A CASE STUDY OF FEM ANALYSIS ON GROUND REINFORCEMENT USING HORIZONTAL JET GROUT ROOFING IN SOFT GROUND TUNNELING

연약 지층 터널의 보강공법에 관한 FEM 해석 사례연구

This paper presents the FEM anlysis results performed to assess the applicability of Horizontal Jet Grout Roofing, and of ground improvement methods for tunneling in soft ground. Horizontal Jet Grount Roofing Method is applicable to ensure the stability of tunnel face in non-cemeted alluvial strata under high ground water pressure. For applying this method, to ensure the reliability, the Horizontel Jet Grout Roofing should be double lined with pre-grouting to reduce the water inflow during the jet grouting.