An Application of Micropile to Restrain the Settlement of Structure on the Ground Surface caused by Shield Tail Void

실드테일보이드에 의해 발생하는 지표구조물의 침하 억제를 위한 마이크로파일의 적용

In soft ground tunneling, shield method is very good for safety of neighboring structures. Although shield tunnel method has the merits to minimize the deformation of ground around tunnel, ground deformations occurred until the material grouted in tail void hardens are inevitable. In this study, the effects of micropile used as one method to restrain the settlement of neighboring structures by the tail void are studied by laboratory model tests. As a basic test result, the effective direction of micropile and the restraint rate of settlement by micropile reinforcement are known.