工程地质学报2024，Vol.32Issue(1)：315-324,10.DOI:10.13544/j.cnki.jeg.2021-0747
L型抗滑桩加固土坡特性的离心模型试验与有限元模拟研究
CENTRIFUGE MODEL TEST AND FINITE ELEMENT ANALYSIS ON L-PILE REINFORCED SLOPE
摘要
Abstract
In this paper,a combination of centrifugal model tests and numerical simulations is used to study the deformation characteristics of L-pile-reinforced slopes and the interaction between piles and soil.Based on the cen-trifugal model test,the displacement field of the L-pile-reinforced slope under 50g gravity acceleration is obtained,and the centrifugal model test process is simulated using a finite element method.The numerical values agree well with the load-displacement curve of the slope obtained from the test results.Compared with the results of numerical simulation,it is found that the reinforcement effect of L-piles is obviously better than that of conventional piles.The displacement of the slope is reduced by about 25％,and the rotation angle is reduced by about 70％.The soil pres-sure distribution on the upper and lower sides of the surface horizontal section of the L-pile was quite different due to the horizontal section and vertical section,with the maximum difference of about 150 kPa.There is a minimum value of friction,about 10 kPa,between the horizontal section and the L-pile-reinforced slope.There is a peak val-ue of displacement distribution inside the vertical section.Through the analysis of stress and deformation of the slope through various methods,it is verified that soil arching effect occurred on the slope under the action of the pile.The horizontal section of the L-pile further intensifies the soil arching effect and improves the stability of the L-pile.关键词
L型抗滑桩/边坡/桩土相互作用/土拱效应/离心模型试验/数值模拟Key words
L-pile/Slope/Pile-soil interaction/Soil arch effect/Centrifugal model test/Numerical simulation分类
地质学引用本文复制引用
彭秀华,刘素嘉,张涵轲,张嘎..L型抗滑桩加固土坡特性的离心模型试验与有限元模拟研究[J].工程地质学报,2024,32(1):315-324,10.基金项目
国家重点研发计划项目(资助号:2018YFC1508503).This research is supported by the National Key R&D Program of China(Grant No.2018YFC1508503). （资助号:2018YFC1508503）
