水力发电学报2017，Vol.36Issue(4)：95-103,9.DOI:10.11660/slfdxb.20170411
峡谷地区高堆石坝面板结构性拉裂破坏机理及改善措施
Mechanism of structural tensile damage to concrete face slabs of high CFRDs in narrow valley regions and improvements
摘要
Abstract
A key issue in construction of high CFRDs in deep narrow valleys is the cracking of their concrete face slabs owing to local tensile stress.This paper presents an analysis on the mechanism of structural tensile damage that already occurred to the concrete face slabs of several existing high CFRDs and demonstrates the major cause of such damage at locations near river bank-sliding deformation of the rock-fills from river bank to river channel.A 3-D FEM analysis was used to compare the deformation in arch-shaped face slabs with that in widely used planar face slabs.The results show that the arched concrete face slabs can completely avoid this type of structural tensile damage without need to change the main stress or displacement properties of the dam.The arched shape of CFRDs is more favorable to the safety of dams that are built in deep narrow valley regions.关键词
峡谷地区/面板堆石坝/拱形面板堆石坝/面板结构性拉裂破坏/改善措施Key words
narrow valley region/CFRD/arched concrete face rock-fill dam/structural tensile damage of concrete face slab/improvements分类
建筑与水利引用本文复制引用
杨超,党发宁,薛海斌,高俊..峡谷地区高堆石坝面板结构性拉裂破坏机理及改善措施[J].水力发电学报,2017,36(4):95-103,9.基金项目
陕西省科技统筹创新工程重点实验室项目(2014SZS15-Z01) （2014SZS15-Z01）
水利部公益性行业科研专项基金资助项(201501034-04) （201501034-04）
