土堤隐患地质雷达探测图谱特征分析  

Analysis on Geological Radar Detection Spectrum Characteristics of Hidden Danger in Earth Embankment

作　　者：陈金陵 杨博凯 殷明 华兴林 马力 CHEN Jinling;YANG Bokai;YIN Ming;HUA Xinglin;MA Li(Water Affairs Bureau of Liuhe District in Nanjing City,Nanjing 210000,Jiangsu,China;Yangtze River Channel Management Office in Nanjing City,Nanjing 210000,Jiangsu,China;Nanjing Water Conservancy Planning and Design Institute Co.,Ltd.,Nanjing 210000,Jiangsu,China)

机构地区：[1]南京市六合区水务局,江苏南京210000 [2]南京市长江河道管理处,江苏南京210000 [3]南京市水利规划设计院股份有限公司,江苏南京210000

出　　处：《黄河水利职业技术学院学报》2025年第2期15-22,共8页Journal of Yellow River Conservancy Technical Institute

基　　金：南京市科研项目:基性岩成因河岸土体滑坡防治对策研究(202204)。

摘　　要：针对某河岸土堤隐患探测需求,结合该河岸土堤的构成特征,基于时域差分理论,采用GPRSIM软件对不同隐患的地质雷达图谱进行正演模拟,并将模拟结果与现场探测得到的图谱进行对比分析,发现:堤身良好段各结构层介质分布均匀,地质雷达反射波图谱上显示为同相轴连续,堤身反射界面连续、稳定,无大的起伏;堤身发生沉降较小时,地质雷达反射波图谱上显示同相轴连续,但呈下凹形特征;堤身发生较大沉降或土体松散时,地质雷达反射波图谱上显示同相轴不连续,异常区域振幅较弱,雷达波形频率偏低,土体松散易引起较大的沉降和混凝土面层下部脱空现象。正演模拟结果与地质雷达现场实测和验证结果基本一致。In response to the demand for detecting hidden danger in earth embankment of a certain riverbank,combined with the composition characteristics of the riverbank earth embankment and based on the time-domain difference theory,the GPRSIM software was employed to conduct forward modeling of the geological radar spectrum for different hidden dangers.The simulation results were compared and analyzed with the spectrum obtained from on-site detection.It was discovered that:in the sections with good embankment conditions,the medium distribution of each structural layer was uniform,and the geological radar reflection wave spectrum showed continuous phase axes,with continuous and stable reflection interfaces of the embankment and no significant fluctuations;when the settlement of the embankment was relatively small,the geological radar reflection wave spectrum showed continuous phase axes but with a concave-shaped characteristic;when the settlement of the embankment was significant or the soil was loose,the geological radar reflection wave spectrum showed discontinuous phase axes,with weak amplitudes in the abnormal areas,a low frequency of the radar waveform,and loose soil was prone to cause significant settlement and voids beneath the concrete surface layer.The forward modeling results were largely consistent with the on-site measured and verified results of the geological radar.

关 键 词：土堤隐患 地质雷达探测技术 时域差分理论 图谱特征 正演模拟 现场探测 

分 类 号：P631.325[天文地球—地质矿产勘探]