岩土力学2012，Vol.33Issue(6)：1711-1718,1723,9.
山区高填方地基蠕变沉降特性及简化计算方法探讨
Characteristics and simplified calculation method of creep settlement of high fill foundation in mountain area
摘要
Abstract
It is an important topic to predict the settlement, especially post construction settlement, of high fill foundations, which is encountered more and more often in the mountainous areas in western China. However, both the calculation model and calculation method are to be studied further. The characteristics, application scope and parameter values of the hyperbolic model are discussed first; and then the creep mechanism of rockfills is also discussed in depth, especially the reason that creep under laboratory test conditions always finishes in a shorter period than that under filled conditions is explained. After that, a simplified calculation method is proposed to calculate the creep deformation for high fill foundation with uniform thickness in a large area, in which load variations during creep can be properly considered. The rationality and feasibility of the proposed method is demonstrated through numerical comparisons. Besides, by analyzing the results of laboratory tests, the significant relationship between dry-wet cycle deformation and cycle numbers is found, on the basis of which a simplified coupling calculation method that can simultaneously compute the creep deformation and dry-wet cycle deformation is also proposed. Finally, the post construction settlement of a practical engineering project is predicted by the proposed method.关键词
高填方/碎石料/蠕变/干湿循环/简化计算方法Key words
high fill/ rockfills/ creep/ dry-wet cycle/ simplified calculation method分类
建筑与水利引用本文复制引用
宋二祥,曹光栩..山区高填方地基蠕变沉降特性及简化计算方法探讨[J].岩土力学,2012,33(6):1711-1718,1723,9.基金项目
国家高技术研究发展计划(863计划)资助项目(No.2007AA11Z113) （863计划）
国家自然科学基金项目(No.50978140). （No.50978140）
