Support problems in deep excavations in the designing of multi-pivots piles are studied and applied on the basis of board and pile theory, and don t consider the process of excavation.

• 深基坑工程中的支护问题,在采用多支点排桩支护的设计中,目前的研究和应用以一般的板桩理论为基础,大多也是没有考虑开挖过程,支撑似乎在开挖前就存在,即不考虑支撑反力和结构的变形随开挖过程的变化。