Reinforcing process of removing slag at the bottom of cast-in-place pile

Abstract

The invention discloses a reinforcement process method for pile bottom sediment removal of a pouring pile. The reinforcement process method comprises the following steps: forming at least one sediment removal hole in the top of a pile body, and ensuring that the sediment removal hole extends to a pile bottom sediment layer; installing sediment removal equipment in place, stretching a water tube and a gas tube from the sediment removal hole and enabling tube orifices to approach to a hole bottom position; starting water supply equipment, and carrying out high-pressure water jetting on the pile bottom sediment layer through the water tube to complete primary sediment removal treatment; starting gas supply equipment, charging a high-pressure gas in the pile bottom sediment layer and carrying out the high-pressure water jetting on the pile bottom sediment layer through the water tube and the gas tube, and completing secondary sediment removal treatment through the double processes of high-pressure water jetting and gas lift circulation; pulling away the water tube and installing a grouting tube in situ, starting grouting equipment and the gas supply equipment simultaneously, and carrying out reinforcement treatment on the pile body through a gas-injecting and grouting method; and stopping the equipment when a grout overflows from the orifice of the sediment removal hole. The reinforcement process method disclosed by the invention is capable of realizing efficient and thorough elimination for pile bottom sediments, good in sediment removal effect, and capable of increasing the structural strength of the pile body, meeting safety indexes, and meeting the requirements of construction technical indexes.

Description

technical field [0001] The invention relates to the technical field of building pile foundation construction, in particular to a method for removing slag at the bottom of cast-in-situ piles and reinforcing them. Background technique [0002] The construction methods of bored piles include rotary drilling (positive circulation method, reverse circulation method), percussion drilling, punching and grabbing drilling, diving electric drilling, rotary drilling, long auger and so on. With any one of the above construction methods, the bottom of the pile will inevitably have sediment problems. According to different pile-forming techniques and geological factors, the thickness of pile bottom sediment usually reaches 0.5m ~ 2.5m. my country's "Technical Specifications for Building Pile Foundations" stipulates that for end-supported piles, pile bottom sediment should not be greater than 0.05m. According to long-term According to construction statistics, the unqualified rate of pile b...

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Problems solved by technology

[0004] However, according to actual construction applications, the above hole cleaning methods have certain limitations in the quality of hole cleaning, construction speed, and scope of application, so that after pouring concrete, there are still a considerable number of piles whose sediment does not meet the specification limit. Requirements, at the same time, because the sediment does not meet the requirements, it will affect the strength of the pile body after the pile is completed, and there are potential safety hazards

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