高速公路填石路堤边坡防护方案分析及变形监控  

Analysis of Slope Protection Scheme and DeformationMonitoring of Expressway Rock-filled Embankment

作　　者：刘惠平 许景钊 郜梦棵 LIU Huiping;XU Jingzhao;GAO Mengke(Guangzhou Salvage Bureau of the Ministry of Transport,Guangzhou 51026,China;Key Laboratory of Special Environment Road Engineering of Hunan Province,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]交通运输部广州打捞局,广州510260 [2]长沙理工大学特殊环境道路工程湖南省重点实验室,长沙410114

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第6期1095-1101,共7页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家重点研发计划(2021YFB2601000)。

摘　　要：基于强度折减理论,对某在建高速公路填石路堤试验路码砌和喷播植草边坡不同工况下的稳定性进行了数值分析,埋设全向位移计对试验路边坡的长期稳定性进行了智能监测和预警.结果表明:一般工况下,有码砌边坡的临界强度折减系数为2.54,无码砌边坡的临界强度折减系数为2.49,均满足规范要求,有码砌边坡稳定性略好;降雨工况下,喷播植草边坡的临界强度折减系数为1.201满足经验条件下1.1的要求,较无码砌方案稳定性略微提升;边坡服役期间,通过智能监测获取的码砌边坡与喷播植草边坡的水平最大位移及位移速度均未超过最大水平位移和水平位移速度的预警值,表明码砌边坡与喷播植草边坡处于稳定状态;一般工况下,码砌边坡和喷播植草边坡累计位移变形差距不大,综合考虑经济、工期等因素推荐采用喷播植草形式.Based on the strength reduction theory,the stability of the test road of a rock-filled embankment of an expressway under different working conditions was numerically analyzed.The long-term stability of the test roadside slope was intelligently monitored and forewarned by embedding an omnidirectional displacement meter,and the stability was judged according to the monitoring data.The results show that under general working conditions,the critical strength reduction coefficient of the slope with code is 2.54 and that of the slope without code is 2.49,both of which meet the requirements of the code,and the stability of the slope with code is slightly better.Under the rainfall condition,the critical strength reduction coefficient of the slope planted with grass by spray seeding is 1.201,which meets the requirement of 1.1 under the experience condition,and the stability is slightly improved compared with the scheme without code.During the service period of the slope,the maximum horizontal displacement and displacement speed obtained by intelligent monitoring did not exceed the warning value of the maximum horizontal displacement and displacement speed,indicating that the coded slope and the sprayed grass slope were in a stable state.Under general working conditions,there is little difference in cumulative displacement and deformation between the slope built by code and the slope planted by spraying grass.Considering the factors such as economy and construction period,spraying grass is recommended.

关 键 词：填石路堤 边坡稳定性 边坡码砌 喷播植草 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]