Stability Analysis of Shallow and Bias Loess Tunnel Based on Finite Difference MethodLi Yongbing, Binglei Li, Guanyu Hua, Xinran Jia, Yanqiao Chen and Tanzeng ZhangE3S Web Conf., 131 (2019) 01027DOI: https://doi.org/10.1051/e3sconf/201913101027