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[1]欧元超,胡富彭,谭磊,等.城市地铁岩溶隐患多孔电阻率联合成像技术研究*[J].中国安全生产科学技术,2021,17(4):141-146.[doi:10.11731/j.issn.1673-193x.2021.04.023]
　OU Yuanchao,HU Fupeng,TAN Lei,et al.Study on multi-hole resistivity combined imaging technology of karst hidden dangers in urban subway[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(4):141-146.[doi:10.11731/j.issn.1673-193x.2021.04.023]
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城市地铁岩溶隐患多孔电阻率联合成像技术研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年4期
页码:
141-146
栏目:
职业安全卫生管理与技术
出版日期:
2021-04-30

文章信息/Info

Title:
Study on multi-hole resistivity combined imaging technology of karst hidden dangers in urban subway
文章编号:
1673-193X(2021)-04-0141-06
作者:
欧元超; 胡富彭; 谭磊; 姜寒阳; 陈兴海
(1.安徽理工大学 地球与环境学院，安徽 淮南 232001；
2.南京南大岩土工程技术有限公司，江苏 南京 210000；
3.浙江省水利河口研究院（浙江省海洋规划设计研究院），浙江 杭州 310020；
4.安徽惠洲地质安全研究院股份有限公司，安徽 合肥 230601)
Author(s):
OU Yuanchao;  HU Fupeng;  TAN Lei;  JIANG Hanyang;  CHEN Xinghai
(1.School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China;
2.Nanjing Nanda Geotecnical Engineering Co.,Ltd.,Nanjing Jiangsu 210000,China;
3.Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design),Hangzhou Zhejiang 310020,China;
4.Anhui Huizhou Geology Security Institute Co.,Ltd.,Hefei Anhui 230601,China)
关键词:
隧道施工安全; 地质灾害; 溶洞探测; 跨孔电阻率CT; 三维电阻率反演
Keywords:
tunnel construction safety;  geological disaster;  karst cave detection;  cross-hole resistivity CT;  3D resistivity inversion
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2021.04.023
文献标志码:
A
摘要:
为有效解决二维电法在探测异常体空间形态上的不足，基于有限差分算法，建立溶洞与跨孔电阻率组合模型，探讨溶洞剖面投影位置及偏移距与电阻率响应变化特征，将跨孔电阻率数据体进行跨孔三维联合反演成像。结果表明：溶洞模型距跨孔探测剖面较近时，实际投影至剖面上位置不同，导致探测效果差异较大；随溶洞模型偏移距增大，溶洞投影中心位置电阻率整体表现为前期缓慢、中期迅速、后期减缓并最终趋于稳定的非线性变化趋势，溶洞模型旁侧效应影响范围约8 m。三维联合反演结果能立体可视化展示溶洞空间发育形态，在城市地铁超前地质灾害精准探测方面具有一定应用价值。
Abstract:
In order to effectively solve the shortcomings of the two-dimensional electrical method in detecting the spatial morphology of anomalous bodies,based on the finite difference algorithm,a combined model of karst cave and cross-hole resistivity was established,and the response variation characteristics of resistivity section caused by the projection position and offset of the karst cave profile were discussed.The idea of conducting multihole three-dimensional resistivity combined imaging on the interhole profile resistivity data volume was proposed,and the verification was conducted combining with the advanced detection engineering case of karst cave in the urban subway.The results showed that when the karst cave model was closer to the crosshole detection profile,the position of actual projection to the profile was different,and the detection effect had greater difference.As the offset of karst cave model increased,the resistivity at the center of karst cave projection overall presented the nonlinear increase stage of slow in the early stage,rapid in the middle stage,slowing down in the later stage and eventually tending to be stable,and the side effect influence range of the cave model was about 8 m.Compared with the 2D cross-hole resistivity CT inversion,the 3D combined inversion could stereoscopically and visually display the spatial development morphology of karst caves in the survey area.The research results have certain application value in the advanced accurate detection of geological disasters in urban subway.

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备注/Memo

备注/Memo:
收稿日期： 2021-01-27
* 基金项目： 国家重点研发计划项目（2016YFC0600900）；安徽理工大学研究生创新基金项目（2019CX1002）；浙江省基础公益研究计划项目（LGF20D040001）；浙江省水利科技项目（RB1901）
作者简介： 欧元超，博士研究生，主要研究方向为工程与环境地球物理探测。
更新日期/Last Update: 2021-05-09