一、引言当下层土的地层情况相似于讨论过的墨西哥城时,前几节内容对估计基础在强烈地面运动中的反应会具有实用忌义.可以推断体波当撞击深层下软土层时产生新的无旋的剪切波,同样也可以推断压缩波比剪切波具有较小的影响.当震源浅和近似及软土层埋藏不很深时,在地面引起的震波会有些影响. I. INTRODUCTION When the underlying stratum conditions were similar to those of Mexico City as discussed, the previous sections would have practical doctrines for the reaction of the estimation basis in strong ground motion. It can be inferred that body waves impact deep soft soil layers. The generation of new spinless shear waves can also be inferred that the compression wave has a smaller effect than the shear wave. When the shallow and approximate seismic source and the soft soil layer are not deeply buried, the ground-induced shock waves have some effects.