Abstract: Through the survey of 20 engineering projects of corrupted joint of shaft and shaft bottom, we found some problems such as the lack of geological conditions、unreasonable structure、design flaws、non-standard constructions exist in the process of design and construction. This paper summarized the engineering project’s damage form, and analyzed the damage characteristics, discussed the reasons of damage from the geological conditions、structure、design、and construction, the analysis showed that most of the damage of joint of shaft and shaft bottom can be prevented and avoided.

Key words: joint of shaft and shaft bottom, damage characteristics, geological conditions, structure , design, construction