摘要
为合理评价深基坑预警等级,以基坑坑顶水平位移监测成果为基础,在开展其变形特征分析的基础上,利用GA-Kalman滤波对变形数据进行过滤处理,提取真实变形量,并通过3类预警判据开展真实变形量的综合预警。实例分析表明:(1)基坑坑顶水平位移具有显著变形特征,且GA-Kalman滤波具有较强的数据过滤能力,能有效提取其真实变形量;(2)SW-08、SW-19及SW-22监测点的最终预警等级为Ⅱ级,SW-23监测点的最终预警等级为Ⅰ级。因此,基坑最终预警等级宜按Ⅱ级预警,即基坑变形存在一般风险,其后续变形具有稳定增加特征,目前处于可控范围内,适当加强监测频率即可。
In order to evaluate the early warning level of deep foundation pit reasonably,based on the monitoring results of horizontal displacement of foundation pit top and the analysis of deformation characteristics,GA-Kalman filter is used to filter the deformation data and extract the real deformation amount.Comprehensive early warning of real deformation is carried out through three types of early warning criteria.The case analysis shows that the horizontal displacement of pit top has significant deformation characteristics,and GA-Kalman filter has strong data filtering ability,which can effectively extract the real deformation.At the same time,the final warning level for SW-08,SW-19 and SW-22 is LevelⅡ,and the final warning level for SW-23 is LevelⅠ.Therefore,the final warning level of foundation pit should be according to levelⅡwarning,that is,there is a general risk of foundation pit deformation.The subsequent deformation has a stable increase,and it is temporarily controllable,and the monitoring frequency can be appropriately strengthened.
作者
王芳芳
罗林
WANG Fangfang;LUO Lin(Shaanxi Railway Institute,Weinan 714000,China;Sichuan Zili Survey Designing Co.,Ltd.,Luzhou 646000,China)
出处
《甘肃科学学报》
2025年第5期131-137,共7页
Journal of Gansu Sciences
基金
陕西铁路工程职业技术学院科研基金项目(KY2022-10)。
关键词
深基坑
多重分形特征
过滤处理
预警判据
预警等级
Deep foundation pit
Multifractal features
Filtration treatment
Early warning criteria
Warning level
