汝郴高速公路高陡斜坡稳定性分析及治理措施

摘要

The high and steep slope of Rucheng-Chenzhou expressway is located between segment K65+410 and K65+680.Since March 2011,deep displacement had occurred in the slope in need of treatment measures.In this article,a slope model with multiple potential slip surfaces is built on the thorough understanding of the site's geological conditions and the deformation mechanisms.The slope stability under different conditions is calculated with the limit equilibrium method.On this basis,treatment measures are put forward,including cutting slope,surcharge reaction and anchor bolts.The results offer basis for the design of high-steep slope treatment.Within 4 years after the treatment,no large-scale deformation occurred,which indicates that the high-steep slope treatment is successful.%汝郴高速公路高陡斜坡位于公路K65 +410-K65+ 680段.2011年3月以来,该高陡斜坡深部发生位移,并且这些变形在不断发展,需要进行人工治理.通过对斜坡地质环境条件和变形机理初步分析,建立了该高陡斜坡典型剖面的多种潜在滑面的稳定性计算模型,并对该高陡斜坡进行了多滑面多工况极限平衡稳定性分析.在此基础上提出了坡顶削坡卸载、坡脚堆载反压和锚杆加固斜坡浅表的治理方案,可为高陡斜坡治理工程设计提供依据.该边坡在经过治理后至今4a内,没有再发生过大规模变形,证明了该治理方案的合理性.