全空间瞬变电磁法在平阳隧道超前预报中的应用研究

Application research of full-space transient electromagnetic method in advanced geological prediction of Pingyang Tunnel

岩溶地区铁路隧道施工中遇到的含水不良地质体会对生产安全造成一定的危害。为有效掌握隧道施工期掌子面前方的地质情况,应用全空间瞬变电磁法,讨论该法在铁路隧道探测中的测线、测点布置和数据处理流程,利用其对低阻体敏感的特点,结合工程水文地质资料,分析并确定掌子面前方的裂隙含水带,取得理想效果。

The poor water-bearing geological bodies encountered in the construction of railway tunnels in karst areas will cause certain damage to construction safety. In order to effectively grasp the geological conditions in front of the tunnel face during construction,this paper applies the full space transient electromagnetic method to examine the measuring lines,layout of measuring points and data processing flow in full-space transient electromagnetic method tunnel detection. Based on its sensitivity to low resistivity body and combined with engineering hydrogeological data,the fissure water-bearing zone in front of the tunnel face is analyzed and determined,and ideal results are achieved.