Study on TBM boring technique for construction of super long tunnel

According to complex geological condition in Qinling tunnel which is constructed by using TBM method,based on analysis of TBM method and construction technology,the relations between progress in line Ⅰ of Qinling tunnel and geology,and between equipment maintenance and management are analyzed.The method to increase utilization of work time is proposed. Therefore experience of open TBM used in tunnel construction is accumulated in China.