文档介绍：
地震作用下机场黄土高边坡稳定性研究#
谷天峰,王家鼎*
(西北大学地质学系/大陆动力学国家重点实验室,西安 710069)
5
10
摘要:吕梁机场是我国在黄土地区修建的山区机场,其最大填方高度超过 80m,顺坡填筑的
边坡高度超过 110m,因此高边坡的稳定性问题对机场建设和运营安全具有重要意义。本文
在工程地质条件分析基础上,结合勘察、试验资料,建立了吕梁机场黄土高边坡的有限元模
型,采用时程分析方法,模拟了地震力作用下边坡的变形特征,利用有限元动力分析法和强
度折减法相结合,分析了边坡在地震荷载下的安全性。结果表明,地震波的临空面上放大效
应明显,坡顶的地震动响应与坡底有明显的相位差;以斜坡上特征点的位移、速度时程作为
判断动力稳定性的主要依据,得到边坡在这种地震荷载下的安全系数为 。
关键词:工程地质;黄土边坡;动力稳定;地震荷载
中图分类号:P
15
Research of Loess High-slope Stability of Airport Under
Seismic Load
Gu Tianfeng, Wang Jiading
(State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University,
20
25
30
35
40
Xi’an 710069,China)
Abstract: Luliang airport is one of Mountain airports which is built in loess area in China, with
maximum height of embankment is more than 80 m and slope height down the hillside is more
than 110 m. The dynamic stability of the high slope is very significant to safe operation of the
airport. In this paper, based on the analysis of engineering geological conditions, investigation and
test data, the finite element model of the loess high slope of luliang airport is established. The
deformation of the slope under seismic force is simulated using time history analysis method and
dynamic analysis is adopted using finite element dynamic analysis method and strength
subtraction method. The results show that the amplification of seismic wave