水利水电技术2017，Vol.48Issue(2)：37-44,8.DOI:10.13928/j.cnki.wrahe.2017.02.007
300 m级超高斜心墙和直心墙堆石坝应力变形分析
Stress-deformation analysis on 300m-level super high rockfill dams with inclined and vertical cores
黄华东 1郭张军 2韩耀铭 3杨文曦3
作者信息
- 1. 南京南瑞集团公司,江苏南京211106
- 2. 国网陕西省电力公司电力科学研究院,陕西西安710054
- 3. 安康水力发电厂,陕西安康725000
- 折叠
摘要
Abstract
For optimal design and safety assessment,a 3-D stress-deformation finite element calculation is made on a 300 m-level super high rockfill dam with vertical core and its alternative scheme——a rockfill dam with inchned core.For which Duncan Chang E-B nonlinear elastic model is adopted for the rock-filling materials for the dam,while Goodman element model is applied to the interface between highly plastic clay and concrete structures,and then the dam construction and the reservoir impoundment processes are simulated under the load which is divided into 43 levels for comparing and analyzing the stresses and deformation behaviors of the dam bodies and the cores of both the dam types during the impoundment period.The result shows that if compared with the scheme of the dam with vertical core,the maximum horizontal displacement of dam body obtained from the calculation for the scheme of the dam with inclined core is relatively smaller and the vertical settlement is larger.Under the scheme of the dam with inclined core,the horizontal areas of high stress at the dam abutments of both the banks of the core are reduced in some extent,which can improve the stress and deformation conditions of the elements at the upstream face of the core.Moreover,the arch effect of the core is relatively weaker under the scheme of the dam with inclined core,while its performance for resisting hydraulic fracture relatively better.关键词
堆石坝/斜心墙/直心墙/三维有限元/应力变形Key words
rockfill dam/inclined core/vevtical core/3-D finite element/stress-deformation分类
建筑与水利引用本文复制引用
黄华东,郭张军,韩耀铭,杨文曦..300 m级超高斜心墙和直心墙堆石坝应力变形分析[J].水利水电技术,2017,48(2):37-44,8.
