A construction method for a continuous wall of interlocking piles combined with self-protecting drill pipe and steel casing

Abstract

The invention provides a constructing method for a self-protection hole drill pipe and steel casing combined secant pile continuous wall. The constructing method comprises the following steps that 1)a pile top guide wall is firstly constructed; 2) a plurality of plain concrete piles are continuously constructed in pile top guide wall holes by means of a self-protection hole drill pipe; 3) withinthe time quantum before initial setting of the constructed plain concrete piles, reinforced concrete piles are constructed between the adjacent plain concrete piles, the reinforced concrete piles areconstructed in a steel casing hole forming manner, and meshing overlapping of the plain concrete piles and the reinforced concrete piles is achieved; 4) after concrete pouring of the reinforced concrete piles is completed, reinforcement cages are instantly inserted into pile body concrete; and 5) construction methods in the steps 2) to 3) are alternately used. The constructing method is simple inoperation, high in degree of mechanization, high in construction speed, capable of shortening the construction period, capable of saving the engineering cost and capable of solving the industry problems troubled underground engineering construction for a long time.

Description

technical field [0001] The invention relates to the field of diaphragm wall construction, in particular to a construction method for a diaphragm wall of a combined occlusal pile of a self-protecting drill pipe and a steel casing. Background technique [0002] With the increasing development of our country's economy, the scale of cities continues to increase, and the land for urban construction is becoming increasingly scarce. Most of the foundation pit projects are located in areas with dense buildings and underground pipelines, and the surrounding environment is complex. Bored piles plus mixing piles, steel cement soil are mostly used. Mixing piles or underground diaphragm walls are three types of support, but these methods have high requirements on the construction site and are more likely to cause quality problems such as leakage. In areas with high environmental protection requirements, other measures are required to meet environmental protection requirements. At present...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for the continuous wall of the occlusal pile combined with self-protecting drill pipe and steel casing, which solves the problem of cold joints, channeling and leakage in the existing construction method of the continuous wall of occlusal piles. Defects such as quality problems

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