The compression wave velocity was detected with piezoelectricity acceleration sensors. Desaturation model tests of saturated sand foundation in the condition of constant current intensity were carried out and the wave velocity properties of saturated sand foundation in the process of electrolysis were analyzed. The results show that piezoelectric acceleration sensor not only meets the basic requirements of electrolytic method for reducing the test apparatus, but also meets the accuracy requirements of the large model wave velocity test. At the initial stage of electrolytic desaturation process, the decreasing amplitude of the compression wave velocity increases with the increase of current intensity. The influence of current intensity on the compression wave velocity is gradually weakened, and the wave velocity tends to be stable. Finally, it maintains at 0.33 km/s, and is not affected by current intensity any more.%采用压电式加速度传感器对压缩波速进行检测,开展饱和砂土地基在恒定电流下的电解减饱和模型试验,并分析饱和砂土地基在电解过程中的波速特性.研究结果表明:压电式加速度传感器不仅满足电解减饱和法对测试仪器的基本要求,而且符合大模型波速试验的精度要求.在电解减饱和初期,压缩波速的降幅随着电流的增大而增大;之后电流对压缩波速的影响逐渐减弱,波速逐渐趋于稳定;最后,波速维持在0.33 km/s,不受电流的影响.
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