基于通用条分原理的锚框支护边坡地震动力稳定分析  

SEISMIC STABILITY ANALYSIS FOR ANCHOR-FRAME REINFORCED SLOPE USING GENERAL SLICE PRINCIPLE

作　　者：邓涛[1] 卢钦武 吴尚杰[1] 关振长[1] DENG Tao;LU Qinwu;WU Shangjie;GUAN Zhenchang(College of Civil Engineering,Fuzhou University,Fuzhou 350108)

机构地区：[1]福州大学土木工程学院

出　　处：《工程地质学报》2019年第3期601-607,共7页Journal of Engineering Geology

基　　金：福建省交通运输科技发展项目(201531)资助~~

摘　　要：考虑水平地震力作用与锚框支护作用,分析微分形式的土条受力平衡,推导积分形式的滑体极限平衡,编程搜索求解相应方程组,提出一套基于通用条分原理的锚框支护边坡地震动力稳定分析方法。利用本文所述方法与数值模拟方法,分别计算了某高速公路锚框支护边坡的动力稳定安全系数,两者结果基本相同。进一步探讨了平均锚固力和地震作用系数对该边坡动力稳定安全系数的影响。本文所述基于通用条分原理的锚框支护边坡地震动力稳定分析方法,具有考虑因素全面、计算工作量小的优点,能够为边坡工程的初步设计,包括坡形设计、锚杆优化、抗震验算等,提供一种较为准确的简便计算手段。Considering the horizontal seismic action and the anchor-frame reinforcement,we propose a seismic stability analysis method on the basis of general slice principle for the anchor-frame reinforced slope.The equilibrium of single slice in differential form is analyzed firstly.Then the limit equilibrium equations of sliding body in integral form are deduced.Finally the equations are solved with programming of ergodic searching.Taking the anchor-frame reinforced slope on an expressway as a prototype,both of the proposed analysis method and the numerical simulation method are used to calculate the safety factor of slope under the designed seismic action.The results calculated by these two methods fit each other well,which implies the validity of the proposed method.We also discuss the influences of average anchoring force and seismic action coefficient on the safety factor of seismic stability.The proposed analysis method associated with the general slice principle can provide an efficient means not only for the seismic stability analysis,but also for the preliminary design of anchor-frame reinforced slope.

关 键 词：锚框支护边坡 地震动力稳定 通用条分法 数值模拟 安全系数 

分 类 号：U41[交通运输工程—道路与铁道工程]