Due to the flat arched structure usually adopted in single-arch four-lane highway tunnels,the distribution of the secondary stresses in the surrounding rock mass after tunnel excavation is non-uniform and the reinforcement effect of the primary reinforcement elements is poor.

With the rapid development of tunnel construction in China, the four lane road tunnel emerged in recent years.

In this paper, by the large scale model tests and FEM, authors study the mechanic behaviour of three lane road tunnel under tectonic stresses.

Research on effect of environment in highway tunnel on emission of diesel engine;

Similarity study on model experiment for natural ventilation in highway tunnels;

Application of Ground Penetrating Radar in test of highway tunnel quality during construction;