Construction method for pile-head-expanded bored pile

Abstract

The invention relates to a construction method for a pile-head-expanded bored pile. The construction method mainly comprises the steps of construction preparation, manufacturing of a two-steel-pipe pipe casing, burying of the two-steel-pipe pipe casing, preparation of slurry, forming and cleaning of a hole, hoisting of a reinforcement cage, pouring of underwater concrete, treatment of a pile head and the like. The construction method is convenient to construct, and can flexibly guide emission of the slurry and resource utilization of super-fluid concrete, and the later pile cutting procedure is eliminated, so that damage to a pile body caused by the later pile cutting procedure is avoided. The construction speed is high, and the cost is greatly lowered.

Description

technical field [0001] The invention relates to a construction method for a pile head enlarged bored pile, which belongs to the field of foundation treatment engineering and is suitable for building foundation treatment and pile foundation construction. Background technique [0002] There are two types of bored piles commonly used in engineering at present, mud retaining wall bored piles and casing type bored piles. The construction of bored piles with mud retaining walls is done by positioning and installing the drilling rig, burying the casing at the required drilling position to prevent the hole wall from collapsing, using mud to protect the hole wall when drilling, cleaning the hole, placing the reinforcement cage, and pouring after the drilling is completed. Concrete, concrete curing, cutting piles for overfilled concrete. The construction of the casing type bored pile is positioned and installed by the drilling machine, the hole is pressed into the steel casing, and t...

AI Technical Summary

Problems solved by technology

[0003] Bored cast-in-situ piles have low construction noise, are suitable for building large-diameter piles, and are less affected by terrain; however, the quality of bored cast-in-place piles is greatly affected by construction, and the quality of concrete is difficult to control. Pile cutting is easy to cause damage to the pile body, and the pile head treatment is labor-intensive and time-consuming

[0004] In summary, although the existing bored piles have achieved good construction results under suitable engineering conditions, the existing construction methods of bored piles need to process the pile head, which is labor-intensive and time-consuming.

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