一、前言随着对稳定性要求较高的大型或高层建筑工程的兴建,在抗震设计方面必须研究基础的动力反应。尤其土坝,它本身就是一个由土料填筑而成的土体工程,在研究其抗震性能时,无论采用理论分析或者模型振动试验,都需要了解土的剪切模量、弹性模量、泊桑比等力学参数,这就涉及到土动力学问题。目前,用以确定土动力特性的实验方法大体可分室内土样试验和现场原位试验两大 I. INTRODUCTION With the construction of large-scale or high-rise building projects requiring high stability, the basic dynamic response must be studied in seismic design. In particular, the earth dam, which itself is a soil engineering project filled with earth materials, is required to understand the shear modulus and elastic modulus of the soil, regardless of theoretical analysis or model vibration test when studying its seismic performance. Poisson’s ratio and other mechanical parameters, which involve the problem of soil dynamics. At present, the experimental methods used to determine the dynamic characteristics of soil can be roughly divided into two major indoor soil test and field in-situ test