黄土地区基坑降水对邻近建筑物影响的评价方法

Evaluation on effect of deep excavation dewatering on adjacent building in loess area

为了研究黄土地区基坑降水对邻边建筑物的影响,采用目标层次结构与模糊数学相结合的综合评判方法,根据黄土地区基坑降水与周边建筑物自身特点,选择土体渗透系数、基坑支护工程安全等级、基础类型等10个指标作为综合评判基坑降水对周边建筑物影响评价的体系指标,将各项指标按隶属度方法划分为4级,把模糊数学应用到基坑降水对周边建筑物影响评价中,构造了科学严谨的综合评价体系,并以实际工程案例进行了验证。结果表明,所提方法能够反映黄土地区基坑降水对邻边建筑物的影响,其评价结果与实际吻合较好。

In order to study the influence of foundation pit dewatering on adjacent buildings in loess area,the parameters,such as soil permeability,security level of foundation support,type of foundation etc.,were chosen to be the evaluation index of dewatering effect of foundation pit on surrounding buildings according to the characteristics of the buildings. Based on the grade of membership method,these indicators were divided into 4 levels. Using the fuzzy mathematics approach,a comprehensive evaluation system was established and validated through practice. The evaluation results are in good accordance with the actual conditions.