惠罗高速公路罗甸互通边坡倾倒变形机理与加固效果分析

Analysis on the Deformation Mechanism and Reinforcement Effect of the Reclining Slope in Luodian Interchangeable Three-dimensional Intersection of Huishui—Luodian Expressway

倾倒变形是河谷地区层状岩质边坡失稳的一种典型变形破坏方式,是西南地区高速公路建设中不可忽视的工程地质问题。针对惠罗高速公路罗甸互通施工过程中AK2+910.000~BK0+382.283段左侧边坡发生倾倒拉裂变形,通过地质结构分析及理论计算,进行了边坡倾倒变形机理研究。在此基础上,提出了"以抗滑桩固脚+放缓边坡及加强边坡排水"的综合治理措施,治理工程实践表明,措施合理有效,边坡变形趋于稳定。

The toppling deformation is a typical deformation damage form for the instability of layered rock slope in the valley area, which is the engineering geological problem that cannot be neglected in the construction of the southwest expressway. Aiming at the toppling and tension deformation of the left slope of AK2 ＋ 910. 000 - BK0 ＋ 382. 283 section in the construction process of Luodian interchangeable threedimensional intersection of Huishui--Luodian expressway, the mechanism of slope toppling deformation was studied by geological structure analysis and theoretical calculation. On this basis, the paper puts forward the comprehensive control measures of ＂anti-slide piles ＋ slowing slope and strengthening slope drainage＂, which is proved reasonable and effective by the control engineering practice and the slope deformation is tend to be stable.