摘要
对泊松比为 0 .2 5的匀质弹性地基 ,利用既有精确解和瑞利波近似解 ,分析了在竖向点源简谐激振下地表质点振动相位及其求出的瑞利波速随点 -源距、测点间距而变化的规律。研究结果表明 ,当由面波法检测R波速度的容许误差一定时 ,最小点 -源距将随测点间距的增大而减小 ,意味着目前的常用做法缺乏理论完备性。
Using the existing exact analytical and Rayleigh approximate solutions of vertical displacement at surface of a homogenous ground with the Poisson's ratio 0.25 under a vertical harmonic excitation, the variation of its phase angle as well as the computed R wave velocity with spacing between the exciting and measuring points is investigated in this paper. It was shown that,when the tolerable error of computed R wave velocity was limited, the minimum interval between the exciting and nearer measuring point would decrease with increasing spacing of two measuring points, which is quite different from the conventional establishment of a surface wave measurement.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2003年第1期63-66,共4页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目 (50 0 790 2 7)
关键词
面波法
检测
地基
波速
测点布置
subsoil
surface wave measurement
Rayleigh wave
arrangement of excitation and transducers
