Connecting structure of railway bridge pipe pile and bearing platform, foundation structure and construction method

Abstract

The invention discloses a connection structure of a railway bridge large-diameter pipe pile and a bearing platform. The connection structure is characterized by comprising a first flange plate (31), asecond flange plate (32) with preset steel sleeves (4), and an anchoring steel bar (5). The first flange plate (31) is welded and fixed on an end plate (2) at the top end of a tubular pile (1). A plurality of steel sleeves (4) are fixedly connected to the top surface of the second flange plate (32) in the circumferential direction. An anchoring steel bar (5) is fixedly connected in each steel sleeve (4). A bearing platform (6) is poured at the top of the pipe pile (1), and the whole first flange plate (31), the second flange plate (32), the steel sleeves (4), the anchoring steel bar (5) and one part of the top of the pipe pile (1) are connected with one another and embedded into the bearing platform. The connection mode ensures the integrity of the connection between the pile and the bearing platform, the horizontal force on the top of the pile can be better transmitted to the whole pile body, and the continuity of the stress is ensured.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a connection structure between a large-diameter pipe pile and a cap of a railway bridge, a foundation structure of a railway bridge and a construction method. Background technique [0002] In recent years, large-diameter pipe piles have been widely used on railway bridges because they are suitable for the geological conditions in soft soil areas, convenient and quick to construct, and save materials. Different from the mechanical characteristics of the building foundation, the railway bridge foundation bears a large horizontal force and bending moment at the connection between the pile top and the cap due to horizontal loads such as braking force. The main connection forms of the pile top plate are welding and anchoring steel bars, inserting bars in the pipe and pouring concrete to fill the core. There are the following problems in the application of the method: ...

AI Technical Summary

Problems solved by technology

Different from the mechanical characteristics of the building foundation, the railway bridge foundation bears a large horizontal force and bending moment at the connection between the pile top and the cap due to horizontal loads such as braking force. The main connection forms of the pile top plate are welding and anchoring steel bars, inserting bars in the pipe and pouring concrete to fill the core. There are the following problems in the application of the method:

[0005] 3. The on-site construction is complicated, and there are certain differences in the operation level of the construction workers. The engineering quality of these two connection methods is not easy to guarantee

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