砂岩及其坡积物结构面的地质雷达图像解译——以超强地面耦合50MHz雷达天线探测为例
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摘要
白鹤滩地区下覆地层具有含水量高、透水性差、强度低等特征,可能会在工程中引发地质灾害等问题。利用超强地面耦合50MHz雷达天线,采用剖面法研究砂岩及坡积物区域地层结构,获取了砂岩及坡积物之间不同结构面的波形特征,并且在雷达图像上客观地反映砂岩及坡积物地区地层变化情况。针对探测区实际情况优选地质雷达探测及具体应用,并对图像资料进行精细的解译,确定了地层结构面的纵向变化情况,清晰地反映出基岩内部特征,也对地质雷达高分辨率野外数据采集、分析有着重要的参考价值。
The low layer of the sandstone in the Baihetan district exhibits large water content,difficult water permeability and low pressure intensity which may cause geological disasters in the future projects.The formation structure of the sandstone and the slope wash district is studied using the rough terrain GPR with 50 MHz frequency antenna by arranging GPR profiles.The characteristics of the image of the structural interface between the sandstone and the slope wash are obtained.In this way,the radar images can objectively reflect the alterative formation structure.Based on the above information,the paper focuses on the priority adoption of the GPR measurement and the practical application of the GPR according to the particular condition of the prospecting area.The precise interpretations of the images are expounded as well,which help to determine the vertical changes of the formation structure interfaces in the prospecting area and also clearly reflect the characteristics of lithologic variation.Furthermore,this produces a great referential value for the high resolution GPR data collection and analysis in an open air.
The low layer of the sandstone in the Baihetan district exhibits large water content,difficult water permeability and low pressure intensity which may cause geological disasters in the future projects.The formation structure of the sandstone and the slope wash district is studied using the rough terrain GPR with 50 MHz frequency antenna by arranging GPR profiles.The characteristics of the image of the structural interface between the sandstone and the slope wash are obtained.In this way,the radar images can objectively reflect the alterative formation structure.Based on the above information,the paper focuses on the priority adoption of the GPR measurement and the practical application of the GPR according to the particular condition of the prospecting area.The precise interpretations of the images are expounded as well,which help to determine the vertical changes of the formation structure interfaces in the prospecting area and also clearly reflect the characteristics of lithologic variation.Furthermore,this produces a great referential value for the high resolution GPR data collection and analysis in an open air.
引文
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[16]赵国平,王丽娟,张立勤,等.地质雷达在追踪软弱地层纵横向变化中的应用[J].北京工业职业技术学院学报,2005,4(2):43-46.
[17]王建民,刘财,杨宝俊,等.地质雷达技术在表层地震地质条件调查中的应用[J].石油物探,2003,42(1):54-58.
[2]谭绍泉,刘泰生,徐锦玺,等.地质雷达技术在表层结构调查中的应用与研究[J].石油物探,2003,42(1):59-67.
[3]程竹华,张佳宝,朱安宁.地透雷达技术概述及其在土壤学研究中应用的前景[J].土壤,2003,35(1):22-23.
[4]邓居智,刘庆成,陈德明.探地雷达技术在探测边坡破碎带中的应用[J].华东地质学院学报,2003,26(3):264-266.
[5]陈爱云,方云.地质雷达在石质文物保护工程中的应用[J].西部探矿工程,2003,15(8):165-166.
[6]王惠濂,李大心,邓世坤,等.探地雷达在建筑地基探测中的应用[J].地球科学,1993,18(3):323-328.
[7]李大心.探地雷达方法与应用[M].北京:地质出版社,1994:15-25.
[8]王元君,施泽进,杨轮凯,等.探地雷达在顶管施工隐患检测中的应用[J].成都理工大学学报(自然科学版),2006,33(1):70-72.
[9]北京鑫衡运科贸有限责任公司.2005年瑞典地质雷达应用讲座[R].成都:西南交通大学,2005.
[10]SCHELLENTRAGER G W,DOOOLITTLE J A,CALHOUN T E,et al.Using ground-penetratingradar to update soil survey information[J].Soil SciSoc Am J,1988,52:746-752.
[11]COLLINS M E,SCHELLENTRAGER G W,DOOLITTLE J A,et al.Using ground-penetratingradar to study changes in soil map unit compositionin selected Histosols[J].Sci Soc Am J,1986,50:408-412.
[12]DOOLITTLE J A.Using ground-penetrating radarto increase the quality and efficiency of soil surveys[C]//Soil Survey Techniques.Soil Sci Soc AmSpecial Pub 20,1987:11-32.
[13]PUCKETT W E,COLLINS M E,SCHELLEN-TRAGER G W.Design of soil map units on a karstarea in West Central Florida[J].Soil Sci Soc Am J,1990,54:1068-1073.
[14]孙洪星,张文.地质雷达探测技术在近地表弱地基勘察中的应用[J].煤矿开采,2000,5(4):10-12.
[15]DAVIS J L,Annan P.Ground-penetrating radar forhigh-resolution mapping of soil and rock stratigra-phy[J].Geophysical Prospecting,1989,37(3):531-551.
[16]赵国平,王丽娟,张立勤,等.地质雷达在追踪软弱地层纵横向变化中的应用[J].北京工业职业技术学院学报,2005,4(2):43-46.
[17]王建民,刘财,杨宝俊,等.地质雷达技术在表层地震地质条件调查中的应用[J].石油物探,2003,42(1):54-58.
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