天然源面波法在城市道路应急检测中的应用  

Application of Natural Source Surface Wave in Urban Road Emergency Detection

作　　者：沈阳 张慧利 巩一帆 董耀 白金生 Shen Yang;Zhang Huili;Gong Yifan;Dong Yao;Bai Jinsheng(Mineral Resources Exploration Center of Henan Geological Bureau,Zhengzhou Henan 450053,China;Natural Resources Science and Technology Innovation Center of Henan Province(Geophysical Deep Exploration Research),Zhengzhou Henan 450053,China)

机构地区：[1]河南省地质局矿产资源勘查中心,河南郑州450053 [2]河南省自然资源科技创新中心(地球物理深部探测研究),河南郑州450053

出　　处：《工程地球物理学报》2024年第6期1006-1013,共8页Chinese Journal of Engineering Geophysics

基　　金：豫地矿青科创项目(编号:202108)。

摘　　要：近年来,随着城市化进程的加速和交通基础设施的日益密集,受建设施工、地质环境变化、地下管线老化及自然灾害等因素影响,城市道路沉降、塌陷事故时有发生,急需一种快速无损的物探方法,为应急处置提供依据。本文选取天然源面波法,采用直线型大道数排列,利用天然源面波中的高频信号,对数据采集时长、数据处理使用道数进行了对比试验;随后进行数据处理,获得了横波速度剖面,快速圈出了4处低速异常区和2处高速异常区,综合地表调查、地质和钻孔资料分析研究,推断低速异常区(横波速度值150~250 m/s)均是地层充水形成的松散体,推断两高速异常区(横波速度值450~500 m/s),其中一处是大桥桩基形成的高速体,另一处是治理后充填的混凝土形成的高速体。本次研究成果表明,天然源面波法在城市道路应急检测中是有效的方法。In recent years,with the acceleration of urbanization and the increasing density of transportation infrastructure,urban road subsidence and collapse incidents occurre frequently due to various factors such as construction activities,geological environment changes,aging of underground pipelines,and natural disasters.There is an urgent need for a rapid and non-destructive geophysical method to provide a basis for emergency response.This paper proposes the natural source surface wave method,utilizing a linear large-channel array to capture high-frequency signals within the natural source surface waves.Comparative experiments are conducted on data acquisition duration and the number of channels used in data processing.Following data processing,shear wave velocity profiles are obtained,swiftly identifying four low-velocity anomaly zones and two high-velocity anomaly zones.Through comprehensive analysis of surface surveys,geological data,and borehole information,the paper infers that the low-velocity anomaly zones(with shear wave velocities ranging from 150 to 250 m/s)represent loose formations caused by water-saturated strata.The two high-velocity anomaly zones(both with shear wave velocities between 450 and 500 m/s)are composed of one high-velocity body formed by bridge pile foundations and another formed by post-treatment concrete filling.The results demonstrate the effectiveness of the natural source surface wave method in emergency inspections of urban roads.

关 键 词：天然源面波法 城市道路 应急检测 

分 类 号：P631.4[天文地球—地质矿产勘探]