【摘要】 某水电厂大坝为粘土斜墙堆石坝,其粘土防渗层的状态如裂纹、密实性、一致性等对大坝安全十分重要。本文应用锤击法对该大坝进行了实地测试,测试装备为GeometricsC48型地震勘探主机系统。对测试数据用Matlab软件分别进行了频散分析,衰减系数与能量分析,波速计算分析,有效评价了大坝粘土防渗层的状态。分析结果表明,大坝粘土防渗层第11列和12列之间,30列和31列测点之间存在明显的衰减系数突变带,个别点波速低。更多还原

【Abstract】 A rockfill dam with clay facing is studied and its earth blanket’s states such as crack,compactness and consistency are important to the safety of the dam.Spot test is carried on with Geometrics C48 seismic exploration system in this dam.Frequency dispersion,attenuation coefficient,energy and wave speed are analyzed for the testing data by Matlab software.The earth blanket’s state of the dam is estimated efficiently.It is indicated by the analysis result that there is break belt of attenuation coefficient between row11 and row12,row30 and row 31.Maybe there is long crack or loose soil.At the same time,the speed of some point is low.更多还原