基础刚度对刚性桩复合地基桩土荷载分担比的影响  

Effect of foundation rigidity on pile-soil load share ratio of rigid pile composite foundation

作　　者：孙训海[1] 许力和 李艳霞[2] 佟建兴[1] 雷晓雨[3] 

机构地区：[1]中国建筑科学研究院地基所,北京100013 [2]中国天辰工程有限公司,天津300400 [3]天津大学建筑工程学院,天津300072

出　　处：《岩土工程学报》2010年第6期850-855,共6页Chinese Journal of Geotechnical Engineering

摘　　要：结合甲醇储罐基础的现场试验,对不同基础刚度条件下的刚性桩复合地基桩、土承载力发挥系数和桩、土荷载分担比进行了研究。试验表明:基础刚度对桩、土承载力的发挥和荷载分担比具有显著的影响,在给定褥垫厚度、相同桩长、相同桩距条件下,基础刚度较大的桩承载力能充分发挥,柔性基础条件下桩间土承载力能充分发挥,桩承载力发挥很少。基础刚度较大的刚性桩复合地基的桩荷载分担比比柔性基础桩荷载分担比大,而柔性基础土荷载分担比比刚性基础土荷载分担比大。On the basis of field tests on carbinol storage tank foundation,investigations are conducted on the bearing capacity and pile-soil load share ratio of rigid pile composite foundation with different rigidities.Studies show that change of the foundation rigidity has significant effect on the development of pile-soil bearing capacity and load share ratio.Under the same cushion thickness,pile length and space,the bearing capacity of pile and soil can both develop sufficiently for the foundation with enough rigidity.While for the flexible foundation,the bearing capacity of soil between the piles can develop sufficiently,but that of the piles develops little.The pile load share ratio of rigid pile composite foundation is larger than that of flexible foundation.But the soil load share ratio of flexible foundation is larger than that of rigid foundation

关 键 词：刚性桩复合地基 基础刚度 柔性基础 发挥系数 褥垫 分担比 

分 类 号：TU473[建筑科学—结构工程]