桩筏基础相对刚度及合理板厚的确定  

DEFINITION OF RELATIVE RIGIDITY AND PROPER RAFT THICKNESS OF PILE-RAFT FOUNDATION

作　　者：陈云敏[1] 陈仁朋[1] 黄海丹 

机构地区：[1]浙江大学岩土工程研究所,杭州310027 [2]河北省建筑设计研究院上海分院,上海200125

出　　处：《工业建筑》2005年第5期1-4,23,共5页Industrial Construction

摘　　要：采用考虑相互作用的桩筏基础简化分析方法,提出了一种新的桩筏基础相对刚度表达式,分析了桩筏基础相对刚度对筏板沉降、内力、桩顶反力分布的影响,研究了相对刚度与筏板长宽比的关系,并从发挥桩的承载力角度出发提出了合理板厚确定的公式。最后,用两个实例验证了板厚公式的合理性与工程应用的可行性。A new type of relative rigidity expression of pile-raft foundation is proposed using pile-raft foundation′s simplified analytic method with interaction taken into account,it is analyzed that the effect of pile-raft foundation′s relative rigidity on settlement of the raft,internal forces and reaction distribution of pile head;the relationship between the relative rigidity and length/width ratio of the raft is also researched.A rational formula of the raft thickness is put forward according to giving full play to the bearing capacity of the piles.Finally the rationality of the formula and the feasibility of engineering use are verified by two examples.

关 键 词：桩筏基础 相对刚度 合理板厚 承载力角度 高层建筑 

分 类 号：TU473.1[建筑科学—结构工程]