高密度地震映像法在青草沙水库堤基检测中的应用

青草沙水库新建大堤深槽段采用分层抛填砂袋构筑堤基,为切实了解抛填袋装砂的施工质量是否达到设计要求,本文摒弃传统的钻探抽检方法,首次采用水域高密度地震映像法对抛填砂袋体形态进行检测,以查明水下抛填砂袋体的平整度、厚度及空隙分布情况。实践表明,本次采用的水域高密度地震映像法经济、快速、有效,采集数据信息量大,能有效反映整个抛填砂袋体的表面起伏形态、厚度分布和砂袋体内部搭接异常情况,取得了很好的检测效果,可在以后的类似工程中推广使用。

Application of High Density Seismic Imaging Method to Dike Foundation Detection of Qingcaosha Reservoir

The new dam embankment foundation of Qingcaosha Reservoir is constructed layer-by-layer by sand bags.In order to inspect whether the construction quality meets the design requirements,we firstly applied high density seismic imaging method to detect the flatness,thickness and gap distribution of the underwater multi-layer sand bags.Experiment results show that it is feasible to detect the undulating surface morphology,thickness and gap distribution of multi-layer sand bags inside by using high density seismic imaging method.Also,it is practical to apply high density seismic imaging method in similar projects in future.