PHC pipe pile static pressure construction method

Abstract

The invention relates to a PHC pipe pile static pressure construction method. The PHC pipe pile static pressure construction method comprises the following steps of S1, pipe pile measuring and layingoff are conducted, buffer hole locating and trepanning, pile machine in place, pipe pile in place, pipe pile static pressure, pile splicing operation, pile following operation, final pressure operation, cleaning operation, machine moving operation and blocking operation. The PHC pipe pile static pressure construction method has the effect that the side displacement of pile side soil bodies of adjacent pipe piles is not prone to overlaying.

Description

technical field [0001] The invention relates to the technical field of pile foundation engineering, in particular to a static pressure construction method of PHC pipe piles. Background technique [0002] With the continuous advancement of the development of my country's construction industry, the gradual reduction of free land area has led to a substantial increase in the vertical height of buildings, a significant reduction in plane layout, and a continuous reduction in the distance between adjacent buildings. And construction put forward higher requirements. [0003] PHC pipe pile static pressure construction is a method of engineering pile foundation construction, which is widely used in pile foundation construction at present. Through the pile-pressing mechanism of the static pile-pressing machine, the self-weight of the pile-pressing machine and the counterweight on the frame provide the reaction force to press the prefabricated pile into the soil. [0004] However, in...

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Problems solved by technology

[0004] However, in the static pressure construction of PHC pipe piles, especially in the pile group construction area, the soil around the pipe piles is displaced to the surroundings, which disturbs the surrounding soil, resulting in the soil having the same volume as the pipe piles in the pile sinking. During the process, a large lateral displacement and upwelling occurred around the pipe piles, and the vertical compression of the pile side soil of the adjacent pipe piles was relatively large. Larger lateral displacement and floating of the body, the pipe piles that have been driven into the ground float upward due to the friction of the displaced soil, resulting in poor construction quality of the pile group, as well as cracks and cracks in the surrounding houses and roads. Displacement of underground pipelines, etc.

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