不同堆载方法在软基堆载预压中的稳定性分析

Stability Analysis of Preloading on Soft Foundation by Different Methods

结合上海某工程堆载预压方案对不同堆载方法稳定性进行了分析。基于“削坡减载”的思想,提出了梯形荷载堆载法,利用整体圆弧滑动法Bishop条分法对全面堆载法和梯形堆载法两种堆载方法形成的边坡进行了稳定性分析比较,得出了梯形法在稳定性和缩短工期方面都优于全面法的结论。

On the base of certain project using preloading method to settle its soft foundation in Shanghai, the stability of different loading methods is analyzed in this paper. Based on the 'cutting bulk & reducing load' theory, the echelon-shape loading method is introduced. The stabilities of echelon-shape loading method and full-scale loading method applied on soft foundation are analyzed and compared by Bishop's Circular Slide Method. The results show that the factor of safety of echelon-shape loading method is bigger than that of full-scale loading method. Applying preloading method with echelon-shape load in preloading on soft foundation can consumedly shorten the time limit for a project and increase its stability.