A construction technique for cleaning mud inside steel pipe piles of offshore wind power booster stations

Abstract

The invention relates to a construction process for clearing mud inside a steel pipe pile of an offshore wind power step-up station, including S1, measuring the soil depth in the steel pipe pile (2); S2, positioning an air-lift mud pump; S3, hoisting an air-lift mud pump Mudware: Set up rope groups (65) on the first lifting lug (61), second lifting lug (62), third lifting lug (63) and fourth lifting lug (64), four lifting rope groups One end of (65) is jointly connected to the hook (1) of the crane vessel, and the air-lift dredger is hoisted to the predetermined position of the steel pipe pile (2), so that the mud pumping end of the first conduit (31) Extend into the steel pipe pile (2) obliquely until the mud pumping end of the first conduit (31) is inserted into the mud surface of the steel pipe pile (2); S4, start the gas transmission component (4) and the water transmission component (5) . The invention has the following advantages: the efficiency and thoroughness of mud pumping are improved, thereby ensuring the bearing capacity of steel piles.

Description

Technical field: [0001] The invention relates to the field of offshore wind power installation, in particular to a construction process for cleaning mud inside a steel pipe pile of an offshore wind power step-up station. Background technique: [0002] The offshore booster station includes pile foundations, jackets and upper components. The pile foundations, jackets and upper components are arranged sequentially from bottom to top. The pile foundations are driven vertically into the mud surface of the seabed. The pile foundation of the offshore booster station consists of four steel piles composition. At present, during the installation and construction of offshore wind power booster stations, the pile foundation is usually inserted into the mud surface of the seabed, and then the supporting legs under the jacket are inserted into the steel pipe piles. After being driven into the mud surface, the hardness of the mud surface inside the steel pile increases for a period of tim...

AI Technical Summary

Problems solved by technology

At present, during the installation and construction of offshore wind power booster stations, the pile foundation is usually inserted into the mud surface of the seabed, and then the supporting legs under the jacket are inserted into the steel pipe piles. After being driven into the mud surface, the hardness of the mud surface inside the steel pile increases for a period of time due to the isolation of the soil from the seawater, and the mutual extrusion between the soil produces a certain resistance to the pile pressure on the side wall of the steel pile. It has certain limitations, which will affect the bearing capacity of the steel pile. Therefore, the internal mud cleaning of the steel pile after the first insertion is carried out. The air compressor pumps air to form a negative pressure in the steel pipe pile to draw out the mud. However, for large or hard mud in the steel pipe pile, the effect of this kind of mud pumping is poor, and the lack of suction will easily make the mud in the mud pump. internal accumulation, thereby reducing the efficiency of mud pumping; secondly, when the dredger is vertically hoisted to the steel pipe pile by the crane ship at sea, it is easy to shake when the dredger is vertically hoisted, so that the mud pumping end of the dredger is on the steel pipe pile. The internal wall of the pipe pile collides with the steel pipe pile, which affects the structural strength of the steel pile. When the mud pumping end of the mud pump is inserted vertically into the mud surface of the steel pipe pile, if the mud is hard, it will easily block the mud pumping end, making the mud pumping impossible. Continuing, when the mud enters the vertical mud pumping end, it is subjected to the side wall resistance of the mud pumping end, and the mud pump needs to have a large lifting force, otherwise the mud pumping will not be thorough

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