桩筏基础设计方法的改进及其经济价值

Improvement of design method for pile raft foundation and its economical significance

以最大限度挖掘地基基础潜力为目标，从降低结构次内力、减小筏板厚度、减少桩数的角度，系统论证了外疏内密布桩法的优越性及其巨大的经济价值。

The advantage of a new method for pile raft foundation design——Sparse Outside Dense Inside(SODI) and its tremendous economic value are systematically discussed in this paper.With this new method,almost all of the internal secondary forces of super structure can be eliminated,the internal force of raft cut down to the minimum,numbers of piles reduced,and length or diameter of piles decreased.In this way,cost of foundation is lowered and funds for construction is saved.