桩筏基础设计的关键在于确定桩筏的荷载分担比及桩对减小沉降的作用。
The key point in the piled raft foundation design is to determine the proportion of load carried by piles and raft and the effect of diminished settlement of piles.
虽然当前已有考虑桩筏非线性的设计，但仍无人在此基础上，考虑上部结构。
Although currently we can design with considering nonlinear interaction of piled raft foundations, no one considers superstructure.
采用有限单元法对不同筏板刚度下桩筏基础下卧层附加应力的分布规律进行分析。
By finite element method, the distributions of additional stress of piled raft foundations in different raft rigidities are analyzed.
基于改进的分层地基模型，考虑桩—土—筏的共同作用，提出了刚性桩筏基础非线性分析方法。
Based on an improved layered foundation model, the interaction of piles-soil-raft is taken into account to formulate a nonlinear method for the analysis of piled raft foundations.
桩筏基础以筏板对角线与地铁隧道中心线重合的方式跨越地铁隧道对筏板的内力和变形影响最小。
The crossing method of raft diagonal which coincides with the center of metro tunnels has the least influence on the internal forces and the bending moment of the raft.
最后得出了CFG桩筏结构处理软土地基的桩土相互作用的相关规律，验证并丰富了当前CF G桩复合地基理论。
At last the law of reciprocity of the pile and soil of the soft soil ground treated by pile-raft structure are obtained, which validates and enriches current theory of the CFG pile composite ground.
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。
This paper discusses the effects of internal force and the settlement of plate on ground and counterforce on pile of main towers and podiums with settlement joints between them.
本文提出了控制桩筏基础差异沉降的主要措施，通过调整筏板刚度和桩基支承刚度的分布等措施达到减小差异沉降的目的。
The paper puts forward the main measures of controlling the differential settlement of piled raft foundation by increasing the rigid of raft and modifying foundation rigid.
大量桩筏基础下存在较厚的饱和软弱下卧层，其变形和内力的研究不仅涉及到筏板、桩和土三者之间的相互作用，而且还跟时间有很大的关系。
Research for the deformation and internal forces of piled raft foundation on a thick soft substratum are concerned with not only the interaction between pile, raft and soils but the also the time.
如果通过合理布桩可消除冲剪破坏，在给定配筋率的情况下，即可根据最大弯矩确定筏板的厚度。
If pile layout is reasonable to remove the possibility of punching failure , the thickness of piled raft can be simply determined under a certain reinforcement ratio.
本项研究提出了一种估计桩—筏基础筏底土所分担荷载的有效分析模型。
This paper presents an effective analytical model to estimate load capacity possessed by supporting soil for piled raft foundations.
对设计中的基础承载力的确定、筏桩复合受力分析、下卧软土、持力层应力扩展、桩基施工等方面进行了较为详细的研讨。
Detailed study was done in the determination of base bearing capacity, raft stake composite stress analysis, auger ground, bearing stratum stress stretching and pile foundation construction.
分析了大量现有的共同作用理论，分别整理了上部结构、筏板与桩土的分析模式。
The theories of interaction are summarized and analytical models of raft, pile-soil and superstructure are settled respectively.
该模型可以考虑变厚度筏板、厚筏、不规则筏板、异形基础及高层建筑主楼和裙楼的整体分析，同时计及地基和桩的水平约束作用。
The element is particularly suitable to analysis the raft with irregular thickness and shape, and the horizontal deformation of raft can also be considered if needed.
PDR法是计算沉降控制复合桩基的一种经验方法，它在一定程度上考虑了桩的非线性和桩—土—筏的共同作用。
Poulos-Davis-Randolph (PDR) Method is a empirical calculation method. It is easy to compute the relation between the number of piles and the average settlement of the foundation.
介绍某高速公路管理处考虑筏板-桩-地基共同作用的分析与计算方法，以供类似工程参考。
Introduced the method for analysis and calculation of coaction between raft foundation, piles and ground for an expressway office, it is useful for reference of the same project.
提出了由地下连续墙-桩-箱或筏所构成的复合基础的沉降计算方法，该方法定义为二阶段沉降计算方法。
A settlement computation method to the composite foundation composed of slurry wall-pile-box or thick raft is proposed, which is defined in the paper as two-stage settlement computation method.
软土地区，桩箱(筏)基础是高层尤其是超高层建筑的首选基础型式。
In soft soil area, we give priority to the piled box (raft) foundation in choosing the foundation type for super-tall building.
本文首次建立了一个分析桩-土-筏片体系共同作用的三维非线性有限元、棱柱元综合计算模型。
This model couples finite elements with prism elements and calculates with reasonable accuracy the settlement of a pile group, the bending moments and shear forces of the raft under vertical loads.
重力式挡土墙建立在桥台的下游护坡上，墙的基础由桩和筏板构成。
The retaining-wall foundation is built on the downstream bank slope of the bridge abutment, which stability cannot meet the requirement of specification.
筏板下的群桩假定为相互作用的非线性弹簧，使用双曲线函数拟合载荷试验的Q-S曲线，并用它来模拟桩在荷载下的非线性响应。
The single pile load test's Q-S curves can be matched by the hyperbola function. The non-linear characteristic of the piles can be modeled by the hyperbola function.
研究了工作荷载下不同布桩方式降低筏板差异沉降的效果。
The effect of different arrangements of piles to reduce differential settlements of raft was studied under working loads.
提出一种分析刚性桩复合地基—筏板基础相互作用体系内力和变形的实用方法。
A method is proposed for the settlement and inner force analysis of rigid pile composite foundation raft system.
分析结果基本反映了桩-土-筏的实际工作性状，验证了复合桩基理论的正确性。
Analysis results reflect the practical work properties of pile-soil interaction, and validate the correctness of composite pile foundation.
还分析了筏底土压力的分布机理 ，探讨了影响桩间土分担荷载作用的因素。
The distribution of the earth pressure under raft is studied and discussed. In addition, the characteristics of the tension pile under the podium of the tall building is analysed.
最后提出了桩-筏式复合地基处理软黄土地基方法及其设计与施工方法。
At last, design method as well as construction craft and quality control specification of the technology of reinforcing soft loess foundation under high embankment with pile-raft system is proposed.
最后提出了桩-筏式复合地基处理软黄土地基方法及其设计与施工方法。
At last, design method as well as construction craft and quality control specification of the technology of reinforcing soft loess foundation under high embankment with pile-raft system is proposed.
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