摘要
基于地基干涉雷达开展含水土质边坡变形监测是降低滑坡地质灾害发生、防止二次埋压险情发生、保障应急救援现场人员生命安全的有效手段.应用自研的便携式边坡雷达系统,在论述系统信号模型和相关技术的基础上,将雷达监测精度指标分解为精密度和准确度,提出精度测定流程并通过实验验证了系统高频变形监测能力及亚毫米级监测精度,进而开展含水土质边坡滑坡模拟试验,通过不同历时节点下坡体表面变形与降水量综合分析说明了本次含水土质边坡表面变形监测曲线与岩土体非稳定蠕变曲线具有较高的相似性,在云南省洱源县滑坡隐患点进行监测应用,结合不同地层深度含水率数据分析边坡变形态势.研究结果可为含水土质边坡安全监测预警系统的研发优化提供有力支撑.
The ground interference radar is an effective means for deformation monitoring of water-bearing soil slope to reduce the occurrence of landslide geological disasters,prevent the occurrence of secondary buried pres-sure,and ensure the life safety of emergency rescue site personnel.In this paper,a radar monitoring accuracy in-dicator was decomposed into precision and accuracy,and a precision measurement process was proposed based on the analysis of radar monitoring system signal model,related technologies and a self developed portable slope radar system.Some experiments were carried out to verify the system's high-frequency deformation monitoring ability and sub millimeter level monitoring accuracy,and a simulation test of water-bearing soil slope landslide was conducted.The comprehensive analysis of slope surface deformation and precipitation at different time nodes shows that the monitoring curve of surface deformation of water-bearing soil slopes possesses a high similarity to the unstable creep curve of rock and soil mass.Finally,the monitoring application was conducted at the landslide hidden danger point in Eryuan County,Yunnan Province,and the slope deformation trend was ana-lyzed based on the water content data of different strata depths.The research results can provide a strong support for the development and optimization of the safety monitoring and early warning system for water-bearing soil slopes.
作者
张浩
杨晓琳
马海涛
于正兴
王雨
ZHANG Hao;YANG Xiaolin;MA Haitao;YU Zhengxing;WANG Yu(China Academy of Safety Science and Technology,Beijing 100012,China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2023年第11期1154-1163,共10页
Transactions of Beijing Institute of Technology
基金
国家重点研发计划项目(2021YFC3090403)
中国安全生产科学研究院基本科研业务费专项资金项目(2023JBKY04)。
关键词
土质边坡
变形监测
地基干涉雷达
精度验证
soil slope
deformation monitoring
ground based interferometric radar
accuracy verification
