CN116623550A - Double-box continuous steel box girder construction method - Google Patents
Double-box continuous steel box girder construction method Download PDFInfo
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- CN116623550A CN116623550A CN202310639755.5A CN202310639755A CN116623550A CN 116623550 A CN116623550 A CN 116623550A CN 202310639755 A CN202310639755 A CN 202310639755A CN 116623550 A CN116623550 A CN 116623550A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000010276 construction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000009193 crawling Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007306 turnover Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- 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
-
- 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 discloses a double-box continuous steel box girder construction method, which comprises two groups of assembled temporary supports and a scissor support for connecting the two groups of assembled temporary supports; each group of the assembled temporary supports at least comprises a platform beam, two support foundations and four assembled stand columns; the two groups of assembled temporary supports are mutually parallel and level in the transverse direction, the two groups of scissors supports are arranged in parallel in the longitudinal direction, and each group of scissors supports connects two assembled upright posts which are close to one side in the transverse direction in the two groups of assembled temporary supports; the double-box continuous steel box girder is installed by erecting an assembled door-type temporary support at the sectional position of the continuous steel box girder, so that the construction quality of sectional installation of the continuous steel box girder is ensured; compared with the traditional method, the construction method has the advantages that the influence of construction on traffic of the passing roads is small, the construction is performed on a crossed operation platform by high-altitude operation of workers, the safety is good, the construction efficiency is high, the cost of the measures spent by the construction method is low, the construction method can be repeatedly used in a turnover mode, and the popularization value is realized.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a double-box continuous steel box girder construction method.
Background
With the increase of medium and large cities, the traffic jam phenomenon in the cities is increasingly more. Under the conditions that the buildings are dense and the streets are difficult to widen, the viaduct has the advantages of avoiding crossing other line planes, saving land, evacuating traffic density, improving transportation efficiency and the like, and is applied to the reconstruction and expansion roads of the areas with heavy traffic in the dense areas of the buildings. According to the classification of construction materials of viaducts, the viaducts are divided into reinforced concrete structures and steel box girder structures, and when the viaduct is constructed across an intersection, continuous steel box girder structures are often adopted to reduce the influence on traffic of the passed roads, and the steel box girder structures can be prefabricated in factories and are constructed quickly on site. The construction of the overhead continuous steel box girder structure mostly adopts sectional hoisting high-place assembly construction, and bridge supports are needed in the construction. However, when the construction of the overhead bridge is carried out on the passed road, the use of the bridge support in the prior art can influence the traffic of the passed road, the road occupation construction and even the road closing construction can not ensure the normal passing of the road at the construction section.
Therefore, in order to solve the above problems, a construction method of a double-box continuous steel box girder is needed, which can avoid the influence of construction of the continuous steel box girder of the viaduct with heavy traffic on the road.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects in the prior art and provide a double-box continuous steel box girder construction method which can avoid the influence of construction of a continuous steel box girder of a viaduct with heavy traffic on a road.
The double-box continuous steel box girder construction method comprises two groups of assembled temporary supports and a scissor support for connecting the two groups of assembled temporary supports;
each group of the assembled temporary supports at least comprises a platform beam, two support foundations and four assembled stand columns, wherein the two support foundations are oppositely arranged in the transverse direction of the same horizontal reference, each two assembled stand columns are oppositely arranged on the same support foundation in the longitudinal direction of the same horizontal reference, the platform beam at least comprises two transverse beams parallel to the transverse direction and a plurality of connecting beams for connecting the two transverse beams, and each transverse beam is supported by the two transversely opposite assembled stand columns;
the two groups of assembled temporary supports are mutually parallel and level in the transverse direction, the two groups of the scissors supports are arranged in parallel in the longitudinal direction, each group of the scissors supports connects two assembled upright posts on one side, which are mutually close in the transverse direction, of the two groups of assembled temporary supports, the central nodes of the two groups of the scissors supports are connected through a reinforcing beam, and the reinforcing beam is parallel to the longitudinal direction;
the method also comprises the following construction steps:
s1, designing an assembled double-door type temporary support according to the single-width of a road and the installation height of a steel box girder;
s2, setting up a temporary support at the sectional position of the steel box girder;
s3, carrying out a pre-pressing test on the built temporary support, if the pre-pressing test of the temporary support is qualified, carrying out the next step, and if the pre-pressing test of the temporary support is unqualified, carrying out the step S1 again;
s4, mounting the continuous steel box girder on the temporary support in a segmented manner;
s5, single-frame integral unloading of the continuous steel box girder and dismantling of the temporary support.
Further, two adjacent along longitudinal the assembled stand passes through the pergola and connects, the pergola is including corresponding respectively fixing two first staple bolt and the second staple bolt on the assembled stand, the pergola still includes the last tie-beam that connects first staple bolt top and second staple bolt top, the lower tie-beam that connects first staple bolt bottom and second staple bolt bottom and the middle tie-beam of a plurality of that connect last tie-beam and lower tie-beam.
Further, the upper connecting beam and the lower connecting beam are parallel to the longitudinal direction, and the space surrounded by the upper connecting beam, the lower connecting beam and the two assembled upright posts connected by the upper connecting beam and the lower connecting beam is divided into a plurality of component force areas by the plurality of middle connecting beams.
Further, the assembled stand column comprises a plurality of stand column bodies with flange joints at the top and the bottom, the plurality of stand column bodies are assembled and connected to form a whole through the flange joints, the stand column bodies at the bottom of the assembled stand column are assembled on the corresponding bracket bases through the flange joints, and the stand column bodies at the top of the assembled stand column are assembled on the corresponding cross beams through the flange joints;
the flower stand is a plurality of groups which are in one-to-one correspondence with the number of the upright post bodies in each assembled upright post, and each group of flower stand is used for connecting upright post bodies which are longitudinally opposite in the two groups of assembled upright posts.
Further, the assembled temporary support further comprises two side diagonal beams which are arranged on the same side in the longitudinal direction of the platform beam, and the two side diagonal beams are respectively and correspondingly supported by two assembled upright posts which are positioned on the same side in the longitudinal direction of the platform beam along the transverse direction.
Further, the fabricated temporary support also includes an inner bracing beam connected between the cross beam and the fabricated upright connected to the cross beam.
Further, the assembled temporary support further comprises an operation platform arranged at the bottom of the platform beam in the height direction, and the assembled temporary support further comprises a ladder stand for providing a channel from a set position to the operation platform.
Further, the operation platform is assembled at the bottom of the platform beam through a plurality of vertical beams parallel to the height direction, and the crawling ladder is arranged at one side of the assembled temporary support, which is far away from the scissor support along the transverse direction.
Further, a plurality of the connecting beams are parallel to the longitudinal direction.
Further, the assembled stand column is provided with a support lug for connecting the scissors support.
The beneficial effects of the invention are as follows: according to the double-box continuous steel box girder construction method disclosed by the invention, the double-box continuous steel box girders are installed by erecting the assembled door-type temporary support at the sectional position of the continuous steel box girders, so that the construction quality of sectional installation of the continuous steel box girders is ensured. The assembled type double-door type temporary support in the construction method is simple in structure, stable and reliable, the defects that the traditional viaduct steel box girder is required to occupy the road for construction and even the road is closed can be effectively overcome, and the span of the temporary support is designed according to the width of the road width, so that the whole-lane traffic of the commuted road after the support is erected can be ensured, and the temporary support has little influence on traffic; meanwhile, the construction method has the advantages that the workers work at high positions to construct on the crossed operation platform, the safety is good, the construction efficiency is high, the cost of measures spent by the construction method is low, the construction method can be repeatedly used, and certain popularization value is achieved.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure of the present invention;
FIG. 2 is a front view of the planar structure of the present invention;
FIG. 3 is a side view of a planar structure of the present invention;
FIG. 4 is an enlarged view of part A of FIG. 1;
FIG. 5 is a schematic view of the flower stand of FIG. 1;
FIG. 6 is a schematic illustration of a standard segment structure of a column;
FIG. 7 is a schematic view of a structure in which the length of the adjustable section of the upright is less than 500 mm;
FIG. 8 is a schematic view of a structure with a length of the column adjustable section of 500mm or more.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, as shown in the drawing, the transverse direction is the extending direction of the cross beam 21, the longitudinal direction is the extending direction of the connecting beam 22, and the height direction is the extending direction of the fabricated upright 1, which is not described herein again; the double-box continuous steel box girder construction method in the embodiment comprises two groups of assembled temporary supports and a scissor support 9 for connecting the two groups of assembled temporary supports;
each group of the assembled temporary supports at least comprises a platform beam 2, two support foundations 3 and four assembled upright posts 1, wherein the two support foundations 3 are oppositely arranged in the transverse direction of the same horizontal reference, each two assembled upright posts 1 are oppositely arranged on the same support foundation 3 in the longitudinal direction of the same horizontal reference, the platform beam 2 at least comprises two transverse beams 21 parallel to the transverse direction and a plurality of connecting beams 22 for connecting the two transverse beams 21, the connecting beams 22 are parallel to the longitudinal direction, and the platform beam 2 further comprises backing plates 24 correspondingly arranged at the top and the bottom of a connecting node between the connecting beams 22 and the transverse beams 21 and stiffening plates 23 arranged at the side surface of the connecting node between the connecting beams 22 and the transverse beams 21; further, the structural strength of the platform beam 2 is improved, and the supporting reliability of the viaduct steel box girder to be supported is improved;
each beam 21 is supported by two assembly uprights 1 opposite in transverse direction; that is, as shown in the figure, four assembly type upright posts 1 form a support for the rectangular platform beam 2, and two assembly type upright posts 1 which are arranged along the longitudinal direction are correspondingly arranged on each bracket foundation 3, so that the stability of the structure is further improved, and a door-shaped channel for vehicles and the like to pass through is formed;
the two groups of assembled temporary supports are mutually parallel and level in the transverse direction, the two groups of the scissors supports 9 are arranged in parallel in the longitudinal direction, each group of the scissors supports 9 are used for connecting the two groups of two assembled upright posts 1 which are close to one side in the transverse direction in the assembled temporary supports, the central nodes of the two groups of the scissors supports 9 are connected through reinforcing beams, and the reinforcing beams are parallel to the longitudinal direction.
The method also comprises the following construction steps:
s1, designing an assembled double-door type temporary support according to the single-width of a road and the installation height of a steel box girder; in step S1, the span of each group of gate-type supports is set according to the width of the passed unilateral road, and the distance between two groups of gate-type supports is set according to the width of the central dividing strip; the height is determined according to the installation elevation of the overhead bridge steel box girder;
s2, setting up a temporary support at the sectional position of the steel box girder; in the step S2, temporary supports are built, a temporary support foundation 3 is constructed, the support foundation 3 is a strip foundation, the assembled upright posts 1 and the support foundation 3 are connected through embedded anchors and flanges, the support foundation 3 is 600mm away from the road surface of the passing road, and the temporary supports are arranged on two sides of the double-width passing road, so that passing vehicles can be prevented from being impacted; and after the construction acceptance of the bracket foundation 3 is qualified, assembling the components of each part of the bracket from bottom to top.
S3, carrying out a pre-pressing test on the built temporary support, if the pre-pressing test of the temporary support is qualified, carrying out the next step, and if the pre-pressing test of the temporary support is unqualified, carrying out the step S1 again;
s4, mounting the continuous steel box girder on the temporary support in a segmented manner;
s5, single-frame integral unloading of the continuous steel box girder, and dismantling the temporary support, wherein the dismantling is carried out step by step from top to bottom; in steps S4 and S5, the temporary support platform beam 2 is provided with the elevation pier 14 and the jack 15 for adjusting elevation and gradually unloading control during the installation of the steel box beam.
In the scheme, the two groups of assembled temporary supports are assembled and connected through the two groups of scissors supports 9, so that the space utilization rate of the structure is further improved, and the assembled double-door type temporary support for the installation of the viaduct steel box girder is formed, so that the influence of the construction of the continuous steel box girder of the viaduct at the busy traffic section on a passing road can be avoided; the defects that the traditional viaduct steel box girder is required to occupy the road for construction and even road closure are effectively overcome, and the assembled double-door type temporary support is adopted, so that the span of the temporary support is designed according to the width of the road width, the whole lane traffic of the commuted road after the support is erected can be ensured, and the temporary support has little influence on traffic; meanwhile, the assembled double-door type temporary support is stable and reliable in structure, convenient and quick to install and detach, reusable and good in economical efficiency.
In this embodiment, two adjacent fabricated uprights 1 are connected through a flower frame 8, the flower frame 8 includes a first anchor ear 811 and a second anchor ear 812 respectively fixed on two fabricated uprights 1, the flower frame 8 further includes an upper connecting beam connecting the first anchor ear 811 at the top and the second anchor ear 812 at the top, a lower connecting beam connecting the first anchor ear 811 at the bottom and the second anchor ear 812 at the bottom, and a plurality of middle connecting beams connecting the upper connecting beam and the lower connecting beam. The arrangement of the flower stand 8 can promote the connection reliability of two assembly type stand 1 that are close to each other along longitudinal direction, can also guarantee the structural strength of overall structure simultaneously, promotes and supports the reliability, and the assembly method of flower stand 8 simultaneously is simple convenient, only need with the staple bolt 81 locking assembly that corresponds can on the assembly type stand 1 that corresponds, do benefit to the construction use of overall assembly type structure, can also avoid the damage to the structure of counter-pillar body 11.
In this embodiment, the upper connecting beam and the lower connecting beam are parallel to the longitudinal direction, and the plurality of intermediate connecting beams divide the space enclosed by the upper connecting beam, the lower connecting beam and the two assembled columns 1 connected by the upper connecting beam and the lower connecting beam into a plurality of component force areas. The multi-component force area configuration of the flower stand 8 can ensure the structural stability of the flower stand 8, and simultaneously has the function of strengthening the structural strength of the whole structure, in particular to the structure with triangular component force areas in the scheme, which has stronger structural stability.
In this embodiment, the fabricated upright 1 includes a plurality of upright bodies 11 each having flange joints 13 at the top and bottom, the plurality of upright bodies 11 are assembled and connected to form a whole through the flange joints 13, the upright bodies 11 at the bottom of the fabricated upright 1 are assembled on the corresponding bracket bases 3 through the flange joints 13, the upright bodies at the top of the fabricated upright 1 adopt adjustable segments 12 sleeved on the fabricated upright, for example, fig. 7 is a schematic structural diagram of an adjustable segment 121 of the upright with a length less than 500 mm; FIG. 8 is a schematic view of a structure in which the length of the pillar adjustable section 122 is 500mm or more; the arrangement is selected according to the actual situation and will not be described in detail here.
The flower stand 8 is a plurality of groups which are in one-to-one correspondence with the number of the upright post bodies 11 in each assembled upright post 1, and each group of flower stand 8 connects the upright post bodies 11 which are longitudinally opposite in the two groups of assembled upright posts 1. As shown in the figure, the split type assembly structure of the assembled stand column 1 also provides a more convenient construction scheme for the scheme, the height of the assembled stand column 1 is adjusted according to actual demands during use, the stand column body 11 forming the assembled stand column 1 is fastened and connected in a flange connection mode, assembly is more convenient and fast, further, reinforcing rib plates for improving the reliability and structural strength of a connecting node are further arranged on the periphery of the flange, and the reinforcing rib plates are uniformly distributed on the periphery of the flange.
In this embodiment, the fabricated temporary support further includes two side diagonal beams 4 disposed on the same longitudinal side of the platform beam 2, where the two side diagonal beams 4 are respectively supported by two fabricated columns 1 that are located on the same longitudinal side of the platform beam 2 and correspond to each other in the transverse direction. As shown in the figure, two the diagonal bracing beams 4 support a group of assembled temporary supports, and two diagonal bracing beams 4 are located the vertical homonymy of platform roof beam 2, further ensure the support reliability of assembled temporary supports, still further, assembled stand 1 has the journal stirrup 10 that supplies the scissors to prop 9 to connect, still has the connection journal stirrup 10 that supplies the assembly of side diagonal bracing beam 4 on the assembled stand 1, reduce this kind of node and connect the welding degree of difficulty and welding volume, and little to the damage of stand body 11 structure, this connection journal stirrup 10 is the same with the journal stirrup 10 structure that supplies the scissors to prop 9 to be connected, its aim at does not destroy the structure of assembled stand 1, plays stable connection's effect simultaneously, and is not repeated here.
In this embodiment, the temporary fabricated bracket further includes an inner strut 5 connected between the cross beam 21 and the fabricated pillar 1 connected to the cross beam 21. The inner bracing beams 5 are arranged at the stress concentration positions of the assembled temporary support, so that the function of reducing the stress concentration is achieved, and meanwhile, the inner bracing beams 5, the cross beams 21 and the assembled upright posts 1 form a triangular stable supporting structure, so that the supporting reliability and the supporting stability of the assembled temporary support are further ensured.
In this embodiment, the assembled temporary support further includes an operation platform 6 disposed at the bottom of the platform beam 2 in the height direction, and the assembled temporary support further includes a ladder stand 7, where the ladder stand 7 is used to provide a path from a set position into the operation platform 6. And (3) installing the segmented steel box girder by an operator at the high position, wherein the span of each group of gate-type brackets is set according to the width of the passed unilateral road, and the height is determined according to the installation elevation of the viaduct steel box girder.
In this embodiment, the operation platform 6 is assembled at the bottom of the platform beam 2 through a plurality of vertical beams parallel to the height direction, and the ladder stand 7 is arranged at one side of the assembled temporary support, which is far away from the scissor support 9 along the transverse direction, so that the space utilization rate is improved, and meanwhile, the safety of construction workers is ensured. The ladder stand 7 is hung and fixed on a cross rod of the uppermost flower stand 8, and details are omitted.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A double-box continuous steel box girder construction method is characterized in that: the device comprises two groups of assembled temporary brackets and a scissor support for connecting the two groups of assembled temporary brackets;
each group of the assembled temporary supports at least comprises a platform beam, two support foundations and four assembled stand columns, wherein the two support foundations are oppositely arranged in the transverse direction of the same horizontal reference, each two assembled stand columns are oppositely arranged on the same support foundation in the longitudinal direction of the same horizontal reference, the platform beam at least comprises two transverse beams parallel to the transverse direction and a plurality of connecting beams for connecting the two transverse beams, and each transverse beam is supported by the two transversely opposite assembled stand columns;
the two groups of assembled temporary supports are mutually parallel and level in the transverse direction, the two groups of the scissors supports are arranged in parallel in the longitudinal direction, each group of the scissors supports connects two assembled upright posts on one side, which are mutually close in the transverse direction, of the two groups of assembled temporary supports, the central nodes of the two groups of the scissors supports are connected through a reinforcing beam, and the reinforcing beam is parallel to the longitudinal direction;
the method also comprises the following construction steps:
s1, designing an assembled double-door type temporary support according to the single-width of a road and the installation height of a steel box girder;
s2, setting up a temporary support at the sectional position of the steel box girder;
s3, carrying out a pre-pressing test on the built temporary support, if the pre-pressing test of the temporary support is qualified, carrying out the next step, and if the pre-pressing test of the temporary support is unqualified, carrying out the step S1 again;
s4, mounting the continuous steel box girder on the temporary support in a segmented manner;
s5, single-frame integral unloading of the continuous steel box girder and dismantling of the temporary support.
2. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: two adjacent along longitudinal assembled stand passes through the pergola and connects, the pergola is including corresponding respectively fixing two first staple bolt and the second staple bolt on the assembled stand, the pergola still includes the last tie-beam that connects first staple bolt top and second staple bolt top, the lower tie-beam that connects first staple bolt bottom and second staple bolt bottom and the middle tie-beam of a plurality of that connect last tie-beam and lower tie-beam.
3. The double-box continuous steel box girder construction method according to claim 2, wherein: the upper connecting beam and the lower connecting beam are parallel to the longitudinal direction, and the space surrounded by the two assembled upright posts connected with the upper connecting beam, the lower connecting beam and the lower connecting beam is divided into a plurality of component force areas by the plurality of middle connecting beams.
4. The double-box continuous steel box girder construction method according to claim 2, wherein: the assembled stand column comprises a plurality of stand column bodies, wherein the top and the bottom of the stand column bodies are respectively provided with a flange joint, the stand column bodies are assembled and connected to form a whole through the flange joints, the stand column bodies positioned at the bottom of the assembled stand column are assembled on the corresponding support bases through the flange joints, and the stand column bodies positioned at the top of the assembled stand column are assembled on the corresponding cross beams through the flange joints;
the flower stand is a plurality of groups which are in one-to-one correspondence with the number of the upright post bodies in each assembled upright post, and each group of flower stand is used for connecting upright post bodies which are longitudinally opposite in the two groups of assembled upright posts.
5. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: the assembled temporary support further comprises two side diagonal beams which are arranged on the same longitudinal side of the platform beam, and the two side diagonal beams are respectively and correspondingly supported by two assembled upright posts which are positioned on the same longitudinal side of the platform beam along the transverse direction.
6. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: the assembled temporary support further comprises an inner bracing beam connected between the cross beam and the assembled upright post connected with the cross beam.
7. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: the assembled temporary support further comprises an operation platform arranged at the bottom of the platform beam in the height direction, and a crawling ladder used for providing a channel for entering the operation platform from a set position.
8. The method for constructing the double-box continuous steel box girder according to claim 7, wherein: the operation platform is assembled at the bottom of the platform beam through a plurality of vertical beams parallel to the height direction, and the crawling ladder is arranged on one side of the assembled temporary support, which is far away from the scissor support along the transverse direction.
9. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: a plurality of the connecting beams are parallel to the longitudinal direction.
10. The method for constructing the double-box continuous steel box girder according to claim 1, wherein: the assembled stand column is provided with a supporting lug for the connection of the scissor support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310639755.5A CN116623550A (en) | 2023-05-31 | 2023-05-31 | Double-box continuous steel box girder construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310639755.5A CN116623550A (en) | 2023-05-31 | 2023-05-31 | Double-box continuous steel box girder construction method |
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| Publication Number | Publication Date |
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| CN116623550A true CN116623550A (en) | 2023-08-22 |
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|---|---|---|---|
| CN202310639755.5A Pending CN116623550A (en) | 2023-05-31 | 2023-05-31 | Double-box continuous steel box girder construction method |
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| CN (1) | CN116623550A (en) |
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2023
- 2023-05-31 CN CN202310639755.5A patent/CN116623550A/en active Pending
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