A steel column concrete root deep water foundation structure and its construction method

Abstract

The invention discloses a steel column concrete root deep water foundation structure and a construction method for the steel column concrete root deep water foundation structure. The steel column concrete root deep water foundation structure comprises an upper steel column and lower concrete roots, wherein the upper steel column is internally hollow, the diameter of the upper steel column is 3.2 mor above, and the bottom of the upper steel column goes deep to be below the local scour line of the seabed; and the lower concrete roots are provided at least three and of solid structures, the diameter of each lower concrete root is 0.8-2.5 m, and the lower concrete roots are arranged inside the upper steel column, the upper ends of the lower concrete roots are fixedly connected with the innerwall of the upper steel column through a first cushion cap, the first cushion cap is above the seabed surface, the lower end of the upper steel column is fixedly connected with the outer walls of thelower concrete roots through a bottom seal segment, and the bottom seal segment is formed by pouring concrete. The steel column concrete root deep water foundation structure is simple in constructionand reasonable in force bearing, has the excellent horizontal bearing capacity, further has the reliable vertical bearing capacity and gives full play to the mechanical properties and advantages of different materials, the use amount of basic materials is saved, the construction cost of deep-water foundation in harsh deep-sea environment is lowered, and the steel column concrete root deep water foundation structure and the construction method for the steel column concrete root deep water foundation structure are suitable for the marine engineering deep-water foundation with deep water and fastflow, long and high wave, severe scour and deep covering layers.

Description

technical field [0001] The invention relates to the technical field of marine engineering, in particular to a steel column concrete root deep-water foundation structure and a construction method thereof. Background technique [0002] In response to the trend of national development strategies, the construction of large-scale projects such as cross-sea bridges, offshore wind power projects, and offshore drilling platforms in China has gradually moved from the coast to the deep sea. The harsh deep-sea environment has brought great challenges to the construction of marine engineering, especially in the design and construction of the structure foundation. The deep water and rapid current, strong swell, strong erosion and super thick overburden are all problems that we must overcome. [0003] my country's Ningbo-Zhou Railway and high-speed double-track project Jintang Waterway Highway-Railway Bridge foundation depth will reach 40-60m, the once-in-a-century flow velocity will rea...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing deep water foundation structure has the problems of poor stress and high economic cost

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