CN111350121A - Modular assembling method for steel box girder bridge - Google Patents
Modular assembling method for steel box girder bridge Download PDFInfo
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- CN111350121A CN111350121A CN202010191541.2A CN202010191541A CN111350121A CN 111350121 A CN111350121 A CN 111350121A CN 202010191541 A CN202010191541 A CN 202010191541A CN 111350121 A CN111350121 A CN 111350121A
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention relates to the technical field of steel structure bridge construction, in particular to a modular assembling method of a steel box girder bridge.
Description
Technical Field
The invention relates to the technical field of steel structure bridge construction, in particular to a modular assembling method of a steel box girder bridge.
Background
With the rapid development of Chinese traffic construction, more and more steel structure bridges appear, the steel box girder bridge is a common structural form of a large-span bridge, the steel box girder bridge transversely consists of cantilever arms at two sides, an anchor box and a multi-chamber structure in the middle, and the cantilever arms, the anchor box and the chambers in the middle are connected together through full welding. The large steel box girder bridge is limited by the overall dimension of road transportation, and needs to be transversely divided into sections for transportation, and the sections are integrally assembled for installation after being transported to a construction site. The traditional steel box girder bridge assembly method is that the steel box girder bridge is assembled from a central line to two sides in the transverse direction symmetrically, and then the steel box girder bridge is welded from the central line to the two sides in the transverse direction symmetrically, so that the transverse welding deformation of the steel box girder bridge is reduced; the above method has the following disadvantages: firstly, when assembling to the bilateral symmetry by the central line on horizontal, the central line produces the accumulation and assembles the deviation to both sides, and both sides anchor case is far away from the central line position, and accumulation position deviation is also great, but anchor case department has support or cable to support the weight of whole bridge, and anchor case positional deviation is too big to cause the bearing system of bridge not conform to the designing requirement, and then influences the structural safety of bridge. Secondly, the steel box girder bridge is formed by sections which are heavy, and the transverse symmetrical hoisting from the center line to the two sides causes the large crane to move back and forth to hoist the steel box girder, so that the working time of the crane is reduced, safety accidents are easy to happen, the construction progress is seriously delayed, and the construction cost is increased, which are undesirable for the technical personnel in the field.
Disclosure of Invention
Aiming at the existing problems, the invention discloses a modular assembling method of a steel box girder bridge, wherein the steel box girder bridge comprises a bridge main body positioned in the middle and cantilever arms positioned on two sides of the bridge main body, and the method comprises the following steps:
step S1, prefabricating all box girder segments forming the bridge main body, wherein all the box girder segments forming the bridge main body comprise a left side chamber, a left anchor box, a left inner chamber, a folding chamber, a right inner chamber, a right anchor box and a right side chamber, and the folding chamber has a cutting allowance;
step S2, pre-assembling all box girder sections forming the bridge main body to form a pre-assembled bridge, disassembling the pre-assembled bridge after the pre-assembled bridge is checked to be qualified, and transporting each box girder section after disassembly to a construction site;
step S3, arranging a pre-assembled jig frame at the installation position of a construction site;
step S4, marking positioning points on the lower surfaces of the bottoms of all box girder segments forming the bridge main body, and arranging supporting points corresponding to the positioning points on the pre-assembled jig frame;
step S5, after the left side chamber, the left anchor box and the left inner chamber are hoisted to the pre-assembled jig frame in sequence according to the positioning points and the supporting points, the left side chamber, the left anchor box and the left inner chamber are welded and fixed together, and after the right side chamber, the right anchor box and the right inner chamber are hoisted to the pre-assembled jig frame in sequence according to the positioning points and the supporting points, the right side chamber, the right anchor box and the right inner chamber are welded and fixed together;
step S6, measuring the distance between the left inner chamber and the right inner chamber, and cutting the folding chamber according to the distance so that the width of the folding chamber is equal to the distance;
step S7, hoisting the cut closure chamber onto the pre-assembled jig frame and placing the closure chamber between the left inner chamber and the right inner chamber, and welding and fixing the cut closure chamber with the left inner chamber and the right inner chamber respectively to complete the assembly of the bridge main body;
and step S8, mounting the cantilever arms on two sides of the assembled bridge main body.
In the modular assembling method of the steel box girder bridge, in the step S1, the cutting allowance is 50-100 mm.
In the above method for assembling a steel box girder bridge in a modular manner, in step S3, after the pre-assembled jig frame is set at the installation position of the construction site, the method further includes a step of pre-pressing the pre-assembled jig frame.
The modular assembling method of the steel box girder bridge comprises the following steps of S4: and marking positioning points on the lower surfaces of the bottoms of all box girder segments forming the bridge main body, acquiring the spatial coordinate value of each positioning point, and setting a supporting point on the pre-assembled jig frame according to the spatial coordinate value of each positioning point.
The modular assembling method of the steel box girder bridge comprises the following steps of S5:
step S51, hoisting the left side chamber, the left anchor box and the left inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the left side chamber, the left anchor box and the left inner chamber together;
step S52, measuring the external space coordinates of the left room, the left anchor box and the left inner room by using a total station, judging whether the measurement result is qualified, and if the measurement result is qualified, welding and fixing the left room, the left anchor box and the left inner room together;
step S53, hoisting the right side chamber, the right anchor box and the right inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the right side chamber, the right anchor box and the right inner chamber together;
and step S54, measuring the external space coordinates of the right room, the right anchor box and the right inner room by using a total station, judging whether the measurement result is qualified, and welding and fixing the right room, the right anchor box and the right inner room together if the measurement result is qualified.
In the above-mentioned method for assembling steel box girder bridge in a modular manner, in step S52, if the measurement result is not qualified, the positions of the left side room, the left anchor box and the left inner room are adjusted until the measurement result obtained by measuring the external space coordinates of the left side room, the left anchor box and the left inner room by the total station is qualified, and then the left side room, the left anchor box and the left inner room are welded and fixed together
In the above modular assembling method for a steel box girder bridge, in step S52, if the measurement result is not qualified, the positions of the right room, the right anchor box and the right inner chamber are adjusted until the measurement result obtained by measuring the external space coordinates of the right room, the right anchor box and the right inner chamber by the total station is qualified, and then the right room, the right anchor box and the right inner chamber are welded and fixed together
The modular assembling method of the steel box girder bridge comprises the following steps of S5:
step S51', hoisting the right side chamber, the right anchor box and the right inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the right side chamber, the right anchor box and the right inner chamber together;
step S52', measuring the external space coordinates of the right room, the right anchor box and the right inner room by using a total station, judging whether the measurement result is qualified, and welding and fixing the right room, the right anchor box and the right inner room together if the measurement result is qualified;
step S53', hoisting the left side chamber, the left anchor box and the left inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the left side chamber, the left anchor box and the left inner chamber together;
and step S54', measuring the external space coordinates of the left room, the left anchor box and the left inner room by using a total station, judging whether the measurement result is qualified, and if the measurement result is qualified, welding and fixing the left room, the left anchor box and the left inner room together.
The invention has the following advantages or beneficial effects:
the invention discloses a modularized assembling method of a steel box girder bridge, which is characterized in that all box girder segments of a bridge main body of the steel box girder bridge are prefabricated in a factory, cutting allowance of a middle closure chamber is reserved, after all the box girder segments are assembled in the factory and checked to be qualified, the box girder bridge is transversely assembled in a construction site according to the mode of assembling from side chambers to middle chambers, closing at a central line and finally hoisting a cantilever arm, so that the accurate space position of an anchor box can be ensured, the displacement of a crane is reduced, the construction difficulty is reduced, the construction safety is ensured, and the construction efficiency and the construction quality are improved.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a flow chart of a modular assembly method of a steel box girder bridge according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the left chamber being hoisted to the pre-assembled bed-jig in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the left chamber, the left anchor box, the left inner chamber and the right chamber after being assembled in the embodiment of the present invention;
FIG. 4 is a schematic structural view of the assembled folding chamber according to the embodiment of the present invention;
FIG. 5 is a schematic structural view of a steel box girder bridge after the modular assembly in the embodiment of the present invention is completed;
in the figure: the device comprises a pre-assembled jig frame 1, a left chamber 2, a left anchor box 3, a left inner chamber 4, a right chamber 5, a right anchor box 6, a right inner chamber 7, a folding chamber 8, a right cantilever arm 9 and a left cantilever arm 10.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and specific examples, but the present invention is not limited thereto.
As shown in fig. 1 to 5, the invention discloses a modular assembling method of a steel box girder bridge, the steel box girder bridge comprises a bridge main body positioned in the middle and cantilever arms (a left cantilever arm 10 and a right cantilever arm 9 respectively) positioned at two sides of the bridge main body, and the method specifically comprises the following steps:
step S1, prefabricating all box girder segments forming the bridge main body, specifically, all box girder segments forming the bridge main body comprise a left side chamber 2, a left anchor box 3, a left inner chamber 4, a folding chamber 8 (namely, an inner chamber positioned on a central line), a right inner chamber 7, a right anchor box 6 and a right side chamber 5, and the folding chamber 8 is provided with cutting allowance in the width direction (the cutting allowance of 50-100 mm is reserved on a top plate, a bottom plate, a transverse partition plate and the like of the folding chamber 8 in the transverse direction to be used as a field installation deviation adjustment allowance) to be used as a subsequent field installation deviation adjustment amount.
In a preferred embodiment of the present invention, the cutting margin is 50 to 100mm (50mm, 60mm, 75mm, 100mm, or the like).
Specifically, in step S1, all box girder segments that form the bridge body are prefabricated according to the road, the transportation limit size of the bridge, and the bearing capacity (i.e., the steel box girder bridge is divided into box girder segments in a modularized manner in the transverse direction at the factory), wherein an inner chamber located at the transverse center line of the steel box girder bridge is used as the final folding chamber 8.
And step S2, pre-assembling all box girder sections forming the bridge main body in a factory to form a pre-assembled bridge, disassembling the pre-assembled bridge after the pre-assembled bridge is checked to be qualified, and transporting each box girder section after being disassembled to a construction site.
Step S3, arranging a pre-assembled jig frame 1 at the installation position of a construction site according to the size of an assembled steel box girder bridge, enabling the top elevation of the pre-assembled jig frame 1 to be consistent with the bottom plate elevation of an assembled bridge main body, and then pre-pressing the pre-assembled jig frame 1 to ensure that the pre-assembled jig frame 1 has enough bearing capacity to support each box girder segment.
Step S4, marking positioning points on the lower surfaces of the bottoms of all box girder segments forming the bridge main body, acquiring the spatial coordinate value of each positioning point through three-dimensional software, and setting supporting points corresponding to each positioning point on the pre-assembled jig frame 1 according to the spatial coordinate value; when hoisting each box girder segment, the positioning point of the bottom plate of each box girder segment should coincide with the corresponding supporting point on the pre-assembled jig frame 1.
Step S5, after the left side chamber 2, the left anchor box 3 and the left inner chamber 4 are hoisted to the pre-assembled jig frame 1 in sequence according to the positioning points and the supporting points, the left side chamber 2, the left anchor box 3 and the left inner chamber 4 are welded and fixed together, and after the right side chamber 5, the right anchor box 6 and the right inner chamber 7 are hoisted to the pre-assembled jig frame 1 in sequence according to the positioning points and the supporting points, the right side chamber 5, the right anchor box 6 and the right inner chamber 7 are welded and fixed together, so that the structure shown in fig. 4 is obtained.
In a preferred embodiment of the present invention, the step S5 specifically includes:
step S51, sequentially hoisting the left side chamber 2, the left anchor box 3 and the left inner chamber 4 which are positioned on the left side of the transverse center line of the steel box girder to the pre-assembled jig frame 1 by using a crane according to the positioning points and the supporting points, and temporarily fixing the left side chamber 2, the left anchor box 3 and the left inner chamber 4 together; specifically, firstly, the left chamber 2 is hoisted on the pre-assembled jig 1 by a crane and positioned, as shown in the structure of fig. 2, then the left anchor box 3 is hoisted and temporarily fixed with the left chamber 2, then the left inner chamber 4 is horizontally and sequentially hoisted towards the central line direction, and the left inner chamber 4 and the left anchor box 3 are temporarily fixed together.
Step S52, measuring external space coordinates of the temporarily positioned left room 2, left anchor box 3 and left inner room 4 by using a total station, judging whether the measurement result is qualified (namely judging whether the actually measured external space coordinate data meets the design requirement), and if the measurement result is qualified, welding and fixing the left room 2, the left anchor box 3 and the left inner room 4 together; if the measurement result is not qualified, the positions of the left room 2, the left anchor box 3 and the left inner chamber 4 are adjusted until the measurement result obtained by measuring the external space coordinates of the left room 2, the left anchor box 3 and the left inner chamber 4 by the total station is qualified, and then the left room 2, the left anchor box 3 and the left inner chamber 4 are welded and fixed together.
Step S53, sequentially hoisting the right side chamber 5, the right anchor box 6 and the right inner chamber 7 which are positioned on the right side of the transverse center line of the steel box girder to the pre-assembled jig frame 1 by using a crane according to the positioning points and the supporting points, and temporarily fixing the right side chamber 5, the right anchor box 6 and the right inner chamber 7 together; specifically, the right chamber 5 is firstly hoisted on the pre-assembled jig 1 by a crane and positioned, as shown in the structure of fig. 3, then the right anchor box 6 is hoisted and temporarily fixed with the right chamber 5, then the right inner chamber 7 is horizontally and sequentially hoisted towards the center line direction, and the right inner chamber 7 and the right anchor box 6 are temporarily fixed together.
Step S54, measuring the external space coordinates of the right room 5, the right anchor box 6 and the right inner room 7 by using a total station, judging whether the measurement result is qualified (namely judging whether the actually measured external space coordinate data meets the design requirement), and if the measurement result is qualified, welding and fixing the right room 5, the right anchor box 6 and the right inner room 7 together; if the measurement result is not qualified, the positions of the right room 5, the right anchor box 6 and the right inner chamber 7 are adjusted until the measurement result obtained by measuring the external space coordinates of the right room 5, the right anchor box 6 and the right inner chamber 7 by the total station is qualified, and then the right room 5, the right anchor box 6 and the right inner chamber 7 are welded and fixed together.
Of course, in another embodiment of the present invention, in the step S5, the right chamber 5, the right anchor box 6 and the right inner chamber 7 may be hoisted and welded first, and then the left chamber 2, the left anchor box 3 and the left inner chamber 4 may be hoisted and welded, which does not affect the object of the present invention, and specifically, the step S5 includes:
and step S51', hoisting the right side chamber 5, the right anchor box 6 and the right inner chamber 7 to the pre-assembled jig frame 1 in sequence by using a crane according to the positioning points and the supporting points, and temporarily fixing the right side chamber 5, the right anchor box 6 and the right inner chamber 7 together.
And step S52', measuring the external space coordinates of the right room 5, the right anchor box 6 and the right inner room 7 by using a total station, judging whether the measurement result is qualified, and welding and fixing the right room 5, the right anchor box 6 and the right inner room 7 together if the measurement result is qualified.
And step S53', hoisting the left side chamber 2, the left anchor box 3 and the left inner chamber 4 to the pre-assembled jig frame 1 in sequence by using a crane according to the positioning points and the supporting points, and temporarily fixing the left side chamber 2, the left anchor box 3 and the left inner chamber 4 together.
And step S54', measuring the external space coordinates of the left room 2, the left anchor box 3 and the left inner room 4 by using a total station, judging whether the measurement result is qualified, and welding and fixing the left room 2, the left anchor box 3 and the left inner room 4 together if the measurement result is qualified.
Step S6, before the last steel box girder closing chamber 8 is hoisted to the middle line closing position, the distance between the left inner chamber 4 and the right inner chamber 7 (i.e. the distance between the left inner chamber 4 and the right inner chamber 7 of the assembled steel box girder) is measured, and the transverse width of the closing chamber 8 is cut and trimmed on the ground according to the distance, so that the width and the distance of the closing chamber 8 are equal.
And step S7, hoisting the cut closure chamber 8 to the pre-assembled jig frame 1 by using a crane, placing the pre-assembled jig frame at a position between the left inner chamber 4 and the right inner chamber 7, and adjusting the smooth transition of butt welding seams among a top plate, a bottom plate and a transverse partition plate between the cut closure chamber 8 and the left inner chamber 4 and the right inner chamber 7 so as to weld and fix the cut closure chamber 8 with the left inner chamber 4 and the right inner chamber 7, thereby completing the assembly of the bridge main body.
And step S8, respectively hoisting the left cantilever arm 10 and the right cantilever arm 9 of the steel box girder on two sides of the assembled bridge main body by using a crane, and installing to complete the assembling construction of the steel box girder bridge, wherein the structure is shown in figure 5.
Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described herein in detail. Such variations do not affect the essence of the present invention and are not described herein.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. A modular assembling method of a steel box girder bridge, wherein the steel box girder bridge comprises a bridge main body positioned in the middle and cantilever arms positioned on two sides of the bridge main body, is characterized by comprising the following steps:
step S1, prefabricating all box girder segments forming the bridge main body, wherein all the box girder segments forming the bridge main body comprise a left side chamber, a left anchor box, a left inner chamber, a folding chamber, a right inner chamber, a right anchor box and a right side chamber, and the folding chamber has a cutting allowance;
step S2, pre-assembling all box girder sections forming the bridge main body to form a pre-assembled bridge, disassembling the pre-assembled bridge after the pre-assembled bridge is checked to be qualified, and transporting each box girder section after disassembly to a construction site;
step S3, arranging a pre-assembled jig frame at the installation position of a construction site;
step S4, marking positioning points on the lower surfaces of the bottoms of all box girder segments forming the bridge main body, and arranging supporting points corresponding to the positioning points on the pre-assembled jig frame;
step S5, after the left side chamber, the left anchor box and the left inner chamber are hoisted to the pre-assembled jig frame in sequence according to the positioning points and the supporting points, the left side chamber, the left anchor box and the left inner chamber are welded and fixed together, and after the right side chamber, the right anchor box and the right inner chamber are hoisted to the pre-assembled jig frame in sequence according to the positioning points and the supporting points, the right side chamber, the right anchor box and the right inner chamber are welded and fixed together;
step S6, measuring the distance between the left inner chamber and the right inner chamber, and cutting the folding chamber according to the distance so that the width of the folding chamber is equal to the distance;
step S7, hoisting the cut closure chamber onto the pre-assembled jig frame and placing the closure chamber between the left inner chamber and the right inner chamber, and welding and fixing the cut closure chamber with the left inner chamber and the right inner chamber respectively to complete the assembly of the bridge main body;
and step S8, mounting the cantilever arms on two sides of the assembled bridge main body.
2. The modular assembling method of a steel box girder bridge according to claim 1, wherein in the step S1, the cutting margin is 50 to 100 mm.
3. The modular construction method of a steel box girder bridge according to claim 1, wherein the step S3, after the pre-assembled jig frame is installed at an installation site of a construction site, further comprises the step of pre-pressing the pre-assembled jig frame.
4. The modular assembling method of the steel box girder bridge as recited in claim 1, wherein the step S4 is specifically: and marking positioning points on the lower surfaces of the bottoms of all box girder segments forming the bridge main body, acquiring the spatial coordinate value of each positioning point, and setting a supporting point on the pre-assembled jig frame according to the spatial coordinate value of each positioning point.
5. The modular assembling method of a steel box girder bridge according to claim 1, wherein the step S5 specifically includes:
step S51, hoisting the left side chamber, the left anchor box and the left inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the left side chamber, the left anchor box and the left inner chamber together;
step S52, measuring the external space coordinates of the left room, the left anchor box and the left inner room by using a total station, judging whether the measurement result is qualified, and if the measurement result is qualified, welding and fixing the left room, the left anchor box and the left inner room together;
step S53, hoisting the right side chamber, the right anchor box and the right inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the right side chamber, the right anchor box and the right inner chamber together;
and step S54, measuring the external space coordinates of the right room, the right anchor box and the right inner room by using a total station, judging whether the measurement result is qualified, and welding and fixing the right room, the right anchor box and the right inner room together if the measurement result is qualified.
6. The modular construction method of a steel box girder bridge according to claim 5, wherein in step S52, if the measurement result is not qualified, the positions of the left side room, the left anchor box and the left inner room are adjusted until the total station measures the external space coordinates of the left side room, the left anchor box and the left inner room, and then the left side room, the left anchor box and the left inner room are welded and fixed together.
7. The modular construction method of a steel box girder bridge according to claim 5, wherein in step S52, if the measurement result is not qualified, the positions of the right room, the right anchor box and the right inner chamber are adjusted until the total station measures the external space coordinates of the right room, the right anchor box and the right inner chamber, and then the right room, the right anchor box and the right inner chamber are welded and fixed together.
8. The modular assembling method of a steel box girder bridge according to claim 1, wherein the step S5 specifically includes:
step S51', hoisting the right side chamber, the right anchor box and the right inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the right side chamber, the right anchor box and the right inner chamber together;
step S52', measuring the external space coordinates of the right room, the right anchor box and the right inner room by using a total station, judging whether the measurement result is qualified, and welding and fixing the right room, the right anchor box and the right inner room together if the measurement result is qualified;
step S53', hoisting the left side chamber, the left anchor box and the left inner chamber to the pre-assembled jig frame in sequence by using a crane according to the positioning point and the supporting point, and temporarily fixing the left side chamber, the left anchor box and the left inner chamber together;
and step S54', measuring the external space coordinates of the left room, the left anchor box and the left inner room by using a total station, judging whether the measurement result is qualified, and if the measurement result is qualified, welding and fixing the left room, the left anchor box and the left inner room together.
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| CN112112077A (en) * | 2020-09-15 | 2020-12-22 | 中交第三航务工程局有限公司 | Construction method of steel box girder |
| CN112252187A (en) * | 2020-09-02 | 2021-01-22 | 中铁五局集团第四工程有限责任公司 | In-situ scattered assembling and hoisting method for steel box girder |
| CN113073569A (en) * | 2021-04-11 | 2021-07-06 | 四川一宇钢结构工程有限公司 | Method for correcting integral torsional deformation of steel box girder bridge section |
| CN115008053A (en) * | 2022-06-07 | 2022-09-06 | 中国五冶集团有限公司 | Machining and manufacturing method for curved variable-section steel box girder |
| CN115162182A (en) * | 2022-07-20 | 2022-10-11 | 中国五冶集团有限公司 | Cantilever type steel box girder high-precision cable hoisting construction method |
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| CN113073569B (en) * | 2021-04-11 | 2022-09-02 | 四川一宇钢结构工程有限公司 | Method for correcting integral torsional deformation of steel box girder bridge section |
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| CN115008053B (en) * | 2022-06-07 | 2024-04-05 | 中国五冶集团有限公司 | Method for processing and manufacturing curve variable-section steel box girder |
| CN115162182A (en) * | 2022-07-20 | 2022-10-11 | 中国五冶集团有限公司 | Cantilever type steel box girder high-precision cable hoisting construction method |
| CN115162182B (en) * | 2022-07-20 | 2023-09-15 | 中国五冶集团有限公司 | Cantilever type steel box girder high-precision cable hoisting construction method |
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