With the appearance of more and more the high - rise and the super high - rise buildings , the pile - raft foundations have been widely used in the practical engineering 随着越来越多高层、超高层以及大型工业建筑的出现，桩筏基础在工程设计中得到了广泛地应用。
In this paper , the simplified analysis method of pile - raft foundations considering interactions of soil - pile - raft and the basic principles of the finite element method are explained 本文首先阐述了考虑土?桩?筏相互作用的桩筏基础简化分析方法和有限单元法的基本原理。
To simplify the analysis , a simplified analytical method considering the interactions of the rigidity of superstructures is put forward in this paper 为简化分析，本文在考虑土?桩?筏相互作用的桩筏基础简化分析方法基础上，提出了上部结构刚度对桩筏基础内力影响的简化分析方法。
The method is used in the optimum design of jiahe hotel in ningbo . four cases are " discussed and compared , the best one is chosen because it is economical and safe 并详细讨论了带裙房桩筏基础在设缝和不设缝情况下的裙房面积大小、主裙楼筏厚不同等情况下内力分布、沉降分布情况。
In this paper , the allocation mode of the piles , that is sparse in the exterior and dense in the interior , and the optimized method based on the settlement control are proposed 本文提出了外疏内密的布桩方法和沉降控制优化方法，并就常规桩筏基础设计提出建议以及给出了桩筏荷载分担比计算公式。
In designing and calculating plate of piled - raft foundation , thick - plate theory has been applied , that is , thick - plate finite element method is mainly used when load and deformation of plate are analyzed 桩筏基础筏板的设计、计算采用厚板理论分析，主要用厚板有限元法来分析筏板的受力、变形特点。
The design of pile - balsa foundation , in a long time , has been carried on according to routine pile foundation " design due to have no efficient computing method . the carrying capacity of soil ca n ' t get fully used 桩筏基础的设计，在很长一段时间里，由于计算手段的限制，只能按常规桩基础设计，桩间土的承载能力得不到发挥。
Based on " the simplified method to analyze soil - pile - raft interactions " , this article considers the raft rigidity of foundations and constructs an iterative algorithm to satisfy the concerted deformation 本文以桩筏基础简化共同作用分析方法为基础，考虑筏板刚度对下卧层附加应力的影响，构造满足地基基础间协调变形的迭代算法。
The working mechanism of pile - supported raft foundation under vertical load is similar to rigid - pile composite foundation , therefore , the methodology of composite foundation is applied to pile - supported raft foundation 摘要桩筏基础的竖向受力工作性状与刚性桩复合地基相似，尝试采用刚性桩复合地基有关理论及计算模式来分析桩筏基础的沉降变形工作状态。
The numerical analysis modal base has been built , which encapsulates some analysis methods such as the linked - poled method , the finite difference method , the finite element method of different kinds foundations 该库封装了对柱下条形基础分析的链杆法、有限差分法、有限元法，筏板基础分析的有限差分法、有限元法以及桩筏基础非线性有限元分析等类对象。
