Study on Stress and Deformation of Earth-Rock Cofferdam and Concrete Cutoff Wall on Deep Overburden

Abstract

The earth-rock cofferdam on deep overburden is the main study object. The cofferdam filling and dam excavation process were numerical simulated using FEM code ANSYS .Main research focused on stress and deformation characteristic of cofferdam and concrete cutoff wall during completion and excavation process.Analysis showed that displacements of cofferdam and cutoff wall distribute well in x, y, z directions with acceptable magnitude, stress characteristic values are less than design standard. The results indicate that cofferdam and cutoff wall are safe and stable both in construction and operation.