基于 FEFLOW的广州金沙洲地区地下水流场数值模拟研究

摘要

通过概化金沙洲地区的水文地质条件建立了地下水系统的概念模型，然后在地下水数值模拟FEFLOW 软件的支持下，建立了研究区的地下水流数值模拟模型。模拟结果表明：施工降水期间，地下水的流动方向由四周向施工降水中心流动，形成以施工抽水点为中心的降落漏斗，地下水位变化明显，与发生在模拟区内的地面塌陷和地面沉降地质灾害在时间和空间上具有对应性。基于此模拟结果，应严格控制金沙洲区域的工程活动施工降水强度，以有效防止地面塌陷及地面沉降地质灾害的发生。%The paper establishes a concept model of the groundwater system in Jinshazhou area by generalizing its hydro-geological conditions, and then, builds a numerical simulation model of groundwater flow with the help of FEFLOW software. The simulation result shows that groundwater flows from the surroundings to the center during the process of lowering groundwa-ter level, and forms a cone of depression whose core is the location of the pump. The variation of groundwater level is signifi-cant and consistent with the occurrence of land subsidence and geological disasters both in time and space. The result indicates that pumping intensity should be strictly controlled to prevent land subsidence and other geological disasters.