CN212895944U - Cross-line skew cast-in-place construction device based on main beam being Bailey beam - Google Patents
Cross-line skew cast-in-place construction device based on main beam being Bailey beam Download PDFInfo
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- CN212895944U CN212895944U CN202021407579.0U CN202021407579U CN212895944U CN 212895944 U CN212895944 U CN 212895944U CN 202021407579 U CN202021407579 U CN 202021407579U CN 212895944 U CN212895944 U CN 212895944U
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Abstract
The utility model provides a cast-in-place construction equipment of overline skew based on girder is bailey roof beam belongs to bridge construction technical field, including bar basis, stand, sand section of thick bamboo, first distribution roof beam, second distribution roof beam, bailey roof beam and formwork component, the bar basis is used for fixing on pier and basic ground, and the stand is all vertical to set firmly on the bar basis, sets gradually sand section of thick bamboo above the stand, first distribution roof beam, second distribution roof beam and bailey roof beam, and the junction of a plurality of bailey trusses is located the distribution roof beam according to 3m or 3 m's multiple, and formwork component props up and establishes in bailey roof beam upper end. The utility model provides a cast-in-place construction equipment of overline skew based on girder is bailey roof beam has and can all be located the distributive girder according to 3m or 3 m's multiple to the junction of bailey truss under the overline skew line, and the distributive girder supports stably, need not establish in addition and strengthen the perpendicular rib, can make bailey support system satisfy the designing requirement, reduces construction cost and the technological effect of being convenient for install and remove.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, more specifically say, relate to a cast-in-place construction equipment of cross line skew based on girder is bailey roof beam.
Background
The Bailey bracket is convenient to disassemble and assemble, flexible in construction and strong in terrain adaptability, can be used as a support system of a cast-in-place section in both a soft foundation and a high pier large-span structure, and is widely used in road and railway construction due to good performance. Three kinds of Bailey supporting structures are listed, and the defects of the structure are analyzed.
The bridge to be built is obliquely crossed with the crossing road, if the strip foundation and the distribution beam are arranged along the road, the arrangement direction of the Bailey beam is consistent with the axial direction of the bridge, the arrangement form enables the joint of the Bailey beam and the distribution beam to have an included angle, the joint of the Bailey beam cannot be completely positioned on the distribution beam according to the multiple of 3m or 3m, Bailey pieces are dispersed in stress, and the stress safety of the structure can be ensured only by additionally arranging a reinforcing vertical rod. The Bailey vertical rod is not arranged right above the steel pipe vertical rod, so that reinforcement treatment is carried out, namely, a finish rolling screw rod is embedded in the top of the steel pipe vertical rod, a steel plate bracket is installed to form a support, then a double-assembly I40I-shaped steel transverse distribution beam is installed on the upper portion of the bracket, the Bailey beam is assembled on the upper portion of the bracket, and a double No. 10 channel steel is additionally arranged to reinforce, so that the distribution beam and the Bailey beam are connected at the supporting point of the vertical rod.
If adopt bailey + full hall support arrangement form, bar basis and distributive girder all set up along the road, and the bailey support sets up with the distributive girder is perpendicular, and this kind of arrangement form though can solve superstructure support problem, nevertheless has the contained angle between bridge axis and bailey girder axis, and superstructure atress performance is relatively poor, because bailey and full hall support rigidity are inconsistent, and superstructure construction is easy to appear warping, and the material is many, and is with high costs.
If a continuous Bailey beam arrangement form is adopted, the strip foundation and the distribution beam are arranged along the road, the Bailey supports are perpendicular to the distribution beam, full supports are not arranged, the strip foundation is additionally arranged, the Bailey beam is extended to the bridge abutment position of the pier, the stress performance of the arrangement form at the end connection part is poor, Bailey beam vertical rods at the end parts of two sides cannot be placed right above the distribution beam, the upper shearing force cannot be transmitted to the pier stud through the Bailey vertical rods, and an included angle exists between the axis of the bridge and the axis of the Bailey beam.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cast-in-place construction equipment of cross line skew based on girder is bailey roof beam, aim at solving under the cross line skew line bailey truss's junction and can not be located the distributive girder according to 3m or 3 m's multiple, support unstable technical problem.
In order to achieve the above object, the utility model adopts the following technical scheme: the provided cross-line diagonal cast-in-place construction device based on the main beam as the Bailey beam comprises a plurality of strip foundations, an upright post, a sand cylinder, a first distribution beam, a second distribution beam, the Bailey beam and a formwork component, wherein the strip foundations are respectively used for being fixed on a pier and a foundation, and the strip foundations fixed on the foundation are arranged along the length direction of a crossing road; the plurality of stand columns are vertically and fixedly arranged on the strip foundation; a plurality of sand cylinders are arranged at the upper end of each upright post; the first distribution beam is fixedly arranged at the upper ends of the sand cylinders, is transversely arranged and is parallel to the road direction, and is used for transmitting the bearing force acting on the first distribution beam to the strip foundation; the second distribution beam is fixedly arranged at the upper end of the first distribution beam, transversely arranged and placed with the length direction perpendicular to the length direction of the Bailey beam, and is used for transmitting bearing force acting on the second distribution beam to the first distribution beam; the Bailey beams are fixedly arranged at the upper ends of the second distribution beams, the Bailey beams are transversely arranged, the joints of the Bailey trusses of the Bailey beams are positioned on the second distribution beams according to multiples of 3m or 3m, the length direction of the Bailey beams is parallel to the connecting line direction of the two piers and is vertical to the length direction of the second distribution beams, and the Bailey beams are used for bearing; and the formwork supporting component is supported at the upper end of the Bailey beam to form a formwork frame for supporting cast-in-place concrete.
As another embodiment of the application, a flange plate is pre-embedded on each strip-shaped base, and the stand columns are fixedly connected to the flange plates.
As another embodiment of this application, adjacent two be equipped with the bridging between the stand, be used for stably the stand, the bridging adopts 20b channel-section steel to make.
As another embodiment of this application, the stand is the steel pipe stand, the stand adopts phi 530 shaped steel pipe to make, and the lower extreme sets firmly on the ring flange, the stand transverse orientation datum line is the bridge axis, the stand longitudinal orientation datum line is the pier center line.
As another embodiment of the present application, the second distribution beams are made of triple-split 40b i-beams, the pitch module of the second distribution beams is 3m or a multiple of 3m, and the joints above the second distribution beams are used for supporting a plurality of beret trusses on the beret beams.
As another embodiment of the present application, the beret beams are made by splicing 321-type beret truss pieces, and the joints of the beret trusses of the beret beams are located right above the distribution beams according to a multiple of 3m or 3 m.
As another embodiment of this application, formwork assembly can dismantle the connection and be in the beiLei roof beam upper end, including a plurality of bamboo plywood and a plurality of square timber that mutually support and connect, it is a plurality of the equal vertical setting of square timber is in beiLei roof beam tip, it is a plurality of bamboo plywood encloses into U type structure and is used for cast in situ concrete to pour into, and is a plurality of bamboo plywood with the help of square timber is fixed on the beiLei roof beam.
As another embodiment of the application, the bearing capacity of the strip foundation fixed on the foundation is larger than 300kPa, and the bearing capacity of the strip foundation fixed on the pier is larger than 210 kPa.
As another embodiment of the application, the size of the strip foundation is 2000cm multiplied by 120cm, and the strip foundation is made of cast-in-place C30 concrete.
As another embodiment of the application, the thickness of the bamboo plywood is 13-17mm, the sectional dimension of the square timber is 10cm multiplied by 10cm, and the bamboo plywood positioned at the end part of the Bailey beam is fixedly connected on the square timber.
The utility model provides a cast-in-place construction equipment of overline skew based on girder is bailey roof beam's beneficial effect lies in: compared with the prior art, the cross-line skew cast-in-place construction device based on the Bailey beams as the main beams fixes the strip foundation on the piers or the foundation and arranges the strip foundation along the length direction of the crossing road, the upright columns are arranged on the strip foundation, the sand cylinders are arranged at the upper ends of the upright columns, the first distribution beams are arranged at the upper ends of the plurality of sand cylinders, the second distribution beams are arranged on the first distribution beams, the Bailey beams are arranged on the second distribution beams, so that the joints of the Bailey trusses are positioned on the second distribution beams according to multiples of 3m or 3m, the length direction of the Bailey beams is parallel to the connecting line direction of the two piers and is vertical to the length direction of the second distribution beams, then the Bailey beams are provided with the formwork components, cast-in-place concrete can be poured on the formwork components, then a cross-line skew cast-in-place supporting system can be formed, the problem that the joints of the Bailey trusses under the cross-line skew lines can not be positioned on the distribution beams according to multiples of, the support is unstable, the connecting part of the Bailey truss under the cross line diagonal line can be completely positioned on the distribution beam according to the multiple of 3m or 3m, the distribution beam is stable in support, and no additional reinforcing vertical rib is needed, so that the Bailey support system can meet the design requirement, the construction cost is reduced, and the Bailey support system is convenient to assemble and disassemble.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a cross-line skew cast-in-place construction device based on a bailey beam as a main beam according to an embodiment of the present invention;
fig. 2 is a top view of a cross-line skew cast-in-place construction device based on a bailey beam as a main beam according to an embodiment of the present invention;
fig. 3 is a side view of a cross-line skew cast-in-place construction device based on a bailey beam as a main beam according to an embodiment of the present invention;
fig. 4 is another side view of the cast-in-place construction device of overline skew that the embodiment of the utility model provides a be based on the girder is beiLei roof beam.
In the figure: 1. a strip foundation; 2. a column; 3. a sand cylinder; 4. a first distribution beam; 5. a second distribution beam; 6. a Bailey beam; 7. a formwork component is supported; 8. a bridge pier; 9. a foundation base; 10. a flange plate; 11. and (4) supporting the scissors.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, a description will now be given of a cross-line skew cast-in-place construction device based on bailey beams as main beams according to the present invention. The cross-line skew cast-in-place construction device with the main beams as the Bailey beams comprises a plurality of strip foundations 1, upright columns 2, sand cylinders 3, first distribution beams 4, second distribution beams 5, Bailey beams 6 and formwork support assemblies 7, wherein the strip foundations 1 are respectively used for being fixed on piers 8 and foundation foundations 9, and the strip foundations 1 fixed on the foundation foundations 9 are arranged along the length direction of a crossing road; the upright posts 2 are vertically and fixedly arranged on the strip foundation 1; a plurality of sand cylinders 3 are arranged at the upper end of each upright post 2; the first distribution beam 4 is fixedly arranged at the upper ends of the sand cylinders 3, and the first distribution beam 4 is transversely arranged, is parallel to the road direction and is used for transmitting the bearing capacity acting on the first distribution beam 4 to the strip foundation 1; the second distribution beam 5 is fixedly arranged at the upper end of the first distribution beam 4, the second distribution beam 5 is transversely arranged, the length direction of the second distribution beam is perpendicular to the length direction of the Bailey beam 6, and the second distribution beam is used for transmitting the bearing force acting on the second distribution beam 5 to the first distribution beam 4; the Bailey beams 6 are fixedly arranged at the upper ends of the second distribution beams 5, the Bailey beams 6 are transversely arranged, the joints of a plurality of Bailey trusses of the Bailey beams 6 are positioned on the second distribution beams 5 according to multiples of 3m or 3m, the length direction of the Bailey beams 6 is parallel to the connecting line direction of the two piers 8 and is vertical to the length direction of the second distribution beams 5, and the Bailey beams 6 are used for bearing; and the formwork supporting component 7 is erected at the upper end of the Bailey beam 6 to form a formwork for supporting cast-in-place concrete.
Compared with the prior art, the cross line skew cast-in-place construction device based on the Bailey beam as the main beam has the advantages that the strip foundation 1 is fixed on the piers 8 or the foundation 9 and is arranged along the length direction of a crossing road, the strip foundation 1 is provided with the upright posts 2, the upper ends of the upright posts 2 are provided with the sand cylinders 3, the upper ends of the sand cylinders 3 are provided with the first distribution beams 4, the first distribution beams 4 are provided with the second distribution beams 5, the second distribution beams 5 are provided with the Bailey beams 6, the joints of the Bailey trusses are positioned on the second distribution beams 5 according to multiples of 3m or 3m, the length direction of the Bailey beams 6 is parallel to the connecting line direction of the two piers 8 and is vertical to the length direction of the second distribution beams 5, the Bailey beams 6 are provided with the formwork supporting assembly 7, the cast-in-place concrete can be cast on the formwork assembly 7, the cast-in-place supporting system of the cross-line skew can be formed, the technical problems that the joints of the Bailey trusses under the cross-line skew lines cannot be positioned on the distribution beams according to multiples of 3m or 3m and the support is unstable in the prior art are solved, the connecting joints of the Bailey trusses under the cross-line skew lines can be all positioned on the second distribution beams 5 according to multiples of 3m or 3m, the second distribution beams 5 are stably supported, and no additional reinforcing vertical rib is needed, so that the Bailey supporting system can meet the design requirements, the construction cost is reduced, and the Bailey supporting system is convenient to assemble and disassemble.
As the utility model provides a cast-in-place construction equipment of overline skew based on girder is bailey roof beam's a concrete implementation way, please refer to fig. 1 to fig. 4, all pre-buried flange dish 10 that has on every bar basis 1, the equal fixed connection of stand 2 is on flange dish 10.
As the utility model provides a cast-in-place construction equipment of overline skew based on girder is bailey roof beam's a concrete implementation way, please refer to fig. 1 to fig. 4, is equipped with bridging 11 between two adjacent stands 2, and bridging 11 is used for stabilizing stand 2, and bridging 11 adopts the 20b channel-section steel to make.
The utility model provides a cast-in-place construction equipment of overline skew is based on girder is the important assurance of bridge construction, can solve under the overline skew line Bailey truss's the junction according to 3m or the difficult problem that the multiple of 3m can not all be located the distributive girder, need not establish in addition and strengthen the vertical rib, does not adopt full hall support, alleviates the condition of traffic jam during the construction, uses continuous Bailey 6 structures, and the atress can satisfy the designing requirement. On the basis of the advantages of advanced technology, safety, reliability, low price and high cost performance, the construction structure can be further optimized and improved.
As the utility model provides a cast-in-place construction equipment's of overline skew based on girder is bailey roof beam a concrete implementation mode please refer to and show 1 to fig. 4, stand 2 is steel pipe stand 2, and stand 2 adopts phi 530 shaped steel pipe to make, and the lower extreme sets firmly on ring flange 10, and 2 horizontal positioning datum lines of stand are the bridge axis, and 2 vertical positioning datum lines of stand are pier 8 central lines. The arrangement number of the upright posts 2 can be determined according to the actual checking calculation of construction.
As a specific implementation manner of the cast-in-place construction equipment of overline skew based on the main beam is bei lei beam, please refer to fig. 1 to 4, the second distribution beam 5 is made of three-piece type 40b i-steel, the spacing module of the second distribution beam 5 is 3m or 3m multiple, the second distribution beam 5 is arranged above the first distribution beam 4, and the connection part of a plurality of bei lei trusses on the bei lei beam 6 is used for supporting directly above the second distribution beam 5. Since the length of the bery beam 6 is typically 3m in a specific construction, the first and second distribution beams 4 and 5 can be arranged at a distance consistent with the arrangement of the bery beams 6, so that the second distribution beam 5 can support the connection of multiple bery trusses on the bery beam 6 directly above.
As the utility model provides a cast-in-place construction equipment of overline skew for bailey roof beam based on girder please refer to fig. 1 to 4, bailey roof beam 6 adopts 321 type bailey truss pieces concatenation to make, and the junction of bailey truss of bailey roof beam 6 is located directly over second distribution roof beam 5 according to 3m or 3 m's multiple.
As the utility model provides a cast-in-place construction equipment's of overline skew based on girder is bailey roof beam a concrete implementation mode please refer to and show 1 to 4, and the connection can be dismantled in 6 upper ends of bailey roof beam to formwork subassembly 7, including a plurality of bamboo plywood and a plurality of square timber that mutually support and connect, the equal vertical setting of a plurality of square timber is at 6 tip of bailey roof beam, and a plurality of bamboo plywood enclose into U type structure and be used for cast in situ concrete pouring, and a plurality of bamboo plywood are fixed on bailey roof beam 6 with the help of square timber.
Specifically, after the plurality of bamboo plywood and the plurality of square timbers are installed, the construction of the upper structure of the bridge can be carried out.
As the utility model provides a cast-in-place construction equipment's of overline skew based on girder is bailey roof beam a specific implementation way please refer to fig. 1 to fig. 4, fixes the bearing capacity of bar foundation 1 on basic foundation 9 and is greater than 300kPa, fixes the bearing capacity of bar foundation 1 on pier 8 and is greater than 210 kPa.
In this embodiment, the intersection point position of the bridge axis and the crossing line axis, the axis intersection angle and the axis distance of each buttress are rechecked before construction, the strip foundation 1 can be arranged behind the recheck without errors, the bearing capacity characteristic value of the strip foundation 1 on the foundation 9 is not less than 300kPa, the bearing capacity characteristic value of the strip foundation 1 on the pier 8 is not less than 210kPa, and if the bearing capacity of the foundation 9 does not meet the requirement, the pseudo-ginseng soil can be adopted for replacement.
As a specific implementation manner of the crossing diagonal cast-in-place construction device based on the main beam being a bailey beam, please refer to fig. 1 to 4, the size of the bar foundation 1 is 2000cm × 120cm × 120cm, and the bar foundation 1 is made of cast-in-place C30 concrete.
As a specific implementation manner of the cast-in-place construction equipment of overline skew based on the girder is beiLei beam, please refer to fig. 1 to 4, the thickness of the bamboo plywood is 13-17mm, the cross-sectional dimension of the square timber is 10cm x 10cm, the bamboo plywood fixed connection that is located 6 tip of beiLei beam is on the square timber.
The utility model discloses following beneficial effect has:
the utility model provides a cross line skew cast-in-place construction equipment based on girder is bailey roof beam, can effectively solve under the cross line skew line bailey truss's junction according to 3m or the multiple of 3m can not all be located the difficult problem on the distribution roof beam, the utility model discloses can make bailey truss's junction of bailey roof beam 6 place directly over second distribution roof beam 5 according to 3m or the multiple of 3m, need not establish additional enhancement vertical rib, can make bailey support system atress satisfy the design requirement;
the utility model can solve the problem of inconsistent structural rigidity existing under the arrangement of the Bailey and the full-space support, and optimize the overall performance of the structure by utilizing the large-span continuous Bailey;
the utility model discloses can be applied to the skew and stride across highway, railway and river course construction, alleviate the condition of traffic jam during the construction, can reduce construction cost, be convenient for ann tear open and construction component repeatedly usable.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Cast-in-place construction equipment of overline skew based on girder is bailey roof beam, its characterized in that includes:
the strip foundations are respectively fixed on the bridge piers and the foundation foundations, and the strip foundations fixed on the foundation foundations are arranged along the length direction of the crossing road;
the plurality of upright columns are vertically and fixedly arranged on the strip foundation;
a plurality of sand cylinders are arranged at the upper end of each upright post;
the first distribution beam is fixedly arranged at the upper ends of the sand cylinders, transversely arranged and parallel to the road direction, and used for transmitting the bearing force acting on the first distribution beam to the strip foundation;
the second distribution beam is fixedly arranged at the upper end of the first distribution beam, transversely arranged, and placed in a length direction perpendicular to the length direction of the Bailey beam, and is used for transmitting bearing force acting on the second distribution beam to the first distribution beam;
the Bailey beams are fixedly arranged at the upper ends of the second distribution beams, the Bailey beams are transversely arranged, the joints of the Bailey trusses of the Bailey beams are positioned on the second distribution beams according to multiples of 3m or 3m, the length direction of the Bailey beams is parallel to the connecting line direction of the two piers and is vertical to the length direction of the second distribution beams, and the Bailey beams are used for bearing; and the formwork supporting assembly is erected at the upper end of the Bailey beam to form a formwork support for supporting cast-in-place concrete.
2. The cross-line skew cast-in-place construction device based on the Bailey beam as the main beam of claim 1, wherein a flange is pre-embedded on each strip-shaped foundation, and the upright posts are fixedly connected to the flanges.
3. The cross-line diagonal cast-in-place construction device based on the Bailey beam as the main beam of claim 1, wherein a cross brace is arranged between two adjacent upright columns and used for stabilizing the upright columns, and the cross brace is made of 20b channel steel.
4. The cross-line skew cast-in-place construction device based on bailey beams as main beams according to claim 2, wherein the upright columns are steel tube upright columns, the upright columns are made of phi 530 steel tubes, the lower ends of the upright columns are fixedly arranged on the flange plate, the transverse positioning datum lines of the upright columns are bridge axes, and the longitudinal positioning datum lines of the upright columns are bridge pier center lines.
5. The cast-in-place construction equipment for the crossing diagonal skew based on the Bailey beams as the main beams according to claim 1, wherein the second distribution beams are made of three-piece type 40b I-steel, the spacing module of the second distribution beams is 3m or a multiple of 3m, and the joints of the Bailey trusses on the Bailey beams are supported right above the second distribution beams.
6. The cross-line diagonal cast-in-place construction device based on the Bailey beam as the main beam according to claim 1, wherein the Bailey beam is formed by splicing 321 type Bailey truss pieces, and the connecting part of the Bailey truss of the Bailey beam is positioned right above the distribution beam according to 3m or multiples of 3 m.
7. The cross-line diagonal cast-in-place construction device based on the Bailey beam as the main beam according to claim 1, wherein the formwork assembly is detachably connected to the upper end of the Bailey beam and comprises a plurality of bamboo plywood and a plurality of square timber which are matched and connected with each other, the plurality of square timber are vertically arranged at the end part of the Bailey beam, the plurality of bamboo plywood surrounds a U-shaped structure and is used for cast-in-place concrete pouring, and the plurality of bamboo plywood is fixed on the Bailey beam by means of the square timber.
8. The crossing diagonal cast-in-place construction device based on the Bailey beam as the main beam of claim 1, wherein the bearing capacity of the strip foundation fixed on the foundation is larger than 300kPa, and the bearing capacity of the strip foundation fixed on the pier is larger than 210 kPa.
9. The cross-line diagonal cast-in-place construction device based on the Bailey beam as the main beam of claim 1, wherein the strip foundation has the size of 2000cm x 120cm, and is made of cast-in-place C30 concrete.
10. The cross-line diagonal cast-in-place construction device based on the Bailey beam as the main beam as claimed in claim 7, wherein the thickness of the bamboo plywood is 13-17mm, the cross-sectional dimension of the square timber is 10cm x 10cm, and the bamboo plywood positioned at the end part of the Bailey beam is fixedly connected to the square timber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021407579.0U CN212895944U (en) | 2020-07-16 | 2020-07-16 | Cross-line skew cast-in-place construction device based on main beam being Bailey beam |
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| CN202021407579.0U CN212895944U (en) | 2020-07-16 | 2020-07-16 | Cross-line skew cast-in-place construction device based on main beam being Bailey beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235448A (en) * | 2021-05-31 | 2021-08-10 | 中铁四局集团第四工程有限公司 | Installation method of main line crossing ultrahigh steel pipe column system |
| CN114108493A (en) * | 2021-12-23 | 2022-03-01 | 中铁六局集团天津铁路建设有限公司 | Quick construction method for steel-concrete combined truss girder |
-
2020
- 2020-07-16 CN CN202021407579.0U patent/CN212895944U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235448A (en) * | 2021-05-31 | 2021-08-10 | 中铁四局集团第四工程有限公司 | Installation method of main line crossing ultrahigh steel pipe column system |
| CN113235448B (en) * | 2021-05-31 | 2022-06-21 | 中铁四局集团第四工程有限公司 | Installation method of main line crossing ultrahigh steel pipe column system |
| CN114108493A (en) * | 2021-12-23 | 2022-03-01 | 中铁六局集团天津铁路建设有限公司 | Quick construction method for steel-concrete combined truss girder |
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