Centrifuge model test on the additional earth pressure due to shield driving in diluvial sandy layer
シールド掘進に伴う洪積砂層における付加土圧発生機構の実験研究

Hitoshi NISHIMURA, Sadao NAKAHASHI, Nobuko KUROKAWA, Hiroshi TANAKA
1997 Proceedings of Tunnel Engineering, JSCE  
To investigate influences on neighboring structures during shield driving, centrifuge tests reported here were performed at a centrifugal acceleration of 70G using 1/70th scale shield machine model in diluvial sandy layer. In a series of the tests where shield machine plate friction, overburden pressure and shield thrusting speed were parameters , earth pressure surrounding a shield machine and bending moment of neighboring existing model piles were measured during shield driving . Based on the
more » ... test results, we evaluated the distribution of the additional earth pressure surrounding a shield machine and relation with the distance from the machine. Behavior of the existing neighboring piles was analytically simulated by using a beam-spring model applied on the additional earth pressure.
doi:10.11532/journalte1991.7.435 fatcat:2jhsztlxh5bw7pr7kok7qq3bvi