《岩土工程勘察规范》(GB5 0 0 2 1- 2 0 0 1)在水 ,土对混凝土腐蚀评价中 ,取消了过去有关隧洞、竖井、水坝为Ⅰ类环境的规定。针对对隧洞、竖井工程如何评价地下水腐蚀的问题 ,该文以工程实例说明地下水对隧洞、竖井腐蚀的物理特性和化学特性 ,并指出了按规范评价的方法要点。 Geotechnical Investigation Regulations (GB5 0 0 2 1 2 0 0 1) In the water and soil evaluation of concrete corrosion, the provisions of the past relating to tunnels, shafts and dams are Class I environments. Aiming at the problem of how to evaluate the corrosion of groundwater in tunnel and shaft engineering, this paper illustrates the physical and chemical characteristics of groundwater on the corrosion of tunnel and shaft by engineering example, and points out the key points of the method.