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飽和粉砂在振动作用下强度降低以至发生液化现象,与土的性质、原始应力状态及振动加速度都有关系,研究粉砂振动特性的試驗方法也应考虑到这些因素。本文采用振动三軸向压縮仪測定粉砂在不同密度和不同应力状态条件下振动破坏时的孔隙压力与振动加速度以及振动加速度为0.1g(g为980厘米/秒~2)时的孔隙压力与抗剪强度指标。振动三軸仪如图1所示。振动試驗台可发生垂直方向的諧振动,其頻率变化范围为
The strength of the saturated silt under vibration is reduced and liquefaction occurs, which is related to the nature of the soil, the original stress state, and the vibration acceleration. These factors must also be considered in the test method for studying the vibration characteristics of the silt. In this paper, the vibratory triaxial compressor was used to measure the pore pressure and vibration acceleration when the silt was broken under different density and stress conditions, and the pore pressure when the vibration acceleration was 0.1g (g is 980 cm/sec~2). With shear strength indicators. Vibratory triaxial apparatus is shown in Figure 1. The vertical vibration of the vibration tester can occur, and its frequency range is