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中文摘要：
京沪高速铁路沿线地面沉降除受软土本身性质影响外,主要受沿线地区长期过量开采地下水的影响。结合DInSAR与地面精密水准测量结果,选取京沪高速铁路天津段西青区杨柳青镇沉降异常区（火电厂深部抽水井所致）为研究区域,通过分析抽水井所在部位地质结构和水文地质条件,建立水文地质概念模型,采用Visual Modflow软件对研究区地下水位变化进行数值模拟。在此基础上,结合该地区地面沉降量与地下水位变化间的相互关系,计算出不同开采量、开采时间下的地面沉降量,得出京沪高速铁路穿过部位的沉降量预测,为高铁安全运营采取处理对策提供依据。
英文摘要：
Except the impact of soft soil,the main influencing factor of land subsidence is the long-term over-exploitation of groundwater along Beijing—Shanghai High-speed Railway（BSHR）.Combining with the results of DInSAR and precise ground leveling,taking the land subsidence anomalous area（caused by deep-well pumping in a thermal plant） in Yangliuqing town,Xiqing district of Tianjin for example,through the analysis of geological structure and hydrogeological conditions of the pumping wells region,the hydrogeological conceptual model is established;and the numerical simulation research on groundwater level variation caused by groundwater exploitation is carried out with Visual Modflow software.Based on the research above,according to the correlation between land subsidence and groundwater level variation,the land subsidence under different groundwater exploitation amounts and different exploitation times are calculated;and the land subsidence amplitude and velocity under BSHR are predicted.The countermeasures can be put forward for the safety of high-speed railway according to the research.
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