A study on Gap Parameter and Influence Area of Ground Settlement Using Back Analysis Constructed by Shield TBM with Shallow Depth

천층터널 쉴드TBM에서 역해석을 이용한 Gap Parameter 및 지표침하 영향범위에 대한 연구

Shield TBM tunneling method has been getting the spotlight for urban tunneling. It can be minimized the civil complaint during construction and possible safe tunneling. But the settlement has occurred inevitably due to characteristics of shield TBM equipment. For this reason, the civil complaint can occur in urban areas when tunnel with shallow depth passes through neighboring building or residential area. In this study, the occurrence factors of settlement according to shield TBM tunneling and the tendency of ground settlement by strata condition had analyzed. It is suggested that the practical settlement estimation method and minimizing method of ground settlement under simultaneous backfill grouting condition through measurement results and back analysis data using gap parameter.