桩基础在我国具有悠久的历史,是建筑工程小广泛采用的一种深基础形式,也是处理软弱地基的一项有效方法。我们通过北京地区的试桩工作,发现钢筋混凝土预制桩单桩垂直承载力很高,但勘察单位提供的单桩设计承载力较低,而设计单位在设计中又降低使用。 The pile foundation has a long history in China. It is a deep-based form widely used in construction projects and is also an effective method to deal with soft foundations. Through the trial pile work in Beijing, we found that the vertical bearing capacity of single piles of reinforced concrete prefabricated piles was high, but the design bearing capacity of single piles provided by the surveying units was low, and the design units reduced their use in the design.