摘要
研究汽车振动作用下斜坡岩土体动力响应及稳定性。以西南山区公路沿线常见的顺层边坡为研究对象,通过案例收集与特征统计,构建汽车振动作用下含软弱层顺向桥基岸坡地质概念模型;利用现场实测、时域和频域分析,对比数值模拟与实测结果,建立并确定了汽车振动的最优等效荷载模型;进而分析了汽车振动作用下岩土体加速度、应力和位移的动力响应特征,及其对边坡稳定状况的影响。结果表明:汽车振动引起边坡岩土体动力参数随距离衰减,且受软弱层显著影响,其中加速度和动位移表现为加速衰减,但动应力却出现局部升高现象。汽车振动作用下边坡稳定性系数会降低0.25(15%)。
In this paper,the dynamic response and stability of rock and soil mass on the slope under the action of automobile vibration are studied by taking the common bedding slope along the highway in southwest mountainous area as the research object.Through case collection and feature statistics,a conceptual geological model of dip-bedding slope of bridge foundation with weak layer under vehicle vibration is constructed.Based on the field measurement,time domain and frequency domain analysis,the optimal equivalent load model of vehicle vibration is established and determined by comparing the numerical simulation results with the measured results.Then the dynamic response characteristics of rock mass acceleration,stress and displacement under automobile vibration are analyzed,and their effects on slope stability are also discussed.The results show that the dynamic parameters of rock and soil mass of slope are attenuated with distance due to automobile vibration,and are significantly affected by the weak layer.The acceleration and dynamic displacement are attenuated with acceleration,while the dynamic stress increases locally.Under the action of automobile vibration,the slope stability coefficient will be reduced by 0.25(15%),indicating that enough attention should be paid to the impact of vehicle vibration on the dip-bedding slope with weak-interlayer during the long-term service in mountainous expressways.
作者
张敏
剪鑫磊
毛东升
曾探
黄健
ZHANG Min;JIAN Xinlei;MAO Dongsheng;ZENG Tan;HUNAG Jian(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;China National Petroleum Pipeline Engineering Co.,Ltd.,Langfang 065000,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第5期577-587,共11页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2020Z007)。
关键词
桥基岸坡
汽车振动
动力响应
稳定性
slope of bridge foundation
vehicle vibration
dynamic response
stability
作者简介
第一作者:张敏(1979-),男,高级工程师,研究方向:铁路勘查设计,E-mail:mmjj102@126.com;通信作者:黄健(1984-),男,博士,副教授,研究方向:地质灾害风险量化评价与监测预警,E-mail:huangjian2013@cdut.edu.cn。
