Simulation is applied to the study on the traffic and transport system of complex underground structure group, which is complicated stochastic process.

The construction of shallow burying and underground excavation large span cavity group under the existed architecture of underground;

Analysis of effects of mechanical parameters on stability of cavern group using parallel evolutionary neural network FEM;

The elastic-plastic finite element analysis on the surrounding rocks of the caverns and the optimization of its construction alternatives;

This is the third part of the paper,highlighting the layout of large caverns and application of NATM,preconsolidation and postexcavation method in construction of large caverns in China.

The stability of caverns is the focus of study on water conservancy and hydropower industry,railways,highways,defense,energy development and reserve,and other fields.

Under these circumstances, the underground caverns with characteristics of large scale and complex spatial arrangement are located close in finite underground space.