, lakes and seas.
At present, for a continuous steel box girder with a curved section, a construction process of simply supporting first and continuously welding hole by hole is generally adopted, the construction is carried out after the sections are divided first, and two common erection methods are adopted:
an integral hoisting method is mainly characterized in that a steel box girder segment is integrally transported to a bridge position to be erected, and then a hoisting machine is used for hoisting a hanger to be set in place; the other is a bridge girder erection method, which is mainly characterized in that the bridge girder erection machine is assembled at the bridge position, and the crane lifting beam body moves forward along the main girder of the bridge girder erection machine to finish erection.
The former requires wide construction site and large working space, and the latter is difficult to construct due to insufficient space of the top of the bent cap when the steel box girder is installed in the bent section, and both the former and the latter have limitations.
Disclosure of Invention
The invention provides a construction method for setting a continuous steel box girder with a curve section for a bridge girder erection machine, which aims to overcome the defects in the prior construction technology and can meet the requirements of safety, economy and universality in the construction process of setting the continuous steel box girder with the curve section by using a bridge girder erection machine in most of the projects at present.
The technical solution of the invention is as follows:
a construction method for a bridge girder erection machine to set a continuous steel box girder with a curve section comprises the following steps:
step 1: arranging a front supporting leg transverse moving track beam: arranging a front support leg transverse moving track beam and a plurality of support columns at the lower part of the front support leg transverse moving track beam on the top of a cover beam, wherein the support columns are connected with the front support leg transverse moving track beam through bolts;
step 2: the bridge girder erection machine is in place, and a middle girder is erected: dropping the front supporting leg of the bridge girder erection machine onto the transverse moving track beam of the front supporting leg, erecting the middle beam to a design position, and welding transverse rigid connection to form a whole;
step 3: dismantling the supporting upright post with conflicting positions and erecting the boundary beam: pre-dismantling a supporting column which is in conflict with the position of the side beam, making a shoveling pad at the position of the middle beam top to the transverse moving track beam, erecting the side beam to the position of the temporary support, and finishing the erection of the first hole beam;
step 4: the bridge girder erection machine advances, the track beam is replaced, and the front supporting leg is changed into the middle supporting leg: firstly, removing connection between a transverse moving track beam of a front supporting leg of a bridge girder erection machine and supporting columns, removing the supporting columns in the middle, reserving one column at the outermost ends of the two sides, then moving the front supporting leg of the bridge girder erection machine to the next cover beam along with the transverse moving track beam, moving the middle supporting leg of the bridge girder erection machine forward along with the transverse moving track beam, and falling to the position of the original front supporting leg track beam together, wherein the middle supporting leg track beam is supported by a beam top shoveling pad and fixedly connected with the supporting columns at the two sides, and the rear supporting leg track beam of the bridge girder erection machine and the shoveling pad structure of the rear supporting leg track beam are identical with the corresponding structure of the supporting legs of the bridge girder erection machine;
step 5: erecting all steel beams, dismantling a track beam supporting structure, and transversely moving side beams to finish construction: and the bridge girder erection machine advances the girder erection hole by hole until all erection is completed, the bridge girder erection machine is withdrawn, the side girders at two sides welded into continuous girders are transversely moved to the designed positions, and the erection construction of the continuous steel box girders with curved sections is completed.
In the erection process of the continuous steel box girder with the curve section, in order to solve the conflict between the steel box girder and the front supporting leg structure of the bridge girder erection machine, the supporting upright posts are adopted to erect the transverse moving track girder of the front supporting leg of the bridge girder erection machine, and enough height for the steel box girder to pass through is reserved below the track girder of the front supporting leg.
In the process of erecting the side beams, in order to solve structural conflict, the supporting upright post of the transverse moving track beam of the front supporting leg of the bridge girder erection machine is changed into a rigid shoveling pad of the top of the steel box girder.
In the advancing process of the bridge girder erection machine, the supporting leg transverse track beam of the bridge girder erection machine moves forward along with the supporting leg of the bridge girder erection machine, so as to meet the supporting force requirement of the supporting leg in the bridge girder erection machine, and the main supporting structure of the track beam is changed from a steel pipe supporting column to a beam top rigid shoveling pad which is densely distributed.
The steel box girder side beams are firstly erected to the temporary support positions, are completely erected and welded into a whole, and then are integrally transversely moved to the design positions.
The invention has the beneficial effects that:
1. the method can improve the utilization efficiency of the space on the top of the bent cap, effectively solve the problem that the girder body collides with the transverse moving track when the bridge girder erection machine is provided with the steel box girder with the curve section, and enhance the universality of the bridge girder erection machine.
2. The method reduces the operation risk of setting the curved section steel box girder boundary beam of the bridge girder erection machine, solves the problem of insufficient transverse operation space of the capping girder top, and greatly improves the safety and quality of production construction.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
FIG. 2 is a schematic diagram of the initial structural arrangement of the transverse track beam of the front supporting leg of the bridge girder erection machine.
FIG. 3 is a schematic view of the cross-sectional layout of the single aperture frame beam of the present invention when completed.
FIG. 4 is a schematic diagram of the cross-sectional layout of the forward-moved landing leg of the bridge girder erection machine.
In the drawing, a cover beam 1, a front supporting leg transverse moving track beam 2, a supporting column 3-10, a front supporting leg 11 of a bridge girder erection machine, a middle beam 12-15, a shoveling pad 16-17, a rigid connection 18, a side beam 19-20, a temporary support position 21-22, a middle supporting leg 23 of the bridge girder erection machine, a middle supporting leg track beam 24 and a shoveling pad 25.
Detailed Description
The technical scheme of the invention is further explained below with reference to the accompanying drawings.
Referring to fig. 1-4, a construction method for setting a curve section continuous steel box girder for a bridge girder erection machine comprises the following steps:
step 1: arranging a front supporting leg transverse moving track beam: arranging a front support leg transverse moving track beam 2 and a lower support upright post 3-10 on the top of the cover beam 1, wherein the support upright posts 3-10 are connected with the front support leg transverse moving track beam 2 through bolts;
step 2: the bridge girder erection machine is in place, and a middle girder is erected: dropping a front supporting leg 11 of the bridge girder erection machine onto a front supporting leg transverse moving track beam 2, erecting a middle beam 12-15 to a design position, and welding a transverse rigid connection 18 to form a whole;
step 3: dismantling the supporting upright post with conflicting positions and erecting the boundary beam: the support columns 4 and 9 which collide with the side beams are removed in advance, the side beams 19 and 20 are erected to temporary support positions 21 and 22, shoveling pads 16 and 17 are arranged at the positions of the middle beams 12 and 15, which are opposite to the transverse moving track beam 11, and the first hole beam is erected;
step 4: the bridge girder erection machine advances, the track beam is replaced, and the front supporting leg is changed into the middle supporting leg: firstly, removing the connection between the front support leg transverse moving track beam 2 and the support columns 3, 10 and 5-8, removing the middle support column 5-8, then carrying the transverse moving track beam 2 by the front support leg 11 of the bridge girder erection machine to the next cover beam 1, carrying the transverse moving track beam 24 by the support leg 23 in the bridge girder erection machine to move forward, and landing to the position of the original front support leg track beam 2, wherein the middle support leg track beam 24 is supported by a beam top shoveling pad 25 and fixedly connected with the support columns 3 and 10 at two sides, and the structure of the rear support leg track beam of the bridge girder erection machine and the shoveling pad structure of the support leg 23 in the bridge girder erection machine are the same;
step 5: erecting all steel beams, dismantling a track beam supporting structure, and transversely moving side beams to finish construction: and the bridge girder erection machine advances the girder erection hole by hole until all erection is completed, the bridge girder erection machine is withdrawn, the side girders 19 and 20 welded into continuous girders are transversely moved to the design positions, and the erection construction of the continuous steel box girders with curve segments is completed.
In the erection process of the continuous steel box girder with the curve section, in order to solve structural conflict between the steel box girder and the front supporting leg 11 of the bridge girder erection machine, the supporting upright posts 3-10 are adopted to erect the transverse moving track girder 2 of the front supporting leg of the bridge girder erection machine, and enough height for the steel box girder to pass through is reserved below the track girder 2 of the front supporting leg.
In the process of erecting the side beams 19 and 20, in order to solve structural conflict, the supporting columns 4 and 9 of the transverse moving track beams 2 of the front supporting legs of the bridge girder erection machine are changed into rigid shoveling pads 16 and 17 on top of the steel box girders 12 and 15.
In the advancing process of the bridge girder erection machine, the supporting legs of the bridge girder erection machine transversely move the track beams 2 and 24 forwards along with the supporting legs 11 and 23 of the bridge girder erection machine, so as to adapt to the supporting force requirement of the supporting legs 23 in the bridge girder erection machine, and the main supporting structure of the track beams is changed from steel pipe supporting columns 5-8 to beam top rigid shoveling pads 25 which are densely distributed.
The steel box girder side beams 19, 20 are firstly erected to temporary support positions 21, 22, are wholly erected and welded into a whole, and then are wholly transversely moved to a design position.
Claims (5)
1. The construction method for the bridge girder erection machine to set the continuous steel box girder with the curve section is characterized by comprising the following steps:
step 1: arranging a front supporting leg transverse moving track beam: arranging the front support leg transverse moving rail beam and a support upright post at the lower part of the front support leg transverse moving rail beam on the top of the cover beam, wherein the support upright post is connected with the front support leg transverse moving rail beam through bolts;
step 2: the bridge girder erection machine is in place, and a middle girder is erected: dropping the front supporting leg of the bridge girder erection machine onto the transverse moving track beam of the front supporting leg, erecting the middle beam to a design position, and welding transverse rigid connection to form a whole;
step 3: dismantling the supporting upright post with conflicting positions and erecting the boundary beam: pre-dismantling a supporting column which is in conflict with the position of the side beam, making a shoveling pad at the position of the middle beam top to the transverse moving track beam, erecting the side beam to the position of the temporary support, and finishing the erection of the first hole beam;
step 4: the bridge girder erection machine advances, the track beam is replaced, and the front supporting leg is changed into the middle supporting leg: firstly, removing connection between a transverse moving track beam of a front supporting leg of a bridge girder erection machine and supporting columns, removing the supporting columns in the middle, reserving one column at the outermost ends of the two sides, then moving the front supporting leg of the bridge girder erection machine to the next cover beam along with the transverse moving track beam, moving the middle supporting leg of the bridge girder erection machine forward along with the transverse moving track beam, and falling to the position of the original front supporting leg track beam together, wherein the middle supporting leg track beam is supported by a beam top shoveling pad and fixedly connected with the supporting columns at the two sides, and the rear supporting leg track beam of the bridge girder erection machine and the shoveling pad structure of the rear supporting leg track beam are identical with the corresponding structure of the supporting legs of the bridge girder erection machine;
step 5: erecting all steel beams, dismantling a track beam supporting structure, and transversely moving side beams to finish construction: and the bridge girder erection machine advances the girder erection hole by hole until all erection is completed, the bridge girder erection machine is withdrawn, the side girders at two sides welded into continuous girders are transversely moved to the designed positions, and the erection construction of the continuous steel box girders with curved sections is completed.
2. The construction method for erecting a curved section steel box girder according to claim 1, wherein: in the erection process of the continuous steel box girder of the curve section, in order to solve the structural conflict between the steel box girder and the front supporting leg of the bridge girder erection machine, the supporting upright post is adopted to erect the transverse moving track girder of the front supporting leg of the bridge girder erection machine, and enough height for the steel box girder to pass through is reserved below the track girder of the front supporting leg.
3. The construction method for erecting a curved section steel box girder according to claim 1, wherein: in the process of erecting the side beams, in order to solve structural conflict, the supporting upright post of the transverse moving track beam of the front supporting leg of the bridge girder erection machine is changed into a rigid shoveling pad of the top of the steel box girder.
4. The construction method for erecting a curved section steel box girder according to claim 1, wherein: in the advancing process of the bridge girder erection machine, the supporting leg transverse track beam of the bridge girder erection machine moves forward along with the supporting leg of the bridge girder erection machine, so as to meet the supporting force requirement of the supporting leg in the bridge girder erection machine, and the main supporting structure of the track beam is changed from a steel pipe supporting column to a beam top rigid shoveling pad which is densely distributed.
5. The construction method for erecting a curved section steel box girder according to claim 1, wherein: the steel box girder side beams are firstly erected to the temporary support positions, are completely erected and welded into a whole, and then are integrally transversely moved to the design positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311003599.XA CN117107645A (en) | 2023-08-10 | 2023-08-10 | Construction method for setting continuous steel box girder with curve section for bridge girder erection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311003599.XA CN117107645A (en) | 2023-08-10 | 2023-08-10 | Construction method for setting continuous steel box girder with curve section for bridge girder erection machine |
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| Publication Number | Publication Date |
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| CN117107645A true CN117107645A (en) | 2023-11-24 |
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| CN202311003599.XA Pending CN117107645A (en) | 2023-08-10 | 2023-08-10 | Construction method for setting continuous steel box girder with curve section for bridge girder erection machine |
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| CN (1) | CN117107645A (en) |
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- 2023-08-10 CN CN202311003599.XA patent/CN117107645A/en active Pending
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