Super-large-diameter steel skeleton concrete pipe pile deep water foundation and construction method

Abstract

The invention relates to a super-large-diameter steel skeleton concrete pipe pile deep water foundation and a construction method, and belongs to the technical field of ocean deep water foundations. The deep water foundation is of a hollow structure of which the bottom is sealed, and comprises a steel pile casing, a steel skeleton, a concrete pipe body and a bottom sealing section, wherein the bottom end of the steel pile casing is located below the surface of a seabed, and the steel pile casing provides an outer formwork for pipe body concrete filling; the steel skeleton is arranged in the steel pile casing and a drilled hole, forms a double-wall pipe column with the steel pile casing and the drilled hole, and provides an inner formwork for pipe body concrete filling; concrete of the concrete pipe body is poured between the double walls of the pipe column; and the bottom sealing section is located at the lower end of the foundation, is in sealing connection with the interior of the steel skeleton, and is used for improving the vertical bearing capacity of the foundation. The construction method comprises the steps of steel pile casing sinking, drilling construction, downward putting of the integral steel skeleton, bottom sealing section concrete pouring, pipe body concrete pouring, and pumping of sea water in the deep water foundation. The deep water foundation adopts the hollow structure, thus, the use amount of concrete is decreased, the self weight is lowered, the foundation stress of a base is reduced, and the effective vertical bearing capacity of the deep water foundation is improved.

Description

technical field [0001] The application relates to the technical field of marine deep-water foundations, in particular to a super-large-diameter steel skeleton concrete pipe pile deep-water foundation and a construction method. Background technique [0002] The construction of marine engineering such as cross-sea bridges, offshore wind power, offshore drilling platforms and other large-scale projects is gradually advancing from the coast to the deep sea. The harsh deep-sea environment brings great challenges to the construction of marine engineering, especially in the design and construction of deep-water foundations. Hurricanes, rapids, deep water, strong waves and undulating seabed terrain are all problems that must be overcome for the development of marine engineering deep water foundation. [0003] The most notable feature of deep-water foundations in marine engineering is that they need to bear huge horizontal forces, including cross-wind loads, wave and current forces,...

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Problems solved by technology

[0005] The embodiment of this application provides a super-large-diameter steel skeleton concrete pipe pile deep-water foundation and its construction method to solve the problems of low effective bearing capacity, large-scale foundation and high engineering cost in the prior art.

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