Jetting and agitating construction method and jetting and agitating device

Abstract

The invention provides a jetting and agitating construction method and a jetting and agitating device for a pile formed by reusing, as a construction material, a sludge mixed with a medium for improving a ground such as a hardener after excluding solid matters with large grain sizes without treating the sludge as an industrial waste or a general surplus soil. In this jetting and agitating construction method, a compressed air and a water are jetted from a third jetting part while rotating and pulling up a multi-tube rod with a plurality of jetting parts from the ground to cut the improved area of the ground in a cylindrical shape by jetting, the cut sludge is discharged to the surface of the ground through an excavated hole, the medium for improving the ground is jetted from the nozzle of the first jetting part, and a reaction material solidifying the medium for improving the ground is jetted from the nozzle of the second jetting part to construct the pile with a specified diameter. The solid matters with the specified grain size or larger are separably removed from the sludge discharged to the surface of the ground, mixed with the medium for improving the ground to form a mixed medium, force-fed by a force-feed pump, and jetted from the first jetting part.

Description

technical field [0001] The present invention relates to a construction method and a jet mixing device for constructing piles by immersing foundation improvement medium in relatively soft foundations, and particularly relates to treating mud as construction waste and general residual soil but not as general residual soil but as A jet-stirring construction method and jet-stirring device for piles and prongs reused as building construction materials. Background technique [0002] Conventionally, in construction and civil engineering, in order to harden a relatively soft ground in the process, a construction method of dipping a ground hardening agent into the ground to harden the ground has been used. Various construction methods have been proposed as such methods for the purpose of ground improvement, and in particular, the jet-mixing construction method is widely used due to its advantages in workability and reliability. [0003] In the jet mixing construction method, a jet m...

AI Technical Summary

Problems solved by technology

If a large amount of mud discharged from the existing jet-mixing construction method is treated as construction waste, there are problems that not only the cost of waste disposal increases, but also the on-site operations become complicated, and as a result, the jet-mixing The overall cost of the construction method increases

[0008] Therefore, the amount of ground hardening material required to construct a pile with a desired diameter is insufficient, and the ground hardening material does not penetrate at a sufficient distance, and a pile with a diameter smaller than the predetermined diameter is actually produced.

[0009] In addition, since the mud discharged from the excavation hole together with the cement slurry must be disposed of as construction waste, the work on site becomes complicated and the cost increases.

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