高趾墙面板堆石坝在沙坝水库扩建加高中的应用研究

Study of Applying High-toe Wall Panel Rock-fill Dam in Shaba Reservoir Expansion and Heightening

沙坝水库扩建加高工程针对坝址地形地质条件和已成坝体结构、施工期对已成坝体安全影响、降低水库水位对县城供水影响,采用了混凝土面板堆石坝加高的设计方案,解决了两坝肩山体单薄、坝基地质条件较差等问题。通过三维有限元对大坝应力应变、面板内力、渗流特征以及高趾墙稳定性进行计算分析,论证了大坝采用在原浆砌石重力坝基础上进行混凝土面板堆石坝加高方案的可靠性。

The Sandbank Reservoir extension and heightening project, aiming for the influence of dam site geological conditions, constructed dam structure, and construction period on dam body safety, and influence of lowering water level on downtown water supply, adopts the design scheme of heightening the concrete faced rockfill dam to solve the problems of weak dam shoulder mountain, and bad basement geological conditions. This paper demonstrates the reliability of concrete faced rockfill dam heightening scheme conducted on the basis of magma masonry gravity dam by computation and analysis of three-dimensional finite element on dam stress-strain, panel internal force, percolation characteristics and high-toe wall stability.