Paper Title
Environmental Effects of Tunnel Drilling on Soil Layers in Different Parts of Iran

Tunnels are one of the most important infrastructures of each developing country. Regarding to geographical situations, geology, development, and expansion of industrial and agricultural centers and cities will not be possible without drilling tunnels. And it is important to pay special attention to this infrastructure. But drilling tunnels or totally drilling has some adverse environmental effects such as air pollution, groundwater pollution, increasing noise, evacuation and accumulation of bran, traffic problems, earth summit possibility, earthquake, and land sliding possibility. Key words - Tunnels, noise, environmental effects, air pollution, groundwater pollution, earth summit