GROUND REINFORCEMENT METHOD

• Main Authors: IMOTO ATSUSHI, OKABE TADASHI, MORISE TAKASHI, SHIMAMOTO KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 20.09.2018
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

PROBLEM TO BE SOLVED: To provide a ground reinforcement method capable of reliably driving a rock bolt to a target ground even if the target ground is very fragile.SOLUTION: A reinforcement method of a target ground for driving a rock bolt to the target ground in the periphery of a tunnel so as to restrain a deformation is provided. The method comprises steps of drilling a hole 1 to be used for injecting filling materials in the direction of driving the rock bolt, injecting such filling materials 11 that can be drilled the hole after hardening, drilling a hole 2 for inserting a rock bolt into the area where the filling materials have been injected, and inserting and fixing the rock bolt 3 into the hole.SELECTED DRAWING: Figure 1 【課題】対象地盤が非常に脆弱な場合でも、確実にロックボルトを打設することが可能となる地盤補強方法を提供する。【解決手段】トンネル周囲の対象地盤の変形を抑制するためにロックボルトを打設する地盤補強方法である。そして、ロックボルトを打設する方向に向けて注入孔１の削孔を行う工程と、注入孔に硬化後に削孔可能な充填材１１を注入する工程と、充填材が注入された領域内にロックボルト用の挿入孔２を削孔する工程と、挿入孔にロックボルト３を挿入して定着させる工程とを備えている。【選択図】図１