压采条件下地下水位恢复对沈阳市地下工程安全影响分析

在分析沈阳市水文地质条件的基础上，建立地下水流二维数值模型，并对不同压采条件下地下水流场及降落漏斗的变化进行预测。结果显示，合理压采地下水能够有效减缓区域地下水位下降及降落漏斗扩大等问题，但过分限制地下水开采会导致地下建筑渗水或被淹等新的环境地质问题。分析表明可安全开采时间与压采比例呈对数关系，通过二者的对数回归曲线可进一步推求规划期内地下水资源的安全压采比例，在保障地下工程安全水位埋深的条件下，实现区域地下水位的顺利恢复。

The Impact of Water Table Recovery by Reducing Groundwater Abstraction on Underground Project Safety in Shenyang City

This research based on the analysis of the hydrogeological condition of Hun river’s alluvial and flood fan, built the two dimensional numerical model of the groundwater, and then predicted the groundwater flow field and depression cone changes under different compressive exploitation conditions .The result indicated that: reasonably compress the exploitation of groundwater can effectively retard the declining of region groundwater level and the cone of depression to expand, while excessively restrict the exploitation will result new environmental geology problem, such as the underground building permeable or flooded and so on. Analysis shows that the securely exploit time and compressive ratio present a logarithmic relation, through the logarithmic regression curve, we can further ascertain the safety groundwater compressive ratio during the planning period. In ensuring the safety water depth of underground engineering conditions, successfully achieve the recovery of regional underground water level.