土砂地山における双設トンネル掘削時の挙動

Abstract

To obtain basic data served to the design methods of sandy ground twintunnels, a series of laboratory two-dimensional model tests were performed by usinga device which was designed to simulate tunnel excavation and at the same time tobe able to measure the earth pressure acting on tunnel linings. From the testresults, it is found out that the mechanical interaction of two tunnels depends notonly on the spacing between two tunnels but also on the overburden.