• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (S2): 75-79.DOI: 10.3973/j.issn.2096-4498.2018.S2.011

• 研究与探索 • 上一篇    下一篇

高速铁路隧道二次衬砌钢筋施工预留沉落量分析

赵宏博1, 杨成文2, *   

  1. (1. 武九客专湖北公司兴山建设指挥部, 湖北 宜昌 443000; 2. 中铁五局集团有限公司郑万湖北项目部, 湖北 恩施 444303)
  • 收稿日期:2018-04-25 修回日期:2018-08-10 出版日期:2018-12-30 发布日期:2019-01-30
  • 作者简介:赵宏博(1980—),男,陕西宝鸡人,2011年毕业于石家庄铁道学院,工程管理专业,本科,工程师,现从事铁路工程建设管理及隧道与地下工程研究工作。 Email: 185577116@qq.com。 *通信作者: 杨成文, Email: 495590254@qq.com。

Analysis of Reserved Sedimentation for Construction ofSecondary Lining Reinforced Steel in Highspeed Railway Tunnel

ZHAO Hongbo1, YANG Chengwe2, *   

  1. (1. Xingshan Headquarters of WuhanJiujiang Passengerdedicated Line Hubei Co., Ltd., Yichang 443000, Hubei, China; 2. Hubei Department of ZhengzhouWanzhou Highspeed Railway of China Railway No. 5 Engineering Group Co., Ltd., Enshi 444303, Hubei, China)
  • Received:2018-04-25 Revised:2018-08-10 Online:2018-12-30 Published:2019-01-30

摘要:

为提高铁路双线大断面隧道二次衬砌钢筋保护层控制质量,降低拱顶开裂风险,针对隧道二次衬砌钢筋在大跨度时本身具有向下的沉落变形特点,需对钢筋沉落量进行有效控制。二次衬砌环向主筋受力体系与拱的受力方式相同,以郑万高速铁路隧道二次衬砌结构几何参数、钢筋及垫块布置、钢筋的自重为研究对象,按无铰拱结构受力计算方式,采用经典力学原理、拱的挠度理论、挠度叠加设立方程,对钢筋自重下的预留沉落量进行研究,得到环向主筋越小施工沉落量越大,环向主筋越大施工沉落量越小的规律。通过理论公式计算出各种衬砌类型钢筋施工沉落量,提前进行有效预设,并按施工沉落变形对钢筋进行有效限位支撑,提高钢筋安装的准确性,有效控制了二次衬砌钢筋保护层,满足了设计要求。

关键词: 郑万高速铁路, 双线隧道, 二次衬砌钢筋, 圆弧无铰拱, 钢筋施工沉落量

Abstract:

In order to improve the control quality and reduce the crack risk of the secondary lining reinforced steel of doubleline large crosssection tunnel layer, the amount of sedimentation of reinforced steel is controlled according to deformation characteristics of the secondary lining reinforced steel with large span. The bearing force system of the circumferential reinforcement coincides with that of arch. The geometric parameters, arrangement of reinforced steel and cushion block and selfweight of reinforced steel are studied; the reserved sedimentation of secondary lining reinforced steel under selfweight is studied by classical mechanical theory, deflection theory of arch and the setting equation of deflection superposition under stress calculation of nonhinged arch; and it is obtained that the smaller the circumferential reinforcement, the larger the construction sedimentation, and the larger the circumferential reinforcement, the smaller the construction sedimentation. By calculating the amount of construction sedimentation of each lining reinforced steel by theoretical formula, effective presetting in advance and effective positionlimit supporting for the reinforced steel, the accuracy of the reinforced steel installation is improved, and the secondary lining reinforced steel protection layer is control.

Key words: ZhengzhouWanzhou Highspeed Railway, doubleline tunnel, secondary lining reinforced steel, circular arc nonhinged arch, construction sedimentation of reinforced steel

中图分类号: