The time effect of the bearing load of columnfoundation is that the bearing load increases with the lapse of time.
桩基础承载力随着时间推移呈逐渐增大的趋势，这就是桩基承载力的时间效应。
2
This paper introduces the construction program and practicing method of the foundation underpinning and columnfoundation jacking restoration.
本文介绍了采用基础托换与柱基顶升复位施工的程序和做法。
3
The causation for columnfoundation settlement of factory building is analysed in this paper' Therefore, the scheme of reinforcing foundation with chemical churning pile has been put up.