A movable steel casing and a construction method for cast-in-situ piles using the steel casing

Abstract

Disclosed are a moving steel casing and a cast-in-place pile construction method using the same. The moving steel casing is formed by butt-splicing a front semicircular tubular wall and a rear semicircular tubular wall. The front semicircular tubular wall and the rear semicircular wall are aligned. A lower casing and an upper casing are in top-bottom alignment and are fixedly connected through pins inserted into the upper and lower casings from top to bottom. A lift ring is welded at the top of each pin. The front and rear tubular walls are pulled out respectively one by one after the cast-in-place pile is cast, so that the problem that the conventional integrated steel casing guarantees no pile base quality is avoided. Through the split structure, the steel casing is easy to pull out whenever concrete finally sets and pulling out the steel casing in the later stage is not difficult in construction anymore.

Description

technical field [0001] The invention relates to a steel casing and a construction method for a cast-in-situ pile using the steel casing, in particular to a movable steel casing that can be split into two halves and a construction method for using the steel casing to carry out a pouring pile. Background technique [0002] The steel casing is a casing set up during the construction of cast-in-situ piles to protect the pile holes, prevent the holes from collapsing, and avoid affecting the construction progress and safety. The steel casing has the functions of stabilizing the hole wall, preventing hole collapse, isolating surface water, guiding the drill bit, fixing the pile position, and protecting the original ground during operation. [0003] The structure of the commonly used steel casing is usually a whole composed of steel plates, and the joints are welded and connected. The steel casing of this structure is in the construction process of the cast-in-place pile, and the st...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a movable steel casing and a construction method for cast-in-situ piles using the steel casing. It is necessary to solve the problem that the existing integral steel casing must be set aside before the initial setting of the pile foundation concrete in the construction of the existing integral steel casing, resulting in steel The technical problem that the concrete around the casing is easy to collapse and thus reduce the quality of the pile foundation

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