INNER PRESSURE RELAXATION BLADE SETTING METHOD

• Main Authors: TOKUNAGA YUKIHIKO, TAGUCHI HIROBUMI, NAGASAKI KOJI, KUBO SHIGERU, TONISHI YUKIO, YOKOI TSUTOMU, HARA TOSHIRO, NOMOTO YOSHIKAZU, ONISHI TSUNEYASU, TSUBOUCHI OSAMU, HOSOMI HISAFUMI, SHINOI TAKAYUKI, OKORI KATSUMI, TAKAHASHI MANABU, MATSUI MICHITSUGU, ONO KIYOTAKA, HIROWATARI TOMOAKI
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a multistage inner pressure relaxation blades setting method to mitigate earth pressure on a rotation axis and a deep mixing device using the inner pressure relaxation blade.SOLUTION: In a deep mixing device, multistage inner pressure relaxation blades 22, which mitigate an earth pressure on a rotation axis 14 by cultivating a foundation 10 around the rotation axis 14, is installed on an upper part of a mixing blade 16 of the rotation axis 14. The inner pressure relaxation blade 22 satisfies L≤a+2b, a≥β/α, D/4≤b≤D/2, where D is diameter of the rotation axis 14, a is width of the inner pressure relaxation blade 22, b is length of the inner pressure relaxation blade 22, L is fitting interval of the inner pressure relaxation blade 22, β is penetration speed per unit time of the rotation axis 14, and α is revolution speed per unit time of the rotation axis 14.SELECTED DRAWING: Figure 1 【課題】回転軸に掛かる土圧を緩和する多段の内圧緩和翼の設定方法とこの内圧緩和翼を用いた深層混合処理装置を提供する。【解決手段】深層混合処理装置において、回転軸１４における撹拌翼１６の上部に、前記回転軸１４の周りの地盤１０をほぐして前記回転軸１４に掛かる土圧を緩和する多段の内圧緩和翼２２を設け、この内圧緩和翼２２は、Ｌ≦ａ＋２ｂ、ａ≧β／α、Ｄ／４≦ｂ≦Ｄ／２を満足するように構成する。Ｄ：回転軸１４の直径、ａ：内圧緩和翼２２の幅、ｂ：内圧緩和翼２２の長さ、Ｌ：内圧緩和翼２２の取り付け間隔、β：回転軸１４の単位時間当たりの貫入速度、α：回転軸１４の単位時間当たりの回転数とする。【選択図】図１