Abstract
To make the mechanism of shallow tunnel face failure in sandy ground clear and establish the evaluation method of the face stability, gravitational and centrifugal model tests were performed. Also the face stability was analyzed by the 3-dimensional limit equilibrium method, and the result was compared with the experimental one. The relation between the face stability and the overburden was shown through the result of tests and analysis, and the way of elavulating the face stability using the strength parameters of ground, unit weight, and tunnel diameter was proposed.
