Corrugated steel mixed arch bridge and construction method thereof

Abstract

The application discloses a corrugated steel mixed and overlapped type arch bridge, which comprises a base, a main arch base poured above the base, a gusset plate assembly at least partially embedded in the interior of the main arch base, an anchoring steel plate installed outside the main arch base and connected with the gusset plate assembly, a corrugated steel arch frame with end portions connected with the anchoring steel plate, embedded main reinforcement and arch ring main reinforcement both arranged above the corrugated steel arch frame, one end of the embedded main reinforcement embedded in the main arch base, the other end of the embedded main reinforcement connected with the arch ring main reinforcement, and a concrete pouring layer filled on the corrugated steel arch frame and covering the arch ring main reinforcement. The application further discloses a construction method of the corrugated steel mixed and overlapped type arch bridge. After the corrugated steel arch frame forms a bridge superstructure construction channel and a support system, all superstructure construction operations can be completed on the corrugated steel arch frame, so that the corrugated steel arch frame does not have adverse effects on the traffic under the bridge.

Description

Technical Field

[0001] This invention relates to the field of bridge construction, and in particular to a corrugated steel composite arch bridge and its construction method. Background Technology

[0002] The safety and ease of construction of bridge structures are important factors affecting the development of bridge structures, especially for bridges that cross roads or navigable waterways, which require rapid erection to ensure that the impact on traffic is minimized.

[0003] For medium and small span reinforced concrete arch bridge structures, the existing technology requires the construction of a full-span scaffold during the construction of the superstructure, and the formwork is erected on top of the scaffold to pour concrete. This construction method will result in a long construction period, complicated construction, and obstruction of traffic under the bridge. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a corrugated steel composite arch bridge, which can be constructed without affecting traffic below the bridge and can be constructed quickly.

[0005] This invention also discloses a construction method for a corrugated steel composite arch bridge.

[0006] According to a first aspect of the present invention, a corrugated steel composite arch bridge includes: a base; a main arch base cast above the base; a pad assembly at least partially embedded inside the main arch base; an anchoring steel plate installed outside the main arch base and connected to the pad assembly; a corrugated steel arch frame with its ends connected to the anchoring steel plate; pre-embedded main reinforcement bars and arch ring main reinforcement bars, both disposed above the corrugated steel arch frame, one end of the pre-embedded main reinforcement bar being embedded in the main arch base, and the arch ring main reinforcement bar being connected to the other end of the pre-embedded main reinforcement bar; and a concrete pouring layer filling the corrugated steel arch frame and covering the arch ring main reinforcement bars.

[0007] It has at least the following beneficial effects: After the corrugated steel arch frame forms the construction passage and support system for the bridge superstructure, all superstructure construction operations can be completed on the corrugated steel arch frame, thus not adversely affecting traffic under the bridge. Furthermore, by pouring a concrete layer on the corrugated steel arch frame, the corrugated steel arch frame, the concrete layer, and the main reinforcement of the arch ring are integrated into a single structure, ensuring the overall load-bearing capacity of the arch bridge.

[0008] A construction method for a corrugated steel composite arch bridge according to a second aspect of the present invention includes the following steps: Step S1, forming a base by casting and forming a main arch seat by casting on the upper surface of the base; Step S2, pre-embedding a pad assembly and pre-embedding a main reinforcement bar during the casting of the main arch seat, wherein the pad assembly is embedded in the main arch seat, one end of the pre-embedding main reinforcement bar is embedded in the main arch seat, and the other end of the pre-embedding main reinforcement bar extends out of the main arch seat; Step S3, installing an anchoring steel plate to connect the anchoring steel plate to the pad assembly, installing a corrugated steel arch frame, and connecting the corrugated steel arch frame to the anchoring steel plate by anchoring bolts; Step S4, installing the main reinforcement bar of the arch ring and distributed reinforcement bars perpendicular to the main reinforcement bar of the arch ring, wherein the main reinforcement bar of the arch ring is connected to the pre-embedding main reinforcement bar by a mechanical joint; Step S5, pouring concrete onto the corrugated steel arch frame to fill the corrugated steel arch frame and cover the main reinforcement bar of the arch ring.

[0009] The invention offers at least the following advantages: The arch bridge construction method of this invention, by installing corrugated steel arch frames to form a construction channel and support system for the bridge superstructure, allows all superstructure construction operations to be completed on the corrugated steel arch frames, thus avoiding any adverse impact on traffic below the bridge. Specifically, a pad assembly is embedded within the main arch seat, and the corrugated steel arch frame can be connected to the pad assembly via anchor steel plates, stabilizing the structure of the corrugated steel arch frame. Furthermore, concrete is poured onto the corrugated steel arch frame, which integrates the corrugated steel arch frame and the main reinforcement of the arch ring into a unified structure, ensuring the overall load-bearing capacity of the arch bridge.

[0010] According to some embodiments of the present invention, the pad assembly includes a steel pad and pad reinforcement bars, the pad reinforcement bars being U-shaped, the steel pad being disposed at one end away from the opening of the pad reinforcement bars, and the anchoring steel plate being connected to the steel pad.

[0011] According to some embodiments of the present invention, in step S2, multiple pre-embedded main reinforcement bars are provided, and the multiple pre-embedded main reinforcement bars are arranged along the width direction of the bridge and stacked in at least two layers in the vertical direction. In step S4, multiple arch ring main reinforcement bars are provided, and the multiple arch ring main reinforcement bars are connected to the multiple pre-embedded main reinforcement bars one by one through the mechanical joints. The mechanical joints on the corresponding pre-embedded main reinforcement bars in the vertical direction are staggered in the horizontal direction.

[0012] According to some embodiments of the present invention, in step S5, the concrete on the corrugated steel arch is poured in two stages, and the second concrete pour is carried out after the first concrete has solidified.

[0013] According to some embodiments of the present invention, step S1 further includes the following steps: casting a stabilizing wall, the stabilizing wall being located inside the base, and embedding a steel sleeve during the casting of the main arch and the stabilizing wall, such that the steel sleeve passes through the main arch and the stabilizing wall, with both ends of the steel sleeve extending outside the main arch and outside the stabilizing wall, respectively.

[0014] According to some embodiments of the present invention, after the stabilizing wall is poured, the following steps are further included: preparing steel tie rods, inserting the steel tie rods into the steel sleeves, anchoring both ends of the steel tie rods to steel anchor plates, pouring post-cast concrete on the outer side of the main arch seat, and placing the ends of the steel tie rods in the post-cast concrete.

[0015] According to some embodiments of the present invention, the method further includes the following steps: Step S6, after the corrugated steel arch frame is poured, retaining side walls are poured on both sides in the width direction, and side wall ribs are poured on the outer side of the retaining side walls, and soil is filled into the inner side of the retaining side walls and the bridge deck and guardrail are constructed.

[0016] According to some embodiments of the present invention, the corrugated steel arch frame in step S3 is installed on the anchoring steel plate by a transverse segmented hoisting method, and the cross-sectional shape of the corrugated steel arch frame is a curved wave shape or a broken line wave shape.

[0017] According to some embodiments of the present invention, between step S4 and step S5, the following step is further included: inserting shear studs into the gaps of the main reinforcement of the arch ring, and welding the ends of the shear studs to the corrugated steel arch frame.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A partial structural diagram at point A in the middle;

[0022] Figure 3 This is a partial structural diagram of the connection position between the corrugated steel arch frame and the anchoring steel plate in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the corrugated steel arch frame in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of a corrugated steel arch frame in another embodiment of the present invention.

[0025] Icon labels:

[0026] Base 100;

[0027] Main arch seat 200, pad assembly 210, steel pad 211, pad reinforcement 212, embedded main reinforcement 220, arch ring main reinforcement 230, mechanical joint 240, embedded reinforcement 250;

[0028] Anchoring steel plate 300;

[0029] Corrugated steel arch frame 400, anchor bolts 410, shear studs 420;

[0030] 500mm concrete pouring layer;

[0031] Stabilized wall 600, steel sleeve 610, steel tie rod 620, steel anchor plate 630;

[0032] 700 mm of post-cast concrete;

[0033] Retaining sidewall 800, sidewall rib plate 810;

[0034] Gravel 900, road surface structure 910. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, and embedding should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 3The present invention discloses a corrugated steel composite arch bridge, including a base 100, a main arch base 200, a pad assembly 210, an anchor steel plate 300, a corrugated steel arch frame 400, a pre-embedded main reinforcement 220, and an arch ring main reinforcement 230.

[0039] The main arch seat 200 is cast above the base 100. The pad assembly 210 is at least partially embedded inside the main arch seat 200. The anchoring steel plate 300 is installed on the outside of the main arch seat 200 and connected to the pad assembly 210. The end of the corrugated steel arch frame 400 is connected to the anchoring steel plate 300. The pre-embedded main reinforcement 220 and the arch ring main reinforcement 230 are both set above the corrugated steel arch frame 400. One end of the pre-embedded main reinforcement 220 is embedded in the main arch seat 200. The arch ring main reinforcement 230 is connected to the other end of the pre-embedded main reinforcement 220. The concrete pouring layer 500 fills the corrugated steel arch frame 400 and covers the arch ring main reinforcement 230.

[0040] Understandably, after the corrugated steel arch frame 400 forms the construction passage and support system for the bridge superstructure, all superstructure construction operations can be completed on the corrugated steel arch frame 400, thus not adversely affecting traffic under the bridge. Furthermore, by pouring a concrete pouring layer 500 on the corrugated steel arch frame 400, the corrugated steel arch frame 400, the concrete pouring layer 500, and the main reinforcement 230 of the arch ring are combined into an integrated structure, ensuring the overall load-bearing capacity of the arch bridge.

[0041] Reference Figures 1 to 4 The present invention also discloses a construction method for a corrugated steel composite arch bridge, comprising the following steps:

[0042] Step S1: The base 100 is formed by casting and the main arch seat 200 is formed by casting on the upper surface of the base 100;

[0043] Step S2: During the pouring of the main arch seat 200, the pad plate assembly 210 and the main reinforcement 220 are pre-embedded. The pad plate assembly 210 is embedded in the main arch seat 200, one end of the pre-embedded main reinforcement 220 is embedded in the main arch seat 200, and the other end of the pre-embedded main reinforcement 220 extends out of the main arch seat 200.

[0044] Step S3: Install anchor steel plate 300 to connect anchor steel plate 300 with pad assembly 210, install corrugated steel arch frame 400 and connect corrugated steel arch frame 400 with anchor steel plate 300 through anchor bolts 410.

[0045] Step S4: Install the main reinforcement bar 230 of the arch ring and the distributed reinforcement bars perpendicular to the main reinforcement bar 230 of the arch ring. The main reinforcement bar 230 of the arch ring is connected to the pre-embedded main reinforcement bar 220 through the mechanical joint 240.

[0046] Step S5: Pour concrete onto the corrugated steel arch frame 400, so that the concrete fills the corrugated steel arch frame 400 and covers the main reinforcement 230 of the arch ring.

[0047] It is understood that the arch bridge construction method of this invention forms a construction channel and support system for the bridge superstructure by installing corrugated steel arch frames 400, allowing all superstructure construction operations to be completed on the corrugated steel arch frames 400, thus avoiding any adverse impact on traffic below the bridge. Specifically, a pad assembly 210 is embedded in the main arch seat 200, and the corrugated steel arch frame 400 can be connected to the pad assembly 210 through anchor steel plates 300, which can stabilize the structure of the corrugated steel arch frame 400. In addition, concrete is poured on the corrugated steel arch frame 400, which allows the corrugated steel arch frame 400 and the main reinforcement 230 of the arch ring to be integrated into a single structure, ensuring the load-bearing capacity of the overall arch bridge structure.

[0048] It should be noted that embedding one end of the pre-embedded main reinforcement 220 into the main arch seat 200 in step S2 can facilitate the subsequent installation of the main reinforcement 230 of the arch ring.

[0049] After completing step S5, the following steps are also included: using gravel 900 to backfill to form a level site, and laying road surface structure 910 on top of the gravel 900 backfill layer.

[0050] like Figure 2 and Figure 3 As shown, the pad assembly 210 includes a steel pad 211 and pad reinforcement 212. The pad reinforcement 212 is U-shaped, and the steel pad 211 is located at the end away from the opening of the pad reinforcement 212. The anchoring steel plate 300 is connected to the steel pad 211. It should be noted that the steel pad 211 and the pad reinforcement 212 can be an integral structure. The U-shaped pad reinforcement 212 can be inserted into the interior of the main arch seat 200 during the casting of the main arch seat 200. When the anchoring steel plate 300 is connected to the steel pad 211 on the outside of the main arch seat 200, the supporting strength of the anchoring steel plate 300 on the corrugated steel arch frame 400 can be improved. In addition, the anchoring steel plate 300 can be π-shaped, and the anchoring steel plate 300 can be connected to the steel pad 211 by welding or mechanical connection.

[0051] like Figures 1 to 3 As shown, multiple pre-embedded main reinforcement bars 220 can be installed in step S2. These multiple pre-embedded main reinforcement bars 220 are arranged along the width direction of the bridge and stacked in at least two layers vertically. Figure 2In the process, the pre-embedded main reinforcement 220 is stacked in two layers along the vertical direction. In step S4, multiple arch ring main reinforcements 230 can be provided. The multiple arch ring main reinforcements 230 are connected to the multiple pre-embedded main reinforcements 220 one by one through mechanical joints 240. The mechanical joints 240 on the corresponding pre-embedded main reinforcements 220 in the vertical direction are staggered in the horizontal direction. Since the connection positions of the pre-embedded main reinforcements 220 and the arch ring main reinforcements 230 in the same vertical plane are staggered by a certain distance in the horizontal direction, the bearing capacity of the arch bridge can be improved, and the arch bridge can be prevented from breaking under stress.

[0052] It is understood that in step S5 of this embodiment of the invention, the concrete on the corrugated steel arch 400 can be poured in two stages, with the second pour being carried out only after the first pour has solidified. It should be noted that if the concrete is poured in one go, the corrugated steel arch 400 cannot bear the weight of all the concrete, which could easily damage the structure of the corrugated steel arch 400. However, if the concrete is poured in batches, the corrugated steel arch 400 can bear the weight of the first pour, and after the first pour has solidified, the concrete bonds with the corrugated steel arch 400, improving its load-bearing capacity. Therefore, the second pour will not cause the corrugated steel arch 400 to break. Of course, it is understood that the concrete can also be poured in multiple batches, not just in two stages.

[0053] Reference Figures 1 to 3 In cases where the bridge span is large and the superstructure load is large, step S1 in this embodiment of the invention may further include the following steps: casting a stabilizing wall 600, the stabilizing wall 600 being located inside the base 100, and embedding a steel sleeve 610 during the casting of the main arch seat 200 and the stabilizing wall 600, so that the steel sleeve 610 passes through the main arch seat 200 and the stabilizing wall 600, with both ends of the steel sleeve 610 extending beyond the main arch seat 200 and the stabilizing wall 600 respectively. The stabilizing wall 600 can increase the support strength of the bridge bottom structure.

[0054] Understandably, after the stabilizing wall 600 is poured, the following steps are also included: preparing steel tie rods 620, inserting the steel tie rods 620 into the steel sleeves 610, and anchoring both ends of the steel tie rods 620 to the steel anchor plates 630. The post-cast concrete 700 is poured on the outer side of the main arch seat 200, and the ends of the steel tie rods 620 are placed in the post-cast concrete 700. The steel tie rods 620 can provide the bridge with greater load-bearing capacity in the horizontal direction.

[0055] It should be noted that, in cases where the bridge span is large and the superstructure load is heavy, the embodiments of the present invention may further include the following steps: Step S6, after the corrugated steel arch frame 400 is poured, retaining sidewalls 800 are poured on both sides in the width direction, and sidewall ribs 810 are poured on the outer side of the retaining sidewalls 800. Soil is then filled into the inner side of the retaining sidewalls 800, and the bridge deck and guardrails are constructed. The sidewall ribs 810 can improve the overall stability of the retaining sidewalls 800 and prevent lateral overturning. Furthermore, the corrugated steel arch frame 400 and the poured concrete form a main arch ring as a whole. The bridge deck system can be formed inside the retaining sidewalls 800 by filling with soil, or stairways can be directly laid on the main arch ring.

[0056] like Figure 4 and Figure 5 As shown, in step S3 of this embodiment, the corrugated steel arch 400 is installed on the anchor steel plate 300 by a transverse segmented hoisting method. The cross-sectional shape of the corrugated steel arch 400 can be... Figure 4 The curved or wavy shape in the middle Figure 5 The corrugated steel arch 400 has a wavy, zigzag shape. Specifically, when the end face of the corrugated steel arch 400 is a curved, wavy shape, the curve can be circular, catenary, or parabolic. The corrugated steel arch 400 can be prefabricated in a factory, transported to the construction site in sections, and then hoisted after assembly.

[0057] like Figure 2 and Figure 3 As shown, between steps S4 and S5, the following steps are also included: inserting shear studs 420 into the gaps in the main reinforcement bars 230 of the arch ring, and welding the ends of the shear studs 420 to the corrugated steel arch frame 400. The shear studs 420 enhance the bond between the corrugated steel arch frame 400 and the concrete, further enhancing the overall stability of the arch bridge structure. The side wall ribs 810 can be cast simultaneously with the retaining side wall 800.

[0058] Reference Figure 2 Before pouring the retaining side wall 800, pre-embedded steel bars 250 can be embedded during the concrete pouring process on the corrugated steel arch frame 400, so that one end of the pre-embedded steel bar 250 is located in the concrete layer above the corrugated steel arch frame 400, and the other end is embedded in the retaining side wall 800. The pre-embedded steel bars 250 can enhance the connection strength between the retaining side wall 800 and its substructure.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A corrugated steel composite arch bridge, characterized in that, include: Base; The main arch base is cast above the base, and the outer side of the main arch base is formed by post-cast concrete. The pad assembly is at least partially embedded inside the main arch seat; Anchor steel plates are installed on the outside of the main arch seat and connected to the pad assembly; A corrugated steel arch frame, with its ends connected to the anchoring steel plate; Both the pre-embedded main reinforcement and the arch ring main reinforcement are set above the corrugated steel arch frame. One end of the pre-embedded main reinforcement is embedded in the main arch seat, and the arch ring main reinforcement is connected to the other end of the pre-embedded main reinforcement. A concrete pouring layer is poured onto the corrugated steel arch frame and covers the main reinforcement bars of the arch ring; A stabilizing wall is cast inside the base; A steel sleeve passes through the main arch seat and the stabilizing wall, with both ends of the steel sleeve extending beyond the main arch seat and the stabilizing wall, respectively. A steel tie rod is inserted into the steel sleeve, and both ends of the steel tie rod are anchored to steel anchor plates. The end of the steel tie rod is placed in the post-poured concrete.

2. A construction method for a corrugated steel composite arch bridge, characterized in that, Includes the following steps: Step S1: A base is formed by pouring concrete, and a main arch is formed on the upper surface of the base. A stabilizing wall is poured, located inside the base. During the pouring of the main arch and the stabilizing wall, a steel sleeve is embedded, passing through the main arch and the stabilizing wall. The two ends of the steel sleeve extend outside the main arch and the stabilizing wall, respectively. A steel tie rod is prepared, inserted into the steel sleeve, and its two ends are anchored to a steel anchor plate. Post-concrete is poured on the outer side of the main arch, and the ends of the steel tie rod are placed inside the post-concrete. Step S2: During the pouring of the main arch seat, a pad plate assembly and a pre-embedded main reinforcement are pre-embedded. The pad plate assembly is embedded in the main arch seat, one end of the pre-embedded main reinforcement is embedded in the main arch seat, and the other end of the pre-embedded main reinforcement extends out of the main arch seat. Step S3: Install the anchoring steel plate to connect the anchoring steel plate to the pad assembly, install the corrugated steel arch frame, and connect the corrugated steel arch frame to the anchoring steel plate using anchoring bolts; Step S4: Install the main reinforcement bars of the arch ring and the distributed reinforcement bars perpendicular to the main reinforcement bars of the arch ring. The main reinforcement bars of the arch ring are connected to the pre-embedded main reinforcement bars through mechanical joints. Step S5: Pour concrete onto the corrugated steel arch frame, so that the concrete fills the corrugated steel arch frame and covers the main reinforcement of the arch ring.

3. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, The pad assembly includes a steel pad and pad reinforcement bars. The pad reinforcement bars are U-shaped. The steel pad is located at the end away from the opening of the pad reinforcement bars. The anchoring steel plate is connected to the steel pad.

4. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, In step S2, multiple pre-embedded main reinforcement bars are provided. These multiple pre-embedded main reinforcement bars are arranged along the width direction of the bridge and stacked in at least two layers in the vertical direction. In step S4, multiple arch ring main reinforcement bars are provided. These multiple arch ring main reinforcement bars are connected to the multiple pre-embedded main reinforcement bars one-to-one through the mechanical joints. The mechanical joints on the corresponding pre-embedded main reinforcement bars in the vertical direction are staggered in the horizontal direction.

5. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, In step S5, the concrete on the corrugated steel arch is poured in two stages, and the second concrete pour is carried out after the first concrete has solidified.

6. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, It also includes the following steps: Step S6: After the corrugated steel arch frame is poured, retaining side walls are poured on both sides in the width direction, and side wall ribs are poured on the outer side of the retaining side walls. Soil is then filled into the inner side of the retaining side walls, and the bridge deck and guardrail are constructed.

7. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, In step S3, the corrugated steel arch frame is installed on the anchoring steel plate by a transverse segment hoisting method. The cross-sectional shape of the corrugated steel arch frame is a curved wave shape or a broken line wave shape.

8. The construction method for a corrugated steel composite arch bridge according to claim 2, characterized in that, Between step S4 and step S5, the following step is also included: inserting shear nails into the gaps of the main reinforcement bars of the arch ring, and welding the ends of the shear nails to the corrugated steel arch frame.

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