摘要
明挖深基坑容易受到屈服位移的影响,导致边坡失稳。通过计算施工过程参数,构建边坡失稳特征提取模型,提取失稳特征并分析边坡失稳动态,对明挖深基坑地铁施工时的边坡稳定性进行分析。根据动态分析结果,计算明挖深基坑地铁施工边坡的承压范围,得到屈服位移的输出状态参数与安全系数的联合分布函数,利用有限元模型完成明挖深基坑地铁施工的边坡稳定性分析。研究结果表明,该方法能够准确地求出块体的滑移时间步数,提升分析结果的可靠性。
The slope stability of open cut deep foundation pit is affected by yield displacement,which leads to slope instability.The stability analysis model of subway construction slope of open cut deep foundation pit is studied.By calculating the parameters of the construction process,the model of slope instability feature extraction is constructed,the instability feature is extracted and the dynamic state of slope instability is analyzed.According to the dynamic analysis results,the bearing range of the subway construction slope of the open excavation deep foundation pit is calculated,and the accurate output state parameters of the yield displacement and the joint distribution function of the safety factor are obtained.The finite element model is used to complete the stability analysis of the subway construction slope of the open excavation deep foundation pit.The research results show that this method can accurately calculate the block slip time steps and improve the reliability of the analysis results.
作者
万达
WAN Da(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou 072750,China)
出处
《现代交通技术》
2020年第2期57-60,共4页
Modern Transportation Technology
关键词
明挖深基坑
地铁施工
边坡稳定性
失稳破坏模式
边界条件
滑移状态
open excavation of deep foundation pit
subway construction
slope stability
instability failure mode
boundary condition
slip state
作者简介
第一作者:万达(1992—),男,本科,助理工程师,研究方向为地铁施工。
