CN114370007B - Steel diaphragm small-radius curve beam bridge assembly construction template and construction method - Google Patents
Steel diaphragm small-radius curve beam bridge assembly construction template and construction method Download PDFInfo
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- CN114370007B CN114370007B CN202210180233.9A CN202210180233A CN114370007B CN 114370007 B CN114370007 B CN 114370007B CN 202210180233 A CN202210180233 A CN 202210180233A CN 114370007 B CN114370007 B CN 114370007B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 11
- 238000009966 trimming Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 3
- 206010063659 Aversion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a steel diaphragm beam small-radius curve bridge assembly construction template and a construction method, wherein the template comprises a beam template and dynamic trimming beam end templates, the dynamic trimming beam end templates are fittingly arranged at two ends in the beam template, the change of the beam length and the beam end corner is realized by adjusting the position of the dynamic trimming beam end templates in the beam template and the angle formed by the dynamic trimming beam end templates and the beam template, the dynamic trimming beam end templates comprise a bottom plate, an adjustable plate structure arranged on the outer side of the bottom plate and a sealing structure arranged on the outer side of the adjustable plate structure, the bottom plate, the adjustable plate structure and the sealing structure are sequentially overlapped from inside to outside, the whole size of the dynamic trimming beam end templates is adjusted by adjusting the outward extending distance of the adjustable plate structure, and the sealing structure is arranged at the corner of the beam template to prevent concrete from overflowing during pouring. The invention solves the problem of different lengths of the inner beam and the outer beam of the curve Liang Quxian and the change of the corner of the beam end, reduces the construction difficulty and improves the construction efficiency.
Description
Technical Field
The invention belongs to the technical field of bridge assembly construction, and particularly relates to a steel diaphragm small-radius curve beam bridge assembly construction template and a construction method.
Background
The concrete assembled beam bridge has extremely wide application in various engineering constructions at home and abroad, but the construction mode of setting up the template casting beam on site is high in construction difficulty and tedious in template setting. In particular to a curved beam, because of the difference of the lengths of the inner side beam and the outer side beam and the rotation angle of the beam end, a plurality of sets of templates are needed during prefabrication, but the oblique angle setting of the templates is wrong, so that the phenomenon of chiseling out the prefabricated section of the beam is still common, and the development of rapid high-quality intelligent assembly and construction of a beam bridge is severely restricted.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a steel diaphragm small-radius curve beam bridge assembly construction template and a construction method.
In order to achieve the above purpose, the following technical scheme is provided:
the utility model provides a steel diaphragm beam small radius curve beam bridge assembly construction template, includes beam form and dynamic fine setting beam end template, and the inside both ends of beam form are located in the fit of dynamic fine setting beam end template, through the change in the change of the beam length and beam end corner that the position of adjustment dynamic fine setting beam end template in beam form and dynamic fine setting beam end template and beam form become.
Further, the dynamic fine-tuning beam end template comprises a bottom plate, an adjustable plate structure arranged outside the bottom plate and a sealing structure arranged outside the adjustable plate structure, the bottom plate, the adjustable plate structure and the sealing structure are sequentially overlapped from inside to outside, the distance of the outwards extending of the adjustable plate structure is adjusted, the whole size of the dynamic fine-tuning beam end template is adjusted, the sealing structure is arranged at the corner of the beam template, and concrete is prevented from overflowing during pouring.
Further, the adjustable plate structure comprises a first expansion plate, a second expansion plate and a third expansion plate, the upper end of the second expansion plate is contacted with the lower end of the first expansion plate, the lower end of the second expansion plate is contacted with the upper end of the third expansion plate, and the adjustment of the width of the different positions of the dynamic fine-tuning beam end template is realized by respectively adjusting the extending distances of the first expansion plate, the second expansion plate and the third expansion plate to two sides.
Further, the first expansion plate, the second expansion plate and the third expansion plate respectively comprise a connecting rod and connecting plates arranged at two ends of the connecting rod, and the distance between the connecting plates at two ends of the connecting rod is adjusted by adjusting the length of the connecting rod.
Further, the connecting rod include threaded rod and be used for connecting the connecting piece of both sides screw rod, the one end and the connecting piece threaded connection of threaded rod, the other end is connected with the connecting plate.
Further, the sliding tray has been seted up to the lateral surface that bottom plate and adjustable plate structure overlap, and the through-hole has been seted up in the centre of bottom plate, and the medial surface of the connecting plate of adjustable plate structure is equipped with the draw runner, and the draw runner cooperates with the sliding tray, and when connecting rod length adjustment, the draw runner is inside and outside the sliding tray removes, restricts the process of removing, prevents to take place the aversion from top to bottom.
Further, seal structure include seal structure and lower seal structure, seal structure includes link plate and overhead gage, the overhead gage is located the upper corner of beam form, the side touches with beam form and internal surface overlaps with first expansion plate and second expansion plate part, one end of link plate is the couple structure, hang the upper end at first expansion plate and bottom plate, the other end and the overhead gage of link plate are articulated, the link plate can slide along first expansion plate back and forth, the overhead gage can take place rotatoryly around the pin joint, lower seal structure includes lower baffle and scalable vaulting pole, scalable vaulting pole's structure is the same with connecting rod structure, lower baffle is located beam form's lower corner department, the side touches with beam form and internal surface overlaps with second expansion plate and third expansion plate part, lower baffle is articulated with third expansion plate, scalable vaulting pole is used for supporting lower baffle, overhead gage and lower baffle preferably the triangular plate, the overhead gage takes place to rotate under the effect of gravity until the side touches with beam form inboard, lower baffle's position inboard through scalable vaulting pole adjustment lower baffle, until the side touches with beam form inboard.
Further, before the concrete girder construction is poured, a reinforcement cage is arranged between the girder template and the dynamic fine-tuning girder end template, and a pre-buried steel plate for connecting the girder template is pre-buried between the reinforcement cage and the girder template.
Further, when the connected steel diaphragm is a three-point steel diaphragm, the installation position of the embedded steel plate between the adjacent beam templates conforms to the following formula:
the difference value of the horizontal directions of the two ends of the opposite embedded steel plates at different sides in the same beam template is as follows:
the difference value of the horizontal directions of the two ends of the embedded steel plates in the adjacent beam templates is as follows:
wherein h represents the width, b represents the interval between the steel diaphragm templates, and thetai represents the position included angle between the curve Liang Banjing and the embedded steel plate;
wherein d i The distance between the embedded steel plate and the center of the beam template at the outermost end is represented by R, the curve Liang Banjing is represented by R, and the central angle corresponding to the curve beam is represented by alpha.
A construction method for assembling and building templates of a small-radius curved beam bridge of a steel diaphragm comprises the following steps:
1) Arranging a pre-buried steel plate on the inner wall of the beam template, and then arranging a reinforcement cage in the beam template for connection;
2) The first expansion plate, the second expansion plate and the third expansion plate are connected with the bottom plate in an overlapping way, the sliding strips are matched with the sliding grooves, and the length of the connecting rod is adjusted according to the width of the beam template, so that the side edge of the adjusted dynamic fine-tuning beam end template is contacted with the inner side of the beam template;
3) According to the length of the beam and the angle of the beam end required by construction, placing the adjusted dynamic fine-tuning beam end template at the beam end of the beam template, and setting the beam end template at a proper position and angle;
4) Hanging a hanging plate of an upper sealing structure on a connecting plate and a bottom plate of a first expansion plate, rotating the upper baffle downwards until the side edge of the upper baffle contacts with the inner side of a beam template due to the action of gravity, hinging a lower baffle with a connecting plate of a third expansion plate, supporting a telescopic stay bar below the lower baffle, adjusting the length of the telescopic stay bar until the side edge of the lower baffle contacts with the inner side of the beam template, finishing the installation of a dynamic fine-tuning beam end template, and then performing concrete pouring on the beam template;
5) The precast beams are connected by adopting steel transverse beams.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention adopts the mode that the dynamic fine-tuning beam end templates are arranged at the two ends of the beam templates to limit the length of the beam and the size of the beam end corners, so that the problems of different beam lengths and beam end corner changes inside and outside a curve Liang Quxian can be solved, the construction difficulty is greatly reduced, and the construction efficiency is improved;
2) The invention adopts the mode of connecting the steel diaphragm beam and the embedded steel plate to realize the connection between the beams, does not need to additionally provide a reserved hole, and has simple construction and high efficiency.
Drawings
FIG. 1 is a schematic diagram of a dynamic trimming beam-end template assembly of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional structure of a dynamic trimming beam-end template according to the present invention;
FIG. 3 is a schematic perspective view of a base plate according to the present invention;
FIG. 4 is a schematic perspective view of the dynamic trimming beam end template of the present invention after the base plate is removed;
FIG. 5 is a schematic perspective view of the present invention;
FIG. 6 is a schematic view of an installation structure of a pre-buried steel plate according to the present invention;
FIG. 7 is a schematic view of the calculation of the installation position of the embedded steel plate of the invention;
FIG. 8 is a schematic perspective view of a connecting rod according to the present invention;
fig. 9 is a schematic diagram of the connection relationship between the embedded steel plate and the steel diaphragm when the steel diaphragm is of three-point type.
In the figure: 1. a beam template; 2. dynamically fine-tuning a beam end template; 21. a bottom plate; 22. an adjustable plate structure; 221. a first expansion plate; 222. a second expansion plate; 223. a third expansion plate; 224. a connecting rod; 2241. a threaded rod; 2242. a connecting piece; 225. a connecting plate; 23. a sealing structure; 231. an upper sealing structure; 232. a lower sealing structure; 2311. a hanging plate; 2312. an upper baffle; 2321. a lower baffle; 2322. a retractable brace; 3. and (5) embedding a steel plate.
Detailed Description
The invention will be further described with reference to the drawings, but the scope of the invention is not limited thereto.
As shown in fig. 1 to 4, the dynamic fine tuning beam end template 2 is in an i shape, and comprises a bottom plate 21, an adjustable plate structure 22 and a sealing structure 23, wherein the adjustable plate structure 22 is arranged on the outer side of the bottom plate 21 and is overlapped with the bottom plate 21, a sliding groove is formed on the outer side surface of the bottom plate 21 overlapped with the adjustable plate structure 22, a through hole is formed in the middle of the bottom plate 21, a sliding strip is arranged on the inner side surface of a connecting plate 225 of the adjustable plate structure 22, the sliding strip is matched with the sliding groove, the adjustable plate structure 22 comprises a first expansion plate 221, a second expansion plate 222 and a third expansion plate 223, the upper end of the second expansion plate 222 is contacted with the lower end of the first expansion plate 221, the lower end of the second expansion plate 222 is contacted with the upper end of the third expansion plate 223, the first expansion plate 221, the second expansion plate 222 and the third expansion plate 223 respectively comprise a connecting rod 224 and connecting plates 225 arranged at two ends of the connecting rod 224, as shown in fig. 8, the connection rod 224 includes two threaded rods 2241 and a connection member 2242 for connecting the threaded rods 2241 on both sides, one end of the threaded rod 2241 is in threaded connection with the connection member 2242, the other end is connected with the connection plate 225, the length of the connection rod 224 is adjusted by adjusting the threaded connection positions of the threaded rods 2241 and the connection member 2242, thereby adjusting the distance between the connection plate 225 and the connection plate 225, the sealing structure 23 is arranged on the outer side of the adjustable plate structure 22 and partially overlaps the adjustable plate structure 22, the sealing structure 23 includes an upper sealing structure 231 and a lower sealing structure 232, the upper sealing structure 231 includes a hanging plate 2311 and an upper baffle 2312, the upper baffle 2312 is positioned at the upper corner of the beam template 1, the upper baffle 2312 in the figure is selected as a triangle, the side edge contacts the beam template 1 and the inner surface partially overlaps the first telescopic plate 221 and the second telescopic plate 222, one end of the hanging plate 2311 is a hook structure, the upper ends of the first telescopic plate 221 and the bottom plate 21 are hung, the other end of link 2311 is articulated with upper shield 2312, and link 2311 can slide along first expansion plate 221, and upper shield 2312 can take place rotatoryly around the pin joint, and lower seal structure 232 includes lower shield 2321 and scalable vaulting pole 2322, and scalable vaulting pole 2322's structure is the same with connecting rod 224 structure, and lower shield 2321 is located beam form 1's lower corner department, and lower shield 2321 in the figure selects for triangle-shaped, and the side touches with beam form 1 and internal surface and second expansion plate 222 and third expansion plate 223 part overlap, and lower shield 2321 articulates with third expansion plate 223, and scalable vaulting pole 2322 is used for supporting lower shield 2321.
As shown in fig. 5 and 6, a steel diaphragm beam small-radius curve bridge assembly building template comprises a beam template 1 and dynamic fine-tuning beam end templates 2 matched with two ends inside the beam template 1, wherein the position of the dynamic fine-tuning beam end templates 2 inside the beam template 1 and the angle formed by the dynamic fine-tuning beam end templates 2 and the beam template 1 are adjusted to change the length of a beam and the angle of the beam end, the problems that the length of the beam is different inside and outside a curve Liang Quxian and the angle of the beam end is changed are solved, a reinforcement cage is arranged between the beam template 1 and the dynamic fine-tuning beam end templates 2 before concrete girder construction pouring, and a pre-buried steel plate 3 for connecting the beam template 1 is pre-buried between the reinforcement cage and the beam template 1.
As shown in fig. 7 and 9, when a three-point steel diaphragm beam is used for the beam-to-beam connection, the installation positions of the pre-buried steel plates 3 of the adjacent beam templates 1 satisfy the following formula:
the difference values of the horizontal directions of the two ends of the opposite embedded steel plates 3 at different sides in the same beam template 1 are as follows:
the difference value of the horizontal directions of the two ends of the embedded steel plates 3 in the adjacent beam templates 1 is as follows:
wherein h represents the width, b represents the spacing between the steel spreader plates 1, θ i The position included angle between the curve Liang Banjing and the embedded steel plate 3 is shown;
wherein d i The distance between the embedded steel plate 3 and the center of the beam template 1 at the outermost end is represented by R, the curve Liang Banjing is represented by R, and the central angle corresponding to the curve beam is represented by alpha.
A construction method for assembling and building templates of a small-radius curved beam bridge of a steel diaphragm comprises the following steps:
1) Arranging an embedded steel plate 3 on the inner wall of the beam template 1, and then placing a reinforcement cage in the beam template 1 for connection;
2) The first expansion plate 221, the second expansion plate 222 and the third expansion plate 223 are connected with the bottom plate 21 in an overlapping way, the sliding strips are matched with the sliding grooves, and the length of the connecting rod 224 is adjusted according to the width of the beam template 1, so that the side edge of the adjusted dynamic fine-tuning beam end template 2 is contacted with the inner side of the beam template 1;
3) According to the length of the beam and the size of the corner of the beam end required by construction, placing the regulated dynamic fine-tuning beam end template 2 at the beam end of the beam template 1, and setting the beam end template as a proper position and angle; 4) Hanging a hanging plate 2311 of an upper sealing structure 231 on a connecting plate 225 and a bottom plate 21 of a first expansion plate 221, rotating an upper baffle 2312 downwards under the action of gravity until the side edge of the upper baffle 2312 contacts the inner side of a beam template 1, hinging a lower baffle 2321 with the connecting plate 225 of a third expansion plate 223, supporting a telescopic supporting rod 2322 below the lower baffle 2321, adjusting the length of the telescopic supporting rod 2322 until the side edge of the lower baffle 2321 contacts the inner side of the beam template 1, finishing the installation of a dynamic fine-tuning beam end template 2, and then performing concrete pouring on the beam template 1;
5) The precast beams are connected by adopting steel transverse beams.
Claims (7)
1. The steel diaphragm beam small-radius curve bridge assembly building template is characterized by comprising a beam template (1) and dynamic fine-tuning beam end templates (2), wherein the dynamic fine-tuning beam end templates (2) are fit at two ends inside the beam template (1), and the change of the beam length and the beam end corner is realized by adjusting the position of the dynamic fine-tuning beam end templates (2) inside the beam template (1) and the angle formed by the dynamic fine-tuning beam end templates (2) and the beam template (1);
the dynamic fine-tuning beam end template (2) comprises a bottom plate (21), an adjustable plate structure (22) arranged on the outer side of the bottom plate (21) and a sealing structure (23) arranged on the outer side of the adjustable plate structure (22), wherein the bottom plate (21), the adjustable plate structure (22) and the sealing structure (23) are sequentially overlapped from inside to outside, the whole size of the dynamic fine-tuning beam end template (2) is adjusted by adjusting the outwards extending distance of the adjustable plate structure (22), and the sealing structure (23) is arranged at the corner of the beam template (1) to prevent concrete from overflowing during pouring;
the adjustable plate structure (22) comprises a first expansion plate (221), a second expansion plate (222) and a third expansion plate (223), wherein the upper end of the second expansion plate (222) is contacted with the lower end of the first expansion plate (221), the lower end of the second expansion plate (222) is contacted with the upper end of the third expansion plate (223), and the width of different positions of the dynamic fine-tuning beam end template (2) is adjusted by respectively adjusting the extending distances of the first expansion plate (221), the second expansion plate (222) and the third expansion plate (223) to two sides;
the first expansion plate (221), the second expansion plate (222) and the third expansion plate (223) respectively comprise a connecting rod (224) and connecting plates (225) arranged at two ends of the connecting rod (224), and the distance between the connecting plates (225) at two ends of the connecting rod (224) is adjusted by adjusting the length of the connecting rod (224).
2. The steel diaphragm small radius curved beam bridge assembly building template according to claim 1, wherein the connecting rod (224) comprises a threaded rod (2241) and a connecting piece (2242) for connecting the threaded rods (2241) on two sides, one end of the threaded rod (2241) is in threaded connection with the connecting piece (2242), and the other end is connected with the connecting plate (225).
3. A steel diaphragm small radius curved beam bridge assembly construction formwork as claimed in claim 2, characterized in that the outer side surface of the base plate (21) overlapping the adjustable plate structure (22) is provided with a sliding groove, the middle of the base plate (21) is provided with a through hole, the inner side surface of the connecting plate (225) of the adjustable plate structure (22) is provided with a sliding strip, and the sliding strip is mutually matched with the sliding groove.
4. A steel diaphragm beam small radius curved beam bridge assembly construction formwork as claimed in claim 3, wherein the sealing structure (23) comprises an upper sealing structure (231) and a lower sealing structure (232), the upper sealing structure (231) comprises a hanging plate (2311) and an upper baffle (2312), the upper baffle (2312) is located at an upper corner of the beam formwork (1), the side edge is contacted with the beam formwork (1) and the inner surface is partially overlapped with the first expansion plate (221) and the second expansion plate (222), one end of the hanging plate (2311) is a hook structure and is hung at the upper ends of the first expansion plate (221) and the bottom plate (21), the other end of the hanging plate (2311) is hinged with the upper baffle (2312), the upper baffle (2312) can rotate around a hinging point, the lower sealing structure (232) comprises a lower baffle (2321) and a telescopic support rod (2322), the structure of the telescopic support rod (2322) is identical to that of the connecting rod (224), the lower baffle (2321) is located at the lower corner of the beam formwork (1) and is contacted with the second expansion plate (2321) and is overlapped with the inner surface of the third expansion plate (2321) and the third expansion plate (2322).
5. A steel diaphragm small radius curve beam bridge assembly construction formwork as claimed in claim 1, wherein a reinforcement cage is arranged between the beam formwork (1) and the dynamic fine tuning beam end formwork (2) before the concrete main beam is constructed and poured, and a pre-buried steel plate (3) for connecting the beam formwork (1) is pre-buried between the reinforcement cage and the beam formwork (1).
6. A steel diaphragm small radius curved beam bridge fitting construction form according to claim 5, characterized in that when the connected steel diaphragm is a three-point steel diaphragm, the installation position of the pre-buried steel plate (3) between adjacent beam forms (1) corresponds to the following formula:
the difference values of the horizontal directions of the two ends of the opposite embedded steel plates (3) at different sides in the same beam template (1) are as follows:
，
the difference value of the horizontal directions of the two ends of the embedded steel plates (3) in the adjacent beam templates (1) is as follows:
，
in the method, in the process of the invention,hthe width is indicated as such,bthe distance between the steel diaphragm templates (1) is represented, and thetai represents the position included angle between the curve Liang Banjing and the embedded steel plate (3);
，
in the method, in the process of the invention,d i represents the distance between the embedded steel plate (3) and the center of the beam template (1) at the outermost end,Ra curve Liang Banjing is shown which is a graph,αand represents the central angle corresponding to the curved beam.
7. A method of constructing a steel diaphragm small radius curved beam bridge assembly building formwork as claimed in claim 4, comprising the steps of:
1) Arranging a pre-buried steel plate (3) on the inner wall of the beam template (1), and then arranging a reinforcement cage in the beam template (1) for connection;
2) The first expansion plate (221), the second expansion plate (222) and the third expansion plate (223) are connected with the bottom plate (21) in an overlapping mode, the sliding strips are matched with the sliding grooves, and the length of the connecting rod (224) is adjusted according to the width of the beam template (1) so that the side edge of the adjusted dynamic fine-tuning beam end template (2) is contacted with the inner side of the beam template (1);
3) According to the length of the beam and the size of the corner of the beam end required by construction, placing the regulated dynamic fine-tuning beam end template (2) at the beam end of the beam template (1) and setting the beam end template as a proper position and angle;
4) Hanging a hanging plate (2311) of an upper sealing structure (231) on a connecting plate (225) and a bottom plate (21) of a first expansion plate (221), rotating an upper baffle plate (2312) downwards under the action of gravity until the side edge of the upper baffle plate (2312) contacts with the inner side of a beam template (1), hinging a lower baffle plate (2321) with the connecting plate (225) of a third expansion plate (223), supporting a telescopic stay bar (2322) below the lower baffle plate (2321), adjusting the length of the telescopic stay bar (2322) until the side edge of the lower baffle plate (2321) contacts with the inner side of the beam template (1), finishing the installation of a dynamic fine-tuning beam end template (2), and then pouring concrete on the beam template (1);
5) The precast beams are connected by adopting steel transverse beams.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210180233.9A CN114370007B (en) | 2022-02-25 | 2022-02-25 | Steel diaphragm small-radius curve beam bridge assembly construction template and construction method |
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| CN114370007B true CN114370007B (en) | 2024-02-23 |
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| CN114953122B (en) * | 2022-06-20 | 2023-12-15 | 中交一公局西南工程有限公司 | Cast-in-situ multifunctional splicing die for small-radius curved beam bridge |
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| KR101153430B1 (en) * | 2012-02-15 | 2012-06-07 | 주식회사 수성엔지니어링 | Portable mold for curved psc girder, the girder and girder bridge construction method using the same |
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| CN114370007A (en) | 2022-04-19 |
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