A STUDY ON WORKING FACE EFFECT IN TUNNEL EXCAVATION

摘要

The working face effect in tunnel excavation is investigated by simulating a single circular tunnel excavation using the finite element program PLAXIS. A curve showing runnel convergence versus distance away from the working face is obtained from the modeling, which is represented by three functions. The curve is then applied to a case study on simulating the excavation and support of an actual tunnel by using the discrete element code, UDEC.