基于统一强度理论的灰土挤密桩应力分析  

Stress analysis of lime-soil compacted pile based on the unified strength theory

作　　者：曹黎娟[1] 赵均海[1] 魏雪英[1] 

机构地区：[1]长安大学建筑工程学院,西安710061

出　　处：《岩土力学》2006年第10期1786-1790,共5页Rock and Soil Mechanics

基　　金：教育部博士点基金资助项目(No.20040710001);陕西省自然科学基金资助项目资助(No.2003E215)。

摘　　要：采用统一强度理论对灰土挤密桩应力进行研究,分析了灰土挤密桩挤密成孔过程及土体处于弹塑性状态时孔周应力情况,得出了灰土挤密桩成孔过程的弹性解及孔壁屈服时的弹性极限荷载,并求出了孔壁均布内压与塑性挤密半径的关系式。该解考虑了中间主应力及拉压性能差异的影响,Mohr-Coulomb解是特例。其结果对于全面研究灰土挤密桩的综合作用效用,进一步节约材料有一定的参考价值。The stresses of lime-soil compacted pile are analyzed based on the unified strength theory. The stress of the soil around the hole in the compaction and hole formation process of lime-soil compacted pile is discussed. The elastic solution and elastic limit load are obtained during the hole formation for lime-soil compacted pile; and the relationship between the pressure on the hole wall and the plastic radius is also obtained. This solution considered the intermediate principal stress effect and the strength difference effect in tension and compression. Mohr-Coulomb solution is a special example of this solution obtained. The obtained results have practical value for comprehensively studying the function of the lime-soil compacted piles.

关 键 词：统一强度理论 灰土挤密桩 平面应变 塑性挤密半径 

分 类 号：TU47[建筑科学—结构工程]