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本文以天津某群井抽水试验为例,通过分析场地范围内水文地质及工程地质条件,利用Processing Modflow建立了天津某深基坑降水与地面沉降耦合模型。根据群井抽水试验的实测数据,反演得出模型中的有关参数。利用修正后的参数及模型,预测不同地连墙深度条件下基坑降水对周边环境造成的影响,通过对比分析,为支护设计提出合理建议,取得了良好的效果。
In this paper, a group of well pumping test in Tianjin was taken as an example. By analyzing hydrogeology and engineering geological conditions within the site, a coupled model of precipitation and land subsidence for a deep foundation pit in Tianjin was established by using Processing Modflow. According to the measured data of well pumping test, the relevant parameters in the model are obtained by inversion. The modified parameters and models are used to predict the impact of foundation pit dewatering on the surrounding environment under different wall depths. Based on the comparative analysis, reasonable suggestions are put forward for the support design and good results are obtained.