CN109457592B - V-shaped canyon long-span railway concrete arch bridge - Google Patents
V-shaped canyon long-span railway concrete arch bridge Download PDFInfo
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- CN109457592B CN109457592B CN201811467294.3A CN201811467294A CN109457592B CN 109457592 B CN109457592 B CN 109457592B CN 201811467294 A CN201811467294 A CN 201811467294A CN 109457592 B CN109457592 B CN 109457592B
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- 239000004567 concrete Substances 0.000 title claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
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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
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The invention discloses a V-shaped canyon long-span railway concrete arch bridge, which comprises a main arch (5), an overhead upright post (9) and a main girder (10), and also comprises a secondary arch (6), a main arch tunnel foundation (7) and a secondary arch tunnel foundation (8); the auxiliary arch (6) is respectively arranged at two ends of the main arch (5), the auxiliary arch tunnel foundation (8) is arranged on the mountain above the main arch tunnel foundation (7), one side arch foot of the auxiliary arch (6) is fixedly connected with the auxiliary arch tunnel foundation (8), and the other side arch foot is fixedly connected with the main arch (5) to form an arch bridge structure on the main arch (5), wherein the auxiliary arch (6) is arranged on the arch bridge structure. The auxiliary arch is adopted to replace the junction pier, the problems of poor stability and insufficient longitudinal rigidity caused by overhigh junction pier and the problem of insufficient longitudinal rigidity when the train is under the action of braking load are avoided, the main arch and the auxiliary arch are both tunnel type foundations, the problems of large mountain excavation amount and difficulty in mountain stability are solved, the engineering amount is saved, and the economical efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a V-shaped canyon long-span railway concrete arch bridge.
Background
The mountain area of China is wide, and is two thirds of the total area of China, most mountain railways are deep in mountain and valley, the terrain is steep, the geology is complex, and the traffic is inconvenient. In order to meet the technical requirements of V-shaped canyons in mountain areas, railway route selection and the like, a large-span railway concrete arch bridge continuously appears.
For constructing a large-span railway concrete arch bridge under the condition of V-shaped valley topography, the mountain body at the arch foot is steep, the traditional method sets up the juncture pier on the arch foot expansion basis, the excavation quantity is extremely large, and the mountain body above the arch foot is unfavorable for stabilizing after the foundation pit is excavated, the mountain is cut along the stable side slope line or the mountain body is reinforced by adopting an anchor rod. The railway concrete arch bridge has high load and high rigidity requirement, the main arch and the upright posts on the main arch are required to meet the stress requirement, and sufficient rigidity is required to be provided, and the main arch generally adopts a large sagittal ratio, for example, the sagittal ratio of several railway bridges in China is 1/4.6-1/4, so that the problem of overhigh boundary piers is brought, and when the span of the main arch exceeds 300m, the height of the boundary piers exceeds 70m. In order to meet the requirements of stability and longitudinal rigidity of the junction pier, the size of the column base is larger, so that the foundation size is further enlarged, the excavation quantity of a foundation pit and the protection engineering quantity of a side slope are increased, and the engineering cost is higher.
Moreover, the existing upper-bearing concrete arch bridge is generally in a truss type, an overhead column type or a solid web type, but for a large-span railway concrete arch bridge, the overhead column type is adopted, the modeling is only focused on the function requirement, the landscape effect is ignored, the novel meaning and the meaning are lacking, and the continuously improved aesthetic requirement is more and more difficult to meet.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a V-shaped canyon long-span railway concrete arch bridge, which adopts an auxiliary arch to replace a junction pier in the prior art, and a special arch structure is formed by arranging the auxiliary arch at arch foot positions at two ends of a main arch, so that the problems of poor stability and insufficient longitudinal rigidity when a train brake load acts due to overhigh junction pier are avoided.
In order to achieve the above purpose, the V-shaped canyon long-span railway concrete arch bridge comprises a main arch, a main girder, a secondary arch, a main arch tunnel foundation and a secondary arch tunnel foundation; wherein, the liquid crystal display device comprises a liquid crystal display device,
the main arch is provided with a plurality of arch upright posts, the arch upright posts are connected with the main beams, the mountain bodies on two sides are internally provided with the main arch tunnel foundation, and the arch feet of the main arch are fixedly connected with the main arch tunnel foundation; and, in addition, the processing unit,
the auxiliary arches are respectively arranged at two ends of the main arch, the auxiliary arch tunnel foundation is arranged on the mountain above the main arch tunnel foundation, one side arch foot of the auxiliary arch is fixedly connected with the auxiliary arch tunnel foundation, the other side arch foot is fixedly connected with the main arch, and the arch crown of the auxiliary arch is connected with the main girder to form an arch bridge structure on the main arch, wherein the arch bridge structure is provided with the auxiliary arch.
Further, the auxiliary arch is a structure combining a straight section and a curved section and at least comprises a first section, a second section, a third section, a fourth section, a fifth section or a sixth section, an auxiliary arch embedded section and a vault concrete pedestal, wherein the auxiliary arch embedded section is arranged above the main arch and the auxiliary arch tunnel foundation, and the vault concrete pedestal is arranged above the last section.
Further, the auxiliary arch embedded sections are fixedly connected with the first sections respectively, each section is directly and fixedly connected with each other in sequence, at least the first section is the straight line section, the last section is a bevel structure, and the rest sections are curve sections.
Further, the auxiliary arch is of a box steel structure.
Further, fixed supports are arranged between the arch crown of the main arch and the arch crown of the auxiliary arch and the main beam, and longitudinal movable supports are arranged at the tops of the rest arch upright posts.
Further, a plurality of supports are arranged above the auxiliary arch, and the auxiliary arch is fixedly connected with the main beam through the supports.
Further, the main arch tunnel foundation and the auxiliary arch tunnel foundation are both located inside the stable side slope line.
Further, the main arch crown and the auxiliary arch crown are positioned on the same horizontal line or the same line longitudinal slope.
Further, the main arch adopts a reinforced concrete main arch structure or a stiff skeleton concrete main arch structure.
Further, beam seams are formed in the main beams at intervals, and the main beams are broken at the beam seams.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) The V-shaped canyon large-span railway concrete arch bridge adopts the auxiliary arch to replace the junction pier in the prior art, and the auxiliary arch is arranged at the arch foot positions at the two ends of the main arch to form a special arch-on-arch structure, so that the problems of poor stability and insufficient longitudinal rigidity when the train braking load acts due to the fact that the junction pier is too high are avoided.
(2) According to the V-shaped canyon long-span railway concrete arch bridge, the main arch and the auxiliary arch are tunnel type foundations, the tunnel type foundations are arranged in the two-bank stable side slope lines, compared with a traditional foundation expanding scheme, the protection engineering of mountain excavation quantity and unstable side slopes above arch feet is greatly reduced, the mountain stability is facilitated, the engineering quantity is saved, and the economy is good.
(3) The V-shaped canyon large-span railway concrete arch bridge is characterized in that fixed supports are arranged between the arch crown of the main arch and the arch crown of the auxiliary arch and the main girder, and longitudinal movable supports are arranged at the tops of the rest arch upright posts, so that the braking force of the train is converted into the axial force of the main arch and the auxiliary arch, and the problem that the longitudinal rigidity is insufficient when the traditional boundary pier scheme is used for braking the train is solved.
(4) According to the V-shaped canyon long-span railway concrete arch bridge, the girder is provided with the girder seams at intervals, and is broken at the girder seams and divided into three, so that the problem of overlarge temperature effect of the long-linked girder bridge can be effectively solved.
(5) The V-shaped canyon large-span railway concrete arch bridge is characterized in that the auxiliary arch is made of a steel structure in a whole-section factory, the self weight is light, the auxiliary arch and the main arch form an arch-up structure, the auxiliary arch is designed into a herringbone structure, the spirit concept of 'people' is shown, the 'people' and the 'people' are connected by the arch, and the social harmony significance is realized. The whole bridge type has smooth modeling and good landscape effect, and provides a concrete arch bridge scheme with attractive modeling and novel structure on the premise of meeting stress.
(6) The method for constructing the auxiliary arch in the V-shaped canyon large-span railway concrete arch bridge adopts the whole section of the cable crane for hoisting and field welding, thereby greatly saving the construction period and improving the construction efficiency of the arch building.
Drawings
FIG. 1 is a schematic view of an overall prior art V-shaped canyon long-span railway concrete arch bridge;
FIG. 2 is an overall schematic view of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a V-shaped canyon long-span railway concrete arch bridge structure in accordance with an embodiment of the invention;
fig. 4 is a schematic view of a secondary arch structure of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a cross-sectional structure of a main arch of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention;
FIG. 6 is a schematic view of a secondary arch section of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention;
fig. 7 is a schematic view of a secondary arch construction of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-boundary piers, 2-primary side slope lines, 3-stable side slope lines, 4-post-excavation side slope lines, 5-main arches, 6-auxiliary arches, 7-main arch tunnel foundations, 8-auxiliary arch tunnel foundations, 9-arch upper upright posts, 10-main beams, 11-steel round pipes, 12-brackets, 13-back buckling cable towers, 14-cables and 15-cable cranes; 601-first section, 602-second section, 603-third section, 604-fourth section, 605-fifth section, 606-sixth section, 607-vault concrete abutment, 608-secondary vault pre-embedded section.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a schematic overall view of a V-shaped canyon long-span railway concrete arch bridge in the prior art, as shown in fig. 1, in the prior art, an arch foot of a main arch 5 is fixedly connected with a stepped expansion foundation excavated in a mountain, a boundary pier 1 is arranged on the stepped expansion foundation, the excavated amount of the mountain is large compared with that of a primary slope line 2 by a slope line 4 after excavation, the bottom surface and the back surface of the stepped expansion foundation are positioned in a stable slope line 3, and the stabilization of the mountain above the arch foot of the main arch 5 is not facilitated after excavation of a foundation pit, and the mountain is required to be cut along the stable slope line 3 or reinforced by an anchor rod.
Fig. 2 is an overall schematic diagram of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the present invention, and as shown in fig. 2, the present invention is applicable to a mountain area V-shaped canyon long-span railway concrete arch bridge with a main span exceeding 200m, and includes a main arch 5, a sub-arch 6, a main arch tunnel foundation 7, a sub-arch tunnel foundation 8, an overhead arch 9, and a main girder 10. Main arch tunnel foundations 7 are arranged in mountain bodies at two ends, arch feet of the main arch 5 are fixedly connected with the main arch tunnel foundations 7, and auxiliary arches 6 are respectively arranged at two ends of the main arch 5. The mountain above the main arch tunnel foundation 7 on two sides is provided with a subsidiary arch tunnel foundation 8, one arch foot of the subsidiary arch 6 is fixedly connected with the subsidiary arch tunnel foundation 8, and the other arch foot is connected with the main arch 5. Unlike the V-shaped canyon long-span railway concrete arch bridge structure of fig. 1, the auxiliary arch 6 is adopted to replace the junction pier 1 in the conventional technology, the mountain is not required to be excavated at the arch foot of the main arch 5 for arranging the junction pier 1, the main arch tunnel foundation 7 and the auxiliary arch tunnel foundation 8 are both positioned in the stable side slope line 3, and as can be seen from the figure, the mountain is not required to be excavated when the tunnel foundation is arranged. According to the V-shaped canyon long-span railway concrete arch bridge, the main arch and the auxiliary arch are tunnel type foundations, the tunnel type foundations are arranged in the two-bank stable side slope lines, compared with a traditional foundation expanding scheme, the protection engineering of mountain excavation quantity and unstable side slopes above arch feet is greatly reduced, and the mountain stability is facilitated, and the engineering quantity is saved.
Further, a plurality of arch upright posts 9 are arranged above the main arch 5 and fixedly connected with the main arch, the lengths of the arch upright posts 9 gradually decrease from two ends to the center, and the top heights of the arch upright posts 9 and the arch of the auxiliary arch 6 are positioned on the same horizontal line or on the same line longitudinal slope. The V-shaped canyon large-span railway concrete arch bridge adopts the auxiliary arch to replace the junction pier in the prior art, and the auxiliary arch is arranged at the arch foot positions at the two ends of the main arch to form a special arch-on-arch structure, so that the problems of poor stability and insufficient longitudinal rigidity when the train braking load acts due to the fact that the junction pier is too high are avoided. The invention discloses a novel railway concrete arch bridge structure based on new railway engineering, which not only meets the stress requirement, but also improves the system rigidity, is favorable for mountain stabilization, saves the engineering quantity and has good economy.
Further, fig. 3 is a system diagram of a V-shaped canyon long-span railway concrete arch bridge structure according to an embodiment of the present invention, as shown in fig. 3, a fixed support is disposed between the arch crown of the main arch 5 and the arch crown of the auxiliary arch 6 and the main beam 10, and the top of the rest of the upright posts 9 on the arch are provided with longitudinal movable supports, so that the braking force of the train is converted into axial forces of the main arch 5 and the auxiliary arch 6, and the problem of insufficient longitudinal rigidity of the conventional boundary pier scheme when the braking load of the train acts is solved. In addition, the girder 10 is provided with girder seams at intervals, and the girder 10 is disconnected at the girder seams and is divided into three groups, so that the problem of overlarge temperature effect of the long-link girder bridge can be effectively solved.
Specifically, fig. 4 is a schematic diagram of a secondary arch structure related to a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention. As shown in fig. 4, the secondary arch 6 includes at least a first segment 601, a second segment 602, a third segment 603, a fourth segment 604, a fifth segment 605 or a sixth segment 606, a primary dome concrete pedestal 607, and a secondary arch pre-buried segment 608. The auxiliary arch pre-buried sections 608 are arranged above the main arch 5 and the auxiliary arch tunnel foundation 8, the auxiliary arch pre-buried sections 608 are respectively and fixedly connected with the first section 601 at the arch foot of the auxiliary arch 6, the second section 602 is respectively and fixedly connected with the first section 601 in sequence, the third section 603 is respectively and fixedly connected with the second section 602, the fourth section 604 is respectively and fixedly connected with the third section 603, the fifth section 605 is respectively and fixedly connected with the fourth section 604, and in sequence, the two sides of the last section are fixedly connected with the last section. In addition, the auxiliary arch 6 is a combined structure of a straight line section and a curve section, the last section is provided with a bevel structure, and a vault concrete pedestal 607 is arranged above the last section. The number of specific segments and the number of straight line segments and curved line segments of the auxiliary arch 6 are determined by the optimal auxiliary arch linearity, the optimal stress conditions of the main arch and the auxiliary arch, the actual transportation conditions and the like which are calculated according to the full bridge structure.
Preferably, the auxiliary arch 6 is made of a steel structure, the whole section is manufactured in a factory, the dead weight is light, the section assembly construction is adopted, the whole section is hoisted by a cable crane, and the construction period is saved by field welding.
Further, fig. 5 is a schematic diagram of a main arch section structure related to a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention. As shown in fig. 5, the cross section of the main arch 5 is a polygonal structure, and preferably, the cross section of the main arch 5 is a rectangular structure. An upper arch column 9 is arranged above the main arch 5, and the upper part of the upper arch column 9 is connected with a main girder 10 through a support, wherein the upper arch column 9 of the arch of the main arch 5 is fixedly connected with the main girder 10, and the rest upper arch columns 9 are movably connected with the main girder 10.
Further, fig. 6 is a schematic diagram of a secondary arch section structure related to a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention. As shown in fig. 6, the sub-arch 6 has a polygonal structure in cross section, preferably, the sub-arch 6 has a quadrangular structure in cross section, and the sub-arch 6 is preferably a steel structure over which a plurality of abutments are provided. The support arranged between the arch crown of the auxiliary arch 6 and the main beam 10 is a fixed support, and the arch crown of the auxiliary arch 6 is fixedly connected with the main beam 10.
Preferably, the main beam 10 adopts a reinforced concrete main arch structure or a stiff skeleton concrete main arch structure, and when the main beam 10 adopts a stiff skeleton concrete combined structure, a steel round tube 11 is arranged inside the main beam.
Fig. 7 is a schematic view of a secondary arch construction of a V-shaped canyon long-span railway concrete arch bridge according to an embodiment of the invention. As shown in fig. 7, in a V-shaped canyon long-span railway concrete arch bridge structure, after the construction of a main arch 5 is completed, the construction of an auxiliary arch 6 is performed while an upper arch column 9 is constructed on the main arch 5, and in combination with fig. 4, the construction method of the auxiliary arch 6 comprises the following steps:
s1: in the upper mountain of the main arch tunnel foundation 7, a subsidiary arch tunnel foundation 8 is arranged, the subsidiary arch tunnel foundation 8 is smaller than the main arch tunnel foundation 7, and the subsidiary arch tunnel foundation 8 is arranged in the stable side slope line 3;
s2: a secondary arch pre-embedded section 608 is arranged on the secondary arch tunnel foundation 8 and the main arch 5;
s3: a transverse and longitudinal staggered bracket 12 is erected at the arch foot of the auxiliary arch 6 and is used for welding and positioning and temporary supporting of the auxiliary arch segment;
s4: the auxiliary arch 6 is made of a steel structure and manufactured in a whole-section factory, and the automobile is transported to a construction site;
s5: the cable crane 15 is arranged on the cable 14 and can slide on the cable 14 when the auxiliary arch 6 is constructed, and the cable crane sequentially conveys the auxiliary arch segments to the designed position from two sides of the arch bridge;
s6: the cable crane 15 is used for sequentially conveying the sections of the auxiliary arch 6 to the design position from the two sides of the main arch 5, and welding is performed until the last section of the auxiliary arch 6 is installed in place;
s7: performing construction of a vault concrete pedestal 607 of a vault of the auxiliary vault 6;
s8: and (5) removing the bracket 12 and continuing the construction of the main beam 10.
The auxiliary arch 6 in the V-shaped canyon long-span railway concrete arch bridge is hoisted by adopting the whole section of the cable crane and welded on site, so that the construction period is greatly saved, and the construction efficiency of the arch building is improved. Meanwhile, the V-shaped canyon large-span railway concrete arch bridge provided by the invention adopts a scientific bridge design concept according to the characteristics of site conditions, traffic functions, landscape requirements and the like, and provides a concrete arch bridge scheme with attractive appearance and novel structure on the premise of meeting stress. The auxiliary arch 6 and the main arch 5 form an arch-up arch structure, the auxiliary arch 6 is designed into a herringbone structure, the spirit concept of 'people' is shown, and 'people' are connected by arches, so that the social harmony has the meaning. The whole bridge type modeling is stretched smoothly, and has a good landscape effect.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The V-shaped canyon long-span railway concrete arch bridge comprises a main arch (5) and a main girder (10), and is characterized by further comprising a secondary arch (6), a main arch tunnel foundation (7) and a secondary arch tunnel foundation (8); wherein, the liquid crystal display device comprises a liquid crystal display device,
a plurality of overhead upright posts (9) are arranged on the main arch (5), the overhead upright posts (9) are connected with the main beams (10), the main arch tunnel foundations (7) are arranged in mountain bodies on two sides, and arch feet of the main arch (5) are fixedly connected with the main arch tunnel foundations (7); and, in addition, the processing unit,
the auxiliary arch is characterized in that auxiliary arches (6) are respectively arranged at two ends of the main arch (5), the auxiliary arch tunnel foundation (8) is arranged on the mountain above the main arch tunnel foundation (7), one arch foot of the auxiliary arch (6) is fixedly connected with the auxiliary arch tunnel foundation (8), the arch foot of the other side is fixedly connected with the main arch (5), and the arch crown of the auxiliary arch (6) is connected with the main beam (10) to form an arch bridge structure of the auxiliary arch (6) arranged on the main arch (5).
2. The V-shaped canyon long span railway concrete arch bridge according to claim 1, wherein the secondary arch (6) is a combination of straight segments and curved segments, and comprises at least a first segment (601), a second segment (602), a third segment (603), a fourth segment (604), a fifth segment (605) and a sixth segment (606), and a secondary arch pre-buried section (608) and a vault concrete pedestal (607), the secondary arch pre-buried section (608) being disposed above the main arch (5) and the secondary arch tunnel foundation (8), and the vault concrete pedestal (607) being disposed above the final segment.
3. The V-shaped canyon long span railway concrete arch bridge according to claim 2, wherein said secondary arch pre-buried sections (608) are fixedly connected to said first section (601) respectively, each section in turn being directly fixedly connected to each other, at least said first section (601) being said straight section, the last section being a dog-ear structure, the remaining sections being said curved sections.
4. A V-shaped isthmus long span railway concrete arch bridge according to any of claims 1-3, characterized in that the secondary arch (6) is a box steel structure.
5. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, characterized in that a fixed abutment is provided between the arch of the main arch (5) and the arch of the auxiliary arch (6) and the main girder (10), the rest of the upper arch posts (9) being provided with longitudinal movable abutments at the top.
6. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, characterized in that a plurality of abutments are provided above said secondary arch (6), said secondary arch (6) being fixedly connected to said main girder (10) by means of said abutments.
7. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, characterized in that the main arch tunnel foundation (7) and the auxiliary arch tunnel foundation (8) are both located inside the stabilizing slope line (3).
8. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, wherein the primary arch (5) arch is level with the secondary arch (6) arch or on the same line longitudinal slope.
9. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, characterized in that the main arch (5) is a reinforced concrete main arch structure or a stiff skeleton concrete main arch structure.
10. A V-shaped canyon long span railway concrete arch bridge according to any of claims 1-3, characterized in that the girders (10) are arranged at a distance apart with girder slits, at which slits the girders (10) are broken.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811467294.3A CN109457592B (en) | 2018-12-03 | 2018-12-03 | V-shaped canyon long-span railway concrete arch bridge |
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| CN201811467294.3A CN109457592B (en) | 2018-12-03 | 2018-12-03 | V-shaped canyon long-span railway concrete arch bridge |
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| CN112482225B (en) * | 2020-11-16 | 2022-08-26 | 贵州路桥集团有限公司 | Arch bridge arch center excavation construction method |
| CN115404754B (en) * | 2022-10-31 | 2023-01-17 | 湖南省交通规划勘察设计院有限公司 | Bridge applied to canyon with medium width and construction method |
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