Construction method convenient for breaking pile head of cast-in-place pile

Abstract

The construction method comprises the steps that before a cast-in-place pile reinforcement cage is installed and concrete is poured, an isolation pipe is installed in a to-be-broken section of the cast-in-place pile head, the outer diameter of the isolation pipe is matched with the inner diameter of the reinforcement cage, and the length of the isolation pipe is not smaller than the height of the to-be-broken section; the bottom of the isolation pipe is flush with the bottom of the to-be-broken section; after the isolation pipe is installed, concrete is poured into the cast-in-place pile reinforcement cage to the top of the cast-in-place pile reinforcement cage, and the concrete formed in the isolation pipe of the to-be-broken section is a cast-in-place pile head; after the strength of the concrete meets the breaking requirement, a plurality of wedge holes are evenly formed in the bottom of the pile head of the cast-in-place pile in the circumferential direction, and a wedge is driven into each wedge hole till the pile head of the cast-in-place pile is broken by the wedges; and the broken cast-in-place pile head is hoisted out, and breaking of the cast-in-place pile head is completed. The main reinforcement of the cast-in-place pile head is effectively prevented from being damaged in the breaking process, and the time for breaking the cast-in-place pile head is remarkably prolonged.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method which is convenient for breaking the head of a cast-in-place pile. Background technique [0002] In order to ensure the quality of the pile body during the construction of the cast-in-place pile, it is generally required to overfill more than 50 cm according to the design specifications, and the overfilling part is the head of the cast-in-place pile. . The traditional construction methods for breaking the pile head of cast-in-place piles include mechanical breaking and manual breaking. When using mechanical breaking, the work speed is faster, but due to the high technical level of the mechanical operator, a little carelessness in the breaking process will cause damage to the cast-in-place pile. The main reinforcement of the pile head is damaged or the main reinforcement of the pile head of the cast-in-place pile is broken. During t...

AI Technical Summary

Problems solved by technology

The construction methods of traditional cast-in-place pile head breaking include mechanical breaking and manual breaking. When using mechanical breaking, the work speed is faster, but due to the high level of technical requirements for mechanical operators, a little carelessness in the breaking process will damage the perfusion The main reinforcement of the pile head is damaged or the main reinforcement of the pile head is broken. During the mechanical breaking process, due to the difficulty of controlling the mechanical strength, the breaking is often insufficient or over breaking, which makes it difficult to control the design elevation of the filling pile top and the pile top flatness after breaking. The lack of stuffing caused by mechanical removal requires manual secondary treatment, which is time-consuming and laborious; the method of using traditional manual removal of cast-in-place pile heads is to use manual and small auxiliary equipment to complete the joint operation. Compared with mechanical removal, the overall efficiency is higher and the quality can be guaranteed. , but when the concrete in the broken cast-in-place pile head strips the main reinforcement of the cast-in-situ pile head, it will still damage the main reinforcement of the cast-in-place pile head, especially when the super-filling ring cutting process at the top of the pile is performed, the main reinforcement may be cut, and the manual removal of the cast-in-place pile slow head

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