天津市区古河道工程特性及对地铁工程的影响

摘要

该文在收集整理天津市区相关水文、河道变迁历史资料的基础上,以岩土工程勘察钻孔、古籍地图、遥感资料相互验证,查清了天津市区各条古河道的空间分布,并对其历史成因进行了系统分析,确定了天津市区古河道的成因类型,填补了天津地区对于古河道分布认识不清的空白;结合天津市古河道的工程地质、水文地质特性以及地铁线路穿越古河道的情况,分析了古河道对地铁工程勘察、设计、施工及后期运营的不利影响,并提出了应对措施建议.%Based on collecting and arranging the relevant historical data of hydrology and river shifting in Tianjin downtown, mutual verification by the drilling of geotechnical engineering investigation, ancient maps and remote sensing data, the spatial distribution of all ancient river channel in Tianjin downtown is find out clearly. And the historical cause is analyzed systematically. The genetic types of the ancient river channel in Tianjin downtown are determined. It fills the gap of unclear understanding the distribution of ancient river channel in Tianjin area;Combined with the characteristics of engineering geology,hydrogeol-ogy and the situation of the subway crossing the ancient river channel, the adverse effects on the metro engineering investigation,design,construction and later operation by ancient river channel are analysed, and some corresponding resolutions and suggestions are proposed.