软土基坑工程数值模拟研究
- 摘 要
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何金华
(上海铁道大学土木系 上海 200333)[提要] 基于将基坑支持问题简化为平面应变问题,土体为分层均匀、各向同性的弹粘塑性连续体和Mohr- Coulomb屈服准则及相关联的流动法则假定,作者采用粘弹塑性模型模拟了土的弹塑性和流变性,用有限元模拟基坑实际开挖全过程,对具体工程进行计算,讨论了土的流变参数。
[关键词] 软土 粘弹塑性 流变参数 有限元An elasto-viscoplastic model is used to imitate the elasto-plasticity and theology of soft soil. The whole
process of excavation is inutated by finite elements.A practical engineering problem is caculated with this method.
Keywords: soft soil; elasto-viscoplasticity; fluidity parameter; finite element