Characteristics and classification of surrounding rockmass of diversion tunnel for Rongdi Upgrade Project;

Excavation construction of the transition section of the diversion tunnel in Nuozhadu hydropower station;

Application of genetic algorithm to optimizing blasting parameters for tunnel excavation;

On advance geological forecast of tunnels on karst or varied geological conditions;

Here in China in the field of engineering exploration we do not have feasible m ethods for drilling and sampling in lining tunnel.

Stress on Class tunnel restorations of the first mandibular molar;

The practical method of tunnel entrance landscape design and its design procedure are presented in this paper.

For ensuring the stabilization of slope around tunnel entrance, the tunnel design criterion gives out the definite demands to solpe gradient and excavating high, but these demands are confined only the sort of surrounding rock, can not judge the influence of layer property of surrounding rock and ground water.

Research purposes:The construction of tunnel entrance is the key part of the whole engineering.

By analyzing the project examples and the built projects,the article thinks it is logical and economic to apply firing prestressed concrete lining structure in the high-pressured water tunnel if the condition permits.

Concrete lining of water tunnel is an important step in tunnel construction.

Acting loads of water tunnel and their statistical data are carefully analyzed,and math models are established.