水坠坝施工期脱水固结计算

Calculation of Consolidation during Construction of Sluicing-Siltation Dams

本文根据水坠坝实际情况采用了土水势概念,提出了考虑非饱和边埂土吸水影响的脱水固结数学模型.对饱和土采用反映大变形特性的等应变固结试验测定参数,非饱和土用水平土柱法测定扩散系数,并由压力薄膜仪测得容水度后求渗透系数,用隐式差分法求解控制方程,所得结果与实际工程观测结果较为吻合.

For the case of sluicing-siltation dams, this paper presents a mathematical model of consolidation considering the suction effect of unsaturated soil at the edge of the dam. For the determination of parameters, CRS is used to determine the parameter of saturated soil with large strain, the horizontal soil column method is used to determine the diffusivity of unsaturated soil, and the coefficient of primeability can be obtained after water capacity is determined with the pressure mambrane method. The solution to the controlling equation found with the implicit finite difference method is in agrieement with observed data.