非饱和土中球形孔扩张的弹塑性分析  

Elastic-plastic solution of expansion of sphere cavity in unsaturated soils

作　　者：胡伟[1] 刘明振[1] 

机构地区：[1]西安建筑科技大学土木学院,陕西西安710055

出　　处：《岩土工程学报》2006年第10期1292-1297,共6页Chinese Journal of Geotechnical Engineering

摘　　要：在考虑土体体积变化的前提下,应用圆孔扩张理论,结合修正剑桥模型推导出了非饱和土中球形孔扩张后,土体中应力、位移分布的解析解;并分析了超固结比对结果的影响。其结论可为非饱和土地区的沉桩、静力触探等岩土工程问题提供理论依据。Considering the variation of volume of soils, the analytical expressions for distribution of the stress and displacement in unsaturated soils after the expansion of spheric cavity could be deduced on the basis of the cavity expansion theory combining with the Modified Cambridge Model. Then, the effect of the over-consolidation ratio on the results was analyzed. The theoretic instructions for some geotechnical engineering problems in unsaturated soil areas could be provided, such as the penetration of piles, cone penetration tests, etc.

关 键 词：圆孔扩张理论 修正剑桥模型 相关联流动法则 超固结比 大变形 

分 类 号：TU431[建筑科学—岩土工程]