Rock Behavior Monitoring of the Excavation in the Nukui Arch Dam

Abstract

The foundation rock of the Nukui arch dam mostly consists of the stiff granite, but high dip faults and low dip joints exsist at the dam site.
Therefore on the planning of the excavation, toppling phenomena and key block failure are concerned.
We have executed the monitoring of the rock behavior for the slope stability against such failure.
In the excavation mesurement data are utilized for the slope protection, for example, the decision of the rock bolt-patterns.
In this paper the plan and result of the mesurement are reported.