水泥土围护结构抗倾覆稳定验算方法的改进  

Improved Method to Calculate Anti-Overturn Safety Factor of Cement-Soil Retaining Wall

作　　者：李卫超[1] 熊巨华[1] 周明琪[1] 杨敏[1] 

机构地区：[1]同济大学地下建筑与工程系,岩土及地下工程教育部重点实验室,上海200092

出　　处：《结构工程师》2010年第1期87-90,共4页Structural Engineers

基　　金：国家科技支撑计划(2008BAJ06B04-1)

摘　　要：现行水泥土围护结构抗倾覆稳定验算中存在抗倾覆稳定系数随着墙体入土深度的增加而减小的不合理现象,假设转动点位置在墙趾处而进行抗倾覆稳定验算,是导致不合理现象的主要原因。据此,假设转动点在墙体埋深范围内变化,计算各点相对应的抗倾覆稳定系数,并定义其最小值为该围护结构实际的抗倾覆稳定系数。采用Fortran语言编制计算机程序进行的计算表明,抗倾覆稳定系数随入土深度的增加而增加。还讨论了影响抗倾覆稳定系数的影响因素。The current calculating method of anti-overturn safety factor of the cement-soil retaining wall would lead to an unreasonable phenomenon that the anti-overturn safety factor reduces with the increasing of the embedded depth of the wall. The main reason could be the assumption that the location of the turning point is in the position of the wall toe. The real anti-overturning safety factor of a retaining wall is defined as the minimum one among those anti-overturning safety factors which are calculated by an assumption that the turning point changes in the framework of the embedded wall depth. By means of Fortran programming, the results indicate that the deeper of the embedded depth of cement-soil retaining wall, the bigger of the anti- overturn safety factor. Some influence factors of the anti-overturn safety factor are also discussed.

关 键 词：水泥土 围护结构 抗倾覆稳定验算 转动点位置 

分 类 号：TU311.4[建筑科学—结构工程]