筏板基础的优化设计

Optimum design of raft foundation

筏板基础具有整体性好、承载力高、结构布置灵活等优点,广泛用作高层建筑及超高层建筑的基础[1]。通过对实际工程的处理,主要针对以下几个方面进行分析:(1)筏板基础在柱作用下的抗冲切问题和在核心筒下的抗剪、抗冲切问题;(2)筏板基础在进行地基承载力验算时基底是否可以考虑地下水浮力的影响;(3)带裙房的高层建筑筏板基础埋深d的确定;(4)筏板基础差异沉降的简化计算。最后,得出几点关于筏板基础优化设计的方法,可供结构设计时参考。

Raft foundation which have comprehensive,high-capacity,flexible arrangements such as the structure of the advantages are widely used as a foundation of high-rise buildings and super tall buildings.Based on actual projects to deal with,mainly for the following analysis：（1）raft foundation in the column under the anti-punching and in the following core tube shear,the issue of anti-punching;（2） whether or not to consider the impact of groundwater buoyancy when checking raft foundation in-bearing capacity of the basement;（3） to determination the raft depth of high-rise building which has the podium;（4）to simplify the calculation of differential settlement about raft foundation.Some come to the last raft of ways to optimize the design,structure design for reference.