Abstract
We observed upheavals of the earth's surface during excavating the tunnel at shallow overburden ground with the cast-in-place lining method. But remarkable upheavals have not been generally observed on the same situation with the shield tunneling method. The present paper examined the difference between two tunneling methods by keeping our eyes to the consolidating time of grout materials.
We definited the influence range and considered that shear stresses don't work only on 2 side walls but also on 4 walls in the Terzaghi's earth pressure and calculated subsidence and upheaval limit pressure. Furthermore, We studied the correlation between the ground deformation and the influence range.
