DEVELOPMENT ON THRUST RAM SYSTEM FOR TUNNEL BORING MACHINE (TBM) BY USING PARALLEL LINK

Tunneling technology by using TBMs is considered as the high progress construction method for hard rock boring. Getting more efficient, safety and quality, extra-large scale TBM technology shall be established. When the tunneling works are obliged to construct under non-stable face conditions, in order to success tunneling in safe, TBM shall be operated under totally controlled information. This paper shows, the laboratory test and analyzed procedure for the relationship between given and generated loads on TBM's thrust rams control system by adopting parallel link with redundant actuators in order to examine the interaction force between rock and TBMs. The positioning accuracy from the test result is within several mm.