Construction method for reinforcing PHC pipe pile core in mucky soil layer area

Abstract

The invention discloses a construction method for reinforcing a PHC pipe pile core in a mucky soil layer area. The construction method comprises the following steps that according to a pile body quality report of low strain detection of the PHC pipe pile after excavation of a mucky soil body foundation, and sludge filled in an inner cavity of the PHC pipe pile which is judged to be in class II and class III quality grades by using a high-pressure jet grouting drilling machine is stirred and diluted; and then high-pressure compressed air of a high-pressure jet grouting drilling machine is used for gradually extruding slurry water formed through stirring and dilution out of an inner cavity of the PHC pipe pile; then reinforcing steel bars are continuously arranged in the weld joint cracking position area of a PHC pipe pile connector, then concrete is used for filling a pile core reinforcing space, and therefore pile core reinforcing work at the weld joint cracking position of the PHC pipe pile connector is completed. According to the construction method for reinforcing the PHC pipe pile core in the mucky soil layer area, the project construction period can be ensured, and the project construction cost increased by follow-up pile refilling can be reduced.

Description

technical field [0001] The invention belongs to the technical field of building construction and relates to pile foundation construction, in particular to a construction method for reinforcing the core of a PHC pipe pile in a muddy soil layer area. Background technique [0002] PHC pipe pile is one of the common pile foundation design forms in pile foundation engineering. Its advantages are low construction cost, short construction period, and high vertical bearing capacity. Power is low. During the construction of PHC pipe piles, especially the PHC pipe piles installed in the soil containing shallow silt layer, if the PHC pipe piles are not properly set up in partitions and directions, the horizontal shear resistance will be low, and it is easy to be damaged due to pile driving. The lateral extrusion force formed or the lateral extrusion force formed by the height difference of the soil during foundation excavation will cause lateral extrusion on the PHC pipe piles that ha...

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Problems solved by technology

[0003] Aiming at the technical problems existing in the above-mentioned background technology, the present invention proposes a construction method for PHC pipe pile core reinforcement in the silty soil layer area, which solves the problem of the PHC pipe pile inner cavity of Class II and Class III quality grades being damaged by mud The construction problem that hinders the implementation of PHC pipe pile core reinforcement can ensure the realization of the project construction node target, and reduce the increased construction cost of the subsequent pile replenishment

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