基于弹性波波速的降雨型滑坡早期预警阈值研究  

Early warning threshold study against rainfall-induced landslide based on elastic wave velocity

作　　者：陈宇龙 邓凯仁 董昱纬 CHEN Yulong;DENG Kairen;DONG Yuwei(School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Chinese Institute of Coal Science,Ltd.Co.,Beijing 100013,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083 [2]煤炭科学研究总院有限公司,北京100013

出　　处：《大连理工大学学报》2024年第6期624-632,共9页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(52009131).

摘　　要：降雨是诱发滑坡的最主要因素,降雨型滑坡早期预警系统成为减少滑坡造成的人员伤亡和财产损失的最好选择之一.弹性波波速监测可用于滑坡早期预警,为确定降雨型滑坡早期预警系统的弹性波波速阈值,开展了一系列降雨离心模型试验.首先确定了滑坡启动前的临界变形,再统计了临界变形对应的降雨型滑坡弹性波波速阈值,最后通过大型边坡模型试验和现场试验验证了定义的弹性波波速阈值的正确性.基于模型试验结果,建议归一化的弹性波波速0.9作为降雨型滑坡早期预警阈值,坡脚处为最佳监测位置.Rainfall is the prime factor that induces landslides.An early warning system for rainfall-induced landslides becomes one of the best choices to reduce human casualties and economic losses caused by landslides.Elastic wave velocity monitoring can be utilized for landslide early warning.A series of rainfall centrifugal model experiments are conducted to define an elastic wave velocity threshold for a rainfall-induced landslide early warning system.The critical deformation before landslide initiation is firstly determined.Then the elastic wave velocity corresponding to the critical deformation is compiled to establish the elastic wave velocity threshold for rainfall-induced landslides.Finally,through a large-scale slope model test and a field test,the defined elastic wave velocity threshold is confirmed.Based on the model test results,the normalized elastic wave velocity of 0.9 is recommended as the threshold for rainfall-induced landslide early warning,and the slope toe is the optimal location for monitoring.

关 键 词：滑坡 降雨 早期预警 弹性波波速 阈值 

分 类 号：P642[天文地球—工程地质学]