南京地铁南北线主要工程地质问题认识与评价

介绍了南京地铁南北线一期工程的工程概况及工程地质条件.地铁建设场址区沿线地形复杂,地铁要频繁穿过基岩和河漫滩软土及古河床的饱水粉细砂层,由此引发较多的工程地质问题.结合优势面分析理论讨论了南京地铁建设所遇到的主要工程地质问题:区域稳定性问题、砂土液化问题、围岩稳定性问题、工程水害与渗透变形问题、地基不均匀沉降问题,并针对具体问题提出了在地铁施工中的相应解决办法.实践证明,认清工程建设中所存在的工程地质问题并作出科学评价,对工程建设的勘察、施工、设计都是至关重要的.

Assessment on the main engineering geological problems in the south-north line of Nanjing metro

The paper presents the general situation as well as the engineering conditions of the first-period project of the North-South line of Nanjing metro.The topographty is complicated along the metro construction line. It has to cross bedrocks flood basin,the saturated silt and fine sand in ancient riverbeds.And engineering geological problems will be caused:regional stability,sand liquefaction,the stability of surrounding rockmass or soilmass,water inflow and seepage deformation,ground differential subsidences.Using preferred plane theory, these problems are discussed and the countermeasures are given. It has been proved by practices that it is vitally important for the reconnaissance and constructional plan to recognize the engineering geological problems clear and make scientific evaluations.