Analysis of the mechanical effect on rapid construction of super-long soft surrounding rock tunnel with high water content

According to the engineering characteristics of Yanmenguan tunnel as: super long,soft surrounding rock with high water content and other geological conditions and requirements on limit time,utilizing stratum-structure mode model analysis is carried out to analysis the stability of Ⅵ surrounding rock;at the same time corresponding theoretical model is built.Numerical simulation is made for construction process,which verified the feasibility of rapid construction of tunnel and provided references for subsequent works.