介绍了该建筑物所处场地地质条件及其原结构特征、原基础设计情况 ,表述了该桩基施工时所出现的事故现象 ,重点分析了产生此次桩基事故的原因。 The geological conditions of the site where the building is located, the original structural features and the original design of the foundation are introduced. The accidents that occur during the construction of the pile foundation are described, and the reasons for the pile foundation accident are analyzed.