饱和砂土中球形洞室的瞬态动力响应

Transient dynamic response of spherical cavity in saturated sands

本文视饱和砂土为流固两相介质，采用工程上通用的土力学模型，利用Ｌａｐｌａｃｅ变换求解了饱和砂土中球形洞室瞬态响应问题，得到了均匀受压球形洞室问题的解析解．经与弹性单相介质中均匀受压球形洞室对比，考察了流体对饱和砂土体动力响应的影响．本文为分析地下结构动力响应提供了一种有效的方法．

Based on the generally adopted soil model for engineering, taking saturated asnds as two phase medium,the problem about transient dynamic response of spherical cavity in saturated sands is solved and analytic solution for an equally pressurized spherical cavity is obtained.Compared with the same problem in one phase medium,the influence of fluid on dynamic response of saturated sands is investigated.An effective way for dynamic analysis of underground structure is presented in this paper.