摘要
隧道施工过程中对隧道掌子面前方一定范围内的地质情况进行超前探测和预报是保证隧道施工安全的关键步骤。地质雷达是一种广泛用于地质探测的高频电磁脉冲波技术,根据雷达的叠加速度和走时方程并结合含水量与介电参数的经验关系,可有效地对掌子面前方的地下水发育情况进行探测。结合江边电站引水隧道实际工程,对引水隧道某富水区进行地质雷达超前预报,实践证明地质雷达在超前探水方面能取得了较好效果。
The key technologies to ensure the safety of the tunnel construction is to detect and forecast geological conditions of the area in front of tunnel working face.Ground Penetrating Radar（GPR） is a kind of high-frequency electromagnetic pulse technology,which is widely used in geological exploration.According to the superposition of the radar speed and travel time equation in combination with empirical relationship between water content and dielectric parameters,it can predict groundwater development situation in front of the working face effectively.In this article,combined with practical tunnel of Jiangbian Hydropower Station,the GPR technology was adopted to predict the area of a water-rich tunnel.Practice shows that GPR can detect water effectively.
出处
《土工基础》
2010年第4期88-90,共3页
Soil Engineering and Foundation
基金
山东省自然开学基金面上项目(编号Y2007F53)
关键词
隧道
超前地质预报
地质雷达
地下水
tunnel
geological prediction
ground penetrating radar
groundwater
作者简介
李镐，男，1958年生，高级工程师，主要从事水利水电工程、岩石力学和工程地质灾害防治等方面的研究工作。
