Treatment schemes for bedrock deep grooves in high arch dam

被引：0
|
作者：
Lü Z. [1 ]
Liu Y. [1 ]
Cheng L. [2 ]
Yang Q. [1 ]
机构：
[1] State Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing
[2] China Renewable Energy Engineering Institute, Beijing
来源：
Qinghua Daxue Xuebao/Journal of Tsinghua University | 2019年 / 59卷 / 05期
关键词：
Deep excavation; Foundation backfilling; Global stability; High arch dams; Unbalanced forces;
D O I：
10.16511/j.cnki.qhdxxb.2019.21.008
中图分类号：
学科分类号：
摘要：
The riverbed bedrock of a 300-m-high arch dam has a deep groove so the arch dam design must choose between filling this groove with concrete or excavating to the bottom of the groove. 3-D finite element models were developed for the concrete backfilling scheme and the deep excavation scheme. Deformation reinforcement theory (DRT) was then used to analyze the dam displacement, stresses and plastic zone extensions for both normal and overloaded conditions. The global stabilities of both schemes were evaluated based on the unbalanced force and the plastic complementary energy. The results show that both design schemes meet the requirements for the overloading capacity and global stability with the concrete backfilling scheme somewhat better than the deep excavation scheme in terms of the displacement, stresses and global stability of the arch dam. © 2019, Tsinghua University Press. All right reserved.
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页码：373 / 379
页数：6
相关论文
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