Six prototype field tests (1/8 scale tests) have been conducted in order to determine the lateral resistance of connected-pile foundation for transmission line structures. Test sites, located in the city of Hwaseong in Gyeonggi province, are classified as soft silty clay. These test results reveal failures not lattice structure but either the connected beam or uplift of foundation leg caused by large deformation at silty clay. Test results also show the lateral resistance which is 40∼50% higher than the current foundation type of transmission towers.

• 김대홍(한국전력공사 전력연구원 책임연구원, 공학박사, 구조기술사) | Kim, Dae Hong
• 윤희경(한국전력공사 전력연구원 일반연구원) | Yun, Hee Kyung