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一、前 言 振动水冲法作为防止饱和松砂地基地震时液化的有效措施被广泛采用.研究振冲过程中饱和砂土中超孔隙水压力性质有助于揭示砂基振冲加密和防止液化的机理. 关于以振冲器为振源饱和砂土超孔隙水压力的成因和特性已有专文论述.本文以现场超孔隙水压力实测资料为基础,除对超孔隙水压力某些性质作补充说明外,着重讨论饱和松砂振冲加密与超孔隙水压力的关系,振冲加密后超孔隙水压力变化及砂土抗液化效果. 二、振动超孔隙水压力的某些性质
I. INTRODUCTION The vibratory water erosion method is widely used as an effective measure to prevent liquefaction during the earthquake on saturated loose sand foundations. Studying the excess pore water pressure properties in saturated sand during vibration process helps to reveal the mechanism of vibroflotation and liquefaction prevention in sand foundations. The paper has discussed the causes and characteristics of the saturated pore water excess pore water pressure with a vibrator as the vibration source. This paper is based on the measured data of the excess pore water pressure in the field, except for the supplementary explanation of certain properties of the excess pore water pressure. , Focusing on the relationship between vibroflotation encryption and excess pore water pressure of saturated loose sand, the change of excess pore water pressure after vibration and the effect of anti-liquefaction of sandy soil. II. Some properties of vibration excess pore water pressure