A tidal current power generation cast-in-place pile with a pile core steel pipe and its construction method

Abstract

The invention discloses a tidal flow electricity generation cast-in-place pile provided with a pile core steel pipe, and a construction method of the tidal flow electricity generation cast-in-place pile. The cast-in-place pile has the advantages of relatively small diameter, high bending and shear resistance and simple and convenient construction procedures; the cast-in-place pile also solves theproblems that an existing common-diameter cast-in-place pile cannot bear overlarge load generated by a large tidal flow speed in a tidal-flow-energy-rich region and a large-diameter cast-in-place pileoccupies too much of an effective tidal flow cross section, so utilization of tidal flow energy is affected and the construction cost of the large-diameter cast-in-place pile is too high. According to the tidal flow electricity generation cast-in-place pile disclosed by the invention, a pile core steel pipe with a certain length is hit into a rock-socketed cast-in-place pile with a common diameter; a pile foundation of the cast-in-place pile is ensured to be embedded in a depth which is 6 m below a seabed bed rock layer; under the reciprocating load effects of wave, tidal flow and the like, and especially under an extreme weather condition, the pile core steel pipe and a steel reinforcement cage can together play relatively high bending resistance and shear resistance of the cast-in-placepile; so the cast-in-place pile is especially applicable to an offshore area engineering foundation such as the foundation of a tidal flow electricity generation pile which bears a relatively large horizontal load, is high in flexibility and has relatively good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of offshore pile foundation engineering, and in particular relates to a pouring pile for tidal current power generation with a pile core steel pipe and a construction method thereof. Background technique [0002] Under the action of the gravitational force of celestial bodies, seawater produces periodic motion, and the flow in the horizontal direction is called tidal current. Tidal currents exist in the entire ocean, and the tidal current velocity in the open ocean is very small, but under the influence of factors such as land and seabed topography, strong tidal currents exist in coastal waters, especially between straits and submarine waterways. [0003] The method of developing tidal current energy at sea is mainly based on the combination of tidal current energy generating units and supporting carriers. There are two types of supporting carriers: floating and fixed. The floating carrier is fixed on the s...

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Problems solved by technology

[0007] In order to solve the problem that the existing conventional diameter cast-in-situ piles cannot bear the load generated by the high-velocity tidal current, the large-diameter cast-in-place piles occupy too much effective tidal current passing section, thereby affecting the utilization of tidal current energy, and at the same time, the project cost of large-diameter cast-in-place piles is too high , the present invention provides a pouring pile for tidal current power generation with pile core steel pipe and its construction method

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