混合坝型衔接坝段协调变形离心模型试验与数值分析

Centrifugal and numerical analysis on the compatible deformation of the jointing blocks of a composite dam

通过离心模型试验和数值分析,模拟了某均质坝和斜墙分区坝混合坝的变形.结果表明,填筑施工期大坝坝体沉降已基本完成,蓄水对坝体沉降的影响较小.因筑坝材料、坝基岩土特性及坝体高度等因素的影响,不同坝型间存在差异沉降,但填筑施工期已基本完成差异沉降,蓄水运行期的差异沉降增量很小,沿坝顶纵向的整体协调性较好,坝体在填筑期、蓄水期及运行期的整体稳定性也较好.

The deformation of a composite dam is studied by means of centrifugal model test and numerical method. Most of the settlement is completed during the construction, and the impoundment has little effects on the settlement. Differential settlement is observed between different sections of the dam, which is mostly completed during the construction and is affected by the impoundment very slightly. The overall stability of different sections of the dam is very high during construction, impoundment and operation.