摘要
面波法的理论基础是英国学者瑞利提出的半无限弹性均匀介质中的瑞利面波理论,及其后来发展的半无限弹性层状介质中的频散理论,所有这些理论的前提是半无限弹性空间,对于像水泥土搅拌墙等水平方向宽度有限,并且往往宽度很小的弹性介质,对其瑞利面波的特性研究的很少。对于有限宽度弹性介质,根据其边界条件的不同可以简化为平面应力、平面应变、弹性约束三种情况。通过理论分析发现三种情况下,其瑞利面波(直达波)的速度与半无限弹性空间中的瑞利面波速度相差很小,并通过室内模型试验验证了这一结论,为瑞利面波在水泥土搅拌墙等宽度有限的弹性介质中的应用提供了科学依据。
Surfacewave theory was firstly proposed by Rayleigh which can be used in even medium; many other learners developed Rayleigh抯 theory and proposed another theory which can be used in layered medium. But all of the methods are based on semi-infinite elastic space; there is a little research in the medium which has the limited dimension in horizontal direction, such as the deep-mixing wall. According to the boundary condition, the deep-mixing wall can be simplified as plane-stress, plane-strain and elastic restriction. Author finds that the Rayleigh wave抯 velocities are almost the same in the three conditions as in the semi-infinite elastic space and check out the result by the model-test in laboratory so as to provide the scientific testimony for the Rayleigh wave抯 application to limited dimension medium.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2003年第4期598-602,共5页
Rock and Soil Mechanics
