Cable assembled corrugated steel arch bridge and construction method thereof

Abstract

The invention discloses a cable assembly corrugated steel arch bridge and a construction method thereof.The arch bridge comprises foundations on the two sides and a corrugated steel arch shell structure arranged between the foundations in a spanning mode, a corrugated steel arch shell is composed of at least two corrugated steel arch rings arranged in the bridge width direction, and each corrugated steel arch ring is composed of a plurality of corrugated steel arch plates which are sequentially spliced in the arch direction; each corrugated steel arch plate comprises connecting side plates on the periphery and a steel corrugated plate located in the connecting side plates, a plurality of transverse connecting components are arranged on the steel corrugated plate in the width direction, and the transverse connecting components are fixed to the steel corrugated plate and extend out of the connecting side plates in the bridge width direction, so that the transverse connecting components of the adjacent corrugated steel arch rings are connected in the bridge width direction; and an integral corrugated steel arch shell structure is formed. According to the construction method, the supporting towers are arranged on the two sides of the valley, the valley-spanning main cable is tensioned, the end arch sections and the middle-span arch plates are hoisted in a blocking mode in cooperation with the cable-stayed maintaining system, symmetrical assembling is conducted, and the construction method is suitable for rapid construction of the deep valley corrugated steel arch bridge with the complex terrain.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, and more specifically, to a cable-stayed corrugated steel arch bridge and its construction method. Background Technology

[0002] Corrugated steel arch bridges and corrugated steel arch culverts are a type of composite structure that uses pre-formed corrugated steel plates as the main load-bearing components and shares the load with the surrounding backfill soil to bear vehicle loads. They have advantages such as light weight, high degree of factory prefabrication, short construction period, and relatively low requirements for foundation bearing capacity. They have been applied in highway, railway, and municipal engineering projects for crossing small rivers and ditches, culverts, and small and medium span channels.

[0003] In existing projects, the construction of corrugated steel arch bridges typically involves erecting a full-span scaffold or steel support system under the arch after completing the foundation and arch foot concrete. Then, the corrugated steel arch panels are hoisted and assembled sequentially. Once the complete arch ring is formed and the bridge deck is backfilled or concrete poured, the support system is dismantled. For construction sites with relatively flat terrain and shallow valleys, this method can meet the requirements, but it consumes a large amount of temporary support materials and structural components, involves a significant amount of work in erecting and dismantling the support system, and occupies a large construction site area.

[0004] In mountainous sections with high embankment subgrades, deep valleys, or severe river valley incision, corrugated steel arch bridges have a large arch height when crossing deep valleys, rivers, or existing roads and railways. If traditional full-span scaffolding or large cranes are used for construction, on the one hand, the scaffolding is tall and heavy, requiring high foundation bearing capacity and terrain conditions, increasing the stability of the scaffolding and construction safety risks; on the other hand, the construction site at the bottom of the valley is narrow, making equipment layout and material transportation difficult, often failing to meet the operating conditions of large lifting equipment, significantly increasing construction costs and time, and also having a significant impact on the surrounding ecological environment and the operation of existing railway lines.

[0005] To address the issue of temporary supports during arch bridge construction in deep valleys, some projects have drawn on the experience of concrete arch bridge construction by using cable cranes or cable baskets to lift arch ribs or sections. However, these methods are mostly designed for steel truss arches or concrete arch ribs and do not fully consider the characteristics of corrugated steel arch panels, such as small individual panel size, numerous assembly blocks, the need for a stable temporary working platform at the arch crown, and the collaborative assembly of multiple arch rings. The connection between the cable system and the corrugated steel arch panels also lacks targeted structural design, resulting in difficulties in arch line control and low assembly efficiency during construction. Problems such as large investment in temporary components and complex construction organization still exist.

[0006] Therefore, it is necessary to provide a cable-stayed corrugated steel arch bridge and its construction method that is suitable for valley terrain, can reduce or avoid reliance on high supports and large cranes, and takes into account the overall assembly requirements of multi-arch corrugated steel arch shells, so as to improve the construction safety and efficiency of corrugated steel arch bridges under complex terrain conditions. Summary of the Invention

[0007] This application proposes a cable-stayed corrugated steel arch bridge and its construction method, which solves the problems in the prior art.

[0008] To achieve the above objectives, the technical solution proposed in this application is as follows: In the first aspect, this application provides a construction method for a cable-stayed corrugated steel arch bridge, comprising the following steps: a) Cable system layout: Support towers are set up on both sides of the valley, and cables are tensioned between the support towers to form a cross-valley cable system. A traveling car that can move along the cable is set up on the cable. b) Installation of end arch sections: Using the inclined tie system, the end corrugated steel arch plates on both sides are hoisted to the arch foot position of the foundation, so that the end corrugated steel arch plates are anchored to the foundation concrete to form opposite arch foot sections. c) Cable assembly of the mid-span arch plate: Starting from the arch foot sections on both sides, the mid-span corrugated steel arch plate is hoisted using a cable system. The mid-span corrugated steel arch plate is then spliced ​​with the adjacent corrugated steel arch plates in the arch direction. The assembly is symmetrically advanced from both sides towards the middle of the span, and the first corrugated steel arch ring is formed by closing the arch in the middle of the span. d) Multiple arch rings and transverse connections: At least one second corrugated steel arch ring is assembled on one side of the bridge width direction of the first corrugated steel arch ring, and adjacent corrugated steel arch rings are connected by transverse connecting members, so that multiple corrugated steel arch rings form an integral corrugated steel arch shell structure. e) Dismantling the cable system and bridge deck filling: After the corrugated steel arch shell forms a stable load-bearing system, the cable system and support towers are dismantled, and soil filling and / or concrete pouring are carried out on top of the corrugated steel arch shell to complete the construction of the cable-assembled corrugated steel arch bridge.

[0009] Furthermore, at least two support towers are spaced apart on each side of the valley along the bridge width direction, and several rigid transverse connecting beams are provided between the support towers on the same side. A cross-valley main cable is tensioned between the support towers located opposite each other on both sides of the valley. The cross-valley main cable crosses the valley and is connected between the transverse connecting beams. The position of the cross-valley main cable on each transverse connecting beam can be moved along the bridge width direction and locked at a predetermined position. The cable system includes the transverse connecting beams and the cross-valley main cable.

[0010] Furthermore, the inclined cable retaining system includes several inclined cable retaining cables arranged between two transverse connecting beams on the same side. The upper ends of the inclined cable retaining cables are respectively fixed to the transverse connecting beams at different heights. The lower ends of the inclined cable retaining cables are provided with cable length adjustment lifting point devices. The cable length adjustment lifting point devices are connected to the end corrugated steel arch plates at different heights through hook cables. The inclined cable retaining system is used to hoist and obliquely retain the end corrugated steel arch plates during the end arch section installation step.

[0011] Furthermore, the main cable across the valley includes at least one main cable that crosses the valley along the bridge direction, and at least one trolley that can move along the bridge direction is installed on the main cable. The trolley is connected to the corrugated steel arch plate being hoisted through slings and cable length adjustment lifting point devices.

[0012] Furthermore, the corrugated steel arch plate includes connecting side plates around the perimeter and corrugated steel plates disposed within the connecting side plates. A plurality of the transverse connecting members are arranged along the width direction of the corrugated steel plates and fixed to the corrugated steel plates. The transverse connecting members extend laterally beyond the connecting side plates and are used for transverse connection with adjacent corrugated steel arch plates in the bridge width direction.

[0013] Furthermore, the transverse connecting member is an L-shaped steel member arranged along the width direction of the corrugated steel plate. Multiple through holes are spaced apart on each L-shaped steel member along the bridge width direction. Among the several L-shaped steel members arranged sequentially along the arch direction, the through holes located at the same bridge width position correspond to each other in the arch direction. Reinforcing bars are provided in each corrugated steel arch plate along the arch direction. The reinforcing bars pass through the corresponding through holes in each L-shaped steel member and the through holes on the connecting side plate in sequence. The front end of the reinforcing bar extends out of the connecting side plate and is welded to the end of the reinforcing bar of the adjacent corrugated steel arch plate in the arch direction.

[0014] Furthermore, after the adjacent corrugated steel arch plates are aligned by connecting side plates, they are bolted together through bolt holes provided on the connecting side plates.

[0015] Furthermore, in the dismantling of the cable system and subsequent construction steps, a waterproof layer and an isolation layer are first set on the corrugated steel arch shell before dismantling the cable system, and then the soil is backfilled in layers and compacted, or a concrete filling layer is poured on the corrugated steel arch shell and a bridge deck structure is set.

[0016] Secondly, this application provides a cable-mounted corrugated steel arch bridge, including two foundations arranged at intervals along the bridge direction, and a corrugated steel arch shell structure spanning between the two foundations. The corrugated steel arch shell structure consists of at least two corrugated steel arch rings arranged along the width of the bridge. Each corrugated steel arch ring is composed of several corrugated steel arch plates spliced ​​sequentially in the arch direction. Each corrugated steel arch plate includes connecting side plates arranged around its perimeter and corrugated steel plates arranged within the area enclosed by the connecting side plates. Several transverse connecting members are arranged on each corrugated steel arch plate along the width direction of the corrugated steel plates. The transverse connecting members are fixed to the corrugated steel plates and extend beyond the connecting side plates of the corresponding corrugated steel arch plates in the bridge width direction, so that the transverse connecting members between adjacent corrugated steel arch rings are connected to each other in the bridge width direction, thereby connecting each corrugated steel arch ring into an integral corrugated steel arch shell structure.

[0017] Furthermore, the transverse connecting member is an L-shaped steel member arranged along the width direction of the corrugated steel plate. Each L-shaped steel member has multiple through holes spaced apart along the bridge width direction. Among the L-shaped steel members arranged sequentially along the arch direction, the through holes located at the same bridge width position correspond to each other in the arch direction. A reinforcing bar extending along the arch direction is provided in each corrugated steel arch ring. The reinforcing bar passes through the corresponding through holes in each L-shaped steel member and the through holes on the connecting side plate in sequence, and is welded to the end of the reinforcing bar in the adjacent corrugated steel arch ring in the arch direction, so that the adjacent corrugated steel arch rings form a continuous connection system in the bridge width direction and the arch direction through the L-shaped steel members and the reinforcing bars.

[0018] Compared with the prior art, the beneficial effects of this application are: This application's method employs a cable system consisting of a support tower, a main cable spanning the valley, and a trolley, combined with an end arch section cable-stayed support system. The construction method provided by this application allows for the overall assembly of corrugated steel arch bridges in locations with narrow spaces at the bottom of valleys, large terrain differences, and where conditions for erecting high supports or deploying large lifting equipment are unsuitable. Firstly, the end arch sections are independently hoisted and their attitude controlled via cable-stayed support cables and cable length adjustment devices, enabling precise positioning and reliable anchoring of the end corrugated steel arch panels to the foundation without relying on large-area full-span scaffolding, facilitating fine-tuning and locking of the arch foot alignment. Secondly, the mid-span corrugated steel arch panels utilize a movable system within the bridge width and direction. The cable-stayed crane is used for segmented hoisting and positioning, advancing symmetrically from both sides towards the mid-span starting from the arch foot sections at both ends. Closure is carried out in the reserved closed section at the mid-span, which can reduce the unbalanced internal forces during the construction stage and facilitate the control of the arch line shape and the cumulative error of assembly. Thirdly, after the first corrugated steel arch ring is completed, multiple parallel corrugated steel arch rings are assembled by using transverse connecting components in conjunction with cable hoisting. This allows the arch assembly and bridge width expansion to be carried out in stages. Temporary structures can be reused, reducing the investment in traditional temporary support components such as high supports and corbels, minimizing the disturbance of construction to the bottom of the valley and the surrounding environment, and improving the safety and construction efficiency of corrugated steel arch bridge construction under complex terrain conditions.

[0019] This application's structure, by arranging and fixing transverse connecting members along the width of a corrugated steel plate, and having these transverse connecting members extend beyond the connecting side plate in the bridge width direction, forms an integral corrugated steel arch shell structure combining multiple corrugated steel arch rings with transverse connecting members and reinforcing bars. On one hand, at least two corrugated steel arch rings arranged along the bridge width direction are interconnected by transversely extending L-shaped steel connecting members. Each L-shaped steel member has through-holes arranged along the bridge width direction and corresponding to each other in the arch direction, along with reinforcing bars extending along the arch direction, so that adjacent corrugated steel arch rings form a continuous space in both the bridge width and arch directions. The connection system helps improve the overall stiffness and lateral stability of the corrugated steel arch shell, and improves the stress distribution of the structure under the action of vehicle eccentric loads and construction loads. On the other hand, the corrugated steel arch plates themselves are connected by bolts to the connecting side plates and work together with the transverse connecting members and reinforcing bars, so that each corrugated steel arch plate not only forms a continuous arch ring in the arch direction, but also forms an integral load-bearing shell in the bridge width direction. Under the premise of meeting the load-bearing capacity, it helps to reduce the dependence of a single corrugated steel arch plate on the temporary support system, improve the prefabrication and maintainability of the structure, and is suitable for corrugated steel arch bridge projects with different layout forms such as multi-span and multi-lane.

[0020] Of course, implementing the various technical solutions of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the cable system layout stage in the construction method of cable-assembled corrugated steel arch bridge according to the embodiments of this application; Figure 2 This is a structural schematic diagram of the end arch installation stage according to an embodiment of this application; Figure 3 This is a schematic diagram of the cable assembly stage across the corrugated steel arch in an embodiment of this application; Figure 4 This is a schematic diagram of the multi-arch ring assembly and lateral connection stage in an embodiment of this application; Figure 5 This is a structural schematic diagram of the final completed state of the cable-assembled corrugated steel arch bridge according to an embodiment of this application; Figure 6 This is a schematic diagram of the transverse connection of the corrugated steel arch plate according to an embodiment of this application; Figure 7This is a flowchart of a method embodiment of this application.

[0023] In the diagram, 1-supporting tower, 2-transverse connecting beam, 3-main cable across the valley, 4-traffic trolley, 5-stayed cable, 6-cable length adjustment suspension point device, 7-hook cable, 8-end corrugated steel arch plate, 9-mid-span corrugated steel arch plate, 10-connecting side plate, 11-corrugated steel plate, 12-transverse connecting component, 13-reinforcing steel bar, 14-foundation concrete, 15-suspender cable, 16-bridge deck structure, 17-corrugated steel arch shell structure. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0025] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0026] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0027] Example 1: like Figures 1-7 As shown, this embodiment provides a construction method for a cable-stayed corrugated steel arch bridge, applicable to corrugated steel arch bridge projects spanning deep valleys. Foundation concrete 14 is first constructed on both sides of the construction site to support the subsequent support towers 1 and corrugated steel arch plates.

[0028] During the cable system deployment phase, such as Figure 1As shown, several support towers 1 are respectively set on the foundation concrete 14 on both sides of the valley. The support towers 1 are arranged at intervals in the bridge width direction. The support towers 1 on the same side are rigidly connected by transverse connecting beams 2 to form a stable gantry system. The main cable 3 is tensioned between the support towers 1 located opposite each other on both sides of the valley. The main cable 3 crosses the valley and is supported between the transverse connecting beams 2. A trolley 4 that can move along the bridge direction is arranged on the main cable 3. The trolley 4 is connected to the corrugated steel arch plate to be suspended by several sets of slings 15 with cable length adjustment lifting point devices 6. With the above structure, the hoisting channel covering the entire span can be obtained by only arranging support towers 1 and cable system within the foundation area on both sides. There is no need to build high supports or arrange large lifting equipment at the bottom of the valley, which helps to reduce the disturbance to the valley bottom site and hydrological conditions.

[0029] During the installation stage of the end arch section, such as Figure 2 As shown, several inclined retaining cables 5 are installed between two transverse connecting beams 2 on the same side. The upper ends of the inclined retaining cables 5 are anchored to the transverse connecting beams 2 at different heights, and the lower ends of the inclined retaining cables 5 are equipped with cable length adjustment lifting point devices 6. The cable length adjustment lifting point devices 6 can extend and retract the free length of the inclined retaining cables 5 and lock them at a predetermined length position. The lower ends are respectively hooked to the connection points at different heights of the end corrugated steel arch plates 8 through hook cables 7, forming an inclined retaining system. During construction, the inclined retaining system is used in conjunction with the main cable 3 across the valley to lift the end corrugated steel arch plates 8 from the top of the bank to the designed arch foot position at the foundation concrete 14. By adjusting the cable length of each cable length adjustment lifting point device 6, the vertical and horizontal posture of the end corrugated steel arch plates 8 is adjusted, so that the end corrugated steel arch plates 8 are reliably connected to the reserved anchoring structure on the foundation concrete 14 and the arch foot line is locked, thereby forming oppositely arranged arch foot sections on both sides of the valley. This cable-stayed system can finely adjust and stably maintain the end corrugated steel arch plate 8 without relying on large-area temporary supports, thereby improving the installation accuracy of the arch foot and construction safety.

[0030] In this embodiment, the cable length adjustment lifting point device 6 is preferably a chain-type manual cable length adjustment device, which includes a housing, a sprocket disposed within the housing, and a ratchet self-locking mechanism meshing with the sprocket. A hand chain is provided on the housing, and upper connecting rings connected to the sling 15 or the inclined cable 5 and lower connecting rings connected to the hook cable 7 are respectively provided at the upper and lower ends of the housing. During construction, pulling the hand chain drives the sprocket to rotate, thereby raising and lowering the cable segment connected between the upper and lower connecting rings, thus achieving fine adjustment of the lifting point height, and maintaining cable length stability through the ratchet self-locking mechanism. If necessary, the cable length adjustment lifting point device 6 can also adopt an equivalent structure such as an electric winch mechanism.

[0031] During the cable assembly stage of the mid-span arch slab, such as Figure 3As shown, starting from the arch foot sections already installed on both sides, the corrugated steel arch plate 9 in the middle span is hoisted using the trolley 4 and sling 15 on the main cable 3 across the valley, and positioned piece by piece along the designed arch axis. During the hoisting process, the sling 15 is preferably hung at the transverse connecting member 12 on the corrugated steel arch plate 9. By adjusting the multi-point hanging position 6 and the length of the sling 15, the hoisted corrugated steel arch plate 9 is kept basically horizontal and close to the designed arch line. After being positioned, the corrugated steel arch plate 9 is aligned with the connecting side plate 10 of the adjacent corrugated steel arch plate in the arch direction through the connecting side plate 10, and bolted together using the bolt holes on the connecting side plate 10. The assembly is symmetrically advanced from the arch foot sections on both sides towards the middle of the span, with a closed section reserved in the middle of the span. Finally, the closed section of the corrugated steel arch plate is installed, so that the arch sections on both sides close at the middle of the span to form the first corrugated steel arch ring. By using symmetrical assembly and mid-span closure, the additional internal forces within the arch ring during construction can be reduced, and the cumulative error of the arch line can be adjusted in the closed section, thereby improving the overall arch line forming accuracy.

[0032] In the multi-arch ring and lateral connection stage, such as Figure 4 As shown, after the first corrugated steel arch ring is completed, a second corrugated steel arch ring is assembled on one side of its bridge width direction. The second corrugated steel arch ring is also assembled from the end corrugated steel arch plate 8 and the mid-span corrugated steel arch plate 9 in the same way as described above. Each corrugated steel arch plate 8, 9 includes a connecting side plate 10 arranged around the perimeter and a steel corrugated plate 11 arranged within the area enclosed by the connecting side plate 10. Several transverse connecting members 12 are fixed at intervals along the width direction on the steel corrugated plate 11. The transverse connecting members 12 are preferably L-shaped steel members and extend laterally beyond the connecting side plate 10 of the corresponding corrugated steel arch plate in the bridge width direction. The transverse connecting members 12 arranged sequentially along the arch direction are connected by reinforcing steel bars 13 at the same bridge width position. The transverse connecting members 12 on adjacent corrugated steel arch rings are connected by welding or other means in the bridge width direction through reinforcing steel bars 13, so that the multiple corrugated steel arch rings form an integral corrugated steel arch shell structure 17 in the bridge width direction. The aforementioned transverse connection structure can significantly improve the overall stiffness and lateral stability of the corrugated steel arch shell in the bridge width direction, making the corrugated steel arch bridge more uniformly stressed under vehicle eccentric loading and construction load.

[0033] In one embodiment, to accommodate the assembly of multiple corrugated steel arches, the main cross-valley cable 3 is preferably configured as a single cable whose position can be adjusted in the bridge width direction. The main cross-valley cable 3 is supported between the two support tower groups by cable support members arranged on the transverse connecting beam 2. The cable support members are preferably sliding saddle structures, with their bottoms slidingly engaging with guide rails on the transverse connecting beam 2, allowing them to move in the bridge width direction. Positioning holes are provided on the sliding saddles, and the cable support members can be locked in a predetermined position on the transverse connecting beam 2 by inserting pins. After the main cross-valley cable 3 is connected to the cable support members, it can move as a whole in the bridge width direction along with the cable support members. This allows for flexible adjustment of the working position of the main cross-valley cable 3 in the bridge width direction while maintaining its overall tension, thereby sequentially completing the hoisting and assembly of corrugated steel arches at different bridge width positions. In other embodiments, the main cross-valley cable 3 can also be configured as two or more cables, each fixed to the transverse connecting beam 2 and corresponding to corrugated steel arches at different bridge width positions, for parallel or partitioned assembly of multiple corrugated steel arches.

[0034] During the dismantling of the cable system and subsequent construction phases, such as Figure 5 As shown, after multiple corrugated steel arch rings are connected by transverse connecting members 12 and reinforcing bars 13 to form a stable corrugated steel arch shell, the load on the main cable 3 across the valley is gradually removed, and the trolley 4, suspenders 15, and cable-stayed cables 5 are dismantled. Subsequently, the cable system components such as the support tower 1 and transverse connecting beam 2 are removed, allowing the corrugated steel arch shell to independently bear its own load and subsequent construction loads. Based on this, a waterproof layer and an isolation layer are installed along the bridge direction above the corrugated steel arch shell, followed by layered backfilling and compaction of soil, or a concrete filling layer is poured above the corrugated steel arch shell and a bridge deck structure 16 is installed, such as... Figure 6 The diagram shows the final cable-assembled corrugated steel arch bridge.

[0035] In summary, this embodiment, through the combined application of cable system and cable-stayed system, achieves the segmented hoisting and symmetrical assembly of each corrugated steel arch plate under deep valley conditions, avoiding or significantly reducing the use of high supports and large hoisting equipment, reducing construction risks and engineering costs, and adapting to the rapid construction needs of corrugated steel arch bridges under complex terrain conditions.

[0036] Example 2: like Figure 6 As shown, this embodiment provides a cable-mounted corrugated steel arch bridge structure, including two foundation concrete 14s arranged at intervals along the bridge direction, and a corrugated steel arch shell structure 17 spanning between the two foundation concrete 14s.

[0037] The corrugated steel arch shell structure 17 consists of at least two corrugated steel arch rings arranged along the width of the bridge. Each corrugated steel arch ring is composed of several corrugated steel arch plates sequentially spliced ​​in the arch direction. Each corrugated steel arch plate includes a connecting edge plate 10 arranged around the perimeter and a corrugated steel plate 11 arranged within the area enclosed by the connecting edge plate 10. The corrugated steel plate 11 is arranged in a continuous arch shape in the crest and trough directions to bear the vertical load and work together with the surrounding backfill or concrete. After adjacent corrugated steel arch plates are aligned in the arch direction through their respective connecting edge plates 10, they are bolted together through bolt holes provided on the connecting edge plates 10 to form a continuous corrugated steel arch ring in the arch direction.

[0038] Several transverse connecting members 12 are fixed on the corrugated plate 11 of each corrugated steel arch plate along the width direction. The transverse connecting members 12 are preferably L-shaped steel members arranged along the width direction of the corrugated plate 11. A part of the transverse connecting member 12 is welded or bolted to the corrugated plate 11, and the other part extends beyond the connecting side plate 10 of the corresponding corrugated steel arch plate in the bridge width direction for connecting with the transverse connecting members 12 of the adjacent corrugated steel arch plate in the bridge width direction.

[0039] Multiple through-holes are spaced along the bridge width direction on each L-shaped steel transverse connecting member 12. Among the transverse connecting members 12 arranged sequentially along the arch direction, the through-holes at the same bridge width position correspond to each other in the arch direction. A reinforcing bar 13 extending along the arch direction is provided within each corrugated steel arch ring. The reinforcing bar 13 passes sequentially through the corresponding through-holes in each transverse connecting member 12 and the through-holes on the connecting side plate 10. The end of the reinforcing bar 13 extends beyond the connecting side plate 10 of the adjacent corrugated steel arch ring and is welded to or connected in other ways to the end of the reinforcing bar 13 in the adjacent corrugated steel arch ring in the arch direction. Through the above structure, adjacent corrugated steel arch rings form a continuous connection system in the bridge width direction and the arch direction through the transverse connecting members 12 and the reinforcing bars 13, connecting each corrugated steel arch ring as a whole into a spatial corrugated steel arch shell structure 17.

[0040] A bridge deck structure 16 is installed above the corrugated steel arch shell structure 17. The bridge deck structure 16 can be a combination of a concrete infill layer and a pavement layer, or it can be a reinforced concrete slab with a pavement layer, depending on the project requirements. A waterproof layer and an isolation layer can be installed between the corrugated steel arch shell and the bridge deck structure 16 as needed to improve structural durability and driving comfort. The foundation concrete 14 is connected to the ends of the end corrugated steel arch plates 8 through a pre-embedded anchoring structure to ensure reliable anchoring at both ends of the corrugated steel arch shell.

[0041] Compared with traditional corrugated steel arch structures with a single arch ring or a small number of transverse connecting parts, this embodiment uses a spatial connection system formed by transverse connecting members 12 and reinforcing bars 13 to enable multiple corrugated steel arch rings to work together in the bridge width and arch direction. This significantly improves the overall stiffness and stability of the corrugated steel arch shell in the transverse and torsional directions, which is beneficial for resisting adverse effects such as vehicle eccentric loading, temperature changes and uneven settlement. At the same time, each corrugated steel arch plate is a prefabricated component in the factory, and only requires segmented hoisting and assembly on site using cable assembly methods. The construction process is simple and the assembly speed is fast, making it suitable for promotion and application in mountainous road sections with complex terrain.

[0042] In other embodiments, the cable-mounted corrugated steel arch bridge and its construction method of this application are not limited to the specific values ​​of the number of arch rings, the form of transverse connecting components and the number of main cables mentioned above. For example, under the premise of meeting the requirements of stress and passage, the corrugated steel arch rings set along the width of the bridge can be two, three or more, and the spacing between adjacent arch rings can also be adjusted according to the bridge width and load arrangement; in addition to L-shaped steel, transverse connecting members can also be made of channel steel, I-beam, square steel or stiffening steel plate, etc., as long as they can be arranged along the width of the corrugated steel plate and extend the connecting edge plate in the width of the bridge for reliable connection with adjacent corrugated steel arch plates or adjacent corrugated steel arch rings, they can be regarded as equivalent replacements of the solution in this application; the main cable across the valley can be set as a single main cable, two parallel main cables or multiple graded main cables, and can also be combined according to the span size, lifting weight and construction safety requirements. The number and arrangement of the overhead cranes on the main cable can also be adjusted accordingly to meet the needs of single-point hoisting or multi-point joint hoisting. The above changes do not exceed the scope of the technical solution defined by the claims of this application.

[0043] For those skilled in the art, several improvements and modifications can be made without departing from the principles to which this application pertains, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A cable-stayed corrugated steel arch bridge, characterized in that, It includes foundations on both sides arranged at intervals along the bridge direction, and a corrugated steel arch shell structure spanning between the foundations on both sides; The corrugated steel arch shell structure consists of at least two corrugated steel arch rings arranged along the width of the bridge. Each corrugated steel arch ring is composed of several corrugated steel arch plates spliced ​​sequentially in the arch direction. Each corrugated steel arch plate includes a connecting edge plate arranged around its perimeter and a corrugated steel plate arranged within the area enclosed by the connecting edge plate. Several transverse connecting members are arranged on each corrugated steel arch plate along the width direction of the corrugated steel plate. The transverse connecting members are fixed to the corrugated steel plate and extend beyond the connecting edge plate of the corresponding corrugated steel arch plate in the bridge width direction, so that the transverse connecting members between adjacent corrugated steel arch rings are connected to each other in the bridge width direction, thereby connecting each corrugated steel arch ring into an integral corrugated steel arch shell structure.

2. The cable-mounted corrugated steel arch bridge according to claim 1, characterized in that, The transverse connecting members are L-shaped steel members arranged along the width direction of the corrugated steel plate. Each L-shaped steel member has multiple through holes spaced apart along the bridge width direction. Among the L-shaped steel members arranged sequentially along the arch direction, the through holes located at the same bridge width position correspond to each other in the arch direction. Reinforcing bars extending along the arch direction are provided in each corrugated steel arch ring. The reinforcing bars pass through the corresponding through holes in each L-shaped steel member and the through holes on the connecting side plate in sequence, and are welded to the ends of the reinforcing bars in the adjacent corrugated steel arch rings in the arch direction, so that the adjacent corrugated steel arch rings form a continuous connection system in the bridge width direction and the arch direction through the L-shaped steel members and the reinforcing bars.

3. A construction method for a cable-stayed corrugated steel arch bridge, characterized in that, Includes the following steps: a) Cable system layout: Support towers are set up on both sides of the valley, and cables are tensioned between the support towers to form a cross-valley cable system. A traveling car that can move along the cable is set up on the cable. b) Installation of end arch sections: Using the inclined tie system, the end corrugated steel arch plates on both sides are hoisted to the arch foot position of the foundation, so that the end corrugated steel arch plates are anchored to the foundation concrete to form opposite arch foot sections. c) Cable assembly of the mid-span arch plate: Starting from the arch foot sections on both sides, the mid-span corrugated steel arch plate is hoisted using a cable system. The mid-span corrugated steel arch plate is then spliced ​​with the adjacent corrugated steel arch plates in the arch direction. The assembly is symmetrically advanced from both sides towards the middle of the span, and the first corrugated steel arch ring is formed by closing the arch in the middle of the span. d) Multiple arch rings and transverse connections: At least one second corrugated steel arch ring is assembled on one side of the bridge width direction of the first corrugated steel arch ring, and adjacent corrugated steel arch rings are connected by transverse connecting members, so that multiple corrugated steel arch rings form an integral corrugated steel arch shell structure. e) Dismantling the cable system and bridge deck filling: After the corrugated steel arch shell forms a stable load-bearing system, the cable system and support towers are dismantled, and soil filling and / or concrete pouring are carried out on top of the corrugated steel arch shell to complete the construction of the cable-assembled corrugated steel arch bridge.

4. The construction method for the cable-stayed corrugated steel arch bridge according to claim 3, characterized in that, At least two support towers are spaced apart along the width of the bridge on each side of the valley. Several rigid transverse connecting beams are provided between the support towers on the same side. A cross-valley main cable is tensioned between the support towers located opposite each other on both sides of the valley. The cross-valley main cable crosses the valley and is connected between the transverse connecting beams. The position of the cross-valley main cable on each transverse connecting beam can be moved along the width of the bridge and locked at a predetermined position. The cable system includes the transverse connecting beams and the cross-valley main cable.

5. The construction method for the cable-assembled corrugated steel arch bridge according to claim 3 or 4, characterized in that, The inclined cable retaining system includes several inclined cable retaining cables arranged between two transverse connecting beams on the same side. The upper ends of the inclined cable retaining cables are fixed to the transverse connecting beams at different heights. The lower ends of the inclined cable retaining cables are equipped with cable length adjustment lifting point devices. The cable length adjustment lifting point devices are connected to the end corrugated steel arch plate at different heights through hook cables. The inclined cable retaining system is used to hoist and obliquely retain the end corrugated steel arch plate during the end arch section installation step.

6. The construction method for the cable-assembled corrugated steel arch bridge according to claim 4, characterized in that, The main cable for crossing the valley includes at least one main cable that crosses the valley along the bridge direction. At least one trolley that can move along the bridge direction is installed on the main cable. The trolley is connected to the corrugated steel arch plate being lifted by a sling and a cable length adjustment device.

7. The construction method for the cable-stayed corrugated steel arch bridge according to claim 3, characterized in that, The corrugated steel arch plate includes connecting side plates around the perimeter and corrugated steel plates disposed within the connecting side plates. A plurality of the transverse connecting members are arranged along the width direction of the corrugated steel plates and fixed to the corrugated steel plates. The transverse connecting members extend laterally beyond the connecting side plates and are used for transverse connection with adjacent corrugated steel arch plates in the bridge width direction.

8. The construction method for the cable-stayed corrugated steel arch bridge according to claim 7, characterized in that, The transverse connecting members are L-shaped steel members arranged along the width direction of the corrugated steel plate. Multiple through holes are spaced apart on each L-shaped steel member along the bridge width direction. Among the several L-shaped steel members arranged sequentially along the arch direction, the through holes located at the same bridge width position correspond to each other in the arch direction. Reinforcing bars are provided in each corrugated steel arch plate along the arch direction. The reinforcing bars pass through the corresponding through holes in each L-shaped steel member and the through holes on the connecting side plate in sequence. The front end of the reinforcing bar extends out of the connecting side plate and is welded to the end of the reinforcing bar of the adjacent corrugated steel arch plate in the arch direction.

9. The construction method for the cable-assembled corrugated steel arch bridge according to claim 8, characterized in that, After adjacent corrugated steel arch plates are aligned by connecting side plates, they are bolted together through bolt holes set on the connecting side plates.

10. The construction method for the cable-stayed corrugated steel arch bridge according to claim 3, characterized in that, In the dismantling of the cable system and subsequent construction steps, a waterproof layer and an isolation layer are first set on the corrugated steel arch shell before dismantling the cable system. Then, the soil is backfilled in layers and compacted. Alternatively, a concrete filling layer is poured on the corrugated steel arch shell and a bridge deck structure is set up.

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