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현장인발시험을 통한 제거식 포스트 텐션 쏘일네일의 거동특성 평가
박시삼(Sisam Park),최형진(Hyung-Jin Choi),박주석(Joo-Suck Park),김응수(Eung-Soo Kim) 한국지반신소재학회 2013 한국토목섬유학회 학술발표회 Vol.2013 No.4
The general removable soil nailing support system, however, may result in excessive deformations particularly in an excavation zone of the existing weak subsoils. Post-tensioning 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. In this study, a newly modified soil nailing technology named as the RTSN(Removable post-Tension Soil Nailing), is developed to reduce both facing displacements and ground surface settlements in top-down excavation process as well as to increase the global stability. Up to now, the RTSN system has been investigated mainly focusing on an establishment of the design procedure. In the present study, field pull-out tests are carried out to investigate the behavior characteristics of the removable post-tension soil nailing system.
박시삼(Sisam Park),최형진(Hyung-Jin Choi),박주석(Joo-Suck Park),김응수(Eung-Soo Kim) 한국지반신소재학회 2012 한국지반신소재학회 학술발표회 Vol.2012 No.11
The conventional soil nailing system may result in excessive deformations particularly in an excavation zone of the existing weak subsoils. Pre-tensioning the soil nails then, could play important roles to reduce deformations mainly in 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 system has been developed and used. Therefore, a new soil nailing technique called Removable Post-tensioned Soil Nailing(RPSN) system has been developed in the current study. In this study, an investigation of the RPSN system has been conducted by carrying out field measurement. Hence, the RPSN system can reduce ground displacement and enhance stability of the soil nailed walls.