摘要
在雨水较多的山区,半填半挖路基易产生下边坡失稳,对路基稳定造成的危害极大,为了避免山区半填半挖路基在多雨条件下失稳灾害发生,以宁夏固原G312国道一处半填半挖边坡发生滑坡为例,通过勘查成果资料对边坡稳定性计算,边坡在暴雨、地震工况下,安全稳定性系数分别为0.98、0.96,处于不稳定的状态;详细地分析、验证了变形特征,得出在半填半挖地形条件下,岩土体特性、降雨等是导致半填半挖路基边坡失稳滑塌的主要因素,根据此类滑坡,本文提出了微型钢管桩、挡土墙以及排水、植草等相结合的工程措施进行处置,建议半填半挖路基采用块石透水路基,并做好临山测截排水设计等,以期对区域类似工程问题提供技术参考。
In mountainous areas with a lot of rain,the half-filled and half-dug roadbed is prone to slope instability,causing great harm to the stability of the roadbed.In order to avoid the instability disaster of the half-filled and half-dug roadbed in mountainous areas under rainy conditions,this paper takes a half-filled and half-dug slope at G312 National Road in Guyuan,Ningxia as an example,and calculates the stability of the slope through the survey results.The safety and stability coefficients are 0.98 and 0.96 respectively,which are in an unstable state.The deformation characteristics are analyzed and verified in detail,and it is concluded that under the condition of half-filled and half-dug terrain,the characteristics of rock and soil mass and rainfall are the main factors leading to the instability and collapse of the half-filled and half-dug roadbed slope.According to such landslides,this paper puts forward engineering measures combining micro-steel pipe pile,retaining wall,drainage and grass planting for disposal,and suggests that the half-filled and half-dug roadbed should adopt a block permeable roadbed and do a good job in the design of the survey and drainage in order to provide technical reference for similar engineering problems in the region.
作者
顾小军
肖强
Gu Xiaojun;Xiao Qiang(Ningxia Highway Survey and Design Institute Co.,Ltd,Yinchuan 750000,Ningxia,China)
出处
《绿色科技》
2024年第20期223-226,232,共5页
Journal of Green Science and Technology
基金
宁夏回族自治区自然科学基金重点项目(编号:2019AAC03261)。
关键词
半填半挖路基
变形特征
主要因素
工程措施
half-filled and half-dug subgrade
deformation characteristics
major factors
engineering measures
