ABSTRACT
The elastic modulus of surrounding rocks was e9 Pa, the poisson ratio was 0.35, the bulk density was 2e3 N/m3, the lateral pressure coefficient was 0.5 and the cohesion was 5e4. The buried depth of tunnel from YK34+625 to YK34+728 was between 20.98 m and 49.28 m, the buried depth of tunnel from YK38+467 to YK38+693 was between 51.31 m and 103.26 m, and the buried depth of tunnel from YK39+372 to YK39+533 was between 22.09 m and 52.12 m.
