压力型锚杆支护边坡的动力响应与数值分析  

Dynamic response and numerical analysis on slope supported by pressure-type anchors

作　　者：张妙芝 汪班桥[2] 李楠[2] ZHANG Miaozhi;WANG Banqiao;LI Nan(Shaanxi Railway Institute,Weinan,Shaanxi 714000,China;Chang’an University,Xi’an,Shaanxi 710054,China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]长安大学,陕西西安710054

出　　处：《中国地质灾害与防治学报》2018年第5期135-141,共7页The Chinese Journal of Geological Hazard and Control

基　　金：陕西铁路工程职业技术学院科研基金项目(Ky2017-051);国家自然科学基金(41440021)

摘　　要：采用振动台模型试验,输入汶川波、EL-Centro波和正弦波三种地震波,监测边坡加速度和锚杆应变,探讨地震作用下加固边坡的动力响应特征及锚杆应变的响应规律。得出:加固边坡土体对输入的地震波有垂直放大作用,水平方向放大作用不明显;在地震频率和幅值共同影响下,边坡加速度响应具有明显的差异。同一锚杆沿长度方向应变分布呈"前小后大"的模式;同列不同层锚杆在垂直方向应变响应差别较大,顶层、底层锚杆应变较边坡中部的锚杆应变响应明显。利用ABAQUS数值软件模拟振动台试验过程,得出锚固边坡动力响应特征与振动台试验结果一致。By inputting Wenchuan wave,EL-Centro wave and sinusoidal wave in shaking table model test,the acceleration and anchor strain are monitored to study the dynamic response characteristics of reinforced slope and the response regularity of anchor strain under earthquake.The results show that the reinforced slope has vertical amplification effect to input seismic waves,while the horizontal amplification effect is not obvious.The acceleration responses of slope have obvious difference under the effect of seismic frequency and amplitude.The model of strain distribution is smaller in the front unit and bigger in the back unit along the length in the same anchor.The strain response has difference when the anchors are located in different height,especially the response of anchors which are at the top and bottom is more obvious.The dynamic response characteristics of Anchorage slope are obtained by using ABAQUS software to simulate the shaking table test process,and the results are consistent with those of the shaking table test.

关 键 词：边坡工程 压力型锚杆 振动台模型试验 动力响应 数值分析 

分 类 号：P642[天文地球—工程地质学]