Light duty operations like the excavation of clays and the loading of sand, earth, and gravel, etc.
一般黏土的挖掘和沙、土砾石和装载等轻作业环境。
2
Due to the difference in stress paths between the loading and unloading conditions, it is unsuitable to apply mechanical model under loading condition to stability of tunnel excavation.
The influence of the groundwater, seismic loading and the coupling of the two on the mechanical behavior of the underground excavation in the jointed rock mass is investigated.