隧道瞬变电磁超前预报平行磁场响应探测方法

发布时间：2018-01-20 05:01

本文关键词： 隧道工程瞬变电磁法超前地质预报平行磁场响应　出处：《岩石力学与工程学报》2014年07期 　论文类型：期刊论文

【摘要】：通过三维数值试验和模型试验研究,分析平行磁场的响应特征,发现一些新的现象和规律,提出隧道瞬变电磁超前预报平行磁场响应探测方法。数值试验结果表明:(1)与掌子面平行的磁场响应对于判识掌子面前方的含水构造具有非常明显的响应特征;(2)对于垂直磁场响应无法识别的含水构造,平行磁场响应仍然具有很明显的响应特征。(3)当大规模含水构造距离掌子面较近时,平行磁场响应存在2次电动势反向的现象,可直接用于工程中水体的判识。采用数值方法计算TBM开挖隧道进行瞬变电磁超前预报时的响应特征曲线,提出的新探测方法有望应用于TBM开挖隧道的超前预报工作。
[Abstract]:The response characteristics of parallel magnetic field are analyzed by three-dimensional numerical test and model test, and some new phenomena and rules are found. The detection method of parallel magnetic field response for tunnel transient electromagnetic advance prediction is proposed. The numerical test results show that: 1). The magnetic field response parallel to the face of the palm has very obvious response characteristics for identifying the water-bearing structure in front of the face of the palm. (2) for water-bearing structures whose vertical magnetic field response is not identifiable, the parallel magnetic response still has obvious response characteristics when large-scale water-bearing structures are close to the surface of the palm. The parallel magnetic field response has the phenomenon of reverse electromotive force, which can be directly used to judge the water body in engineering. The characteristic curve of transient electromagnetic advance prediction for TBM tunnel excavation is calculated by numerical method. The proposed new detection method is expected to be applied to the advanced prediction of tunnel excavation in TBM.
【作者单位】：山东大学岩土与结构工程研究中心;长安大学地质工程与测绘学院;
【基金】：国家重点基础研究发展计划(973)项目(2013CB036002) 国家自然科学基金重点项目(51139004);国家自然科学基金面上项目(41174108)
【分类号】：U452.11
【正文快照】： 1引言隧道施工过程中经常面临突水、突泥等地质灾害,造成重大的经济损失,有的甚至造成人员伤亡。隧道超前地质预报是提前预测、预报掌子面前方含水构造的一种有效方法,能够在一定程度上有效避免部分突水突泥地质灾害的发生。瞬变电磁方法是一种基于电阻率差异的电磁感应勘探方

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