基于失稳机制的岩质路基边坡加固方案优化

以边坡失稳的普遍机制为基础,对边坡岩体的应力环境变迁、表生环境下边坡岩体的演化过程及岩质边坡加固方案优化问题进行了初步探讨。结果表明:坡面卸载诱发的应力场变化决定了边坡失稳的必然性,降水起源的地下水是驱动边坡岩体发生渐进性演变的核心因素;应力场恢复和防水是边坡加固方案优选的首要目标;预应力地锚群应成为岩质边坡加固的首选方案;在坡面设置坚固的防水屏障不仅可以遏制岩体表生演化,而且对防止地锚腱体松弛及防腐也是重要的。

Optimization of Reinforced Project of Rock Slopes Based on Instability Mechanisms

Based on ordinary mechanism of slope instability,stress field change caused by unloading on the slope surface,the evolution process of slope rock mass and optimization of reinforced project of rock slope were probed.Results show that the stress field change caused by unloading on the slope surface decides the inevitability of the slope instability and the groundwater stemming from rainfall is the key factor of driving slope evolution.Stress field recovery and waterproof should be the first target of reinforced project for slope.A multiple prestressed ground anchor system should be the first measure selected for rock slope reinforcement.Stable waterproof barriers constructed on the slope surface not only can resist the rock mass evolution but also are important for preventing the tendons of ground anchors from relaxation and corrosion.