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一、前言在有关场地因素分析中,往往应用到层状地基的动力性质。其中,剪切波速做为地基动力性质评价在工程应用中占有主要地位。这不仅仅是因为它与地基的强度、变形特性等诸常数间有着密切关系(例如标贯N值、横向地基系数K,单轴压缩强度等),而且也在于它可用较简便的仪器和方法测得。因而近些年来,在层状土地震反应分析,小区域划分研究,场地土分类指标,机械基础设计,结构物和地基相互作用分析,铁路、公路桥梁抗震分析,软弱地基鉴定和改良,地下管线抗震设计等方面都获得了广泛应用。常用的剪切波速测试方法有折射波法、
I. INTRODUCTION In the analysis of relevant site factors, it is often applied to the dynamic nature of layered foundations. Among them, the shear wave velocity plays an important role in the evaluation of the dynamic properties of foundations in engineering applications. This is not only because it is closely related to the constants such as the strength and deformation characteristics of the foundation (such as the standard N value, lateral foundation coefficient K, uniaxial compressive strength, etc.), but also because it can use simpler instruments and methods. Measured. In recent years, seismic response analysis of layered soils, small-scale regionalization studies, site-site classification indicators, mechanical foundation design, interaction analysis of structures and foundations, seismic analysis of railways and highway bridges, identification and improvement of weak foundations, underground pipelines Seismic design and other aspects have been widely used. The commonly used shear wave velocity test methods include the refracted wave method,