桩筏基础分析方法与优化设计对策

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。对国内外有关桩筏基础设计方面的资料进行了分析,针对高层建筑常见的两种荷载形式,提出了在筏板中布置长桩,沿筏板边缘布置短桩的桩群布设方式。依据对桩筏基础设计参数的研究成果,给出桩筏基础优化步骤和算例的验证情况。

Analysis Method and Optimum Design Strategies for Piled Raft Foundation

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.The related research is summarized,and the piles configuration method,that the longer piles are used in the middle of raft while the shorter along the sides,is supposed based on the two usual kinds of loads in the highrise buildings.Based on the present results of the design factors to piled raft foundation,the optimum design steps are given and verified by an example.