膨胀土边坡失稳治理方案设计

依托某桥梁病害处治工程,结合边坡失稳机理和边坡形态等要素,采用局部卸土＋抗滑桩整体治理方案,介绍了抗滑桩设计中滑坡剩余下滑力的计算方法、抗滑桩的内力计算及配筋;考虑膨胀土在干湿交替变化时强度显著降低,滑坡处治方案中还提出了辅助措施,包括岸坡排水和坡面隔水保湿。

Design for the governing scheme of landslide instability with expansive soil

Based on the bridge disease processing project,combining with landslide instability mechanism and landslide morphology and other factors,applying partial unloading soil＋overall anti-slide pile governing scheme,it introduces the calculation method of surplus down-slide in anti-slide pile design,internal force calculation and reinforcement of the anti-slide pile,proposes supplementary measures in landslide governing scheme by considering the obvious strength reduction under the condition of alternation of wetting and drying for the expansive soil.The supplementary measures include drainage of bank slope and slope water-barrier moisturizing.