Pile foundation construction method

Abstract

The invention discloses a pile foundation construction method. The method comprises the following steps of: 1) placing a steel protecting sleeve into a ground to be constructed, and drilling on the ground defined by the steel protecting sleeve to form pile holes and a protecting wall adhered to an inner wall of the steel protecting sleeve; 2) placing isolators, each of which the diameter is smaller than that of each pile hole, into the pile holes; 3) pouring cement concrete into the pile holes with the isolators, wherein during pouring, easily-broken connecting components on a fixing component are broken, two connecting components are separated, sections of a connecting ring are separated, and separating bodies connected with the connecting components and the connecting ring are driven to adhere to the protecting wall; 4) applying upward pulling force to a rigid isolating component, wherein the easily-broken connecting components in the separating bodies are broken, a first plate body is separated from the rigid isolating component, the rigid isolating component is pulled out, and the first plate body is retained in a pile foundation; and 5) applying upward pulling force to the steel protecting sleeve to pull the steel protecting sleeve out. The steel protecting sleeve and the rigid isolating component can be repeatedly used by the method, so the construction cost is greatly saved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a pile foundation construction method. Background technique [0002] Bridge pile foundation construction is a very important link in the bridge construction process. According to the construction method, the pile foundation is divided into bored piles, driven piles, static pressure piles, immersed tube piles, explosive expansion piles, and pipe column piles. Among them, in the pile foundation construction method of borehole grouting, in the prior art, steel casings are generally used as construction auxiliary devices, and the steel casings are generally designed to enter the soil at a depth of about 10m to 60m. During construction, a vibratory hammer is usually used to drive the steel casing into the soil layer, and then a large drilling machine and a large punching machine are used to construct holes in the area surrounded by the side wall of the steel casing. Afte...

AI Technical Summary

Problems solved by technology

The existing technology is limited by its own construction method. After the cement concrete is poured into the pile hole, the steel casing cannot be pulled out, and the turnover and reuse of the steel casing cannot be realized.

And if the steel casing is pulled out forcibly, the construction quality will be affected again, so that the steel casing is kept in the pile foundation every time the pile foundation is constructed, and a steel casing can only be used once, and the construction cost is high

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