湖南山区高速公路高边坡稳定性分析与控制技术

Stability analysis and control technology of high slope of Hunan mountainous highway

基于高风化岩层的边坡极易发生滑坡,该问题会给基础设施与人民生命财产安全带来很大威胁。本文以永吉高速八标项目为背景,系统分析滑坡的破坏模式与破坏机理,阐述相关防护措施,并运用FLAC3D软件进行数值模拟,分析在不设置支护结构与设置锚杆、抗滑桩支护结构的情况下永吉高速公路风化高边坡的稳定性。数值模拟结果表明:采用上述方案能够有效抑制滑坡,使得坡角处的最大滑移量降低80%,由9 m减少到1.8 m。现场位移监测结果表明:支护达到了预期的效果。本文研究成果可为类似工程提供借鉴与参考。

Slopes based on highly weathered rocks are prone to landslides,which will pose a great threat to infrastructure and people’s life and property safety.Based on Yongji High-speed Eight-standard Project,in this paper,the damage mode and damage mechanism of landslide is systematically analyzed.The relevant protective measures are expounded,FLAC3 D software is used for numerical simulation to analyze the stability of weathered high slope of Yongji Highway without supporting structure,anchor bolt and anti-slide pile supporting structure.The numerical simulation results show that the above scheme can effectively suppress the landslide,which reduces the maximum slip at the angle of the slope by 80%and reduces it from 9 m to 1.8 m.Field displacement monitoring results show that the support has achieved the desired effect.The results can provide references for similar projects.