The comprehensive effect of partial acidlity of working medium , flowing status of fluid , nocuous material in atmosphere , together with the overlong usage , largely increased the corrosion rate and caused the leakage 结果表明，泄漏的主要原因是焊接缺陷导致焊缝区发生缝隙腐蚀，而工作介质的局部酸性、流体的流动形态、大气中有害物质、温差应力等综合作用，加上使用期过长等加剧了腐蚀，导致该塔泄漏。
2.
In the process of construction , some special geological hazards will be met because of the great depth and long distance , such as high external waterpressure , watergushing , high geostress , rockburst , high geotemperature and nocuous gas and so on . these geological hazards become the main restricted factors of tunnel construction 大埋深将使隧洞开挖施工时遭遇到如高外水压及高压涌水、高地应力及岩爆、高地温、高瓦斯有害气体等一系列地质灾害问题，这成为制约深埋隧洞建设快速发展的主要因素。
