GROUND IMPROVEMENT DEVICE AND METHOD

• Main Authors: NARATA TOMOYUKI, TAGUCHI HIROBUMI, KAMEI NOBUHIRO, KAWASAKI KENICHIRO, NAGASAWA TAICHI, NOUJIYOU TAKESHI, SAITO TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 05.01.2015
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a ground improvement device and a method, capable of construction even at a job site severe in height restriction, and capable of stably vertically moving a treatment machine having an agitation blade in the ground.SOLUTION: A treatment machine 2 of downwardly projecting a rotary shaft 4 for rotatingly driving by installing an agitation blade 5, is connected to a suspension wire 10c wound on a drum 10a of a winch 10, and the suspension wire 10c is delivered by operating the winch 10, and after excavating the ground B up to the predetermined depth by downwardly moving the treatment machine 2 by controlling an attitude of the treatment machine 2 by a stabilizer 6 installed in the treatment machine 2, the suspension wire 10c is wound by operating the winch 10 while rotatingly driving the agitation blade 5 while supplying a ground improvement chemical S in its ground B via a supply line 8, and ground improvement is executed by agitating and mixing the ground improvement chemical S in the ground B by upwardly moving the treatment machine 2 by controlling the attitude of the treatment machine 2 by the stabilizer 6. 【課題】高さ制限の厳しい現場であっても施工可能であり、撹拌翼を備えた処理機を地盤中で安定して上下移動させることがきる地盤改良装置および方法を提供する。【解決手段】撹拌翼５が取り付けられて回転駆動する回転軸４が下方に突設された処理機２をウインチ１０のドラム１０ａに巻き取られた吊ワイヤ１０ｃに連結し、ウインチ１０を作動させて吊ワイヤ１０ｃを繰り出するとともに、処理機２に取付けられたスタビライザ６により処理機２の姿勢を制御して処理機２を下方移動させて地盤Ｂを所定深度まで掘削した後、その地盤Ｂ中に供給ライン８を通じて地盤改良薬液Ｓを供給しつ撹拌翼５を回転駆動しながら、ウインチ１０を作動させて吊ワイヤ１０ｃを巻き取るとともに、スタビライザ６により処理機２の姿勢を制御して処理機２を上方移動させて、地盤Ｂ中に地盤改良薬液Ｓを撹拌および混合させて地盤改良を行なう。【選択図】図２