上硬下软复合地层大断面隧道施工技术
: The paper analyzes displacement and supporting force
of the construction metods of the compound stratum with up
hard and below soft with finite element method by the
example of the Basumu tunnel, and puts forward the
corresponding construction methods and supporting
parameters, providing reference for the similar projects.
1、工程概况
八苏木隧道是京包线集宁至包头段增建第二双线重点控制
工程,位于内蒙古高原南缘之大青