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研究目的:抽水沉降是由于地壳表层土体压缩而导致区域性地面标高降低或损失的一种环境地质现象。作为世界各国日趋严重的主要地质灾害之一,如何在室内真实模拟现场抽水沉降,以及不同土体抽水沉降之间的内在关系的研究,具有十分重要的理论意义和工程应用价值。研究结论:结合南京地铁工程实际工况,采用三维有限元软件ADINA进行建模分析,得出了该工程抽水沉降的模拟结果,结论与现场抽水和室内实验所得结果基本吻合,为抽水引发沉降预测提供了科学的数值依据和较为精确的预测。
Research purposes: Pumped-water deposition is an environmental geologic phenomenon caused by the compression and compression of the topsoil of the crust, which leads to the reduction or loss of the regional ground elevation. As one of the most serious geological disasters in various countries in the world, how to simulate in-situ pumping subsidence and the relationship between pumping subsidence and sedimentation has very important theoretical significance and engineering application value. Research conclusions: According to the actual conditions of Nanjing metro project, the three-dimensional finite element software ADINA is used for modeling and analysis. The simulation results of pumping settlement are obtained. The conclusions are in good agreement with the results of on-site pumping and laboratory tests. Provides a scientific basis for numerical and more accurate prediction.