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通过上海饱和软粘土中３５座桩基实测沉降资料对比，表明在工程条件十分接近的条件下钻孔桩基的沉降小于打入桩基，显示成桩工艺对桩基沉降的影响。并根据打桩引起的桩负摩阻力概念对两类桩基沉降差异的机制作了分析。
The comparison of measured settlement data of 35 pile foundations in Shanghai saturated soft clay shows that the settlement of bored pile foundation is less than that of driven pile foundation under the condition that the engineering conditions are very close to each other, indicating the effect of pile forming process on the settlement of pile foundation. According to the concept of pile negative friction caused by pile driving, the mechanism of settlement difference between the two types of pile foundation was analyzed.