Abstract��
Based on experience from the Qinling tunnel on the Xi'an-Ankang Railway and the application of a TBM in the Zhongtianshan tunnel at the Turpan-Korla section of the Southern Xingjiang Railway Line 2, the adaptability of TBMs is analyzed considering the topographical and geological conditions of the Zhongtianshan tunnel. According to the geological parameters and advance rates measured in the survey, design and construction stages, the effects of geological factors on TBM advance efficiency is discussed and an approach for adapting a TBM to geological conditions and improving the advance rate by specific measures is analyzed. The results show that the geological properties of surrounding rock greatly affect TBM advance efficiency and that an effective way to improve advance efficiency includes adopting high-quality wear-resistant cutting tools and increasing the gross thrust of the TBM.
2014, Vol. 51 