When there is pyrite-bearing strata in tunnel construction, oxidization of pyrite will result in formation of acidic environment and bring adverse effect on durability of concrete lining.

• 当隧道工程施工遇到含黄铁矿的地层时,黄铁矿氧化形成的酸性环境以及其引发的一系列化学反应会对隧道混凝土衬砌的耐久性带来不利的影响。