Steel-concrete composite cylinder-type foundation structure and construction method thereof

Abstract

The invention discloses a steel-concrete composite cylinder-type foundation structure and a construction method thereof. A concrete cylinder-type transition section with a cambered wall surface is arranged on a concrete top cover; a cylinder structure which is formed by a concrete cylinder wall and a steel cylinder wall is arranged on the lower side of the concrete top cover; air blow/water pipes are uniformly arranged in the concrete cylinder wall along the radial direction; and a steel subdivision plate is arranged in the internal space of the steel cylinder wall. The construction method comprises the following steps of: prefabricating the steel-concrete composite cylinder-type foundation structure on the land; transporting the whole foundation structure to a construction site in a floating mode, and performing self-weight sinking construction and negative pressure sinking construction; after the negative pressure sinking construction is stopped, performing groundbreaking sinking construction through the air blow/water pipes; and leveling by applying different in-cabin positive pressure onto all sub-cabins through a pump system when the foundation structure is inclined in the sinking process. The foundation structure can be extremely easily sunk into a soil body to reach a designed sinking depth by overcoming the resistance of the soil body, and the sinking speed and the sinking arrival rate of a cylinder-type foundation can be substantially improved, so that the construction period of a foundation structure system is shortened, and engineering cost is greatly reduced.

Description

technical field [0001] The invention relates to a basic structure, in particular to a basic structure in port, ocean, water conservancy and bridge engineering and a construction method thereof. Background technique [0002] At present, in port, marine, water conservancy and bridge projects, the common foundation forms mainly include pile foundation, bracket foundation, gravity foundation and cylinder foundation. Concrete barrel foundations are gradually recognized and widely used in engineering circles due to their advantages such as simple construction and suitable for setting ballast on the foundation. [0003] However, since the wall of the concrete cylindrical foundation is generally relatively thick, the resistance of the soil during the sinking process is very large, so that the design value of the side wall frictional resistance cannot be fully realized, so it is easy to cause the problem of insufficient sinking, and even lead to complete sinking. fail. Contents of...

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Problems solved by technology

[0004] The invention aims to solve the technical problem that the wall of the existing concrete cylindrical foundation is relatively thick, and the technical problem that the sinking is not in place is likely to be caused during the sinking process. It provides a steel-concrete composite cylindrical foundation structure and its construction method, which can greatly Significantly increase the sinking speed and sinking rate of the concrete cylindrical foundation

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