| 连拱隧道先行洞室支护体系施工力学性态研究 |
| |
| 引用本文： | 马永峰,张志豪,贾贵智,曹力桥.连拱隧道先行洞室支护体系施工力学性态研究[J].现代隧道技术,2011,48(1). |
| |
| 作者姓名： | 马永峰 张志豪 贾贵智 曹力桥 |
| |
| 作者单位： | 1. 中石油华东勘察设计研究院,青岛,266071
2. 中铁第四勘察设计院集团有限公司,武汉,430063 |
| |
| 摘 要： | 结合连拱隧道工程实践,对隧道施工中先行洞室支护体系应力进行相关监测,分析不同开挖工序下应力变化规律。研究结果表明:先行洞室上台阶及仰拱开挖引起了支护应力较大变化及重分布,为支护稳定的控制点;隧道开挖对支护应力的纵向影响距离大致为隧道跨度的2倍,约为20～25 m;开挖效应消失后,左右拱圈45°处应力的时间效应较其它位置要明显;封闭支护结构是改善结构受力的有效途径,应及时施作仰拱和形成封闭环。该研究结论可为类似条件下连拱隧道设计施工和现场监测提供借鉴与参考。
|
| 关 键 词： | 连拱隧道 支护体系 现场监测 力学性态 |
Study on Construction Performance of Support Systems in Headings of a Double-arch Tunnel |
| |
| Ma Yongfeng,Zhang Zhihao,Jia Guizhi,Cao Liqiao.Study on Construction Performance of Support Systems in Headings of a Double-arch Tunnel[J].Modern Tunnelling Technology,2011,48(1). |
| |
| Authors: | Ma Yongfeng Zhang Zhihao Jia Guizhi Cao Liqiao |
| |
| Institution: | Ma Yongfeng1 Zhang Zhihao1 Jia Guizhi1 Cao Liqiao2(1 East China Design Institute of CNPC,Qingdao 266071,2 China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063) |
| |
| Abstract: | With a double-arch tunnel project as the background,stress monitoring of the support system was carried out and the stress variation during different excavation stages was analyzed in detail with some conclusions drawn.Since the excavation of upper-bench and invert of the headings caused great changes in support stresses,they were the main stages to control the support stability.The longitudinal influence of tunnel excavation was 20 to 25 m,about two times of the excavation span.After the excavation effect ... |
| |
| Keywords: | Double-arch tunnel Support system In-situ monitoring Performance |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
