Research on the experimental test system of TBM gripping-thrusting-regripping mechanism

摘要

The gripping-thrusting-regripping mechanism is the core transmission part of Tunnel Boring Machine (TBM) to fulfill the excavation process in a circulative way. The performance of the mechanism exerts direct influence on the excavation efficiency, the excavation precision as well as the dynamic properties of the whole machine. Targeting at the problem that there are situations where the geological conditions are poor and the TBM is bearing huge impact loads and relevant experiment data are not available for the testing in the excavation site, this paper, based on the working conditions of TBM and similarity theory, intends to propose an experimental test system that simulates the tunneling work of TBM. This system can not only realize the simulation of tunneling work, but also, more importantly, simulate the changes of tunneling load and the physical characteristics variations of surrounding rocks. Therefore, the system can provide experimental support for the research of the load transmission pattern in the tunneling work of TBM, as well as the statics characteristics and dynamics characteristics of the mechanism.