基于移动阵列电极的盾构超前探测正演响应分析

针对现有超前探测技术探测空间狭小、电磁干扰严重且难以应用于隧道掘进机（Tunnel Boring Machine，简称TBM）施工隧道等难题，采用一种基于移动阵列电极的盾构超前探测方法。运用Comsol Multiphysics有限元仿真软件建立地电模型，对不同地质情况进行正演响应分析。结果表明：存在保护电极时，电压分布范围明显扩大，表明探测范围增大，为提高探测效果，有必要添加保护电极；异常体的尺寸、形状、位置改变会影响测量电压分布呈现规律性变化，表明这种方法对异常反应的响应良好；通过移动阵列电极盾构超前探测物理模型实验结果对比证明了基于移动阵列电极的盾构超前探测方法的可行性。

Forward response analysis of shield advanced detection with moving array electrode

Aiming at problems of narrow detection space,serious electromagnetic interference,difficult application in TBM(Tunnel Boring Machine)tunnel construction and so on,a method of shield advanced detection based on moving array electrodes is adopted.Using Comsol Multiphysics finite element simulation software to establish geoelectric model,forward response analysis is carried out for various geological conditions.The results show that adding the protective electrodes can obviously enlarge the voltage distribution range,which means the detection range increases.In order to improve the detection effect,it is necessary to add protective electrodes.Changes in the size,shape and position of the anomalous body will exhibit regular changes on measured voltages distribution,which means this method has a good response to abnormal reaction.Though comparing the results of physical model experiment,the feasibility of the advanced detection method of shield based on moving array electrode is proved.