The paper discusses the generation mechanism of shallow tunnel roof rock mass displacement, proposes the displacement generation of highway tunnel surrounding rock have not only relevant with geological factors, but also with the design parameters and construction methods and other factors of tunnel, and find that tunnel construction footage is the the main factor.

After the excavation of powerhouse system, we monitored that the displacement of surrounding rock increases quickly and its space displacement is obvious.

According to the large quantity of in situ measured data,the characteristics and variation laws of displacement and load of bolts in the surrounding rock are studied,and the factors which influence the displacement of surrounding rock and the load along bolts are analyzed as well.

Forecasting evolution of tunnel surrounding rock displacement by ε-SVR;

A method of predicting surrounding rock displacement is set up by using the RBF nerve network s function of powerful nonlinear mapping and fast convergence rate, in which the monitoring data of surrounding rock displacement are chosen.

According to construction,design and on-site conditions,authors firstly set up finite element model of a tunnel,and then describe the distribution of surrounding rock displacement.