AN ANALYTICAL STUDY OF THE LONG-TERM LOAD ACTING ON SHIELD TUNNEL IN A CONSOLIDATING SOFT CLAY

Abstract

Various field investigation with laboratory tests on undisturbed samples were carried out to examine and confirm possible causes of a damaged shield tunnel, inferred by the observations of centrifuge model tests. A series of elasto-plastic coupled FEM analyses were also conducted to examine the influences of various factors, such as the thickness of soft clay and hydraulic boundary conditions of lining, on the long term lining load.