Numerical simulation of exhaust gas convective diffusion from a tunnel portal;

Study on the controlling method of exhaust gas diffusion from a tunnel portal;

According to air diffusion equation,it is a mathematic and physical model of pollutant diffusion for tunnel portal.

Analysis and treatment of complications of cataract extraction using interoperative and postoperative scleral tunnel incision in 712 eyes;

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.

Construction sequence and cost analysis of 24m double line box girders erected at tunnel portal by JQX900 bridging machine;

Research purposes: The discussion is made in this paper on the influencing factors of landslide at tunnel portal and its treatment measure for the purpose of effect control of the landslide at tunnel portal.

Discussions were made of a 32 m span, 900t girder carrying and erecting option in tunnel portal.

Research purposes: Yichang-Wanzhou railway has 159 tunnels and 150 tunnel portals.

Because of the influence of the engineering geologic condition, hydrogeological condition and artificial factor, it is easy to have landslide at tunnel portal.

This paper has studied a rockbolt-lattice strengthening technology and its functional mechanism and construction technology used in ahigh slope of the Xiaowang tunnel portal,this study presents that it s a good method to apply the rockbolt-lattice strengthening technology to strengthen thehigh slope of the tunnel portal.