高层建筑厚筏反力及变形特征试验研究

Experimental study on contact pressure and deformation of thick raft foundation under tall buildings

根据大型模型试验证明 ,高层框架及厚筏的刚度近似于箱型基础 ,当筏板厚度超过 1/ 6柱跨时 ,用倒梁法计算与整体分析法效果相近。利用局部荷载作用下计算筏板反力和沉降的方法按叠加原理 。

The large scale model test proves that the rigidity of frame structure with large thick raft foundation is approximately equal to the rigidity of box foundation.When the ratio of the thickness of raft and the span of the column is bigger than 1/6,the results calculated by inverted beam method agree with that by global analysis method.Using the computation method of contact pressure and settlement acted by the local load,and then adopting the superposition principle,the settlement of the large thick raft foundation under several tall building can be obtained.