道路碎石垫层异常缺陷的探地雷达响应特征
|
摘要
采用探地雷达技术探测碎石垫层异常,研究碎石垫层脱落、碎石垫层层间具有密实-疏松界面、碎石垫层厚度变化及碎石垫层由松散块石充填4种异常的探地雷达响应特征。时域剖面评价、钻探资料验证、典型单道波形时域及频谱对比分析表明:碎石垫层脱落表现为同相轴的缺失,碎石垫层层间弱反射的反相性,谱能量分布在整个频率范围,且在550~800MHz出现较强信号;碎石垫层间存在密实-疏松界面表现为碎石垫层层间存在同相轴,谱能量集中在中低频区,能量峰较多;碎石垫层厚度变化表现为上下界面反射波时间差的大小(同相轴的上凸或下拉);碎石垫层由松散块石充填表现为强振幅复合波(同相轴杂乱,具有小绕射弧),谱能量峰叠加严重,峰值较大。
Ground-penetrating radar( GPR) technology was used to detect the abnormality of a gravel cushion,and the characteristics of GPR response to four abnormal defects,including gravel cushion shedding,gravel cushions with dense and loose interfaces,a gravel cushion with varied thickness,and a gravel cushion filled with loose rock,were studied. Through temporal profile evaluation,drilling data validation,and comparative analysis of a typical single-channel time-domain waveform and its frequency spectrum,the results show the following: the typical singlechannel waveform for gravel cushion shedding is characterized by an absence of the event on the profile,the reverse phase of the weak reflection of the interlayer,spectral energy distributed over the whole frequency range,and strong signals appearing in the 550 to 800 MHz bands; the typical single-channel waveform for the gravel cushions with dense and loose interfaces presents the event on the profile,spectrum energy that concentrates in the low-frequency area,and more energy peaks; the typical single-channel waveform for a gravel cushion with varied thickness shows the time difference in reflected waves between the upper and lower interfaces( upward convex event or pull-down event); the typical single-channel waveform for a gravel cushion filled with loose rock shows strong-amplitude complex waves( a random event with a diffraction fringe),significant energy peak superposition,and a higher peak.
Ground-penetrating radar( GPR) technology was used to detect the abnormality of a gravel cushion,and the characteristics of GPR response to four abnormal defects,including gravel cushion shedding,gravel cushions with dense and loose interfaces,a gravel cushion with varied thickness,and a gravel cushion filled with loose rock,were studied. Through temporal profile evaluation,drilling data validation,and comparative analysis of a typical single-channel time-domain waveform and its frequency spectrum,the results show the following: the typical singlechannel waveform for gravel cushion shedding is characterized by an absence of the event on the profile,the reverse phase of the weak reflection of the interlayer,spectral energy distributed over the whole frequency range,and strong signals appearing in the 550 to 800 MHz bands; the typical single-channel waveform for the gravel cushions with dense and loose interfaces presents the event on the profile,spectrum energy that concentrates in the low-frequency area,and more energy peaks; the typical single-channel waveform for a gravel cushion with varied thickness shows the time difference in reflected waves between the upper and lower interfaces( upward convex event or pull-down event); the typical single-channel waveform for a gravel cushion filled with loose rock shows strong-amplitude complex waves( a random event with a diffraction fringe),significant energy peak superposition,and a higher peak.
引文
[1]刘敦文,徐国元,黄仁东,等.探地雷达在公路建设中的应用研究[J].公路交通科技,2004,21(5):33-35.(LIU Dunwen,XU Guoyuan,HUANG Rendong,et al.Ground penetrating radar survey in highway construction[J].Journal of Highway and Transportation Research and Development,2004,21(5):33-35.(in Chinese))
[2]张娟,台电仓,赵述曾,等.探地雷达在水泥混凝土路面改造中的应用[J].公路交通技术,2007(2):29-32.(ZHANG Juan,TAI Diancang,ZHAO Shuzeng,et al.Application of ground penetrating radar in cement concrete pavement retrofitting[J].Technology of Highway and Transport,2007(2):29-32.(in Chinese))
[3]曹雪山,蔡亮,郑长江.探地雷达在高等级公路质量检测和管理中的应用[J].河海大学学报:自然科学版,2002,30(3):68-71.(CAO Xueshan,CAI Liang,ZHENG Changjiang.Application of ground penetrating radar to quality inspection and management of high-grade roads[J].Journal of Hohai University:Natural Sciences,2002,30(3):68-71.(in Chinese))
[4]周正东,马良筠.堤坝隐患检测试验研究[J].河海大学学报:自然科学版,2002,30(2):90-92.(ZHOU Zhengdong,MA Liangyun.Experimental study on damanomaly detection[J].Journal of Hohai University:Natural Sciences,2002,30(2):90-92.(in Chinese))
[5]郭高轩,吴吉春.应用GPR获取多孔介质水力参数研究进展[J].河海大学学报:自然科学版,2005,33(1):18-23.(GUO Gaoxuan,WU Jichun.Advances in estimation of hydrogeological parameters of porous media with ground penetrating radar[J].Journal of Hohai University:Natural Sciences,2005,33(1):18-23.(in Chinese))
[6]徐鹏,吴中,张业炜.信号变换处理方法在公路观测中的应用[J].河海大学学报:自然科学版,2008,36(1):125-128.(XU Peng,WU Zhong,ZHANG Yewei.Application of signal transform method to highway observation[J].Journal of Hohai University:Natural Sciences,2008,36(1):125-128.(in Chinese))
[7]沈飚,石庆华,孙忠良.道路铺砌层中探地雷达波传播的正演模拟及应用[J].石油地球物理勘探,1997,32(增刊1):135-140.(SHENG Biao,SHI Qinghua,SUN Zhongliang.Wave transmission and application of paving layer in the forward modeling of GPR[J].Oil Geophysical Prospecting,1997,32(Sup1):135-140.(in Chinese))
[8]赵燕峰,娄海.道路探地雷达在高速公路检测技术中的应用[J].河南师范大学学报:自然科学版,2004,32(2):98-100.(ZHAO Yanfeng,LOU Hai.The applications and test technology with exploring land radar on expressway[J].Journal of Henan Normal University:Natural Science,2004,32(2):98-100.(in Chinese))
[9]杨天春,吕绍林,王齐仁.探地雷达检测道路厚度结构的应用现状及进展[J].物探与化探,2003,27(1):79-82.(YANG Tianchun,LYU Shaolin,WANG Qiren.The application and development of GPR in detection of pavement thickness and highway structures[J].Geophysical and Geochemical Exploration,2003,27(1):79-82.(in Chinese))
[10]徐升才,刘峰.探地雷达在城市道路厚度检测中的研究与应用[J].华东交通大学学报,2000,17(4):24-28.(XU Shengcai,LIU Feng.The research and application of GPR to detect thickness in city road[J].Journal of East China Jiaotong University,2000,17(4):24-28.(in Chinese))
[11]赵昕,黄琪,李海滨.路面基层厚度探地雷达检测效果分析[J].路基工程,2009(5):81-82.(ZHAO Xin,HUANG QI,LI Haibin.Analysis on thickness of pavement base GPR detection[J].Subgrade Engineering,2009(5):81-82.(in Chinese))
[12]范跃武,李修忠,白兴盈,等.探地雷达检测公路结构层裂缝实用方法研究[J].公路交通科技,2007,24(6):1-7.(FAN Yuewu,LI Xiuzhong,BAI Xingying,et al.Study on highway structure layer crack detection by ground penetrating radar[J].Journal of Highway and Transportation Research and Development,2007,24(6):1-7.(in Chinese))
[13]谢昭晖,李金铭.探地雷达技术在道路路基病害探测中的应用[J].地质与勘探,2007,43(5):92-95.(XIE Zhaohui,LI Jinming.Application of ground penetrating radar technique in the detection of roadbed disease[J].Geology and Prospecting,2007,43(5):92-95.(in Chinese))
[14]姜洪,王选仓.探地雷达对路面板脱空现象检测时的信号分析与处理[J].公路交通科技,2010,27(1):22-27.(JIANG Hong,WANG Xuancang.Signal analysis and processing for detecting void phenomenon under concrete pavement by using ground penetrating radar[J].Journal of Highway and Transportation Research and Development,2010,27(1):22-27.(in Chinese))
[15]贾辉,陈昌彦,白朝旭,等.城市道路病害检测中常见干扰源探地雷达图像特征分析[J].工程勘察,2012(11):86-92.(JIA Hui,CHEN Changyan,BAI Zhaoxu,et al.Common interference GPR image and its characteristic analysis in city road disease detection[J].Geotechnical Investigation&Surveying,2012(11):86-92.(in Chinese))
[16]曾海,张东长.地质雷达在混凝土路面板脱空检测中的应用探讨[J].公路交通技术,2005(3):72-74.(ZENG Hai,ZHANG Dongchang.Discussion on inspecting the hollow in concrte plane road using GPR[J].Technology of Highway and Transport,2005(3):72-74.(in Chinese))
[2]张娟,台电仓,赵述曾,等.探地雷达在水泥混凝土路面改造中的应用[J].公路交通技术,2007(2):29-32.(ZHANG Juan,TAI Diancang,ZHAO Shuzeng,et al.Application of ground penetrating radar in cement concrete pavement retrofitting[J].Technology of Highway and Transport,2007(2):29-32.(in Chinese))
[3]曹雪山,蔡亮,郑长江.探地雷达在高等级公路质量检测和管理中的应用[J].河海大学学报:自然科学版,2002,30(3):68-71.(CAO Xueshan,CAI Liang,ZHENG Changjiang.Application of ground penetrating radar to quality inspection and management of high-grade roads[J].Journal of Hohai University:Natural Sciences,2002,30(3):68-71.(in Chinese))
[4]周正东,马良筠.堤坝隐患检测试验研究[J].河海大学学报:自然科学版,2002,30(2):90-92.(ZHOU Zhengdong,MA Liangyun.Experimental study on damanomaly detection[J].Journal of Hohai University:Natural Sciences,2002,30(2):90-92.(in Chinese))
[5]郭高轩,吴吉春.应用GPR获取多孔介质水力参数研究进展[J].河海大学学报:自然科学版,2005,33(1):18-23.(GUO Gaoxuan,WU Jichun.Advances in estimation of hydrogeological parameters of porous media with ground penetrating radar[J].Journal of Hohai University:Natural Sciences,2005,33(1):18-23.(in Chinese))
[6]徐鹏,吴中,张业炜.信号变换处理方法在公路观测中的应用[J].河海大学学报:自然科学版,2008,36(1):125-128.(XU Peng,WU Zhong,ZHANG Yewei.Application of signal transform method to highway observation[J].Journal of Hohai University:Natural Sciences,2008,36(1):125-128.(in Chinese))
[7]沈飚,石庆华,孙忠良.道路铺砌层中探地雷达波传播的正演模拟及应用[J].石油地球物理勘探,1997,32(增刊1):135-140.(SHENG Biao,SHI Qinghua,SUN Zhongliang.Wave transmission and application of paving layer in the forward modeling of GPR[J].Oil Geophysical Prospecting,1997,32(Sup1):135-140.(in Chinese))
[8]赵燕峰,娄海.道路探地雷达在高速公路检测技术中的应用[J].河南师范大学学报:自然科学版,2004,32(2):98-100.(ZHAO Yanfeng,LOU Hai.The applications and test technology with exploring land radar on expressway[J].Journal of Henan Normal University:Natural Science,2004,32(2):98-100.(in Chinese))
[9]杨天春,吕绍林,王齐仁.探地雷达检测道路厚度结构的应用现状及进展[J].物探与化探,2003,27(1):79-82.(YANG Tianchun,LYU Shaolin,WANG Qiren.The application and development of GPR in detection of pavement thickness and highway structures[J].Geophysical and Geochemical Exploration,2003,27(1):79-82.(in Chinese))
[10]徐升才,刘峰.探地雷达在城市道路厚度检测中的研究与应用[J].华东交通大学学报,2000,17(4):24-28.(XU Shengcai,LIU Feng.The research and application of GPR to detect thickness in city road[J].Journal of East China Jiaotong University,2000,17(4):24-28.(in Chinese))
[11]赵昕,黄琪,李海滨.路面基层厚度探地雷达检测效果分析[J].路基工程,2009(5):81-82.(ZHAO Xin,HUANG QI,LI Haibin.Analysis on thickness of pavement base GPR detection[J].Subgrade Engineering,2009(5):81-82.(in Chinese))
[12]范跃武,李修忠,白兴盈,等.探地雷达检测公路结构层裂缝实用方法研究[J].公路交通科技,2007,24(6):1-7.(FAN Yuewu,LI Xiuzhong,BAI Xingying,et al.Study on highway structure layer crack detection by ground penetrating radar[J].Journal of Highway and Transportation Research and Development,2007,24(6):1-7.(in Chinese))
[13]谢昭晖,李金铭.探地雷达技术在道路路基病害探测中的应用[J].地质与勘探,2007,43(5):92-95.(XIE Zhaohui,LI Jinming.Application of ground penetrating radar technique in the detection of roadbed disease[J].Geology and Prospecting,2007,43(5):92-95.(in Chinese))
[14]姜洪,王选仓.探地雷达对路面板脱空现象检测时的信号分析与处理[J].公路交通科技,2010,27(1):22-27.(JIANG Hong,WANG Xuancang.Signal analysis and processing for detecting void phenomenon under concrete pavement by using ground penetrating radar[J].Journal of Highway and Transportation Research and Development,2010,27(1):22-27.(in Chinese))
[15]贾辉,陈昌彦,白朝旭,等.城市道路病害检测中常见干扰源探地雷达图像特征分析[J].工程勘察,2012(11):86-92.(JIA Hui,CHEN Changyan,BAI Zhaoxu,et al.Common interference GPR image and its characteristic analysis in city road disease detection[J].Geotechnical Investigation&Surveying,2012(11):86-92.(in Chinese))
[16]曾海,张东长.地质雷达在混凝土路面板脱空检测中的应用探讨[J].公路交通技术,2005(3):72-74.(ZENG Hai,ZHANG Dongchang.Discussion on inspecting the hollow in concrte plane road using GPR[J].Technology of Highway and Transport,2005(3):72-74.(in Chinese))