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

Abstract: 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 400 mm, 600 mm, and 800 mm, 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.

Key words: load disturbance, additional mass method, density test, maximum particle size, Jurong pumped storage power station;