For friction-type anchor general, pull-out resistance is exhibited by only fixing length frictional resistance. In order to ensure sufficient pull-out resistance excessive length and number of anchor is required. Thereby, including pressure-type and hybrid-type anchor is required. However, the standards for friction-type anchor are established in most of the national standards but specific design method for pressure-type and hybrid-type anchor is not been established. In this paper, we review behavioral characteristics of the hybrid-anchor body expanded in two stages using finite element analysis under the underground condition.

• 박정규((주) 포스코건설 기술연구소 과장, 토질 및 기초기술사) | Park Jung Gyu
• 최영우((주) 장평건설 기술연구소 차장) | Choi, Young Woo
• 김남균((주)삼안 연구개발원 대리) | Kim, Nam Kyun
• 장순호((주) 포스코건설 기술연구소 대리) | Jang, Soon Ho