CN111472252A - Single-arch-rib framing swivel construction steel box arch bridge and construction method thereof - Google Patents
Single-arch-rib framing swivel construction steel box arch bridge and construction method thereof Download PDFInfo
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- CN111472252A CN111472252A CN202010428819.3A CN202010428819A CN111472252A CN 111472252 A CN111472252 A CN 111472252A CN 202010428819 A CN202010428819 A CN 202010428819A CN 111472252 A CN111472252 A CN 111472252A
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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
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
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Abstract
The invention belongs to the technical field of arch bridge construction, and relates to a single-arch-rib framing swivel construction steel box arch bridge and a construction method thereof, wherein the single-arch-rib framing swivel construction steel box arch bridge comprises a lower rotary table, a panning system, an upper rotary table, two sets of bridge deck longitudinal beams and a vertical swivel hinge, the lower rotary table is fixedly arranged on a foundation, the panning system is fixedly arranged on the lower rotary table, the upper rotary table is fixedly arranged on the panning system, the two sets of bridge deck longitudinal beams are fixed on the upper rotary table, the vertical swivel hinge is arranged on the inner side of the upper rotary table and is used for fixing arch ribs to be constructed, the upper rotary table, the lower rotary table and the arch ribs are arranged in a left-right framing manner, a transverse strut and a transverse beam between the left-right framing arch ribs are arranged, a suspender transverse beam is fixedly arranged between the bridge deck longitudinal beams, suspenders are arranged at equal intervals along the longitudinal direction of each arch rib, the upper end of, the safety risk is reduced, the construction is convenient, and the construction cost is reduced.
Description
Technical Field
The invention belongs to the technical field of arch bridge construction, and relates to a single-arch-rib framing swivel construction steel box arch bridge and a construction method thereof.
Background
With the application of the steel structure on various bridges, the spanning capacity of the bridge is greatly improved, the stability of a bearing structure of the bridge is improved, and the steel box arch is favored by bridge designers with super strong spanning capacity. However, the mountainous terrain is complex and is restricted by various factors such as terrain, climate and geological hydrology, the construction of the arch bridge faces a lot of difficulties, and common construction methods of the arch bridge include a cable hoisting inclined pulling buckling hanging method and a rotating body construction method. The construction technology of the cable hoisting inclined pull buckle hanging method is mature and reliable, but for a fourth soil layer, a strongly weathered broken stratum and a region where karst is relatively developed, the bearing capacity of a foundation is low, a buckle hanging system is limited by geological conditions at two banks, and the arrangement of anchorages is difficult; or due to the limitation of the terrain, the problem that the distance between the anchor spindle and the buckling tower is too short or too long exists, and the stress of the cable crane system is influenced; the cable hoisting overhead working period is long, and the safety risk is high. According to the traditional whole-range swivel construction method, the arch center is positioned on a steep mountain slope, the excavation amount of a whole-range swivel arch center construction mountain is large, the protection is difficult, the stability of the mountain is influenced, and geological disasters are easily induced; the height difference of the corresponding ground lines of the left arch rib and the right arch rib is larger, and a higher bracket needs to be erected for assembling the arch ribs; the lower turntable ring road foundation consumption is large, and the upper turntable needs to be additionally provided with an arch seat connection beam, so that the material consumption is large.
Aiming at the defects of the traditional arch bridge construction, the single-arch rib framing swivel construction steel box arch bridge structure is adopted, according to the bridge site topographic conditions and the bridge structure characteristics, after the single-arch rib is assembled, the single-rib framing swivel closure is carried out in a mode of combining horizontal rotation and vertical rotation, and after the arch rib closure, the arch upper cross brace and the bridge deck longitudinal and transverse beam installation are carried out. The invention solves the problems of difficult arrangement, high safety risk, large arch center excavation amount, difficult protection, large material consumption and the like of the anchorage by a cable hoisting inclined pull buckle hanging method on the steep mountain slope of the V-shaped valley, ensures the construction quality, reduces the safety risk, is convenient to construct and reduces the construction cost.
Disclosure of Invention
In view of the above, the invention provides a single arch rib framing swivel construction steel box arch bridge and a construction method thereof, which are convenient, safe and reliable in construction and low in material investment, and aims to solve the defects of the existing arch bridge construction.
In order to achieve the purpose, the invention provides a single-arch-rib framing swivel construction steel box arch bridge, which comprises a lower rotary table, a panning system, an upper rotary table, two sets of bridge deck longitudinal beams and vertical swivel hinges, wherein the lower rotary table is located on a foundation, the panning system is fixedly installed on the lower rotary table, the upper rotary table is rotatably installed on the panning system, the two sets of bridge deck longitudinal beams are fixed on the upper rotary table, the vertical swivel hinges are installed on the inner side of the upper rotary table and are used for fixing arch ribs to be constructed, the upper rotary table, the lower rotary table and the arch ribs are arranged in a left-right framing mode, crossbeams and cross beams between ribs are arranged between the left-right framing arch ribs, hanger rods are fixedly installed between the bridge deck longitudinal beams, hanger rods are arranged at equal intervals in the longitudinal direction of each arch rib, the upper ends of the hanger rods are anchored to the arch ribs.
Furthermore, the horizontal rotation system between the upper rotary table and the lower rotary table comprises a spherical hinge arranged between the upper rotary table and the lower rotary table and an annular slide rail fixedly arranged on the lower rotary table and convenient for the spherical hinge to move, and a positioning pin shaft is fixedly arranged at the centers of the spherical hinge and the annular slide rail.
Furthermore, the cross beam adopts a truss structure, and the cross beam between the ribs adopts a steel box structure.
Furthermore, abutment is arranged outside the arch seat formed by the arch rib and the bridge deck longitudinal beam, an approach bridge auxiliary arch is connected between each abutment and the corresponding upper rotary table, and a plurality of upright columns are arranged between each approach bridge auxiliary arch and the corresponding bridge deck longitudinal beam, the suspender cross beam and the secondary cross beam.
Further, a bridge deck is laid on the bridge deck framework, and guardrails are installed on two sides of the bridge deck framework.
And further, pouring solid-sealed concrete between the upper turntable and the lower turntable to carry out solid-sealed turntable.
A construction method for constructing a steel box arch bridge by single arch rib framing rotation comprises the following steps:
A. and (3) constructing an upper turntable and a lower turntable: pouring concrete to form a lower rotary table, reserving notches related to the flat turning system on the lower rotary table to finish installation of the flat turning system, pouring concrete in each notch after the installation of the flat turning system is finished, and installing an upper rotary table on the flat turning system;
B. assembling arch ribs: according to the field topographic conditions, a support is erected on an approach bridge abutment or a roadbed behind an arch seat, single arch rib assembly is carried out on the support, and a vertical rotary hinge is arranged at the end part of each arch rib;
C. the arch rib vertically rotates: the assembled arch rib attached to the low bracket is hinged to a designed elevation around a vertical rotation hinge positioned at the arch springing, and after the vertical rotation is in place, the vertical rotation hinge of the arch springing is fixed to form a horizontal rotation system to prepare for horizontal rotation;
D. and (3) horizontally rotating the arch rib: the arch rib adopts the construction of flat rotation without a balance weight, and is not provided with a closure section, after the flat rotation is in place, the butt joint control of the closure section is carried out, the closure of the single arch rib is completed, and simultaneously, the upper and lower turntables are sealed by pouring sealing concrete between the upper and lower turntables;
E. installing a cross brace: after the swivel construction of the left single arch rib and the right single arch rib is completed, the installation construction of the truss cross brace and the cross beam between the ribs is carried out, and the integral stability of the arch bridge is improved;
F. constructing an approach bridge auxiliary arch and upright columns, pouring the approach bridge auxiliary arch after the arch rib rotating body is finished, constructing the upright columns on the approach bridge auxiliary arch, and supporting bridge deck longitudinal beams on the upright columns;
G. installing the bridge deck longitudinal and transverse beams: a crane is adopted to install a suspension rod, a suspension rod cross beam, a secondary cross beam and a bridge deck longitudinal beam to form a bridge deck framework;
H. construction of a bridge deck system: and after the bridge deck longitudinal and transverse beams are installed, installing bridge decks and guardrails, and casting a welding seam between the prefabricated plates of the bridge deck system in a cast-in-place manner.
And further, reserving a ring channel notch and a spherical hinge notch on the lower rotary table in the step A, mounting a ring channel steel plate on the ring channel notch to serve as a ring channel, mounting a spherical hinge on the spherical hinge notch, accurately adjusting the elevation and the position of the ring channel steel plate, pouring concrete in each notch, and performing upper rotary table construction.
The invention has the beneficial effects that:
1. according to the single-arch-rib framing swivel construction steel box arch bridge disclosed by the invention, the single-arch-rib framing swivel construction is realized by adopting the single-arch-rib framing swivel construction steel box arch bridge structure, the excavation construction of a large-square foundation pit on a steep mountain slope is avoided, the protection engineering amount is reduced, the safety risk is reduced, and the construction is convenient and rapid.
2. According to the single-arch-rib framing swivel construction steel box arch bridge disclosed by the invention, the single-arch-rib framing swivel construction arch ribs can be assembled on the approach bridge behind the arch center or the roadbed, and only a small number of low supports need to be erected, so that the problem of overlarge whole rotary table can be effectively solved, and the material consumption is reduced.
3. The single-arch-rib framing swivel construction steel box arch bridge disclosed by the invention changes complex and technically-strong high-altitude and overwater operation into land operation on the shore, can ensure the quality safety of construction, does not influence traffic and navigation under the bridge during construction, and is suitable for bridge construction of an upper-span valley, a river, an existing line and the like.
4. The single-arch-rib framing swivel-construction steel box arch bridge disclosed by the invention has the advantages of simple structure, definite stress and convenience in construction, effectively solves the problems of large arch seat excavation amount, difficulty in protection, large material consumption and the like in the traditional steel box arch construction process, ensures the construction quality, reduces the safety risk, is convenient to construct and reduces the construction cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a front view of a single arch rib framing swivel construction steel box arch bridge of the present invention;
FIG. 2 is a top view of the single arch rib framing swivel construction steel box arch bridge of the present invention;
FIG. 3 is a cross-sectional view taken along line 1-1 of FIG. 1 in accordance with the present invention.
Reference numerals: the bridge deck comprises a lower rotary table 1, a horizontal rotation system 2, an upper rotary table 3, a vertical rotation hinge 4, arch ribs 5, cross braces 6, hanger rods 7, hanger rod cross beams 8, secondary cross beams 9, bridge deck longitudinal beams 10, an approach bridge auxiliary arch 11, intercostal cross beams 12, upright columns 13, bridge abutments 14, a bridge deck framework 15 and solid seal concrete 16.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The single-arch-rib framing swivel construction steel box arch bridge comprises a lower rotary disc 1 which is located on a foundation and also serves as an arch foundation, a swivel system 2 fixedly installed on the lower rotary disc 1, an upper rotary disc 3 rotatably installed on the swivel system 2, two sets of bridge deck longitudinal beams 10 fixed on the upper rotary disc 3, and vertical swivel hinges 4 installed on the inner side of the upper rotary disc 3 and used for fixing arch ribs 5 to be constructed, wherein the vertical swivel hinges 4 are used for lifting and lowering the arch ribs 5 in a vertical plane. The lower rotary table 1 is the foundation of the whole arch bridge, and after the upper arch ribs 5 of the upper rotary table 3 rotate, the upper rotary table 3 and the lower rotary table 1 are sealed by pouring sealing concrete 16.
The flat-turning system 2 between the upper rotary table 3 and the lower rotary table 1 is used for finishing the plane rotation of the arch rib 5, and mainly comprises a spherical hinge arranged between the upper rotary table 3 and the lower rotary table 1 and an annular slide rail fixedly arranged on the lower rotary table 1 and convenient for the movement of the spherical hinge, and a positioning pin shaft is fixedly arranged at the center of the spherical hinge and the annular slide rail. In order to increase the stability of the rotating body and reduce the balance weight, the design of the flat rotating system 2 is mainly based on central support and assisted by loop support. The spherical hinge is the center of rotation of the swivel mechanism and simultaneously bears and transfers the entire weight of the entire swivel structure.
The arch rib 5 is the main bearing structure of arch bridge, and the pre-buried anchor of arch rib 5 lower extreme is in last carousel 3, and upper and lower carousel 1 is as the basis of arch bridge, the horizontal and vertical load of transmission of arch rib 5. Go up carousel 3, lower carousel 1 and arch rib 5 and adopt and control the framing setting, control and set up stull 6 and intercostal crossbeam 12 between the framing arch rib 5, stull 6 adopts truss structure, and intercostal crossbeam 12 adopts the steel case structure. Fixed mounting has jib crossbeam 8 between the bridge floor longeron 10, sets up jib 7 along every arch rib 5 vertical equidistant, and 7 upper ends of jib anchor in arch rib 5, and the lower extreme anchor in jib crossbeam 8 transversely sets up time crossbeam 9 between the jib crossbeam 8, and jib 7, jib crossbeam 8, time crossbeam 9, bridge floor longeron 10 are connected and are formed the lattice system, constitute bridge floor skeleton 15. The bridge deck 15 is paved with bridge deck slabs, and guardrails are arranged on two sides of the bridge deck framework 15. Abutment 14 is arranged on the outer side of an arch seat formed by the arch rib 5 and the bridge deck longitudinal beam 10, an approach bridge auxiliary arch 11 is connected between each abutment 14 and the corresponding upper rotary table 3, and a vertical column 13 is arranged between each approach bridge auxiliary arch 11 and the corresponding bridge deck longitudinal beam 10, the suspender beam 8 and the secondary beam 9 and used for supporting the bridge deck longitudinal beam.
A construction method for constructing a steel box arch bridge by single arch rib framing rotation comprises the following steps:
A. and (3) constructing an upper turntable and a lower turntable: pouring concrete to form a lower turntable 1, reserving a ring channel notch and a spherical hinge notch on the lower turntable 1, mounting a ring channel steel plate on the ring channel notch to be used as a ring channel, mounting a spherical hinge on the spherical hinge notch, accurately adjusting the elevation and the position of the ring channel steel plate, pouring concrete in each notch, and constructing an upper turntable 3;
B. assembling arch ribs: according to the field topographic conditions, a support is erected on an approach bridge abutment 14 or a roadbed behind an arch abutment, single arch ribs 5 are assembled on the support, and vertical rotating hinges 4 are arranged at the end parts of the arch ribs 5;
C. the arch rib vertically rotates: the assembled arch rib 5 attached to the low bracket rotates to a designed elevation around the vertical rotating hinge 4 positioned at the arch springing, and after the vertical rotation is in place, the vertical rotating hinge 4 of the arch springing is fixed to form a flat rotating system to prepare for flat rotating;
D. and (3) horizontally rotating the arch rib: the arch rib 5 is constructed by adopting non-balance-weight horizontal rotation, no closure section is arranged, after the horizontal rotation is in place, butt joint control of the non-closure section is carried out, closure of the single arch rib 5 is completed, and simultaneously, sealing concrete 16 is poured between the upper rotary table and the lower rotary table to seal the upper rotary table and the lower rotary table 1;
E. installing a cross brace: after the swivel construction of the left single arch rib 5 and the right single arch rib 5 is completed, the installation construction of the truss cross brace 6 and the cross beam 12 between the ribs is carried out, and the overall stability of the arch bridge is improved;
F. constructing an approach bridge auxiliary arch and an upright post, pouring an approach bridge auxiliary arch 11 after the rotation of the arch rib 5 is finished, constructing an upright post 13 on the approach bridge auxiliary arch 11, and supporting a bridge deck longitudinal beam on the upright post 13;
G. installing the bridge deck longitudinal and transverse beams: a crane is adopted to install a suspender 7, a suspender crossbeam 8, a secondary crossbeam 9 and a bridge deck longitudinal beam 10 to form a bridge deck framework 15;
H. construction of a bridge deck system: and after the bridge deck longitudinal and transverse beams are installed, installing bridge decks and guardrails, and casting a welding seam between the prefabricated plates of the bridge deck system in a cast-in-place manner.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a single arch rib framing is turned construction steel case arched bridge, a serial communication port, including the lower carousel of sitting on the ground, the flat system of fixed mounting on the carousel down, rotate the last carousel of installing on the flat system, fix two sets of bridge deck longerons on last carousel and install at last carousel inboard and be used for the fixed arch rib of waiting to be under construction's vertical hinge that turns, go up the carousel, lower carousel and arch rib adopt about the framing setting, control and set up stull and intercostal crossbeam between the framing arch rib, fixed mounting has the jib crossbeam between the bridge deck longeron, set up the jib along every arch rib vertically equidistant, jib upper end anchor in arch rib, the lower extreme anchors in the jib crossbeam, set up a plurality of crossbeams between the jib crossbeam, secondary crossbeam, the bridge deck longeron is connected and is formed the lattice system, constitute the bridge floor skeleton.
2. The single-arch rib framing swivel construction steel box arch bridge of claim 1, wherein the flat-turning system between the upper turntable and the lower turntable comprises a spherical hinge arranged between the upper turntable and the lower turntable and an annular slide fixedly arranged on the lower turntable for facilitating movement of the spherical hinge, and a positioning pin is fixedly arranged at the center of the spherical hinge and the annular slide.
3. The single-arch-rib framing swivel-construction steel box arch bridge of claim 1, wherein the wales are of a truss structure, and the cross beams between the ribs are of a steel box structure.
4. The single-arch-rib framing swivel-construction steel box arch bridge of claim 1, wherein the abutment outside the arch seat formed by the arch rib and the bridge deck longitudinal beam is a bridge abutment, an approach bridge auxiliary arch is connected between each bridge abutment and the corresponding upper rotary table, and a plurality of upright columns are arranged between each approach bridge auxiliary arch and the corresponding bridge deck longitudinal beam, the suspender beam and the auxiliary beam.
5. The single-arch-rib framing swivel-construction steel box arch bridge of claim 1, wherein a deck slab is laid on the deck framework, and guardrails are installed on both sides of the deck framework.
6. The single-arch-rib framing swivel-construction steel box arch bridge of claim 1, wherein sealing concrete is poured between the upper turntable and the lower turntable to seal the turntable.
7. A construction method for constructing a steel box arch bridge by single arch rib framing rotation is characterized by comprising the following steps:
A. and (3) constructing an upper turntable and a lower turntable: pouring concrete to form a lower rotary table, reserving notches related to the flat turning system on the lower rotary table to finish installation of the flat turning system, pouring concrete in each notch after the installation of the flat turning system is finished, and installing an upper rotary table on the flat turning system;
B. assembling arch ribs: according to the field topographic conditions, a support is erected on an approach bridge abutment or a roadbed behind an arch seat, single arch rib assembly is carried out on the support, and a vertical rotary hinge is arranged at the end part of each arch rib;
C. the arch rib vertically rotates: the assembled arch rib attached to the low bracket is hinged to a designed elevation around a vertical rotation hinge positioned at the arch springing, and after the vertical rotation is in place, the vertical rotation hinge of the arch springing is fixed to form a horizontal rotation system to prepare for horizontal rotation;
D. and (3) horizontally rotating the arch rib: the arch rib adopts the construction of flat rotation without a balance weight, and is not provided with a closure section, after the flat rotation is in place, the butt joint control of the closure section is carried out, the closure of the single arch rib is completed, and simultaneously, the upper and lower turntables are sealed by pouring sealing concrete between the upper and lower turntables;
E. installing a cross brace: after the swivel construction of the left single arch rib and the right single arch rib is completed, the installation construction of the truss cross brace and the cross beam between the ribs is carried out, and the integral stability of the arch bridge is improved;
F. constructing an approach bridge auxiliary arch and upright columns, pouring the approach bridge auxiliary arch after the arch rib rotating body is finished, constructing the upright columns on the approach bridge auxiliary arch, and supporting bridge deck longitudinal beams on the upright columns;
G. installing the bridge deck longitudinal and transverse beams: a crane is adopted to install a suspension rod, a suspension rod cross beam, a secondary cross beam and a bridge deck longitudinal beam to form a bridge deck framework;
H. construction of a bridge deck system: and after the bridge deck longitudinal and transverse beams are installed, installing bridge decks and guardrails, and casting a welding seam between the prefabricated plates of the bridge deck system in a cast-in-place manner.
8. The construction method of the single-arch-rib framing swivel construction steel box arch bridge of claim 7, wherein in step A, a ring channel notch and a spherical hinge notch are reserved on the lower rotary table, a ring channel steel plate is installed on the ring channel notch to serve as a ring-shaped slide way, a spherical hinge is installed on the spherical hinge notch, the elevation of the ring channel steel plate and the position of the spherical hinge are accurately adjusted, concrete in each notch is poured, and the upper rotary table construction is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010428819.3A CN111472252A (en) | 2020-05-19 | 2020-05-19 | Single-arch-rib framing swivel construction steel box arch bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010428819.3A CN111472252A (en) | 2020-05-19 | 2020-05-19 | Single-arch-rib framing swivel construction steel box arch bridge and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673094A (en) * | 2022-04-28 | 2022-06-28 | 中国十九冶集团有限公司 | Construction method of river-crossing bridge |
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2020
- 2020-05-19 CN CN202010428819.3A patent/CN111472252A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673094A (en) * | 2022-04-28 | 2022-06-28 | 中国十九冶集团有限公司 | Construction method of river-crossing bridge |
| CN114673094B (en) * | 2022-04-28 | 2023-03-21 | 中国十九冶集团有限公司 | Construction method of river-crossing bridge |
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