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.