After the simple analyses with the single phased media theory , a more detailed analyses has been done , based on two phased media theory , on rayleigh wave propagation in saturated soil . the new results show that rayleigh wave will really cause larger shear stress and pore pressure than s wave in shallow layers and thus easily induce sand liquefaction 进一步，基于两相介质理论的有效应力法，研究了rayleigh波在饱水介质中的传播情况，给出了rayleigh方程，分析了饱水介质中产生的应力，并同单相介质模型的结果做了对比，证实了rayleigh波较s波可产生较大的剪应力和法向应力梯度，从而导致液化的论断。
On the basis of analyzing data from several field tests , assumption was proposed for the distribution of side friction along column under rigid raft , and settlements of column and soil in the composite foundation with single column were analyzed by totally stress method . the corresponding computer program was developed at the same time . 2 在对若干试验结果分析的基础上，提出了刚性基础下复合地基桩侧摩阻力分布形状的假定，然后基于总应力法分析了单桩复合地基中桩体和桩间土的沉降变形，并编制了相应的计算程序。
The seismic response is analyzed with total stress method ; and it ' s found that the positions of the most dangerous slide surfaces are fairly stable though the precision for searching is very high . the idea of newmark method is induced to calculate permanent deformation on circular sliding surfaces . the precision is increased and the complexity of searching is lessened 本文采用总应力法分析了填埋场在地震作用下的动力响应，通过计算发现，在滑弧搜索的精度相当高的情况下，最危险滑弧的位置仍然比较固定；在这一发现的基础上，引入newmark地震永久变形的思想，并将其运用于圆形滑动面从而提高了该方法的精度并减少了试算的繁复性。
Based on some macroscopic evidences gained in actual earthquake fields and on a preliminary theoretical analysis , it has been pointed out that the rayleigh waves should be an essential cause of liquefaction for the fields beyond the epicentral region with saturated sand deposits at shallow depths ( 4 )首先介绍了提出rayleigh波是液化主因的背景，基于宏观震害资料的启示，提出了rayleigh波可能是造成砂土液化的主要动因的新见解。并用单相介质模型的总应力法，分析了rayleigh波可能产生的应力大小。
Firstly , the paper introduced the present study state on dynamic characteristics of soft subgrade and composite foundation , generalized the present study state on interaction of pavement and foundation from theory study , experimental modeling and numerical analysis aspects . subsequently , the theory of elasto - plastic constitute and dynamic finite element method ( fem ) are summarized , the difference and applicability of total stress method and effective stress method are described . then , dynamic features of pavement materials , soft soil and composite foundation are depicted simply 本文首先介绍了软土地基和复合地基动力特性研究现状，从理论研究、试验模拟和数值分析三方面总结了道路与地基共同作用研究现状，接着概述了适合岩土材料的弹塑性本构理论和动态弹塑性有限元理论，叙述了总应力法和有效应力法动力分析的区别及适用性，然后概括了路面材料、软粘土和复合地基的动力特性。
Then , combined with the mechanism of vacuum preloading and based on the layer method , settlement calculation of vacuum preloading was analyzed . the study shows that the vacuum degree under membrane equivalent load method does not accord with the mechanism of vacuum preloading . based on the layer method , vacuum degree difference method and effective stress method are presented . the results show that the final settlement calculated by the vacuum degree difference method is more close to the observation results 然后，结合真空预压的机理，基于分层总和法的思想，对真空预压沉降计算方法进行研究：指出用现有的膜下真空度等效荷载法进行沉降计算不符合真空预压机理；提出了符合真空预压机理的真空度差值法与有效应力法，前者所推算的最终沉降量较接近实测推算结果，后者与实际结果存在一定差距。
