桩筏基础中筏板厚度的确定

Determining for Raft-slab's Thickness in Pile-raft Foundation

桩筏基础中筏板厚度的确定需同时考虑承载能力极限状态和正常使用极限状态的相关要求;设计操作中应利用变刚度调平的原则进行桩位布置,通过试算结果来调整桩位布置从而取得筏板基础的合理厚度。并运用一框架剪力墙结构基础算例来说明筏板厚度试算确定法的适用性。

The determination of the raft-slab＇s thickness must consider the maximum load-bearing capacity as well as the related requirements under the normal operation limits; so in the design stage, the principle of stiffness change should be employed in the pile-position arrangements, through the calculation results, the pile position could be rearranged, and in this way, the rational thickness of the pile-raft base is obtained. A calculation case of framed shearing wall basis is used to illustrate the application of the determining method for the raft-slab＇ s thickness.