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结合上海某深大基坑工程进行专门的多井抽水试验对承压水降水引起的地表沉降进行现场试验研究,实测到了多井抽水条件下地下水渗流场和地面沉降的分布规律。基于地下水渗流理论和多层含水层组抽水引起的沉降计算理论,运用数值模拟手段还原了抽水试验期间场地的地下水流场和场地内各点的承压水头降深与地面沉降的分布情况和抽水试验期间降深影响范围及沉降影响范围,为分析承压水降水引起的沉降研究提供了宝贵的工程实测资料和理论分析依据。
Combined with a deep excavation project in Shanghai, a special multi-well pumping test was conducted to conduct field tests on ground subsidence caused by confined water precipitation. The distribution of groundwater seepage and ground subsidence under multi-well pumping was measured. Based on the seepage theory of groundwater and the settlement calculation theory caused by pumping in multi-aquifer, the groundwater flow field of the site during pumping test and the settlement of subsidence at different points and ground subsidence are reduced by numerical simulation. During the experiment, it deepens the influence scope and the influence range of settlement, which provides valuable engineering measurement data and theoretical analysis basis for the analysis of settlement caused by confined water precipitation.