현장 시험시공을 통한 포스트텐션 제거식 쏘일네일링 시스템의 거동특성 평가

The general soil nailing support system may result in excessive deformations particularly in an excavation zone of the existing weak subsoils. Pretensioning the soil nails then, could play important roles to reduce deformations mainly in an upper part of the nailed-soil excavation system as well as to improve local stability. Moreover, soil nails are installed underneath roads, underground structures, and subway structures, thereby resulting in difficulties in nail removal after completion of temporary soil nailed walls. Hence, to date, in order to solve the technical difficulties and avoid legal issues related to the construction of soil nails underneath the surrounding areas and structures, the removable soil nailing method has been developed and used. Therefore, a new soil nailing technique called Post-tensioned Removable Soil Nailing (PTRN) system has been developed in the current study. In this study, an investigation of the PTRN system has been conducted by carrying out field measurement. Hence, the PTRN system can reduce ground displacement and enhance stability of the soil nailed walls.