Multi-pile pile gripper and multi-pile guide pipe frame foundation construction method for shallow wind power farm

Abstract

The invention discloses a multi-pile pile gripper and a multi-pile guide pipe frame foundation construction method for a shallow wind power farm. The multi-pipe pile gripper comprises a rotary shaft, a large arm, a rotary arm and a small arm; the rotary shaft is arranged in the seat center of an air blower; the large arm is sleeved on the rotary shaft; the rotary arm is sleeved on the rotary shaft; and the small arm is arranged at one end of the rotary shaft and has a small arm center. The multi-pile pile gripper is provided with a plurality of pile centers which are in the same circle together with the small arm center; and the plurality of pile centers are uniformly arranged on the circle. The multi-pile guide pipe frame foundation construction method for the shallow wind farm comprises the following steps of positioning the coordinates of the multi-pipe pile gripper in the seat center, positioning a conveying ship, fixing steel pipe pile on the multi-pile pile gripper to perform pile sinking, and sleeving the guide pipe frame on the steel pipe pile to perform grouting. By adopting the multi-pile pile gripper and the method provided by the invention, the difficulty for driving multi-pile at one ship position is solved, and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of foundation engineering of the offshore wind power industry, in particular to a construction method for a multi-pile jacket foundation of a shallow sea wind farm. Background technique [0002] With the advancement of science and technology, wind power has developed from traditional onshore wind power to the current offshore intertidal zone and offshore waters; the basic structure of wind power generation also has high pile caps, single piles and multi-pile jackets, etc. kind of structure. The installed capacity of a single wind turbine is also developing from the current mainstream 2.5MW and 3MW to 5MW or more in the future, resulting in larger and larger foundation piles, heavier and heavier construction, and more and more difficult construction. Due to the influence of various factors such as equipment and construction technology, and considering the costs of all parties, the multi-pile jacket structure is more s...

AI Technical Summary

Problems solved by technology

[0004] 1) The first set of construction technology requires seabed leveling, and the post-pile driving needs to be leveled every time a pile is driven, which requires a large amount of large-scale lifting equipment investment, and the construction efficiency is low, which is greatly affected by sea conditions. Usually, the efficiency is 1 set Basic / 15 days;

[0005] 2) Although the second set of construction plan has fewer procedures than the first set of construction plan, the construction efficiency is very low due to the need to customize the jacket according to the size of the multi-pile pile position, about 1 set of foundation / 20 days

[0006] In view of this, how to design a multi-pile jacket foundation construction method for shallow sea wind farms, solve the problem that it is difficult to install multiple steel pipe piles in one ship position, and reduce the position error between multiple installations is an urgent problem to be solved by the industry.

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