龙潭湾大跨径隧道断面形状优化设计研究
On Optimized Cross Section Design of the Longtanwan Highway Tunnel with a Large Span
余世根 1刘文玉 1沈刚 1张立富 1易毅2
作者信息
- 1. 十堰市城区东环一级公路项目经理部,十堰442000
- 2. 中国地质大学,武汉430074
- 折叠
摘要
目前三车道隧道断面形状设计没有统一的标准,合理的断面形状设计既可节约成本,又可保证隧道的安全性.文章以龙潭湾隧道为工程背景,利用ANSYS有限元软件对不同扁平率的断面隧道开挖后的应力分布、位移分布、衬砌受力等进行了数值模拟分析;运用层次分析法对影响隧道安全性与经济性的最大正应力、拱顶下沉、开挖面积、衬砌周长等日标值进行了多目标优化,提出了依托工程条件下的最优化断面形状.
Abstract
At present there is no uniform standard for the section design of a three-lane tunnel; a reasonable section shape design could save cost and ensure the safety of the tunnel. Based on the Longtanwan tunnel, a numerical simulation of the sections using various aspect ratios in the aspects of stress distribution, displacement distribution, and forces applied on the lining after tunnel excavation was performed with ANSYS finite element software. The multi-objective optimization of such desired values as maximum normal stress, crown settlement, excavation area, and lining perimeter was taken by the analytic hierarchy method. This paper presents the optimized section shape regarding the Longtanwan tunnel.
关键词
隧道断面/数值模拟/层次分析法/扁平率/断面优化Key words
Tunnel section/Numerical simulation/Analytic hierarchy process (AHP)/Aspect ratio/Section optimization引用本文复制引用
基金项目
中央高校基本科研业务费专项资金科研项目(CUGL110215)
出版年
2012
NETL
NSTL
维普
万方数据