考虑超孔压随深度变化一维固结计算式的推导  

Derivation of One-dimensional Consolidation Formula Considering Changes of Excess Pore Pressure along Vertical Profile

作　　者：张松岩[1] 吉晓朋[2] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]中航勘察设计研究院有限公司,北京100098

出　　处：《路基工程》2011年第2期102-104,共3页Subgrade Engineering

摘　　要：对于含有深厚粘土的饱和地基,路基荷载引起的压缩层中的附加应力近似呈折线形衰减。为了进一步提高固结计算精度,以太沙基一维固结理论为基础,推导出了初始超孔压随深度变化为折线形的孔隙水压力计算式,并讨论了计算式的收敛速度,在保证精度的基础上适当进行一定的简化,得出了整个压缩层的平均固结度计算式。For saturated foundation with deep clay,additional stress along compression layer caused by subgrade load approximately decays in irregular curve.In order to further improve the accuracy of consolidation calculation,based on Terzaghi theory of one-dimensional consolidation,pore pressure formula in which the nonlinear change of initial excess pore pressure along vertical profile is taken into account,is derived in this paper.The convergence rate of the formula is discussed.Through certain simplification on the basis of ensuring accuracy,an equation of average consolidation degree of the whole compression layer is obtained.

关 键 词：路基 一维固结 初始超孔压 平均固结度 计算式 

分 类 号：TU441.8[建筑科学—岩土工程]