摘要
以郑州地铁14号线盾构隧道施工为工程背景,基于郑州地区粉质黏土弱湿陷性地层,通过对盾构施工过程中60组地表沉降现场实测数据的分析研究,并借助线性回归的方法,分别引入系数α,β以修正地表最大沉降量以及沉降槽宽度,得到适用于郑州地区粉质黏土弱湿陷性地层的Peck沉降预测公式。结果表明:当修正系数α介于0.33~0.73,β介于0.6~1.0时,Peck沉降预测公式经过修正后所绘制的地面沉降曲线更接近现场实测数据。
Taking the shield tunnel construction of Zhengzhou Subway line 14 as the engineering background,based on the silty clay weak collapsible stratum in Zhengzhou area,60 groups of measured data of ground surface subsidence during shield construction were analyzed and studied.With the help of linear regression method,αandβwere introduced to modify the maximum surface settlement and the width of settlement trough,and Peck settlement prediction formula for weak collapsible silty clay strata in Zhengzhou area was obtained.The results showed that whenαwas between 0.33 and 0.73 andβwas between 0.6 and 1.0,the ground settlement curve drawn by Peck settlement prediction formula after correction was closer to the field measured data.
作者
朱连臣
ZHU Lianchen(The 5th Engineering Co.,Ltd.of China Railway 25th Bureau Group Co.,Ltd.,Qingdao,Shandong 266000,China)
出处
《施工技术》
CAS
2020年第11期83-86,共4页
Construction Technology
关键词
地铁
地表沉降
统计分析
PECK公式
回归分析
subways
surface subsidence
statistical analysis
Peck formula
regression analysis
