DX桩由于承力盘的存在，改变了桩的荷载传递机理，在提高承载力的同时，沉降变形也显著减小。在桩的现场试验基础上，分析了DX桩与等截面桩的桩顶荷载的分配特性，进而依据Mindlin解和Geddes解求解桩端土的附加应力，编制了相应的程序，计算结果表明在同样的荷载条件下，DX桩的沉降是等截面桩的0.55~0.80倍，并对承力盘的变化引起的DX桩的沉降变化进行了分析。

As the existence of load-carrying plate DX pile changes the load transfer mechanism of piles, improves capacity and also significantly reduces the settlement deformation. In this paper, on the basis of field trials, the distribution characteristics of load of DX piles and equal diameter piles are analyzed, and thus according to Geddes solution the soil pile superimposed stress is solved by using a program developed by authors. The results show that in the same load conditions, the settlement of DX pile is 0.55 to 0.80 times as compared with equal diameter pile. The changes of the settlement caused by load-carrying plate are analyzed.