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为探究大型滑坡治理中框架式抗滑桩的受力机理,采用ANSYS有限元计算及模型试验方法,对比分析了框架式双排抗滑桩的内力和变形特征。建立了能反映框架式双排抗滑桩空间效应的有限元模型,并运用相似理论构造了室内试验模型,对比分析了数值模拟和室内模型试验结果。结果表明:模型试验与数值模拟结果总体趋于一致;前、后排桩身弯矩存在反弯点,其最大值出现在滑动面处,后排桩起到主要的抗滑作用;纵向框架梁的最大弯矩值在桩、梁交接处,横向框架梁对抗滑桩起到了很好的变形协调作用,在以边桩为拱脚处表现出明显的土拱效应;对比分析验证了框架式抗滑桩具有土拱-桩-梁空间协同受力特性及变形规律。
In order to explore the stress mechanism of frame-type anti-slide piles in large-scale landslide control, the internal force and deformation characteristics of frame-type double-row anti-slide piles were analyzed by ANSYS finite element method and model test method. The finite element model which can reflect the space effect of frame-type double-row anti-slide piles was built and the indoor test model was constructed by using the similarity theory. The numerical simulation and indoor model test results were compared. The results show that the results of model tests and numerical simulations are in general consistent. The bending moment of the front and rear rows of piles has an inflection point, the maximum appears at the sliding surface and the rear piles play a major role in anti-sliding. The maximum moment value of the pile at the junction of pile and beam has a good effect of deformation and coordination on the anti-slide pile, and the obvious arching effect is obvious at the side of the pile. The comparative analysis shows that the frame type anti- Sliding Piles with Synergistic Forces and Deformation Rules of Soil Arch - Pile - Beam.