复合地基面积置换率  

Area replacement ratio of composite ground

作　　者：闫明礼[1] 罗鹏飞[1] 佟建兴[1] 孙训海[1] 

机构地区：[1]中国建筑科学研究院地基所,北京100013

出　　处：《工程勘察》2014年第9期30-35,共6页Geotechnical Investigation & Surveying

摘　　要：针对目前计算复合地基面积置换率存在的问题,给出复合地基面积置换率的普遍表达式,通过算例对比分析的方式,指出采用等效圆直径的方法计算面积置换率可能发生的问题。并基于静力平衡方程,推导单一桩型和多桩型复合地基承载力特征值的普遍表达式,进一步验证复合地基面积置换率普遍表达式的合理性。According to the current problems existing in calculating the area replacement ratio of composite ground,the general expression for the area replacement ratio of composite ground is given.The possible problem in calculating area replacement ratio of composite ground by using the method of equivalent circle diameter is pointed out.Based on static equilibrium equation,the general expression for the characteristic value of the bearing capacity of single-type-pile and multi-type-pile composite ground is derived,and the rationality of the area replacement ratio of composite ground is further verified.

关 键 词：面积置换率 等效圆直径 单一桩型复合地基 多桩型复合地基 

分 类 号：TU4[建筑科学—土工工程]