地震中土体强度对抗滑桩变形和嵌固深度的影响

Influence of soil strength on deformation and embedded depth of anti-slide pile in earthquake

不同碎石土滑坡存在不同的强度差异。通过物理模型实验和数值模拟实验,分析了在地震荷载作用下不同土体强度抗滑桩支护滑坡的响应过程,得出:增大土体的强度,有利于发挥抗滑桩的抗滑作用,抗滑桩抗震效果较好,但是也存在一定程度的浪费;而减小土体强度,抗震效果并不好。利用ANSYS动力有限元程序,结合强度折减动力分析法,总结并建立了嵌固深度与土体强度设计值凝聚力、内摩擦角的相互作用计算模型和经验判别式。其设计方法和研究思路可为以后的相关研究提供借鉴和参考。

Aiming at different strength of debris landslides,we analyzed the response process of anti- slide pile reinforcing landslides with different soil strength under earthquake load through physical model test and numerical simulation. The results showed that anti- slide pile can better fulfill its performance with the increase of soil strength but with a certain amount of waste;otherwise,the anti- sliding property would be declined. By utilizing the dynamic finite element process ANSYS,combined with dynamic analysis method of strengthreduction,we conclud and establish the calculation model and experience discrimination that consider the mutual effect of anchored depth and soil design strength cohesion force and internal friction angle. The design method and research mentality couldgive some references to related researches.