铁道标准设计Issue(11)：121-124,129,5.DOI:10.13238/j.issn.1004-2954.2014.11.028
能量守恒原理在吁级围岩隧道衬砌设计中的应用研究
Research on the Application of Energy Conservative Principal in Lining Design of Tunnel with V-class Surrounding Rock
摘要
Abstract
There exists energy delivery and transformation in the closed surrounding rock - tunnel lining system during the process of tunnel construction. When thermal energy transformation is left out of consideration and the surrounding rock is treated as an elastic body, the release of static energy of surrounding rock equals the increase in the elastic strain energy of tunnel lining. According to this energy conservative principle, Liu Hongyan and other researchers[1 2] calculated the thickness of lining of single track tunnel subject to Ⅲ-class surrounding rock. Based on these research findings, this paper further studies the application of energy conservative principle in V-class tunnel lining design. V-class surrounding rock of the three-dimensional FLAC3D model is established, dynamically simulating the process of tunnel excavation. With MATLAB language to the program of elastic strain energy density function, elastic strain energy of each unit of solid model is obtained, thus, static energy curves of surrounding rock associated with excavation depth within the specific scope of monitoring surrounding rock are finally obtained. According to the above curves, we are able to obtain the release value of static energy of surrounding rock. Additionally, toughness tests of steel fiber reinforced concrete ( SFRC) members are conducted, which leads to the finding of the relationship between energy expenditure of SFRC trisection beam under critical conditions and that of SFRC tunnel lining. Thus, theoretical tunnel lining thickness can be defined by solving the energy equation deduced from the energy expenditure relationship, and proved to satisfy the safety requirements. The research results show that, the tunnel lining design method with energy conservative principles is no longer limited by the conditions of II,Ⅲ-class surrounding rock in small section tunnels, and it is also applicable to the lining design of large section tunnels with Ⅴ-class surrounding rock.关键词
隧道衬砌/能量守恒原理/弹性应变能密度/数值分析/钢纤维混凝土 (SFRC)Key words
Tunnel lining/Energy conservative principle/Elastic strain energy density/Numerical analysis/Steel fiber reinforced concrete (SFRC)分类
交通工程引用本文复制引用
胡磊,王志杰,许瑞宁,马安震,何晟亚..能量守恒原理在吁级围岩隧道衬砌设计中的应用研究[J].铁道标准设计,2014,(11):121-124,129,5.基金项目
中央高校基本科研业务费专题项目(SWJTU11ZT33) （SWJTU11ZT33）
