Tied arch bridge with high support serving as construction passage and construction method thereof

Abstract

The present application relates to a kind of high support and do construction passageway's tied arch bridge and its construction method, the tied arch bridge includes arch bridge tie beam, bearing system, formwork platform, arch bridge beam and prefabricated bridge deck panel.When construction, the construction support of arch bridge tie beam and arch bridge beam is used as passageway, the rigidity of arch bridge tie beam and arch bridge beam structure is fully utilized, temporary passageway is set, the requirement of bridge construction process material removal is satisfied, and the construction of tied arch bridge is completed.At the same time, it can be constructed simultaneously from both sides, and the construction process is accelerated.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering, and in particular to a tied arch bridge with a high-level support structure that also serves as a construction access, and its construction method. Background Technology

[0002] The construction process of existing tied-arch bridges typically requires the erection of temporary steel trestle bridges alongside the bridge construction site as access routes to assist in bridge construction. This invention patent proposes a construction method for tied-arch bridges that utilizes elevated supports as construction access routes. Compared to traditional methods, this method directly utilizes the construction supports for the arch bridge's tie beams and crossbeams as access routes, fully leveraging the structural rigidity of these structures. The temporary access routes meet the material handling requirements during bridge construction, enabling the completion of the tied-arch bridge construction. Compared to traditional methods, this eliminates the need for steel trestle bridges, reducing the construction cost of tied-arch bridges. Summary of the Invention

[0003] The purpose of this invention is to avoid the need to erect temporary trestle bridges during the construction of tied arch bridges, and to utilize existing construction supports as construction passages to meet the requirements of material transportation and hoisting, thereby enabling convenient phased construction of tied arch bridges and reducing bridge construction costs. This invention proposes a tied arch bridge with high-level supports serving as construction passages and its construction method.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] One aspect of the present invention provides a tied-arch bridge with a high-level support structure that also serves as a construction access route, comprising:

[0006] The arch bridge tie beam, the load-bearing system located below the arch bridge tie beam, the formwork platform located on the arch bridge tie beam, the arch bridge crossbeam located on the formwork platform, and the precast bridge deck located on the arch bridge crossbeam.

[0007] Furthermore, the load-bearing system includes a tie beam load-bearing bracket and a crossbeam support bracket disposed in the middle of the tie beam load-bearing bracket.

[0008] The second aspect of this invention provides a construction method for a tied-arch bridge where the elevated support also serves as a construction passage, characterized by comprising the following steps:

[0009] S1: A load-bearing system is installed under the tie beam of a concrete arch bridge;

[0010] S2: The crane enters the formwork platform from the bridgehead to assist in the installation of the steel reinforcement in the arch bridge beam and the formwork on both sides of the arch bridge beam;

[0011] S3: Construct the arch bridge crossbeam from both ends of the template platform toward the mid-span. The constructed arch bridge crossbeam is the completed crossbeam.

[0012] S4: Lay steel rails on the constructed beams obtained in step S3, and use the steel rails and material transport trolleys to transport the building materials needed for construction to the location of the crane for lifting and installation;

[0013] S5: After the arch bridge beams are erected to the mid-span position, the crane will remove the nearest steel rails and place the removed steel rails on the material transport trolley. The first batch of bridge deck panels will then be installed on the constructed beams after the steel rails have been removed.

[0014] S6: Install a ramp rail between the template platform and the constructed crossbeam described in step S5; the crane climbs from the template platform to the first batch of bridge deck via the ramp rail;

[0015] S7: Install the first batch of bridge panels from the middle of the span towards both ends, while removing the steel rails as they are installed;

[0016] S8: After the first batch of bridge deck panels is installed, the arch ribs and hangers are installed and the first tensioning is completed;

[0017] S9: Complete the installation of the remaining second batch of bridge panels in sequence.

[0018] Furthermore, a crane passage area is provided on the template platform; the division of the crane passage area satisfies the requirement of uniform stress on the template platform.

[0019] Furthermore, the material transport trolley described in step S4 travels on the steel track.

[0020] Furthermore, the steel rail described in step S4 has a segmented structure.

[0021] Furthermore, the length of the arch bridge beam in step S5 is greater than the necessary width for the crane to pass through, so as to allow the crane to move longitudinally along the bridge on the first batch of bridge decks.

[0022] Furthermore, in step S5, the material transport trolley transports the first batch of prefabricated bridge panels to the location of the crane.

[0023] Furthermore, the angle formed between the ramp rail and the template platform in step S6 is 10-25°.

[0024] Furthermore, the second batch of bridge deck panels described in step S9 is installed after the arch ribs and hangers are installed, which reduces the load on the support during the construction process.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] This invention proposes a tied-arch bridge with elevated supports serving as construction access and its construction method. Compared with traditional construction methods, it directly utilizes the construction supports of the arch bridge's tie beams and crossbeams as passageways, fully leveraging the structural rigidity of the tie beams and crossbeams to establish temporary access, meeting the material handling requirements during bridge construction, and completing the construction of the tied-arch bridge. Compared with traditional construction methods, it eliminates the need for steel trestle bridges, reducing the construction cost of the tied-arch bridge. Attached Figure Description

[0027] Figure 1 This is a cross-sectional schematic diagram of the load-bearing system according to an embodiment of the present invention;

[0028] Figure 2 This is a construction plan layout diagram of the arch bridge tie beam according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the construction cross section of the arch bridge beam according to an embodiment of the present invention;

[0030] Figure 4 This is a construction plan layout diagram of the arch bridge crossbeam according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram illustrating the transformation of the crane access channel according to an embodiment of the present invention;

[0032] Figure 6 This is a plan view of the first batch of bridge deck installation construction according to an embodiment of the present invention;

[0033] Figure 7 This is a cross-sectional view of the first batch of bridge deck installation in an embodiment of the present invention;

[0034] Figure 8 This is a construction plan view of the second batch of bridge deck installation according to an embodiment of the present invention;

[0035] Figure 9 This is a cross-sectional view of the second batch of bridge deck installation in an embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the arch bridge during the second batch of bridge deck installation in an embodiment of the present invention.

[0037] The numbers in the diagram are as follows:

[0038] 1. Tie beam support; 2. Crossbeam support; 3. Arch bridge tie beam; 4. Formwork platform; 5. Arch bridge crossbeam; 6. Crane access area; 7. Steel rails; 8. Material transport trolley; 9. Inclined rail; 5-1. End crossbeam; 5-2. Crossbeam already constructed; 5-3. Crossbeam to be constructed; 6-1. First batch of bridge deck panels; 6-2. Second batch of bridge deck panels. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of the present invention and to simplify 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. Therefore, they should not be construed as limitations on the present invention.

[0042] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0043] Example

[0044] Firstly, based on functional requirements, in the construction design of the support system, a tie beam support 1 is installed below the concrete arch bridge tie beam 3, and a crossbeam support 2 is installed in the middle of the crossbeam, which also serves as temporary support for mechanical passage. (See...) Figure 1 Following this method and considering the cross-sectional shape of the tied-arch bridge, the design and erection of temporary supports were completed.

[0045] like Figure 2 , 3As shown, after the support frame is erected, a small crawler crane enters the crane access area 6 designated on the formwork platform 4 from the bridgehead. Within the access area 6, the crane assists in the installation of tie beam reinforcement and formwork, and provides lifting and transport functions for materials.

[0046] like Figure 4 As shown, the arch bridge crossbeams 5 are constructed from both ends of the template platform 4 towards the mid-span. After construction, the arch bridge crossbeams 5 change from the crossbeams to be constructed 5-3 to the constructed crossbeams 5-2, and so on until the end crossbeams 5-1. Segmented steel rails 7 are laid on the constructed crossbeams 5-2. Using the steel rails 7 and material transport trolleys 8, the building materials required for construction are transported to the location of the crane for lifting and installation.

[0047] like Figure 5 As shown, after the arch bridge crossbeam 5 is erected to the mid-span position, the crane removes the nearest steel rail 7 and places the removed steel rail 7 on the material transport trolley 8. The first batch of bridge deck panels 6-1 are then installed on the constructed crossbeam 5-2 after the steel rail 7 has been removed. A ramp rail 9 is installed between the formwork platform 4 and the constructed crossbeam 5-2 described in step S5. The crane climbs from the formwork platform 4 to the first batch of bridge deck panels 6-1 via the ramp rail 9, completing the transfer of the passageway. At this point, the crossbeam has good load-bearing capacity, transferring the weight of the precast slabs and the crane to the tie beams on both sides, achieving uniform stress distribution across the three sets of supports.

[0048] like Figure 6 , 7 As shown, the first batch of bridge deck panels 6-1 are installed sequentially from the middle of the span towards both ends, while the steel rails 7 are removed sequentially during installation.

[0049] After the first batch of bridge deck panels 6-1 was installed, the arch ribs and hangers were installed, and the first tensioning was completed. The remaining second batch of bridge deck panels 6-2 and other construction procedures were then completed sequentially. The phased installation of the panels alleviated the load on the intermediate support 2.

[0050] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A construction method for a tied-arch bridge with a high-level support structure also serving as a construction access, characterized in that, Tie-arch bridges include: Arch bridge tie beam (3). The load-bearing system set below the arch bridge tie beam (3), The formwork platform (4) is set on the arch bridge tie beam (3). The arch bridge beam (5) is set on the template platform (4). Precast bridge deck panels are installed on the crossbeam (5) of the arch bridge; The load-bearing system includes a tie beam load-bearing bracket (1) and a crossbeam support bracket (2) set in the middle of the tie beam load-bearing bracket (1). The tie beam support bracket (1) and cross beam support bracket (2) of the arch bridge tie beam (3) and arch bridge cross beam (5) are used directly as passageways; The construction method includes the following steps: S1: A load-bearing system is installed below the arch bridge tie beam (3); S2: The crane enters the formwork platform (4) from the bridgehead to assist in the installation of the steel reinforcement in the arch bridge tie beam (3) and the formwork on both sides of the arch bridge tie beam (3); S3: Construct the arch bridge crossbeam (5) from both ends of the template platform (4) towards the middle of the span. The constructed arch bridge crossbeam (5) is the constructed crossbeam (5-2). S4: Lay steel rails (7) on the constructed beams (5-2) obtained in step S3, and use the steel rails (7) and material transport trolleys (8) to transport the building materials required for construction to the location of the crane for lifting and installation; S5: After the arch bridge beam (5) is erected to the mid-span position, the crane will remove the nearest steel rail (7), place the removed steel rail (7) on the material transport trolley (8), and install the first batch of bridge deck (6-1) on the constructed beam (5-2) after the steel rail (7) has been removed; S6: Set up a ramp rail (9) between the template platform (4) and the constructed crossbeam (5-2) described in step S5; the crane climbs from the template platform (4) to the first batch of bridge deck (6-1) via the ramp rail (9); S7: Install the first batch of bridge deck panels (6-1) from the middle of the span to both ends, and remove the steel rails (7) while installing. S8: After the first batch of bridge deck panels (6-1) is installed, the arch ribs and hangers are installed and the first tensioning is completed; S9: Complete the installation of the remaining second batch of bridge panels (6-2) in sequence.

2. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, The template platform (4) is provided with a crane passage area (6); the division of the crane passage area (6) satisfies the uniform stress of the template platform (4).

3. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, The material transport trolley (8) mentioned in step S4 travels on the steel track (7).

4. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 3, characterized in that, The steel rail (7) mentioned in step S4 is a segmented structure.

5. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, The length of the arch bridge beam (5) mentioned in step S5 is greater than the necessary width for the crane to pass through, so as to allow the crane to move longitudinally along the bridge on the first batch of bridge decks (6-1).

6. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, In step S5, the material transport trolley (8) transports the prefabricated first batch of bridge deck panels (6-1) to the location of the crane.

7. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, The angle between the ramp rail (9) and the template platform (4) in step S6 is 10-25°.

8. The construction method of the tied arch bridge with high-level support serving as a construction passage as described in claim 1, characterized in that, The second batch of bridge deck panels (6-2) mentioned in step S9 is installed after the arch ribs and hangers are installed, which reduces the load on the support during the construction process.

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