地质雷达在检测和绘制岩石边坡中裂隙分布图方面的应用

岩石塌落和基岩中的塌陷道路维护与预防灾害造成的严重问题，基岩中以裂隙的发育被认为是引起塌陷的实际原因，评估基因塌陷的危险性时，很重要提不仅需要预先检测地表裂缝分布，还要检测内部裂隙分布的范围，为研究地质雷达（ＧＰＲ）在绘制岩中内部裂隙分布及其连续性方面的可应用性，在熔吉岩采石场的垂向壁布进行了地质雷达测量，用地质雷达检测到了４ｍ深处基岩内部裂隙的反射波，通过地质雷达记录号岩石表面可视条件下记录的对     

高频雷达在混凝土无损检测中的应用及关键技术

本文阐述了混凝土体无损检测的基本方法技术。将地质雷达方法引入该领域中,结合工程实例研究地质雷达在混凝土非破损检测中的应用效果。并针对实际问题,利用分形技术对雷达资料进行处理,以提取雷达高分辨率信息。     

地质雷达资料的分析：波传播速度的测定

用地质雷达（ＧＰＲ）测深法也许能够检测出地下地质结构内毫米宽的不连续性，如裂隙，但是，根据野外资料确立一种电磁波传播速度的规律以便解释雷达数据和确定这些间断面的深部的位置却不是一件容易的事情，为了使不同场地的雷达探测资料得到最佳解释，我们的注意力转向精度问题，通过提高精度来确定电磁波的传播速度，在一花岗央采石场，借助４０ｍ深的钻孔岩心，根据正常时差校正，我们能够评价速度范围的分析，我们描述了轻度华     

综合勘探手段在复杂场地土石方检测中的应用研究

本文以深圳市某场地土石方检测的成果为例，介绍综合运用地质雷达，钻探手段解决复杂场地准确计算土石方量的技术问题，值得推广应用。     

利用土壤信息检验地质雷达的应用

在美国，自１９７８年以来，地质雷达已经作为一种土壤学工具在使用，国家合作土壤测量大纲曾经使用地质雷在突测土壤的性质，这些性质影响到土壤的利用，管理和分类，地质雷达主要用于估测土壤的变化性和分类的成分组成，图示横向范围，估测土壤层位和地质层的深度与厚度，以及对土壤进行测绘和解释，并非所有土壤同样适合地质雷达技术，土壤测量报告中发表的土壤绘图和分类被用来评价土壤和场对地于地质雷达的适用性，此外，用于定     

地质雷达技术指标的标定研究

近年来,地质雷达勘探作为一种重要的工程无损勘探方法,在我国已广泛应用,并取得了很多重要成果.目前,引进的地质雷达和我国自己生产的地质雷达种类很多,但对地质雷达设备本身性能指标的标定或评价方法却是个空白,本文参照美国德克萨斯交通学院和全美地质雷达使用者协会建议的方法对我们使用的地质雷达系统进行了性能标定,并根据勘探实践需要的指标,对地质雷达辐射子波和频率域参数的技术指标进行了标定方法的研究并给出了相应的结果.     

地质雷达技术在巴彦查干地区地震勘探中的应用

简要介绍地质雷达技术原理，利用大庆探区巴彦查干地区地质雷达实测资料进行解释，并结合微测井资料进行地区地震波表层层速度的教育处和静校正量的提取。结果表明，地质雷达能获得连续浅下地剖面，可弥补微测井资料的不足，因而在地震勘探表层地质调查和静校正量提取等方法方面上的有实际应用价值。     

地质雷达在乌拉山山前断裂探测中的应用

地质雷达是利用电磁波对地下不同电性介质进行探测的地球物理仪器，其探测速率快、分辨率高，可弥补探槽和其他地球物理方法存在探测盲区的缺陷，正在越来越多地应用于活动断层探测领域。本文以乌拉山山前断裂为例开展地质雷达探测工作，使用无人机正射影像技术对测线进行地形校正，获得断层浅部地质雷达图像。研究结果表明，本文研究方法能有效反映探槽揭露的地层单元和断层分布。本次探测中，雷达波形图像特征为:浅地表的土壤层反射波总体较弱；粗粒沉积为主的砾石层反射波总体较强，同相轴连续性好；细粒沉积为主的砂层反射波弱于砾石层，波形以中、高频为主，同相轴具有弱连续性；对于洪冲积地区，地质雷达能分辨具有一定特征的地层单元，这为剖面图像的断层识别提供了标志；通过无人机正射影像技术对地质雷达测线进行地形校正，有利于获得更为准确的探测结果。     

工程结构地下水病害电磁雷达检测技术研究

由于积水病害隐藏在一定厚度的钢筋混凝土层背后,加上积水空洞具体形态的不规则性以及洞内可能充填水分、空气、浆液、土等介质的因素,故其存在相当的复杂性。阐述了采用地质雷达对隧道衬砌质量进行无损检测的原理及方法,并对某隧道进行了健康诊断。通过对现场数据处理分析,可以精确探测衬砌厚度,确定钢筋及格栅钢架的分布位置及数量,查明衬砌背后特别是拱顶存在的空洞和回填不密实区域。同时,应用形态学处理方法对衬砌雷达图像进行特征提取,通过小波处理技术,直观且方便地得到了衬砌边界线和积水区域,发现了衬砌中的异常点。同时,对地质雷达探测结果采用钻孔法进行验证,两者相吻合。实践证明,使用地质雷达对隧道混凝土衬砌结构进行检测是切实可行的。     

地质雷达在公路滑坡加固治理中的应用

地质雷达能快速、准确地探测地下潜在的地质缺陷体的空间位置、形状大小及电性质等其他一些地质参数,可以为滑坡的加固设计、施工提供可靠的资料,简述了地质雷达的勘探原理和方法,并以实例说明了地质雷达在滑坡治理中的应用方法及效果。     

GPR reflection characteristics and depositional models of mud volcanic sediments—Wushanting mud volcano field, southwestern Taiwan

Ground penetrating radar (GPR) survey was conducted in the Wushanting mud volcano field (Yanchao, Kaohsiung) using a 500 MHz antennae, which allowed high-resolution imaging of subsurface structures. Seven GPR reflection characteristics are recognized. Sigmoid GPR reflection patterns resulted from a recent mud lobe deposited above an underlying older mud lobe front. Contorted GPR facies resulted from recent mud flow which encountered obstacles. Subparallel reflections resulted from mud volcano deposits of limited flowability, low velocity and gentle gradient. Hummocky reflection patterns are formed by interfingering of recent mud lobes building onto low land. Disrupted GPR facies were due to lateral breaks of continuity from mud cracks, which, according to field observation, can provide channels for erosion and form deeper erosion gullies. GPR time slices of different depths are rendered as a three-dimensional model. Approximately orbicular GPR reflection characteristics can indicate arcuate stacked mud lobe fronts of different periods. Some depositional models to explain GPR reflection characteristics can be founded upon observations of recent sedimentary phenomena. The models of this study may be applied to paleoenvironments and the depositional evolution of mud volcanoes in similar geological settings.     

探地雷达应用概述

以ASTM标准规范为基础对探地雷达（Ground Penetrating Radar 以下简称GPR）的地下探测方法的应用做了比较系统的概述，主要内容包括：部分专业术语的解释；测试过程中雷达探测深度及其中心频率、垂直分辨率、水平分辨率等的关系，测试过程中常见的天线移动方式，以及雷达波速的预测几种方法，数据显示方式；雷达数据解释和数据处理的一般过程及方法.目前我国尚没有关于GPR的国家规范或行业标准，文章对GPR的使用及规范的编制具有一定的参考意义.     

GPR reflection characteristics and depositional models of mud volcanic sediments—Wushanting mud volcano field,southwestern Taiwan

Ground penetrating radar (GPR) survey was conducted in the Wushanting mud volcano field (Yanchao, Kaohsiung) using a 500 MHz antennae, which allowed high-resolution imaging of subsurface structures. Seven GPR reflection characteristics are recognized. Sigmoid GPR reflection patterns resulted from a recent mud lobe deposited above an underlying older mud lobe front. Contorted GPR facies resulted from recent mud flow which encountered obstacles. Subparallel reflections resulted from mud volcano deposits of limited flowability, low velocity and gentle gradient. Hummocky reflection patterns are formed by interfingering of recent mud lobes building onto low land. Disrupted GPR facies were due to lateral breaks of continuity from mud cracks, which, according to field observation, can provide channels for erosion and form deeper erosion gullies. GPR time slices of different depths are rendered as a three-dimensional model. Approximately orbicular GPR reflection characteristics can indicate arcuate stacked mud lobe fronts of different periods. Some depositional models to explain GPR reflection characteristics can be founded upon observations of recent sedimentary phenomena. The models of this study may be applied to paleoenvironments and the depositional evolution of mud volcanoes in similar geological settings.     

Effect of medium electrophysical parameters and their temperature dependences on wideband electromagnetic pulse propagation

The dielectric permittivity of fiery spoil tips (Shakhty town, Rostov Region) is studied with the use of a GROT 12E remote-controlled ground-penetrating radar (GPR). An anomalous zone in a combustion source is shown to be clearly pronounced in GPR data due to the temperature dependence of the dielectric permittivity of these spoil tips. To substantiate this statement, the GPR data are compared with direct measurements of soil temperatures at depths from 1.5 to 2.5 m. The experimental results are compared with the variable spectral range of a GPR sounding pulse. GPR is shown to be a promising tool for the mapping of temperature-contrast underground objects.     

Simulation for ground penetrating radar (GPR) study of the subsurface structure of the Moon

Ground penetrating radar (GPR) is currently within the scope of China's Chang-E 3 lunar mission, to study the shallow subsurface of the Moon. In this study, key factors that could affect a lunar GPR performance, such as frequency, range resolution, and antenna directivity, are discussed firstly. Geometrical optics and ray tracing techniques are used to model GPR echoes, considering the transmission, attenuation, reflection, geometrical spreading of radar waves, and the antenna directivity. The influence on A-scope GPR echoes and on the simulated radargrams for the Sinus Iridum region by surface and subsurface roughness, dielectric loss of the lunar regolith, radar frequency and bandwidth, and the distance between the transmit and receive antennas are discussed. Finally, potential scientific return about lunar subsurface properties from GPR echoes is also discussed. Simulation results suggest that subsurface structure from several to hundreds of meters can be studied from GPR echoes at P and VHF bands, and information about dielectric permittivity and thickness of subsurface layers can be estimated from GPR echoes in combination with regolith composition data.     

地质雷达技术在地下管线探测中的应用

地质雷达作为一种新的探测方法,在城市管线探测过程中得到了越来越广泛的应用。本文结合RAMAC型地质雷达在嘉兴市管线普查中的实际应用,阐明了地质雷达的工作原理和方法,并得到了一些有意义的结论。     

RIS-K2型探地雷达在广州市管线普查中的应用

探地雷达作为一种新的探测方法,在城市管线探测过程中得到了越来越广泛的应用。本文结合RIS-K2型探地雷达在广州市管线普查中的实际应用,阐明了探地雷达的工作原理和方法,并得到了一些有意义的结论。     

Road evaluation with ground penetrating radar

This paper provides a status report of the Ground Penetrating Radar (GPR) highway applications based on studies conducted in both Scandinavia and the USA. After several years of research local transportation agencies are now beginning to implement GPR technology for both network and project level surveys. This paper summarizes the principles of operation of both ground-coupled and air-launched GPR systems together with a discussion of both signal processing and data interpretation techniques. In the area of subgrade soil evaluation GPR techniques have been used to nondestructively identify soil type, to estimate the thickness of overburden and to evaluate the compressibility and frost susceptibility of subgrade soil. In road structure surveys, GPR has been used to measure layer thickness, to detect subsurface defects and to evaluate base course quality. In quality control surveys, GPR techniques have been used for thickness measurements, to estimate air void content of asphalt surfaces and to detect mix segregation. Future developments are described where the technique has great potential in assisting pavement engineers with their new pavement designs and in determining the optimal repair strategies for deteriorated roadways.     

铁路路基雷达探测工作参数的设计

介绍了使用路检车装载探地雷达(Ground Penetrating Radar)对铁路路基检测的原理,结合野外探测过程中对测量深度、精度和行车速度的要求,给出了GPR现场工作测线布置的原则,理论上给出天线中心频率、时窗、采样率、测量点距的计算公式.讨论了连续测量和离散测量的关系,考虑到连续测量时水平精度的要求,给出行车速度必须满足的两个条件,从而确定行车速度的上限.为保证野外检测工作的顺利进行,结合实际情况给出了GPR工作参数的设计原则和流程.