Offshore steel pipe distributed post-grouting device, air-type grouting assembly and construction method

Abstract

The invention discloses an offshore steep pipe distributed post-grouting device, an air-type grouting assembly and a construction method. The air-type grouting assembly comprises a grouting pipe for being placed into a vertical square grouting channel, square rubber air bags which are wrapped on the outer side of the grouting pipe at upper and lower intervals, an upper air pipe connected with thesquare rubber air bag at the upper end to inflate the square rubber air bag, and a lower air pipe connected with the square rubber air bag at the lower end to inflate the square rubber air bag, and aplurality of slurry outlets are uniformly formed in the outside surface, avoiding the square rubber air bags at the upper and lower ends, of the grouting pipe; and the square rubber air bags are filled under the action of external air pressure, and the square rubber air bags at the upper and lower ends under the sufficient air state form a local closed space with the vertical square grouting channel. According to the air-type grouting assembly, a closed space is formed by using the square rubber air bags arranged up and down and the inner wall of the vertical square grouting channel under sufficient air state, and the local grouting in the vertical square grouting channel is achieved.

Description

technical field [0001] The invention relates to a grouting device in the field of civil engineering, in particular to a distributed post-grouting device for offshore steel pipe piles, a pneumatic grouting assembly and a construction method. Background technique [0002] Due to its high bearing capacity, good flexibility, and fast construction speed, steel pipe piles are widely used in marine and offshore projects such as sea-crossing bridges, port terminals, offshore oil platforms, and offshore wind turbines, and have developed into water construction (structure) An important foundational form of a building. However, steel pipe piles often encounter many problems during construction and use, especially large-diameter and super-long steel pipe piles, mainly including: the effective stress of the pile side soil is reduced due to extrusion disturbance during the pile sinking process; pile sinking load Repeated cycles of repeated cycles lead to fatigue degradation of side resis...

AI Technical Summary

Problems solved by technology

[0006] The second purpose of the present invention is to provide a distributed post-grouting device for offshore steel pipe piles based on an air-type grouting assembly. Covering the entire area and the pile-soil system cannot effectively form a close cooperative work system, and it is used to improve the bearing performance of steel pipe piles, reduce the settlement of foundation piles and greatly reduce costs

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