附加质量法检测中干扰荷载影响范围试验研究  

Experiment study on affecting range of disturbance load in additional mass method

作　　者：徐伟 徐思远[2] 段玉昌 蒋程晟 何新颖 XU Wei;XU Siyuan;DUAN Yuchang;JIANG Chengsheng;HE Xinying(Jiangsu Jurong Pumped Storage Co.,LTD.,Zhenjiang 212405,China;College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]江苏句容抽水蓄能电站有限公司,江苏镇江212405 [2]河海大学水利水电学院,江苏南京210098

出　　处：《人民长江》2020年第6期184-188,共5页Yangtze River

摘　　要：附加质量法在土石坝堆石体密度检测中的应用越来越广泛,但在现场试验过程中测点周边的人员、设备等易形成干扰荷载,增加试验误差。依托江苏句容抽水蓄能电站,选取上水库主坝堆石料开展现场附加质量法试验,试验过程中在测点周边不同距离处施加干扰荷载,探究了干扰半径对频率测试结果的影响。试验中同样考虑了堆石体最大粒径的因素,在最大粒径分别为400,600,800 mm的3种堆石料中进行了重复试验,并讨论了干扰半径和试样最大粒径的相关性。结果表明:由于附加质量法现场试验过程中测点处的堆石体未和周边堆石体进行隔离,因此频率检测结果会受到周边一定范围内干扰荷载的影响,干扰半径与试料的最大粒径基本一致。The additional mass method is widely used in the density determination of earth-rock dam,however,the mass of apparatus and testers are disturbance loads,which can increase the error during the filed tests.In this study,additional mass method was carried out on the upper dam rock-fill material of Jiangsu Jurong pumped storage power station.Disturbance loads were placed in the different distances beside the test position to study how the disturbance range affected the frequency result of the additional mass method test.The maximum particle size was also considered.The experiment was repeated on three different rock-fill material with the maximum particle size of 400mm,600mm,and 800mm,the correlation between the interference radius and the maximum particle size of the sample was also discussed.The results showed that the frequency detection results were affected by the interference load in a certain range because the rock mass at the measuring points in the field test was not isolated from the surrounding rock mass,and the interference radius was almost the size of maximum particle.

关 键 词：干扰荷载影响范围 附加质量法 密度检测 最大粒径 句容抽水蓄能电站 

分 类 号：TV522[水利工程—水利水电工程]