Abstract
Rock type slurry shield method is used for pipe jacking in various rocks. In excavating soft rock, faceplates of this type are often blocked by sticky rock chips leading to the difficulties in excavation. The purpose of this study is to research the cause of the blockage phenomenon and the method for preventing the blockage phenomenon. The artificial soft rock was used for the specimen in order to standardize the experimental condition. Flow to the cutting face and reducing of the length of disk cutter were effective for the defensive measure of the blockage phenomenon from the investigation of the mechanism which discharge sticky rock chips. Flow of slurry in chamber and the cutting face were investigated in order to apply these results to the real machine, and the situation was grasped.
