Double-layer steel-concrete combined arch bridge

Abstract

The utility model provides a double-layer steel-concrete combined arch bridge, which belongs to the technical field of corrugated steel and comprises two foundations, an inner arched corrugated steel structure, an outer arched corrugated steel structure, a plurality of shear force pieces, a reinforcing mesh and filling materials. The foundations are installed on the two sides of a crossing area, and the two ends of the inner arched corrugated steel structure are fixedly installed on the two foundations respectively. The outer arched corrugated steel structure is installed above the inner arched corrugated steel structure, and the two ends of the outer arched corrugated steel structure are fixedly installed on the two foundations respectively. A reinforcing cavity is formed between the outer arched corrugated steel structure and the inner arched corrugated steel structure; the shear force piece is installed in the reinforcing cavity and fixedly connected with the outer arched corrugated steel structure or the inner arched corrugated steel structure. The reinforcing mesh is installed in the reinforcing cavity, and the filling material is poured in the reinforcing cavity and fixedly connected with the outer arched corrugated steel structure, the inner arched corrugated steel structure, the shear force piece and the reinforcing mesh. The double-layer reinforced concrete combined arch bridge provided by the utility model has good rigidity, strength, bearing characteristic and the like.

Description

Technical Field

[0001] This utility model belongs to the field of corrugated steel technology, and more specifically, it relates to a double-layer steel-concrete composite arch bridge. Background Technology

[0002] Corrugated steel sheets have strong resistance to deformation, are quick and easy to install, saving construction time, and also have advantages such as low cost and environmental friendliness. They are widely used in transportation and municipal engineering projects for constructing culverts, tunnels, underground passages, and underground pipelines. With the increasing application and changing environment, the load-bearing capacity requirements for arch bridges made of corrugated steel are also increasing. This increased load-bearing capacity necessitates increasing the sheet thickness or structural reinforcement, thus requiring new corrugated steel sheet structures to enhance the load-bearing capacity of arch bridges. Utility Model Content

[0003] The purpose of this invention is to provide a double-layer steel-concrete composite arch bridge to solve the technical problem that the arch bridge structure itself needs to have high load-bearing capacity in the existing technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a double-layer steel-concrete composite arch bridge, comprising:

[0005] The base consists of two units, one for installation on each side of the spanning area;

[0006] An inner arched corrugated steel structure is used for installation above the spanning area, with both ends fixedly installed on the two foundations mentioned above;

[0007] An outer arched corrugated steel structure is used to be installed above the inner arched corrugated steel structure, and both ends are fixedly installed on the two foundations respectively; the outer arched corrugated steel structure and the inner arched corrugated steel structure are arranged at intervals to form a reinforcing cavity;

[0008] Multiple shear members are installed in the reinforcing cavity and are used to be fixedly connected to the outer arched corrugated steel structure or the inner arched corrugated steel structure.

[0009] A reinforcing mesh is installed in the reinforcing cavity and arranged in a conformal manner within the reinforcing cavity; the reinforcing mesh is fixedly connected to the shear member;

[0010] The filling material is poured into the reinforcing cavity and is fixedly connected to the outer arched corrugated steel structure, the inner arched corrugated steel structure, the shear member, and the reinforcing mesh.

[0011] In one possible implementation, the shear members are divided into two groups and are fixedly connected to the outer arched corrugated steel structure and the inner arched corrugated steel structure, respectively; the shear members are installed in the troughs of the outer arched corrugated steel structure and the inner arched corrugated steel structure near the reinforcing cavity.

[0012] In one possible implementation, a connecting sleeve is provided in the trough of the inner arched corrugated steel structure, and an mounting hole coaxially aligned with the connecting sleeve and a bolt installed in the mounting hole are provided on the outer wall; the connecting sleeve has an internal thread, and the shear member has an external thread that mates with the internal thread; the bolt passes through the mounting hole from the outside of the inner arched corrugated steel structure and is threadedly connected to the connecting sleeve for fixing the connecting sleeve and the inner arched corrugated steel structure.

[0013] In one possible implementation, the outer wall of the outer arched corrugated steel structure is provided with mounting holes and nuts corresponding to the troughs. One end of the shear member passes through the mounting hole and is provided with external threads. The nut passes through the outer side of the outer arched corrugated steel structure and is threadedly connected to the shear member for fixing the shear member and the outer arched corrugated steel structure.

[0014] In one possible implementation, the outer arched corrugated steel structure includes a plurality of corrugated steel plates arranged at intervals along the axial direction, with an installation spacing between two adjacent corrugated steel plates. The double-layer steel-concrete composite arch bridge also includes a plurality of telescopic structures, which are respectively installed within the installation spacing between two adjacent corrugated steel plates.

[0015] In one possible implementation, the telescopic structure includes:

[0016] Two annular sealing plates are fixedly installed on both sides of the installation spacing and are fixedly connected to the corresponding ends of the corrugated steel plates and the inner arched corrugated steel structure.

[0017] An annular corrugated plate is installed between two annular sealing plates, and its two ends are fixedly connected to the two annular sealing plates respectively; the two annular sealing plates, the annular corrugated plate and the inner arched corrugated steel structure form a filling cavity;

[0018] A cushioning material is filled into the filling cavity.

[0019] In one possible implementation, the corrugated steel plate has an end flange at its end for engaging with the annular corrugated plate, and the annular sealing plate has an annular mounting plate on its inner wall for engaging with the inner arched corrugated steel structure, and the annular mounting plate is perpendicular to the annular sealing plate; the end flange and the annular corrugated plate, and the inner arched corrugated steel structure and the annular mounting plate are all fixedly connected by multiple fasteners.

[0020] In one possible implementation, a plurality of reinforcing ribs are provided between the annular sealing plate and the annular mounting plate.

[0021] In one possible implementation, the wavelength and amplitude of the annular corrugated plate are both smaller than the wavelength and amplitude of the outer arched corrugated steel structure and the inner arched corrugated steel structure.

[0022] In one possible implementation, the foundation is provided with two sets of anchor connectors, and the two ends of the inner arched corrugated steel structure and the outer arched corrugated steel structure are respectively fixedly connected to the two sets of anchor connectors.

[0023] The beneficial effects of the double-layer steel-concrete composite arch bridge provided by this utility model are as follows: Compared with the prior art, the double-layer steel-concrete composite arch bridge of this utility model first sets foundations on both sides of the spanning area, and the foundations extend along the length direction of the spanning area; an inner arch corrugated steel structure is first installed above the foundations on both sides, and the two ends of the inner arch corrugated steel structure are fixed to the two foundations respectively, and multiple shear members and steel mesh are installed on the inner arch corrugated steel structure, and the steel mesh is fixedly connected to the shear members; multiple shear members are installed on the outer arch corrugated steel structure, and the outer arch corrugated steel structure and shear members are installed... Above the inner arched corrugated steel structure, a certain distance is maintained between the outer arched corrugated steel structure and the inner arched corrugated steel structure to form a reinforcing cavity. Then, the two ends of the outer arched corrugated steel structure are fixed to two foundations respectively, thus forming the main structure of the double-layer steel-concrete composite arch bridge. Then, filling material is poured into the reinforcing cavity. After the filling material fills the reinforcing cavity and cures, it forms a whole with the outer arched corrugated steel structure, the inner arched corrugated steel structure, the shear member and the steel mesh to jointly bear the external load, so that the double-layer steel-concrete composite arch bridge has good stiffness, strength and load-bearing characteristics. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of a double-layer steel-concrete composite arch bridge provided in an embodiment of the present utility model;

[0026] Figure 2 A partial sectional view of a double-layer steel-concrete composite arch bridge provided for an embodiment of this utility model;

[0027] Figure 3 A partial sectional view of a double-layer steel-concrete composite arch bridge with installation spacing provided for an embodiment of this utility model;

[0028] Figure 4 A partial sectional view of a double-layer steel-concrete composite arch bridge with a telescopic structure provided in an embodiment of this utility model;

[0029] Figure 5 Schematic diagram of the structure of the foundation and anchor connector provided in the embodiments of this utility model Figure 1 ;

[0030] Figure 6 Schematic diagram of the structure of the foundation and anchor connector provided in the embodiments of this utility model Figure 2 .

[0031] The following are the labeling elements in the figure:

[0032] 1. Foundation; 11. Anchor connectors; 2. Inner arched corrugated steel structure; 21. Reinforcing cavity; 22. Connecting sleeve; 23. Bolts; 3. Outer arched corrugated steel structure; 31. Nuts; 32. Corrugated steel plate; 33. Installation spacing; 34. End flange; 35. Cast-in-place pipe; 4. Shear member; 5. Reinforcing mesh; 6. Filling material; 7. Expansion joint; 71. Annular sealing plate; 72. Annular corrugated plate; 73. Filling cavity; 74. Buffer material; 75. Annular mounting plate; 76. Reinforcing ribs. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Please see Figures 1 to 6 This invention provides a description of a double-layer steel-concrete composite arch bridge. A double-layer steel-concrete composite arch bridge includes a foundation 1, an inner arched corrugated steel structure 2, an outer arched corrugated steel structure 3, shear members 4, a reinforcing mesh 5, and filling material 6. Two foundations 1 are installed on either side of the spanning area. The inner arched corrugated steel structure 2 is installed above the spanning area, with both ends fixedly mounted on the two foundations 1. The outer arched corrugated steel structure 3 is installed above the inner arched corrugated steel structure 2, with both ends fixedly mounted on the two foundations 1. The outer arched corrugated steel structure 3 and the inner arched corrugated steel structure 2 are arranged at intervals to form a reinforcing cavity 21; there are multiple shear members 4, all of which are installed in the reinforcing cavity 21 and are used to fix them to the outer arched corrugated steel structure 3 or the inner arched corrugated steel structure 2; the reinforcing mesh 5 is installed in the reinforcing cavity 21 and is arranged in a conformal manner within the reinforcing cavity 21; the reinforcing mesh 5 is fixedly connected to the shear members 4; the filling material 6 is poured into the reinforcing cavity 21 and is fixedly connected to the outer arched corrugated steel structure 3, the inner arched corrugated steel structure 2, the shear members 4 and the reinforcing mesh 5.

[0038] The double-layer steel-concrete composite arch bridge provided by this utility model, compared with the prior art, firstly sets up foundations 1 on both sides of the spanning area, with the foundations 1 extending along the length of the spanning area; then, an inner arched corrugated steel structure 2 is installed above the foundations 1 on both sides, with both ends of the inner arched corrugated steel structure 2 fixed to the two foundations 1 respectively, and multiple shear members 4 and steel mesh 5 are installed on the inner arched corrugated steel structure 2, with the steel mesh 5 fixedly connected to the shear members 4; finally, multiple shear members 4 are installed on the outer arched corrugated steel structure 3, and the outer arched corrugated steel structure 3 and shear members 4 are installed on the inner arched corrugated steel structure. Above 2, a certain distance is maintained between the outer arched corrugated steel structure 3 and the inner arched corrugated steel structure 2 to form a reinforcing cavity 21. Then, the two ends of the outer arched corrugated steel structure 3 are fixed to the two foundations 1 respectively, thus forming the main structure of the double-layer steel-concrete composite arch bridge. Then, filling material 6 is poured into the reinforcing cavity 21. The reinforcing cavity 21 is filled with filling material 6 and after curing, it forms a whole with the outer arched corrugated steel structure 3, the inner arched corrugated steel structure 2, the shear member 4 and the steel mesh 5 to jointly bear the external load, so that the double-layer steel-concrete composite arch bridge has good stiffness, strength and load-bearing characteristics.

[0039] Preferably, the filling material 6 is self-compacting concrete. A pouring pipe 35 is installed on the outer arched corrugated steel structure 3, with one end of the pouring pipe 35 connected to the reinforcing cavity 21. Therefore, the pouring operation of the filling material 6 can be completed quickly using the pouring pipe 35. The double-layer steel-concrete composite arch bridge also includes two sealing baffles, respectively installed at both ends along the axial direction of the double-layer steel-concrete composite arch bridge, used to seal the reinforcing cavity 21.

[0040] Please see Figures 2 to 4 In one specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, multiple shear members 4 are divided into two groups and are fixedly connected to the outer arch corrugated steel structure 3 and the inner arch corrugated steel structure 2, respectively. The shear members 4 are installed in the troughs of the outer arch corrugated steel structure 3 and the inner arch corrugated steel structure 2 near the reinforcing cavity 21. That is, multiple shear members 4 are installed on both the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3, and one end of the shear member 4 is fixed to the inner arch corrugated steel structure 2 or the outer arch corrugated steel structure 3, while the other end extends towards the reinforcing cavity 21, thereby making the shear resistance of the entire double-layer steel-concrete composite arch bridge stronger and the shear resistance uniform. The shear members 4 located on the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3 are arranged alternately at intervals, making the arrangement of multiple shear members 4 more uniform and effective.

[0041] Please see Figures 2 to 4As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, a connecting sleeve 22 is provided in the trough of the inner arch corrugated steel structure 2. The outer wall is provided with a mounting hole coaxially aligned with the connecting sleeve 22 and a bolt 23 installed in the mounting hole. The connecting sleeve 22 is provided with an internal thread, and the shear member 4 is provided with an external thread that mates with the internal thread. The bolt 23 passes through the mounting hole from the outside of the inner arch corrugated steel structure 2 and is threadedly connected to the connecting sleeve 22 to fix the connecting sleeve 22 and the inner arch corrugated steel structure 2. The connecting sleeve 22 is fixed in the trough of the inner arch corrugated steel structure 2 and is arranged vertically. The connecting sleeve 22 is coaxially aligned with the mounting hole on the inner arch corrugated steel structure 2. The connecting sleeve 22 is fixed from the outside of the inner arch corrugated steel structure 2 by using the bolt 23 to pass through the mounting hole, while the shear member 4 is connected to the connecting sleeve 22 from above the inner arch corrugated steel structure 2 by the external thread.

[0042] Please see Figures 2 to 4 As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, the outer wall of the outer arch corrugated steel structure 3 is provided with mounting holes and nuts 31 corresponding to the troughs. One end of the shear member 4 is inserted into the mounting hole, and the shear member 4 is provided with external threads. The nut 31 passes through the outside of the outer arch corrugated steel structure 3 and is threadedly connected to the shear member 4 to fix the shear member 4 and the outer arch corrugated steel structure 3. The end of the shear member 4 with the external thread section passes through the mounting hole from below the outer arch corrugated steel structure 3 and is located above the outer arch corrugated steel structure 3. Then, the nut 31 is screwed onto the shear member 4 to lock the shear member 4 onto the outer arch corrugated steel structure 3.

[0043] Please see Figure 3 and Figure 4 As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, the outer arch corrugated steel structure 3 includes a plurality of corrugated steel plates 32 arranged at intervals along the axial direction. An installation spacing 33 is provided between two adjacent corrugated steel plates 32. The double-layer steel-concrete composite arch bridge also includes a plurality of telescopic structures 7, which are respectively installed in the installation spacing 33 between two adjacent corrugated steel plates 32. Since an installation spacing 33 is provided between two adjacent corrugated steel plates 32, telescopic structures 7 can be installed in all of the installation spacing 33. Thus, the double-layer steel-concrete composite arch bridge has certain telescopic characteristics and can adapt to temperature changes and uneven settlement of the foundation 1.

[0044] Please see Figure 3 and Figure 4As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, the telescopic structure 7 includes annular sealing plates 71, annular corrugated plates 72, and buffer material 74. There are two annular sealing plates 71, which are fixedly installed on both sides of the installation spacing 33 and fixedly connected to the ends of the corresponding corrugated steel plates 32 and the inner arched corrugated steel structure 2. The annular corrugated plates 72 are installed between the two annular sealing plates 71, and their two ends are fixedly connected to the two annular sealing plates 71 respectively. The two annular sealing plates 71, the annular corrugated plates 72, and the inner arched corrugated steel structure 2 form a filling cavity 73. The buffer material 74 is filled in the filling cavity 73. The installation spacing 33 is separated from the reinforcing cavities 21 on both sides by the two annular sealing plates 71, and the annular corrugated plates 72 are fixedly installed between the two corrugated steel plates 32, so that the annular corrugated plates 72, the two annular sealing plates 71, and the inner arched corrugated steel structure 2 form a filling cavity 73, and the buffer material 74 is filled in the filling cavity 73. When uneven settlement occurs in foundation 1, the deformation characteristics of the expansion and contraction structure 7 ensure that the arch bridge itself is less affected.

[0045] Please see Figure 3 and Figure 4 As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, the end of the corrugated steel plate 32 is provided with an end flange 34 for connecting with the annular corrugated plate 72, and the inner wall of the annular sealing plate 71 is provided with an annular mounting plate 75 for connecting with the inner arched corrugated steel structure 2, and the annular mounting plate 75 is perpendicular to the annular sealing plate 71; the end flange 34 and the annular corrugated plate 72, and the inner arched corrugated steel structure 2 and the annular mounting plate 75 are all fixedly connected by multiple fasteners; when two annular sealing plates 71 are installed on two corrugated steel plates 32, the annular sealing plates 71 are connected to the end flange 34 and fixed with bolts 23; while the annular mounting plate 75 on the annular sealing plate 71 is connected to the inner arched corrugated steel structure 2 and fixedly connected with bolts 23; in this way, the annular sealing plate 71 is fixedly connected to both the corrugated steel plate 32 and the inner arched corrugated steel structure 2.

[0046] Please see Figure 3 and Figure 4 As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, a plurality of reinforcing ribs 76 are provided between the annular sealing plate 71 and the annular mounting plate 75; the reinforcing ribs 76 increase the strength of the annular sealing plate 71 to ensure that the telescopic structure 7 is stable and reliable in use.

[0047] Please see Figure 3 and Figure 4As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, the wavelength and amplitude of the annular corrugated plate 72 are smaller than those of the outer arch corrugated steel structure 3 and the inner arch corrugated steel structure 2; therefore, when the foundation 1 settles, the annular corrugated plate 72, as the expansion and contraction structure 7, is more likely to deform and adapt to the changes caused by the settlement of the foundation 1.

[0048] Please see Figure 1 , Figure 5 and Figure 6 As a specific embodiment of the double-layer steel-concrete composite arch bridge provided by this utility model, two sets of anchor connectors 11 are provided on the foundation 1. The two ends of the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3 are respectively fixedly connected to the two sets of anchor connectors 11. The anchor connectors 11 can be pre-fixed in the foundation 1, and the upper end of the anchor connectors 11 is located above the foundation 1. Both ends of the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3 are provided with connecting components. When the two ends of the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3 are respectively connected to the foundation 1, the anchor connectors 11 are connected to the connecting components at the upper end of the inner arch corrugated steel structure 2 and the outer arch corrugated steel structure 3, and then fixed with nuts 31, etc.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-layer steel-concrete composite arch bridge, characterized in that, The utility model relates to a double-layer steel and concrete combined arch bridge, which comprises: a foundation, two in number, for installation on both sides of the spanning area; an inner arched corrugated steel structure for installation above the spanning area and fixedly installed at both ends on the two foundations; an outer arched corrugated steel structure for installation above the inner arched corrugated steel structure and fixedly installed at both ends on the two foundations; the outer arched corrugated steel structure is arranged at intervals with the inner arched corrugated steel structure to form a reinforcing cavity; a plurality of shear members, each of which is installed in the reinforcing cavity and used for fixed connection with the outer arched corrugated steel structure or the inner arched corrugated steel structure; a steel mesh installed in the reinforcing cavity and arranged in the reinforcing cavity in a shape-following manner; the steel mesh is fixedly connected with the shear members; a filling material poured into the reinforcing cavity and fixedly connected with the outer arched corrugated steel structure, the inner arched corrugated steel structure, the shear members and the steel mesh; the outer arched corrugated steel structure comprises a plurality of corrugated steel plates arranged at intervals along an axial direction, and an installation interval is arranged between two adjacent corrugated steel plates; the double-layer steel and concrete combined arch bridge further comprises a plurality of expansion structures, and each of the expansion structures is installed in the installation interval between two adjacent corrugated steel plates.

2. The double-layer steel-concrete composite arch bridge according to claim 1, characterized in that, The plurality of shear members are divided into two groups and fixedly connected with the outer arched corrugated steel structure and the inner arched corrugated steel structure respectively; the shear members are installed in valleys of the outer arched corrugated steel structure and the inner arched corrugated steel structure close to the reinforcing cavity.

3. The double-layer steel-concrete composite arch bridge according to claim 2, characterized in that, A connecting sleeve is arranged in the valley of the inner arched corrugated steel structure, an outer wall of the connecting sleeve is provided with a mounting hole coaxially aligned with the connecting sleeve and a bolt installed in the mounting hole, an inner thread is arranged in the connecting sleeve, an outer thread is arranged on the shear member and matched with the inner thread, and the bolt is threadedly connected with the connecting sleeve from the outside of the inner arched corrugated steel structure through the mounting hole, so as to fixedly connect the connecting sleeve and the inner arched corrugated steel structure.

4. The double-layer steel-concrete composite arch bridge of claim 2, wherein An outer wall of the outer arched corrugated steel structure is provided with a mounting hole corresponding to the valley and a nut, one end of the shear member is arranged in the mounting hole, an outer thread is arranged on the shear member, and the nut is threadedly connected on the shear member from the outside of the outer arched corrugated steel structure, so as to fixedly connect the shear member and the outer arched corrugated steel structure.

5. The double-layered steel-concrete composite arch bridge according to claim 1, wherein The expansion structure comprises: two annular blocking plates fixedly installed on both sides of the installation interval and fixedly connected with the end of the corresponding corrugated steel plate and the inner arched corrugated steel structure; an annular corrugated plate installed between the two annular blocking plates and fixedly connected at both ends with the two annular blocking plates; the two annular blocking plates, the annular corrugated plate and the inner arched corrugated steel structure enclose a filling cavity; a buffer material filled in the filling cavity.

6. The double-layer steel-concrete composite arch bridge according to claim 5, characterized in that, The end of the corrugated steel plate is provided with an end flange for abutting against the annular corrugated plate, the inner wall of the annular sealing plate is provided with an annular mounting plate for abutting against the inner arched corrugated steel structure, and the annular mounting plate is perpendicular to the annular sealing plate; the end flange, the annular corrugated plate, the inner arched corrugated steel structure and the annular mounting plate are fixedly connected through a plurality of fasteners.

7. The double-layer steel-concrete composite arch bridge according to claim 6, characterized in that, A plurality of reinforcing rib plates are arranged between the annular sealing plate and the annular mounting plate.

8. The double-layered steel-concrete composite arch bridge according to claim 5, wherein The wavelength and amplitude of the annular corrugated plate are smaller than those of the outer arched corrugated steel structure and the inner arched corrugated steel structure.

9. The double-layered steel-concrete composite arch bridge according to claim 1, wherein Two groups of foundation connecting pieces are arranged on the foundation, and the two ends of the inner arched corrugated steel structure and the outer arched corrugated steel structure are fixedly connected with the two groups of foundation connecting pieces.

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