交通荷载和锚杆相对位置对锚固边坡动力承载特性影响研究  

Study on the influence of traffic load and relative position of anchor on dynamic bearing characteristics of anchored slope

作　　者：张根宝 付贵海[1] 谢晨风 张昱 黄道吉 ZHANG Genbao;FU Guihai;XIE Chenfeng;ZHANG Yu;HUANG Daoji(College of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China;Hunan Engineering Research Center for Structural Safety and Disaster Prevention of Urban Underground Infrastructure,Yiyang,Hunan 413000,China;Urban and Rural Construction and Investment Group Limited,Putian,Fujian 351100,China;General Contracting Company of CCFED,Changsha,Hunan 410000,China)

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]城市地下基础设施结构安全与防灾湖南省工程研究中心,湖南益阳413000 [3]莆田市城厢区城乡建设投资集团有限公司,福建莆田351100 [4]中国建筑第五工程局有限公司总承包公司,长沙410000

出　　处：《湖南城市学院学报（自然科学版）》2022年第6期1-8,共8页Journal of Hunan City University:Natural Science

基　　金：国家自然科学基金项目(51908201);湖南省自然科学基金项目(2020JJ5024,2021JJ50142)。

摘　　要：山区交通线路建设中的锚固边坡在服役期间会不可避免地受到轮轨振动等交通荷载作用影响,基于此,本文采用有限差分数值方法研究了荷载作用位置和锚杆设置位置等工况变化对锚固边坡动力承载特性的影响规律.研究发现:锚固边坡锚头锁固力始终经历伴随振荡、发散振荡和稳定振荡3个阶段;交通荷载作用下锚固边坡从被动承载状态转换为主动承载状态;交通荷载传播至坡脚和坡顶的残余振动可引起锁固力稳定振荡幅度达到初始锁固力的20%以上;交通荷载作用位置变化对界面剪应力演化的影响并不显著;坡面中心锚杆可有效约束坡脚和坡顶的残余外滑和残余沉降.During the service period, the anchored slope in the construction of traffic lines in mountainous areas will inevitably be affected by traffic loads such as wheel-rail vibration. In this paper, the finite difference numerical method is used to study the influence law of load acting position and anchor position on the dynamic bearing characteristics of anchored slope. It is found that the anchor head locking force of anchoring slope always goes through three stages: accompanying oscillation, divergent oscillation and stable oscillation;the bearing condition of the anchored slope switches from passive state to active state under traffic load;the residual vibration of the traffic spreading to the foot and top of the slope can cause the oscillation amplitude of the locking force to reach more than 20% of the initial locking force;the influence of the location of traffic load on the evolution of interface shear stress is not significant;the central slope anchor can effectively restrain the residual slip and residual settlement at the foot and top of the slope.

关 键 词：交通荷载 锚固边坡 锁固力 发散振荡 坡体变形 

分 类 号：X948[环境科学与工程—安全科学]