摘要
针对直径为 30 0 mm的粗粒土试样 ,通过在试样周围填充细砂的方法来消除橡皮膜嵌入的影响。饱和固结不排水往返加荷三轴试验表明 ,由于橡皮膜嵌入的影响 ,延缓了孔隙水压力的上升 ,使试样的液化应力比增大 1 4%~ 1 8% ,在应用试验资料时 。
By filling peripheral specimen voids with fine sand the membrane penetration effects may be eliminated in coarse grained speciments of 300 mm in diameter with a maximum particle size of 60 mm. The saturated, consolidated, undrained cyclic triaxial test results on these specimens show that the membrane penetration delays the development of pore water pressure and increases the liquefaction stress ratio by 14%~18%. So the test results should be corrected when applied.
出处
《大坝观测与土工测试》
2000年第4期45-46,49,共3页
Dam Observation and Geotechnical Tests
关键词
粗粒土试样
橡皮膜嵌入
液化应力比
coarse-grained soil specimen
membrane penetration
liquefaction stress ratio