岩土成层条件下抗滑桩计算的改进有限差分法OA北大核心

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.