增量法在深基坑围护结构水平变形计算中的应用

Application of Incremental Method in Deep Excavation Enclosure Structure Horizontal Displacement Calculation

在结构和荷载变化复杂的大型基坑工程围护结构变形计算中,增量法计算相对其他计算理论具有较明显优越性.采用增量法对上海世博500kV地下变电站其基坑围护结构在开挖过程中的水平位移进行了计算整理,并与实测值进行对比分析.结果显示两者能较好地拟合,表明应用增量法在此类工程中进行变形计算有一定的适用性.

The calculation principle and loads classifying process of incremental method are introduced. It is obviously superior to other theories concerning the deep excavation enclosure deformation calculation when the structure and its loads change in a complex manner. The analysis on deep excavation enclosure displacement of the Shanghai 500 kV World Expo underground transmission and substation is conducted on the basis of the incremental method. Through the comparison between monitored and computed data, the helpful reference to calculating horizontal deformation on similar projects is provided.