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针对路堤下刚性桩复合地基稳定性分析方法仍不够完善的现状,采用数值分析方法对路堤下不同位置桩体的损伤发展过程和破坏模式进行了模拟分析,指出刚性桩对路堤稳定性的贡献因其所处位置不同而具有明显差异,其破坏模式可分为受压破坏、受弯破坏和受拉破坏三类,并根据破坏模式的差异对路堤下的桩体进行了分区和分类。基于极限平衡法基本原理,提出了考虑桩体破坏模式差异的路堤下刚性桩复合地基稳定分析方法,并通过算例与常用的其他四种稳定分析方法进行了对比分析。结果表明:所提出的稳定分析方法与数值分析方法的计算结果最为接近,是合理可行的。
Aiming at the status quo that the stability analysis method of rigid pile composite foundation under embankment is still not perfect, numerical analysis is used to simulate the damage development process and failure mode of pile body under different embankments. The contribution of rigid pile to embankment stability is pointed out Which are located in different places and have significant differences in the failure mode can be divided into three types of compression damage, bending failure and tension failure, and according to the different failure modes of embankment under the pile body partition and classification. Based on the principle of limit equilibrium method, a method of stability analysis of rigid pile composite foundation considering embankment failure mode is put forward and compared with other commonly used four kinds of stability analysis methods. The results show that the results of the proposed stability analysis and numerical analysis are the most reasonable and feasible.