摘要
抗滑桩广泛应用于边坡加固工程中,抗滑桩桩间距的合理选择不仅能够保证边坡的稳定性,还能够缩短施工流程并提高经济效益.采用有限元软件ABAQUS对模型进行验证,通过编写和调用子程序,引入土体各向异性表征参量,并利用强度折减法求解不同桩间距下的安全系数,基于有限元软件的计算结果绘制出不同路径上的应力曲线.研究结果表明:考虑各向异性条件时的安全系数小于各向同性条件下的安全系数;当桩间距从一个较小的范围内逐渐增加时,土拱的影响范围先增大后减小,安全系数逐渐降低.最终,通过对安全系数与桩间距曲线的拟合表明,最优桩间距为5倍的桩径.
Anti-slide piles are widely used in slope reinforcement engineering.Choosing a reasonable spacing of anti-slide piles can not only ensure the stability of the structure,but also shorten the construction process and improve economic benefits.The finite element software ABAQUS was used to verify the model,and the subroutine was written and called to introduce the characteristic parameters of soil anisotropy.Through the strength reduction method,the variation of safety factor with different pile spacing was calculate.Based on the simulation,the stress curves on different paths were drawn.The results show that the safety factor under the anisotropic condition is less than that under the isotropic condition.When the pile spacing increases within a small range,the influence range of the soil arch increases at first and decreases later.The safety factor reduces gradually.Finally,by fitting the curve of safety factor and pile spacing,it shows that the optimal pile spacing is 5 times of pile diameter.
作者
宁帅
庄妍
谈云志
王东星
NING Shuai;ZHUANG Yan;TAN Yunzhi;WANG Dongxing(Joint Graduate School(Suzhou),Southeast Univ.,Nanjing 211189,China;School of Civil Engineering,Southeast Univ.,Nanjing 211189,China;Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education,China Three Gorges Univ.,Yichang 443002,China;School of Civil Engineering,Wuhan Univ.,Wuhan 430072,China)
出处
《三峡大学学报（自然科学版）》
CAS
2021年第1期43-47,共5页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金优秀青年科学基金项目(51922029)。
关键词
边坡加固
抗滑桩
桩间距
数值模拟
水平土拱效应
安全系数
各向异性
slope reinforcement
anti-slide pile
pile spacing
numerical simulation
horizontal soil arching effect
safety factor
anisotropy
