The results show that concerning the stability of hole in underground, the construction after digging holes has advantages over the digging holes in ground.

Stability recognition of tunnel cavern foundation based on support vector machines with genetic algorithms;

The rock mass foundation is complicated cavern foundation with threemetro cavern.

Through the static and dynamic calculation, on one hand, this paper analyzes the influence of the hole in foundation upon frame-type tunnel bridge, and clarifies the formation mechanism of the crack of frame-type tunnel bridge caused by the foundation s hole.

Currently,the stability evaluation of cave foundation is mostly focus on the quantitative evaluation,such as the collapse mechanism and prevention,while the qualitative assessment is rare.

This paper established a shear failure calculation method for the foundation,which is simple in calculation process,easy to get the rock parameters and serves as a new method for the foundation calculation and for completing the stability study of rock foundation with caverns by comparing it to the punching failure mode.