水中填土坝孔隙压力的计算模型、解析方法与参数选取

根据水中填土坝运用期坝体密度变化具有泡胀性的特点,以及对库水位降落期孔隙压力实测资料的分析,笔者认为水中填土坝在库水位降落期的孔隙压力计算应采用考虑骨架变形的比奥（Biot）固结理论模型。本文根据原型观测资料,对影响计算成果的三个主要力学指标:抗滑系数K,固结系数c_v和有效当量剪阻角（?）＇_s,推荐了经验公式。并提出了简化有效应力法--二维压密近似解。

Selection of Mathematical Model, Analytic Method and Parameter for Pore Pressure on the Earth Dams Built by Dumping Soils into Ponded Water

According as the density change in operation has a characteristic of expansion by steep lead, and as data analysis of pore pressure at drawdown on the earth dams built by dumping soils into the ponded water suggested as well, the author has proposed that one must adopt the consolidation model of Biot to calculate the pore pressure at drawdown on those dams because it has considered for the deformation of skeleton.According to data of prototype, the author has presented an empirical formula for estimating the coefficient of slide resistance K, the coefficient of consolidation cv and the angle of effective equivalent sliding resistance φ's respectively. They are the three chief mechanical parameters affecting the calculating results.In this paper a simple effective pressure method, i.e. an approach of two dimensional consolidation method has been put forward for consideration.