长江科学院院报2011，Vol.28Issue(10)：180-185,6.
穿黄隧洞预应力双层复合衬砌结构受力特性研究
Mechanical Behavior of Prestressed Double Composite Linings of Yellow-River-Crossing Tunnel
摘要
Abstract
The mechanical behavior of double composite linings of the Yellow-River-Crossing tunnel is analyzed by using 3-D non-linear finite element method when contacts between assembled segments of outer linings, and contacts between the inner and outer linings are considered. The above numerical calculation is compared with the 1: 1 simulation test of two models with and without cushions between the inner and outer linings. The test process, inclusive of the segments assembling, layered earth filling, pretensioning of inner linings, and the applying of water pressure, is fully simulated. In the model without cushions, despite the fully-opened gap between the inner and outer linings, pretension loads upon the inner linings are partly transferred to the outer linings through steel bars, which is proved to be critical for joint load-bearing of the double linings; whereas in the model with cushions, stresses of the outer linings increase slightly under the pretension and water pressure loads, revealing that the inner linings are subjected independently to these loads. The numerical values are close to test values in terms of the distortion, the stresses, and the gap between the inner and outer linings.关键词
南水北调/穿黄隧洞/双层复合衬砌结构/三维有限元/接触非线性Key words
South-to-North Water Diversion Project/ Yellow-River-Crossing tunnel/ double composite lining/ 3-D finite element/ contact nonlinearity分类
建筑与水利引用本文复制引用
谢小玲,苏海东..穿黄隧洞预应力双层复合衬砌结构受力特性研究[J].长江科学院院报,2011,28(10):180-185,6.基金项目
“十一五”国家科技支撑计划项目(2006BAB04A11) （2006BAB04A11）
