车载瞬变电磁探测近距离含水异常体的仪器选择和线圈布置  

Instrument Selection and Coil Arrangement for Train-borne Transient Electromagnetic Method Detecting Water-bearing Anomalies in Short Distance

作　　者：李宗洋 漆泰岳[1] 覃少杰 钱王苹 LI Zongyang;Qi Taiyue;QIN Shaojie;QIAN Wangping(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031;School of Transportation and Civil Engineering,Nantong University,Nantong 226019)

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]南通大学交通与土木工程学院,南通226019

出　　处：《现代隧道技术》2022年第1期241-248,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(51278423,51478395,51978582)。

摘　　要：高速铁路运营隧道中与地下水有关的病害占比越来越高,亟需快速而精准的病害检测技术。利用车载瞬变电磁法检测运营隧道衬砌背后5~10 m内的含水异常体是一项全新的技术实践。鉴于隧道中含水异常体的特殊性,文章首先采用数值模拟方法对不同类型的含水异常体进行电磁特征研究,其次针对含水异常体的分布问题开展了数值模拟,最后针对数值模拟缺失的线圈电磁响应进行了物理模型试验。在试验中,通过对比不同的瞬变电磁仪器,验证了现有仪器对近距离含水异常体探测的可行性;并验证了异常位置变化时,近距离车载瞬变电磁探测系统的有效性。The percentage of groundwater-related defects in operating high-speed railway tunnels has been increasing with an urgent need for fast and accurate defect detection technologies. The use of train-borne transient electromagnetic method(TEM) to detect water-bearing anomalies within 5 to 10 meters behind the lining of operating tunnels is a new technical practice. In view of the uniqueness of water-bearing anomalies in tunnels, this paper first adopts the numerical simulation method to study the electromagnetic features of different types of water-bearing anomalies, then carries out numerical simulations for the distribution of water-bearing anomalies, and finally conducts physical model tests for the electromagnetic response of coils missing from the numerical simulations. In the tests, the feasibility of existing instruments for detecting water-bearing anomalies in short distance is verified by comparing different TEM instruments, as well as the effectiveness of the close-distance train-borne TEM detection system when the anomalous position changes.

关 键 词：瞬变电磁法 隧道病害 近距离探测 仪器选择 线圈布置 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]