Focusing on an actual slope engineering project,this work firstly developed a three-dimensional finite ele-ment model based on the finite element software ABAQUS,to analyze the optimal single row anti slip pile obtained in a literature which is transformed into a fully buried rigid frame pile based on the principle of equal concrete dosage.The result was compared and analyzed with the optimal single row anti slip pile.It is shown that fully buried rigid frame piles have more anti slip advantages and improve slope stability.Secondly,considering the influence of parameters such as the support constraint conditions at the bottom of the rigid frame pile,the length of the rear pile,and the height of the connecting beam on the slope and pile body,five working conditions are set up for numerical simulation calcula-tions,aiming to provide reference for the design of rigid frame piles.The results indicate that to fully utilize the materi-al properties of the front and rear piles and improve the overall anti-sliding capacity of the rigid frame pile,it is recom-mended that the pile bottom constraints be set as fixed at the bottom of the rear pile and hinged at the bottom of the front pile,or both pile bottoms are hinged.As the length of the rear pile increases,the difference in bending moments between the front and rear piles gradually decreases,and the distribution becomes more uniform,but there is an opti-mal length.The increase in the height of the connecting beam is beneficial for reducing the displacement of the slope and pile body.The position of the maximum negative bending moment acting on the rear pile occurs at 1.34 to 1.35 times the height of the connecting beam,and the position where the maximum negative bending moment occurs in the front pile gradually moves closer to the bottom of the connecting beam.
关键词
全埋刚架桩/边坡/参数分析/数值模拟/有限元
Key words
fully buried rigid frame piles/slope/parameter analysis/numerical simulation/finite element
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