Steel-concrete composite cylindrical foundation structure and construction method thereof

Abstract

The invention discloses a steel-concrete composite cylindrical foundation structure and a construction method of the steel-concrete composite cylindrical foundation structure. A concrete cylindrical transition section of which the side surface is a curved surface is arranged on a top concrete cover; a steel cylinder wall is arranged below the top concrete cover; a steel division plate is arranged in the internal space of the steel cylinder wall; and the steel cylinder wall and the steel division plate are both provided with a resistance reducing ring. The construction method of the steel-concrete composite cylindrical foundation structure comprises the following steps: assembling the steel cylinder wall and the steel division plate on land; welding a thin-wall profiled steel plate with the steel cylinder wall and the steel division plate together form a sealed steel structure with an opening at bottom; putting the sealed steel structure in water by hoisting to check if the air tightness of the sealed steel structure meets the requirement or not, and tying a cable if the air tightness of the sealed steel structure meets the requirement; constructing the top concrete cover and the concrete cylindrical transition section on the thin-wall profiled steel plate; and after the construction is finished and the design intensity requirements are met, transporting the whole foundation to the construction site in a driving way to subside under negative pressure. Under the aid of negative-pressure subsiding method, the subsiding speed and subsiding accuracy of the cylindrical foundation can be improved greatly. The construction method of the steel-concrete composite cylindrical foundation structure is simple, and the engineering cost is low.

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. With the assistance of the negative pressure sinking method, the sinking speed and sinking rate of the concrete cylindrical foundation can be greatly improved

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