岩土工程学报2017，Vol.39Issue(11)：1949-1958,10.DOI:10.11779/CJGE201711001
特高面板砂砾石坝结构安全性论证
Evaluation of safety performance of extremely high slab-faced gravel dams
摘要
Abstract
The structural safety performance of Dashixia concrete face gravel dam (CFGD), an extremely high CFGD in Xinjiang, is studied based on the large-scale triaxial experiments on dam materials and the detailed finite element method-based numerical analyses. Compacted gravel materials are found to exhibit high deformation modulus, small magnitude of creep and small magnitude of shaking-induced residual deformation. The maximum settlement of Dashixia CFGD during operation is evaluated to be about 0.64% of the dam height, while the earthquake-induced permanent settlement at the crest is about 0.40%of the dam height. The maximum settlement and tension of the peripheral joints do not exceed the maximum measured ones in the investigated existing cases. The shear displacement, on the other hand, is larger than all the measured ones in these cases. However, the advancement in sealing structures and materials achieved in China can already satisfy the need of CFGDs as high as 250 m. Therefore, it can be concluded that the difficulty in deformation control is relatively less compared with that of rockfill dams with similar height. What deserves special attention, on the other hand, is the high static and dynamic stresses in concrete slabs, both along the axial and slope directions. The reinforcements near some peripheral joints and the compressive vertical joints are necessary.关键词
特高面板砂砾石坝/应力变形/结构安全Key words
extremely high slab-faced gravel dam/stress and deformation/structural safety分类
建筑与水利引用本文复制引用
陈生水,阎志坤,傅中志,李国英..特高面板砂砾石坝结构安全性论证[J].岩土工程学报,2017,39(11):1949-1958,10.基金项目
国家重点研发计划重点专项项目(2017YFC0404800) （2017YFC0404800）
国家自然科学基金项目(51379130,51539006) （51379130,51539006）
水利行业公益性专项经费项目(201501035) （201501035）
