Seaborne implantable rock-socketed steel pipe pile bottom sealing construction method

Abstract

A bottom sealing construction method for an offshore implantable rock-socketed steel pipe pile is characterized in that a steel casing, an assembled implantable core pile with pile bottom precast concrete and a high-performance grouting material are matched, after the steel pipe pile is manufactured, concrete is poured in a factory, the core pile is manufactured, and a plurality of distances are reserved from the bottom of the concrete to the section of the bottom of the steel pipe pile. An uneven surface in a rock-socketed formed hole can be conveniently implanted, and filling is carried out through follow-up pressure grouting high-performance grouting materials. According to the method, pile bottom concrete implanted into a core pile is prefabricated in a steel pipe pile factory, then a high-performance grouting material is used for filling and blocking a gap between the core pile and bed rock, the offshore concrete pouring construction process is omitted, the construction efficiency is greatly improved, and the construction window period is shortened. Meanwhile, the construction cost is saved, and the method has important significance on efficiency improvement and cost saving of offshore wind power socketed pile foundation construction.

Description

technical field [0001] The invention relates to the technical field of steel pipe pile installation, in particular to a bottom sealing construction method of an offshore implanted rock-socketed steel pipe pile. Background technique [0002] Wind energy is a kind of clean energy. At the same time, offshore wind energy is more abundant than that on land. my country has a long coastline, and offshore wind energy resources are abundant in coastal areas. The construction situation of rock-socketing at the steel pipe pile end of offshore wind turbine structure foundation. [0003] The general method of steel pipe pile implanted rock-socketed construction is to drive the steel casing into the seabed with a vibrating hammer, and the lower end of the casing penetrates the covering soil layer until it reaches the surface of the bedrock, and then puts the drilling machine into the steel casing , to drill the bedrock, and after the predetermined drilling depth is reached, insert the cor...

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Problems solved by technology

[0004] However, the existing construction technology needs to wait for the pile bottom concrete poured twice to reach the design strength. The offshore construction period is long, and the delay in the construction period increases the rental and use costs of the ship. At the same time, the offshore construction itself is due to the changeable sea environment. , there is a problem that the construction window period is limited, and the increase in the construction period may miss the effective construction period; furthermore, the compactness of the underwater poured concrete may not be guaranteed, and a concrete mixing ship that can adapt to sea conditions needs to be configured, which further increases the construction cost

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