A type steel truss construction device for demolishing and newly building a main tower of a cable-stayed bridge

Abstract

The utility model provides a kind of tower type construction device for cable-stayed bridge main tower dismantling and new building, utilizes steel truss type tower structure and hoisting crane built around main tower, completes cable-stayed bridge main tower section dismantling and new construction.The steel truss type tower structure includes steel pipe pile foundation, load-bearing main truss, hoisting secondary truss;The steel pipe pile foundation is four groups, and each group has four steel pipe piles, and whole is connected using flat link, diagonal bracing between piles;Load-bearing main truss and hoisting secondary truss are all triangular truss structure, load-bearing main truss is fixedly connected with steel pipe pile foundation, and hoisting secondary truss can move horizontally along load-bearing main truss;Hoisting crane is arranged on hoisting secondary truss, and hoisting crane can move horizontally along hoisting secondary truss, the utility model utilizes hoisting crane to complete cable-stayed bridge main tower dismantling and new building, and it is suitable for old bridge main tower dismantling and reconstruction construction in limited area of large hoisting equipment in inland river basin, not limited by existing equipment and on-site hydrological environment.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology and provides a steel truss construction device for the demolition and construction of main towers of cable-stayed bridges. Background Technology

[0002] Due to long-term damage and overloading, the old bridge's performance has declined over the years, failing to meet safety requirements. Therefore, it needs to be demolished in situ and rebuilt before being put back into use. However, as major urban traffic arteries, the bridge sites are now surrounded by dense traffic networks and busy waterways. Water and land transportation cannot meet the needs of large equipment for construction, and there are high requirements for the efficiency, technology, safety, and environmental protection of bridge demolition and reconstruction.

[0003] Currently, the main tower of the old bridge is mainly demolished using large-tonnage floating cranes or tower cranes. However, in urban centers where shipping is restricted, large floating cranes cannot be brought in. The main tower of the old bridge is designed as a separate tower-pier system, which makes it impossible for tower cranes to attach and fix it. Therefore, there is an urgent need for a new construction device and method to achieve integrated construction of demolition and reconstruction of the main tower of the old bridge. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a steel truss construction device and method that can effectively solve the high risks and difficulties in demolition and reconstruction of bridge main towers in restricted construction areas due to their large height, thereby reducing construction costs, simplifying construction organization, and mitigating construction risks.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A steel truss construction device for the demolition and reconstruction of the main tower of a cable-stayed bridge, the steel truss construction device comprising: steel pipe pile foundation, load-bearing main truss, lifting secondary truss, and crane.

[0007] The steel pipe pile foundation consists of four groups, each with four steel pipe piles, which are connected to each other as a whole using horizontal bracing and diagonal bracing. The main load-bearing truss and the secondary lifting truss are both triangular truss structures. The main load-bearing truss is fixedly connected to the steel pipe pile foundation, while the secondary lifting truss can move horizontally along the main load-bearing truss. A crane is installed on the secondary lifting truss and can move horizontally along the secondary lifting truss. The crane is used to complete the demolition and reconstruction of the main tower of the cable-stayed bridge.

[0008] Furthermore, the steel pipe pile foundation adopts a steel pipe pile + steel structure. A total of four sets of steel pipe pile foundations are arranged around the main tower. Each set consists of four steel pipe piles and a connecting system. Distribution beams, load-bearing beams and steel pipe foundations are arranged from top to bottom. Horizontal bracing and diagonal bracing are set between the steel pipe foundations. Figure-eight wind-resistant cables are set on each set of steel pipe pile foundations.

[0009] Furthermore, the load-bearing main truss is a triangular truss structure, with two trusses forming a group, for a total of two groups, which are fixed to the top distribution beam of the steel pipe pile foundation using a bolt structure.

[0010] Furthermore, the secondary lifting truss is a triangular truss structure, consisting of two trusses. Its lower part is connected to the main load-bearing truss via a track, allowing it to move freely horizontally. A crane is installed on the upper part.

[0011] Furthermore, the overhead crane can move horizontally along the secondary crane gantry, and the demolition and reconstruction of the main tower can be completed through the movement of the secondary crane gantry and the overhead crane.

[0012] The beneficial effects of this utility model are: by adopting a steel truss construction device, it effectively solves the problem of large equipment being unable to navigate inland waterways, and can meet the operational requirements of different water spaces. Simultaneously, the structural bearing capacity of the construction device can be flexibly adjusted according to the height and weight of the main tower. Furthermore, the longitudinal and lateral movement of the overhead crane allows for the segmented dismantling and installation of the main tower. Attached Figure Description

[0013] Figure 1 Layout diagram of the steel truss construction device along the bridge direction;

[0014] Figure 2 This is a diagram showing the transverse bridge layout of a steel truss construction device.

[0015] Figure 3 This is a structural diagram of the top of a steel pipe pile;

[0016] Figure 4 This is a structural diagram showing the connection between the load-bearing main truss and the pile top distribution beam.

[0017] Explanation of reference numerals in the attached drawings: 1. Steel pipe pile foundation; 101. Steel pipe pile foundation 1; 102. Steel pipe pile foundation 2; 103. Steel pipe pile foundation 3; 104. Steel pipe pile foundation 4; 1011. Distribution beam; 1012. Load-bearing beam; 1013. Steel pipe foundation; 1014. Horizontal bracing; 1015. Diagonal bracing; 1016. Wind-resistant cable; 2. Load-bearing main truss; 201. Load-bearing main truss segment 1; 202. Load-bearing main truss segment 2; 203. Load-bearing main truss segment 3; 204. Load-bearing main truss segment 4; 2011. Connecting bolt; 3. Lifting secondary truss; 301. Lifting secondary truss segment 1; 302. Lifting secondary truss segment 2; 4. Overhead crane; 5. Main tower of cable-stayed bridge; 6. Main beam of cable-stayed bridge; 7. Water level; 8. Riverbed. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] The technical solution adopted by this utility model relates to a construction device for the demolition and reconstruction of the main tower of an old bridge in an area where large-scale water-based lifting equipment is restricted. It is not limited by the on-site hydrological environment and existing equipment, and can effectively solve the problem of high risk and difficulty in demolition and reconstruction of the main tower of a bridge in an area where construction equipment is restricted due to its large height.

[0020] This invention provides a tower-type construction device for the demolition and reconstruction of the main tower of a cable-stayed bridge. Specifically, it utilizes a steel truss tower structure and a crane erected around the main tower to complete the segmented demolition and reconstruction of the main tower. The steel truss tower structure includes steel pipe pile foundations, a load-bearing main truss, and a crane secondary truss. The steel pipe pile foundation consists of four groups, each with four steel pipe piles, connected as a whole by horizontal bracing and diagonal bracing. Both the load-bearing main truss and the crane secondary truss are triangular truss structures. The load-bearing main truss is fixedly connected to the steel pipe pile foundation, while the crane secondary truss can move horizontally along the load-bearing main truss. A crane is mounted on the crane secondary truss and can move horizontally along it. This invention utilizes the crane to complete the demolition and reconstruction of the main tower of a cable-stayed bridge.

[0021] The steel pipe pile foundation adopts a steel pipe pile + steel structure. A total of four sets of steel pipe pile foundations are arranged around the main tower. Each set consists of four steel pipe piles and a connecting system. Distribution beams, load-bearing beams and steel pipe foundations are arranged from top to bottom. Horizontal bracing and diagonal bracing are set between the steel pipe foundations. Figure-eight wind-resistant cables are set on each set of steel pipe pile foundations.

[0022] The load-bearing main truss is a triangular truss structure, with two trusses forming a group, for a total of two groups, which are fixed to the top distribution beam of the steel pipe pile foundation using a bolt structure.

[0023] The secondary lifting truss is a triangular truss structure, consisting of two trusses. Its lower part is connected to the main load-bearing truss via rails, allowing it to move freely horizontally. A crane is installed on the upper part.

[0024] The overhead crane can move horizontally along the secondary truss, and the demolition and reconstruction of the main tower can be completed through the movement of the secondary truss and the overhead crane. Example 1:

[0025] like Figure 1 , Figure 2 As shown, four sets of steel frame steel pipe pile foundations 1 are set outside the transverse projection line of the main beam of the bridge to be demolished and constructed. The frame foundations can adopt segmented standard components, and the tower-type construction device can be installed and dismantled by using the self-lifting installation method.

[0026] like Figure 3 , Figure 4 As shown, the top of the frame-type steel pipe pile foundation is connected as a whole by the distribution beam 1011 and the load-bearing beam 1012, and then connected to the load-bearing main truss 201 by bolts 2011.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel truss construction device for the demolition and reconstruction of main towers of cable-stayed bridges, characterized in that, The steel truss construction device includes: steel pipe pile foundation, load-bearing main truss, lifting secondary truss, and crane. The steel pipe pile foundation consists of four groups, each with four steel pipe piles, which are connected to each other as a whole using horizontal bracing and diagonal bracing. The main load-bearing truss and the secondary lifting truss are both triangular truss structures. The main load-bearing truss is fixedly connected to the steel pipe pile foundation, while the secondary lifting truss can move horizontally along the main load-bearing truss. A crane is installed on the secondary lifting truss and can move horizontally along the secondary lifting truss. The crane is used to complete the demolition and reconstruction of the main tower of the cable-stayed bridge.

2. The steel truss construction device for the demolition and reconstruction of main towers of cable-stayed bridges according to claim 1, characterized in that, The steel pipe pile foundation (1) adopts a steel pipe pile + steel structure. Four sets of steel pipe pile foundations are arranged around the main tower. Each set consists of four steel pipe piles and a connecting system. From top to bottom, the distribution beam (1011), the load-bearing beam (1012) and the steel pipe foundation (1013) are arranged in sequence. Horizontal bracing (1014) and diagonal bracing (1015) are set between the steel pipe foundations (1013). The figure-eight wind-resistant cable (1016) is set on each set of steel pipe pile foundations.

3. A steel truss construction device for the demolition and reconstruction of main towers of cable-stayed bridges according to claim 1, characterized in that, The load-bearing main truss (2) is a triangular truss structure, with two trusses in a group, for a total of two groups, and is fixed to the top distribution beam (1011) of the steel pipe pile foundation (1) using a bolt structure (2011).

4. A steel truss construction device for the demolition and reconstruction of main towers of cable-stayed bridges according to claim 1, characterized in that, The secondary lifting truss (3) is a triangular truss structure with two trusses. Its lower part is connected to the main load-bearing truss via a track, allowing it to move freely horizontally. The upper part is equipped with a crane (4).

5. A steel truss construction device for the demolition and reconstruction of main towers of cable-stayed bridges according to claim 1, characterized in that, The overhead crane (4) can move horizontally along the secondary crane truss (3). Through the movement of the secondary crane truss (3) and the overhead crane (4), the demolition and construction of the main tower can be completed.

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