铁道科学与工程学报2017，Vol.14Issue(10)：2203-2213,11.
软岩隧道支护结构优化研究
Optimization of the soft rock tunnel support structure
摘要
Abstract
In order to control the deformation of soft rock and ensure construction safety, considering the large deformation of Youpangping Tunnel on Gu-zhu Highway, this paper proposed a new supporting scheme of weakening bolt and enhancing the initial support stiffness and strength. The comparative study was conducted between this scheme and other two supporting schemes, which contains both original scheme and weakening bolt support scheme. By means of the numerical simulation, the paper analyzed the displacement, the force of the bolt, the development situation of the plastic zone, shotcrete stress and secondary lining structure stress under the different supporting schemes. Meanwhile the rock displacement and stress of the three test sections were monitored under the three different supporting schemes. The numerical simulation results and the verify of monitoring show that weakening bolt has little effect on whole supporting system ,which can save the process and reduce the cost of the project during the construction. The enhancement of initial support stiffness and strength can effectively control the large deformation, which has significance to ensure the safety of the tunnel construction. It comes to conclusion that the supporting scheme of weakening bolt and enhancing the initial support stiffness and strength is feasible, and it provides a reference for the support optimization of similar tunnels.关键词
软岩隧道/数值模拟/支护优化/现场试验Key words
soft rock tunnel/numerical simulation/support optimization/field monitoring分类
交通工程引用本文复制引用
邓斌,饶和根,廖卫平,高诗明..软岩隧道支护结构优化研究[J].铁道科学与工程学报,2017,14(10):2203-2213,11.基金项目
江西省交通厅科技资助项目(2015C0067,2015C0015,2015C0016,2015C0020) （2015C0067,2015C0015,2015C0016,2015C0020）
