蓄水后土石坝应力变形有效应力算法  

Effective stress method of stress and deformation for soil-rock fill dam after water impounding

作　　者：卢廷浩[1] 高贵全[2] 陈剑[1] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098 [2]云南农业大学水利水电与建筑学院,云南昆明650201

出　　处：《岩土力学》2005年第2期247-250,共4页Rock and Soil Mechanics

摘　　要：水库蓄水后,土石坝应力变形较之施工填筑阶段更为复杂,其计算方法可分为总应力算法和有效应力算法。总应力算法简便直观,将心墙作为一个大单元仅宏观上符合总应力加面力的组合,而在微观上对于心墙具体单元而言却不符合;有效应力算法是采用有效应力加渗流力的组合,再考虑浸润线以下坝壳和心墙每个单元受到的浮托力及湿化变形引起的等效结点力(等效荷载),因此,不论是在宏观上,还是微观上,有效应力算法将更趋于合理,没有总应力算法所存在的缺陷。After water impounding, stress and deformation of the soil-rock fill dam become more complicated than that in the construction period. The calculating methods mainly contain total stress method and effective stress method. Total stress method is more simplified and it is reasonable with the macroscopic viewpoint in taking account of total stress and surface force as a big element for core wall, but it is unreasonable for every element of core wall with the microscopic viewpoint. Effective stress method takes account of effective stress and seepage force, in addition, uplift force and equivalent force to the damping deformation of the dam shell and core wall for every element of dam under the saturation line is considered, so that effective stress method is more reasonable not only with the macroscopic viewpoint but with the microscopic viewpoint.

关 键 词：土石坝 蓄水 应力变形 有效应力 算法 

分 类 号：TV64[水利工程—水利水电工程]