2Tanimoto, Chikaosa,Yamanaka, Shunichiro,Tsusaka, Kimikazu,Nakane, Tatsuto,Hirano, Minoru,Kanzaki, Hiroshi,Abe, Suguru,Iwata, Shuichi.A study on cutter wear and mechanical properties of rocks in tunneling with a TBM. Zairyo/Journal of the Society of Materials Science, Japan . 2006
3Li Dongliang,Liu Xinrong,Liu Fengming.Analysis on stability of shallow buried and bias tunnel with different slope in loess. Electronic Journal of Geotechnical Engineering . 2014