【摘要】 大截面的双排抗滑桩具有复杂的受力特性。建立有限元模型,分析不同排距下双排桩对推力的分担,分析结果显示:双排桩上的推力总和要大于只设前排桩时的推力;当排距较小时,滑坡推力几乎全由后排桩承担,由于后排桩的遮蔽作用,前排桩达不到最佳抗滑效果,随着排距增加,前排桩分担的推力逐渐增加,当达到一定排距后,双排桩完全独立工作,各自承担一部分滑体,前后双排桩均达到最佳抗滑效果;并在推力分担、支挡后稳定系数的计算基础上,提出以双排桩的推力和、稳定系数和双排桩承担的推力差为目标,建立用于双排抗滑桩的多目标优化,优选出具有多种属性的双排抗滑桩的排距和推力分担。更多还原

【Abstract】 The structure of two-row anti-slide piles is a complex mechanical characteristics.A finite element model is established and the share ratios with the thrust of the front and back rows of piles at different row distances are discussed.It indicates that the total thrust of the two-row piles is bigger than the thrust of only the front row piles.While the row distance is small,the back row pile shared almost all the thrust,and with the masking function of the back row piles,the front row pile couldn’t display the best effectiveness.When the pile row distance increased,the share ratio of piles in front row increased gradually.The two piles worked independently,resisted part sliding block respectively and displayed the best effectiveness at the particular row distance.Based on calculation of trust and stability factor for the structure of two-row anti-slide piles,the projects of the total trust,the stability factor and the difference of two piles are selected and the multi-project optimization for two-row anti-slide piles is put forward.The most reasonable row distance and share ratio of the thrust are attained.更多还原