探地雷达法在水工隧洞超前地质预报中的应用

The Application of Ground Penetrating Radarin Advance Geology Forecast for Hydraulic Tunnel Works

某长隧洞引水式电站地处喜马拉雅褶皱带的“Hazara-Kashmir并合带”上,地质构造情况十分复杂,隧洞施工中结合前期勘察资料,在分析宏观区域地质情况的前提下,利用探地雷达法开展超前地质预报工作,实践表明当地球现场采集干扰小、物理条件有利的情况下,预报成果与实际揭露地质情况基本一致,便于科学指导设计及现场施工,从而避免事故、保证安全、提高效率、缩短工期、节省投资等,故有着重大的经济效益和社会效益。

A long tunnel diversion-type hydropower station is located at“Hazara-Kashmir Merging Zone”of Himalayan fold belt,with a sophisticated geological structure.Referring to the survey documents made in early period for the tunnel works,the method of Ground Penetrating Radaris used for advance geology forecast based on analysis made on macro regional geology.The practice proved that when there is favorable physical conditions with a little earth interference for collection on site,the result of forecast is consist with the actually revealed geology structure.It is convenient for design and execution onsite under scientific guidance for avoiding occurring accident,assuring safety,improving efficiency,shortening construction period and saving investment and so on.So,it has significant economic benefit and social benefit.