摘要
强震引起支护结构失效、边坡失稳的事故频发,因此对边坡支护结构进行抗震性能分析具有重要价值。以四川省乐山市风池山某边坡支护工程为背景,选取该边坡地层分布较为不均匀及存在薄弱夹层的典型剖面,建立了未支护结构和支护结构的振动台试验模型,对比分析了支护结构对边坡抗震性能影响,其中,支护结构综合采用了矩形格构框架梁、预应力锚索、抗滑桩等多级组合支护形式。试验中充分考虑了边坡土层非均质性,以及薄弱夹层对计算结果的影响,得出了一系列关于坡面位移、坡体加速度,以及支护结构动力响应等方面的重要结论。
The seismic characteristic analysis of slope reinforced by retaining structure is of great significance because of the frequent accidents of slope failure and retaining structure failure caused by strong earthquakes.Based on a slope reinforced by a retaining structure,which is located at Fengchi Mountain in Leshan city,Sichuan province,a typical section of slope with anisotropic layers and soft intercalated layers was selected to build a set of shaking table model tests.Two models,one is with retaining structure and the other is without retaining structure,are established to analyze the seismic effect of the retaining structure on the slope.Among them,the retaining structure consisted of the rectangular framework beam,the pre-stressed anchor cable and the anti-slide pile.In the model test,sufficient consideration is paid on the anisotropic slope and the effect of the soft intercalated layers on the experimental results.Some significant conclusions are obtained about the displacement,acceleration and other dynamic responses of the slope and the retaining structure.
引文
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