孔中雷达法探测孤石的研究

doi:10.3973/j.issn.1672-741X.2016.10.009

隧道建设（中英文） ›› 2016, Vol. 36 ›› Issue (10): 1221-1225.DOI: 10.3973/j.issn.1672-741X.2016.10.009

孔中雷达法探测孤石的研究

党如姣

（中铁隧道勘测设计研究院，河南洛阳 471009）

收稿日期:2016-03-18 修回日期:2016-05-26 出版日期:2016-10-20 发布日期:2016-11-01
作者简介:党如姣（1987—），男，河南漯河人，2010年毕业于中国地质大学（武汉），地球信息科学与技术专业，本科，工程师，现从事隧道及地下工程施工与科研工作。Email： 396704357@qq.com。

Study of Boulder Detection by Ground Penetrating Radar Combined with Drillhole

DANG Rujiao

（Survey, Design and Research Institute of China Railway Tunnel Group, Luoyang 471009, Henan, China）

Received:2016-03-18 Revised:2016-05-26 Online:2016-10-20 Published:2016-11-01

摘要/Abstract

摘要：

盾构在花岗岩风化地层中掘进存在着极大风险，为解决花岗岩风化残留体精确探测的难题，采用理论分析、数值模拟和现场试验的方法对孔中雷达法探测孤石进行研究，研究表明： 1）采用孔中雷达法，配置100~200 MHz孔中天线，在地层差异明显的情况下能探测出测孔周围3~5 m、粒径在0.7 m以上的孤石； 2）在不均匀地层中，不同粒径的孤石在雷达探测剖面上的反射波信号响应特征差别很大，通过反射波的强度和速度可判断出孤石的大小和埋深； 3)在花岗岩风化地层中的现场试验探测结果与实际吻合，证明采用孔中雷达法探测孤石可行。孔中雷达法既能充分发挥钻孔的作用，又能在增加成本较小的情况下精确探测出隧道沿线孤石的分布情况，具有较好的推广应用价值。

关键词: 孔中雷达法, 孤石探测, 钻孔勘察, 花岗岩风化地层

Abstract:

It is difficult to accurately detect the boulder in weathered granite ground. As a result, shield machine boring in weathered granite ground is of great risk. The boulder detection method of ground penetrating radar combined with drillhole is studied by theoretical analysis, numerical simulation and site test. The study results show that: 1) The boulder diameter larger than 0.7 m and within 3-5 m scope around drillhole can be detected by setting 100-200 MHz radar antenna. 2) The reflected waves of boulders of different sizes in uneven strata vary greatly; and the size and cover depth of boulder can be accurately detected by observing the strength and velocity of reflected wave. 3) The site test results of weathered granite ground coincide with the actual results, which proves the rationality of the detection method. The boulder detection by ground penetrating radar combined with drillhole is worth popularizing.

Key words: ground penetrating radar combined with drillhole, boulder detection, drillhole investigation, weathered granite ground

中图分类号:

U 45

党如姣. 孔中雷达法探测孤石的研究[J]. 隧道建设, 2016, 36(10): 1221-1225.

DANG Rujiao. Study of Boulder Detection by Ground Penetrating Radar Combined with Drillhole[J]. Tunnel Construction, 2016, 36(10): 1221-1225.

[1]	赵晓鹏, 蒋辉, 赵永贵. 地震散射技术在盾构隧道海底孤石探测中的应用———以横琴隧道为例[J]. 隧道建设, 2019, 39(S2): 352-357.
[2]	杨亚璋. 越海盾构工程孤石探测技术探索[J]. 隧道建设, 2012, 32(5): 700-704.

孔中雷达法探测孤石的研究

Study of Boulder Detection by Ground Penetrating Radar Combined with Drillhole

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