摘要
高填方地基广泛应用于山区工程中,可有效缓解用地紧张问题,但高填方工程存在沉降不均匀问题,严重威胁建筑设施安全。本文以云南省巧家县白鹤滩库区水利移民安置点高填方地基为研究对象,采用时序PSInSAR技术获取高填方地基边坡的形变时间序列,研究其变形规律及影响因素。通过分析可以发现,在空间上,随着填方深度的增大,形变点的形变累计量增加,二者相关系数为0.64;在时间上,边坡变形与降雨相关;南段边坡土层密实度差且透水性强,形变受雨季影响较大。
High-filled foundations are widely used in mountain area construction projects,effectively alleviating the problem of land shortage.However,there is a problem of uneven settlement in high-filled engineering,which seriously threatens the safety of building facilities.This paper takes the high-filled foundation of the water conservancy resettlement site in the Baihetan Reservoir Area of Qiaojia County,Yunnan Province as the research object,uses the time series PSInSAR technology to obtain the deformation time series of the high-fill foundation slope,and studies its deformation models and influencing factors.In space,with the increase of the filling depth,the cumulative amount of deformation of the deformation point increases,and the correlation coefficient between the two is O.64.In time,the deformation increment is related to rainfall.The soil layer of the southern slope has poor compactness and strong water permeability,so the deformation is greatly affected by the rainy season.
作者
王启贵
胡迎香
黄其欢
Wang Qigui;Hu Yingxiang;Huang Qihuan(Zhejiang HuaDong Mapping and Engineering Safety Technology Co.,Ltd.,Hangzhou 310004,China;School of Earth Sciences and Engineering,Hohai University,Nanjing 210024,China)
出处
《工程勘察》
2023年第10期35-39,45,共6页
Geotechnical Investigation & Surveying
基金
国家自然科学基金:地基InSAR高边坡三维变形提取方法研究(41304025)。
关键词
PSINSAR
沉降监测
移民安置点
高填方边坡
PSInSAR
subsidence monitoring
resettlement site
slope of high fill foundation
