高填路堤的地震荷载动力响应研究  

Research on Seismic Load Dynamic Response of High-filled Embankment

作　　者：韩忠玉 陈颖辉[1] 后钱锋 欧明喜[1] HAN Zhong-yu;CHEN Ying-hui;HOU Qian-feng;OU Ming-xi(Schol of Architctural Engineering,Kunming University of Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明市650500

出　　处：《公路》2022年第8期7-13,共7页Highway

基　　金：国家自然科学基金项目,项目编号51968036;云南省应用基础研究计划项目,项目编号2017FB088。

摘　　要：为了研究地震荷载作用下高填路堤的动力响应特征及变化规律,以云南永大段高速公路某高填路堤边坡为研究对象,利用有限元软件Geo-Studio分析该路堤在不同地震烈度下的水平位移、超孔隙水压力和稳定性的动力响应特征。研究结果表明:路堤在受震时所产生的水平位移随路堤高程的增加而增大,且最大位移处于路堤顶部,最大位移与地震烈度的增强呈指数递增关系;超孔隙水压力首先出现在坡脚附近,并随着地震烈度的增强逐步沿坡脚上移,且超孔隙水压力不断增大,其数值分布由外向内递减;路堤稳定性受地震烈度增强而降幅明显,地震烈度分别为6、7、8、9度时,路堤最小稳定性相较于初始稳定性分别降低了20.7%、40.5%、50.4%、57.3%,并与地震峰值加速度的增加呈指数递减型关系。In order to study the dynamic response characteristics and variation law of high-filled embankment under seismic load, taking a high-filled embankment slope of Yongsheng-Dali Expressway in Yunnan as the study object, the finite element software Geo-Studio is used to analyze the dynamic response characteristics of horizontal displacement, excess pore water pressure and stability of the embankment under different seismic intensities. The results show that the horizontal displacement generated by the embankment under earthquake increases with the increase of embankment height, and the maximum displacement is at the top of the embankment. The maximum displacement and the enhancement of seismic intensity are exponentially increasing. The excess pore water pressure first appears near the slope toe, and gradually moves up along the slope toe with the increase of seismic intensity. The excess pore water pressure increases continuously, and its numerical distribution decreases from outside to inside. The stability of embankment decreases significantly with the increase of seismic intensity. When the seismic intensity is 6, 7, 8 and 9 degrees, the minimum stability of embankment decreases respectively by 20.7%, 40.5%, 50.4% and 57.3% compared with the initial stability, and shows an exponential decreasing relationship with the increase of seismic peak acceleration.

关 键 词：地震荷载 高填路堤 水平位移 超孔隙水压力 稳定性 

分 类 号：U416.12[交通运输工程—道路与铁道工程]