摘要
以九寨黄龙机场为例,采用数值模拟手段,对高填方边坡,尤其是对含软弱土夹层的高填方边坡在天然状态、降雨状态、地震状态下的稳定性进行分析,从加速度响应、速度响应、位移响应等3个方面,评估高填方边坡的安全稳定性。结果表明,黄龙机场在天然状态下不稳定面的安全储备较低;在降雨条件下,雨水对坡体地下水的影响程度较小,但由于入渗沿着粉土上部与填筑体下部位置向坡体内部延伸,软化坡脚,降雨量为150 mm时,整体边坡处于欠稳定状态;在降雨及地震条件下,坡体处于不稳定状态。
Taking Jiuzhai Huanglong Airport as an example,the numerical simulation method is used to analyze the stability of high fill slope,especially the high fill slope with soft soil interlayer,under the conditions of natural,rainfall and earthquake,and the dynamic response of slope is evaluated from three aspects of acceleration response,velocity response and displacement response.The evaluation results indicate that,(a)the safety reserve of unstable surfaces in Huanglong Airport is low under natural condition;(b)under rainfall condition,the impact of rainwater on slope groundwater is small,but due to the infiltration along the upper part of powder soil and the lower part of filling body extending toward the inside of slope body,the slope foot will be soften,and when the rainfall reaches 150 mm,the overall slope is in an unstable state;and(c)under the joint action of rainfall and earthquake,the slope is unstable.
作者
韩文喜
张日华
王昊
HAN Wenxi;ZHANG Rihua;WANG Hao(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,Sichuan,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,Sichuan,China)
出处
《水力发电》
北大核心
2019年第12期31-36,共6页
Water Power
基金
国家重点基础研究发展计划(“973”计划)课题资助项目(2014CB047003)
关键词
高填方边坡
稳定性
软弱土层
降雨
地震
数值模拟
high fill slope
stability
soft soil layer
rainfall
earthquake
numerical simulation
