Optimization of Thrust Forces for Consecutive Advance of Shield TBM and Validation Test by Scaled TBM Model

Abstract

The research studies a consecutive excavation method to enhance the shield TBM advance rate by using helical segments. A new redistribution of thrust force should be designed for compensating of resting jacks on assembling segment. An optimization process is developed to redistribute thrust forces of the jacks, then sine and linear functions are adopted for optimum solutions. To examine the accuracy of these, a scaled model was manufactured. The force redistribution techniques are demonstrated in the scaled model tests, and consecutive advance processes with controlling TBM jacks are partially validated.