铁道标准设计2024，Vol.68Issue(6)：31-36,6.DOI:10.13238/j.issn.1004-2954.202210240001
岩土成层条件下抗滑桩计算的改进有限差分法
Investigation of Anti-sliding Piles Embedded in Multi-layered Soils and Rocks Using Improved Finite Difference Method
摘要
Abstract
Anti-sliding piles in landslide control engineering are probably embedded in multi-layered soils,multi-layered rocks,or multi-layered soils and rocks.The current guidelines suggest adopting the equivalent foundation coefficient for multi-layered soils according to weighted average method,however,the applicability of guideline method needs to be further studied due to the significant difference between multi-layered soils and rocks.To address this problem,a model considering both loading segment and anchoring segment for laterally loaded pile is established based on the Euler-Bernoulli beam method,and a set of matrix formulations using improved finite difference method are presented for evaluating the internal force of whole pile.Compared with a conventional finite difference method,it avoids dividing the anti-sliding pile into the above two segments and complex iterative solutions with the continuity condition at sliding surface.Based on two practical designs of landslide control engineering using anti-sliding piles,the proposed improved finite difference method was proven to be reasonable for evaluating the anti-sliding piles embedded in multi-layered soils and rocks,and the computation takes only approximately 1.2 seconds.In addition,the proposed method can improve computational efficiency compared with the existing methods.关键词
边坡工程/抗滑桩/岩土成层/改进有限差分法/全桩内力分析Key words
slope engineering/anti-sliding pile/multi-layered soils and rocks/improved finitedifference method/internal force of whole pile分类
交通工程引用本文复制引用
张海洋,宋绪国,郭帅杰,闫穆涵..岩土成层条件下抗滑桩计算的改进有限差分法[J].铁道标准设计,2024,68(6):31-36,6.基金项目
中国铁路设计集团有限公司科技开发课题(2021A241013,2020YY241005) （2021A241013,2020YY241005）
