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在考虑南水北调中线工程膨胀土渠坡浅表层干湿循环影响以及深层软弱结构面存在的情况下,利用有限元强度折减法对原始边坡、单桩加固边坡,梁桩组合加固体系边坡进行三维数值模拟,通过分析坡体塑性区发展、土体位移、安全系数等,得到抗滑桩与坡面梁组合加固措施的抗滑机理,并指出梁桩组合加固措施在坡面形成的框架式的柔性支护体系对膨胀土渠坡浅表层以及深层滑塌有很好的抗滑效果,通过与单桩加固措施的对比分析体现了梁桩组合加固体系在加固受干湿循环影响以及软弱结构面控制的膨胀土渠坡的优越性。
Considering the influence of the surface wet-dry cycle of expansive canals on the midline of the South-to-North Water Diversion Project and the existence of deep weak structural planes, the strength of the original slope, the reinforcement of single pile, Three-dimensional numerical simulation is carried out to analyze the anti-slide mechanism of combined measures of anti-slide pile and slope beam by analyzing the development of plastic zone of slope body, soil displacement and safety factor. It is also pointed out that the frame- The flexible supporting system has good anti-skid effect on shallow surface and deep slump of expansive soil cannel slope. Comparing and analyzing with the reinforcement measures of single-pile, it shows that the effect of combined reinforcement system of beams and piles on consolidation by wetting-drying cycle and weak structure Surface control of expansive soil trench slope superiority.