Construction method of cast-in-place pile with combination of full-sleeve and mud protecting wall

Abstract

The invention relates to a construction method of a cast-in-place pile with combination of a full-sleeve and a mud protecting wall. The method includes the steps that a steel sleeve with the inner diameter equal to the designed pile diameter is selected, and the steel sleeve rotates and is vertically pressed into a barrier ground layer through a full-sleeve full-rotation drilling machine; barriers are gradually grabbed from the sleeve out of the ground through a hydraulic punching grab bucket; the steel sleeve rotates and is vertically pressed to an excavation face through the full-sleeve full-rotation drilling machine; the steps are repeatedly executed till the steel sleeve completely penetrates the barrier ground layer; then a corresponding drilling machine is selected according to the conditions of soil layers below the barrier ground layer; the drilling machine performs drilling for forming holes, the mud protecting wall is used, and primary hole cleaning is performed; a drilling machine drill pipe is lifted upwards and detached, and a reinforcement cage is lowered segment by segment till the designed elevation is obtained; a concrete pouring guide pipe is lowered, and secondary hole cleaning is performed; concrete is poured, and meanwhile the guide pipe is lifted up; and after the designed elevation is obtained though pouring, the sleeve is completely pulled out, and construction is completed. The method can well guarantee the pile forming quality, the construction efficiency is improved, and the construction cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of cast-in-place pile construction, and in particular relates to a construction method of cast-in-place piles with a full casing combined with mud wall protection. Background technique [0002] In recent years, cast-in-situ piles have been widely used in the fields of foundation pit support and pile foundation construction because of their advantages such as convenient construction and low cost. The construction of cast-in-situ piles mainly includes the processes of forming holes, mud retaining walls, hanging steel cages, and pouring concrete. The stability of the hole wall directly affects the quality of the cast-in-place pile. Usually rotary drilling rigs or percussion drilling rigs are used for hole forming construction. In the process of hole formation, when encountering bad formations or underground obstacles such as mortar block stones and abandoned concrete blocks, it is necessary to grind (grind wi...

AI Technical Summary

Problems solved by technology

It uses the full casing to clear underground obstacles. After the obstacle is cleared, the casing is pulled out, and then the casing is inserted, and then the construction of the cast-in-situ pile is carried out, which is relatively slow.

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