复杂巨厚覆盖层高闸坝基础变形控制研究

Research on Deformation Control of Gate Dam Foundation With Complex and Thick Overburden

变形控制是复杂巨厚覆盖层上高闸坝建设的重要难题。为此,以深厚覆盖层上多布水电站闸坝工程为例,系统介绍了深厚复杂覆盖层上闸坝基础变形控制措施,提出了可反映深厚覆盖层超固结特性的弹塑性模型及大规模桩群简化模拟方法,实现了深厚覆盖层闸坝工程的三维整体模拟,并通过三维数值模型结果与现场监测结果比较验证了多布水电站地基加固措施的有效性和必要性。

Deformation control is an important problem in the construction of a high gate dam on a complex thick overburden.Taking the Duobu hydropower station as an example,this article introduced the settlement control method of gate dam foundation on the complex thick overburden.An elastoplastic model that can reflect the over-consolidation characteristics of deep overburden layers,and a simplified method for simulating large-scale pile groups were proposed.Therefore,the three dimensional overall simulation of the gate dam on deep overburden was realized.The validity of the numerical model was verified.The effectiveness and necessity of foundation reinforcement measures was verified by comparing the in-situ measured values with three-dimensional model.