深厚高填方边坡抗滑桩支护体系变形及稳定性影响分析

Analysis of deformation and stability impact of anti-skid pile support system on deep and high fill slopes

为研究深厚高填方边坡抗滑桩支护体系变形及稳定性影响,基于福州某高压电塔边坡工程,采用极限平衡法、有限元分析方法等对边坡的整体稳定性、抗滑桩的内力及变形进行研究,并对不同降雨入渗深度及坡顶荷载条件影响下边坡的稳定性变化、抗滑桩内力及变形的变化规律进行分析。结果表明:随着降雨入渗深度的增加,抗滑桩水平变形、轴力、弯矩及剪力均随之增大,而边坡的整体稳定性随之减小,降雨条件对边坡稳定性以及抗滑桩的影响不可忽略,在设计中应当着重考虑;随着坡顶荷载的增加,抗滑桩水平变形、轴力、弯矩、剪力及边坡整体稳定性变化不大,但应考虑超载对坡顶局部稳定产生的不利影响。

To study the deformation and stability effects of anti slip pile support system on deep and high fill slopes,based on a high-voltage power tower slope project in Fuzhou,the overall stability of the slope,the internal force and deformation of the anti slip pile were studied using limit equilibrium method,finite element analysis method,etc.The stability changes of the slope,the internal force and deformation of the anti slip pile under different rainfall infiltration depths and slope top load conditions were analyzed.The results show that as the depth of rainfall infiltration increases,the horizontal deformation,axial force,bending moment,and shear force of the anti slip pile all increase,while the overall stability of the slope decreases.The influence of rainfall conditions on slope stability and anti slip piles cannot be ignored,and should be carefully considered in design.As the load on the top of the slope increases,the horizontal deformation,axial force,bending moment,shear force,and overall stability of the anti-skid pile do not change much,but the adverse effects of overloading on the local stability of the slope top should be considered.