摘要
根据膨胀土边坡破坏的特点,以云南广大线扩能改造工程云驿隧道段膨胀土边坡为依托,通过现场监测、理论分析、PLAXIS岩土有限元软件计算得到边坡最优支护时间,并与现场实测数据进行对比验证。分析表明：基于渗流路径土体软化方法计算得到的边坡滑动失稳临界时间为1.5个月左右,与现场实测时间基本一致,并且计算得到的边坡达到临界状态时的水平位移小于实测得到的水平边坡位移,计算偏于安全,可用于对膨胀土边坡最优支护时间进行计算。
According to the characteristics of expansive soil slope failure,and based on the expansive soil slope of the Yunyi Tunnel section on Guangtong-Dali Expansion Project,the optimal retaining time of slope is calculated by monitoring,theoretical analysis and Plaxis geotechnical finite element software,and with the field measured data for comparison and verification.The results show that the critical time of slope instability is about one and a half months,which is approximately the same as that of the measured results.And the calculated horizontal displacement of the slope reaching the critical state is smaller than the measured one,for the reason that calculated biased to safety and it can be adopted to calculate the optimal retaining time for expansive soil slope.
作者
刘金元
周和祥
邢发红
林大富
李孟豪
LI U Jin-yuan;ZHOU He-xiang;XING Fa-hong;LIN Da-fu;LI Meng-hao(China Railway 21 Bureau Group Sixth Engineering Co. Ltd. , Beijing 101111 ,China;School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处
《公路》
北大核心
2018年第6期58-62,共5页
Highway
基金
国家重点研发计划,项目编号2016YFC0802203-1
关键词
膨胀土
边坡
渗流软化
最优支护时间
expansive soil
slope
seepage softening
optimal retaining time
