四川大学学报：工程科学版2012，Vol.44Issue(3)：42-46,62,6.
考虑整体力矩平衡的改进不平衡推力法
Improved Imbalanced Thrust Force Method （ITFM） Considering Overall Moment Equilibrium
摘要
Abstract
In order to improve the precision of conventional imbalanced thrust force method （ ITFM）, by introducing proportion coeffi- cient n, inter-slice force inclination was determined and equation set could be established to obtain the safety factor Fs, taking both force equilibrium and moment equilibrium into account. The reliability was finally verified by several examples. Researches showed that imbalaneed moment and safety factor vary near linearly when n changes. Derivation of safety factor of the method owns faster conver- gence speed than conventional ITFM, as well as better accuracy. Without horizontal seismic force, inter-slice force inclination is similar to the slip surface, hut inclination variation mainly occurs in few rear slices of the slope while taking significant seismic force into consideration. When n = 0, improved ITFM is equivalent to conventional ITFM, and consequently it could be regarded as an extension of the conventional one.关键词
边坡稳定/安全系数/整体力矩平衡/改进不平衡推力法/比例因子Key words
slope stability/safety factor/overall moment equilibrium/improved ITFM/proportion coefficient分类
建筑与水利引用本文复制引用
方薇,孙正兵,何晓敏..考虑整体力矩平衡的改进不平衡推力法[J].四川大学学报：工程科学版,2012,44(3):42-46,62,6.基金项目
国家自然科学基金资助项目 （）
铁道部科技研究开发计划项目 （）
