CAI Jian, LIU Jie. Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel[J]. 2013, 34(S2).
CAI Jian, LIU Jie. Optimization scheme of three-dimensional excavation of high ground stress soft rock section of Danba hydropower station diversion tunnel[J]. 2013, 34(S2).DOI:
A large three-dimensional model of double hole four dimensional Danba hydropower station diversion tunnel excavation is established
and rock mechanics are calculated by using the Mohr-Coulomb model finite element analysis method and unloading rock mass theory and method
and the effect of stress on tunnel is considered to excavate in different depths of tunnel face
from the hole to a certain depth. The displacement changes of tunnel faces at different key points at each excavation are counted. In comparison
the depth of the best tunnel face propulsion should be selected. Under the propulsion depth
the amount of reserved displacements at different segments and locations of holes is counted to provide data support of necessity of advanced support so as to ensure the construction process successfully. It provides references for other similar engineering design.