摘要
以杭州紫之隧道浅埋暗挖段工程为背景,采用FLAC3D对隧道开挖的全过程进行模拟分析。通过选取不同的土体改良参数,总结土体加固对地表沉降的影响规律,并给出了建议的最佳参数为原状土的150%。通过与实测数据的对比分析表明:沉降计算结果略大于实测结果,车道超载对地表沉降的影响有限,洞身收敛主要发生在竖直方向。
Based on the shallow-buried section of Zizhi Tunnel in Hangzhou city,this paper employs the numerical code FLAC3 D to simulate the entire excavation process. By choosing the different sets of soil parameters,the research draws a general conclusion about the deformation characteristics of ground surface,and gives the best suggested parameters of reinforced soil: 150% of the original soil. According to the comparison between the numerical results and the monitoring data,it shows that: the numerical results of settlement are slightly bigger than monitoring data,the overload of vehicles has a limit influence on the ground settlement,the convergence of tunnel in vertical direction is much larger than that in horizontal direction.
出处
《地下空间与工程学报》
CSCD
北大核心
2015年第S2期713-718,共6页
Chinese Journal of Underground Space and Engineering
基金
上海隧道工程公司资助项目(2014)
关键词
超软弱地层
浅埋暗挖
土体改良
三维数值分析
变形特征
super soft strata
shallow excavation
soil reinforcement
3D numerical analysis
deformation characteristics
