Construction process of open sea fan foundation rock-socketed pile

Abstract

The invention discloses a construction process of an open sea fan foundation rock-socketed pile. The construction process comprises the steps of pile sinking of a steel pipe pile, setting a construction operation platform, drilling, performing intermediate inspection, finishing a drilled hole, clearing the hole, measuring the hole, placing a steel reinforcement cage, placing a guide pipe, clearing the hole for the second time and performing underwater concrete pouring procedure. In the pile sinking procedure of the steel pipe pile, six steel pipe piles with the inclination of 5:1 which are uniformly distributed on the circular track curve are sunken into the foundation in the pile driving way by a special pile driving boat; in the setting procedure of the construction operation platform, the construction of a bearing platform bottoming concrete layer is performed and the construction operation platform is erected on the bearing platform bottoming concrete layer; the concrete of the bearing platform bottoming concrete layer is performed by the steel pipe piles; the construction operation platform is square and comprises an upper bailey frame, a lower bailey frame, a steel platform panel and a safety fence. According to the construction process, the construction efficiency of the pile socketing into rock can be improved, the horizontal resistance and the anti-shifting capability of the rock-embedded piles can be effectively improved, and the requirements of engineering structure design and construction are met.

Description

technical field [0001] The invention relates to a construction technology of a rock-socketed pile for an offshore fan foundation. Background technique [0002] For the construction of offshore wind turbines in open sea areas far away from the land and with a water depth of 16m to 19m, due to the constraints of natural conditions such as weather, tides, and waves, and in areas where tropical storms frequently occur, and the bearing and resistance of the wind turbine equipment to the foundation Pullout force and deformation have very high requirements, so the pile foundation diameter is required to be large and the depth of soil penetration is deep, so that the fan foundation can withstand the huge overturning moment of the fan and withstand the load of waves and water flow, and the construction schedule control is especially important. The essential. In the field of offshore wind farm foundation design, when the water depth is deep and the geological conditions are complex, ...

AI Technical Summary

Problems solved by technology

Auxiliary steel pipe pile pulling and pile top cutting pile repair take a long time, and the cost is high, which is not economical. This structure is only suitable for the calm sea area of ​​the inner bay

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