• 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 (2): 161-170.DOI: 10.3973/j.issn.2096-4498.2018.02.002

• 研究与探索 • 上一篇    下一篇

初期支护组合形式有效性现场试验研究

申志军1, 黄海昀2,*, 李思2, 李冰天2, 仇文革2   

  1. (1. 蒙西华中铁路股份有限公司, 北京 100073; 2. 西南交通大学交通隧道工程教育部重点实验室, 四川 成都 610031)
  • 收稿日期:2017-06-20 修回日期:2017-10-20 出版日期:2018-02-20 发布日期:2018-03-19
  • 作者简介:申志军(1971—),男,1996年毕业于西南交通大学,地下工程与隧道工程专业,硕士,教授级高级工程师,主要从事铁路工程建设管理和科研工作。Email: 71724488@qq.com。*通信作者: 黄海昀, Email: haiyun.hhuang@outlook.com。
  • 基金资助:

    蒙西华中铁路股份有限公司资助项目(MHHTZX(2016)0002、TKKY201601002); 国家自然科学基金资助项目(U1434206、51678497)

Study of Field Test on Effectiveness of Composition  Mode of Primary Support

SHEN Zhijun1, HUANG Haiyun2, *, LI Si2, LI Bingtian2, QIU Wenge2   

  1. (1. MengxiHuazhong Railway Co., Ltd., Beijing 100073, China; 2. Key Laboratory of Tunnel Engineering, Ministry  of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
  • Received:2017-06-20 Revised:2017-10-20 Online:2018-02-20 Published:2018-03-19

摘要:

初期支护组合形式的有效性一直存在较多争议。依托蒙华铁路在建隧道,针对初期支护不同组合形式有效性问题开展大量现场试验,量测内容包括拱顶沉降、水平收敛、系统锚杆轴力、喷射混凝土应力及钢架应力。通过对花岗岩、板岩、砂泥岩、黄土4种地层进行试验,分析具有代表性的Ⅲ、Ⅳ、Ⅴ级花岗岩和Ⅴ级黄土试验段数据,研究深埋岩质和土质隧道初期支护中钢筋网喷射混凝土、钢架及系统锚杆不同组合形式的有效性。结果表明: 1)现阶段“网喷+钢架+系统锚杆”的初期支护组合形式未充分发挥其作用效果,有效性差,措施过于保守,存在很大优化空间; 2)在土质或浅埋破碎岩质隧道初期支护中,系统锚杆无明显作用,可以取消,而只采用“网喷+钢架”组合形式; 3)在深埋岩质隧道初期支护中,采用“网喷+钢架”或“网喷+系统锚杆”2类组合形式之一即可。考虑到目前现场系统锚杆施作机具和施工质量,采用“网喷+钢架”的组合形式是合理和可行的。

关键词: 隧道, 初期支护, 组合形式, 现场试验, 有效性

Abstract:

The effectiveness of composition mode of primary support has been controversial. A large number of field testes have been carried out on the effectiveness of the different composition modes of primary support of Menghua Railway Tunnel under construction. The measurement items include crown top subsidence, horizontal convergence, axial force of anchor bolt and stress of shotcrete and steel frame. Tests are carried out on granite, slate, sand mudstone and loess strata; the representative data of granite of Grade Ⅲ, Ⅳ and Ⅴ and loess of Grade Ⅴ are analyzed, and the effectivenesses of different compositions of steel mesh shotcrete, steel frame and systematic anchor bolt in primary support of deep rock and soil tunnel are studied. The results show that: 1) The composition mode of steel mesh shotcrete+steel frame+systematic anchor bolt of primary support can not work effectively at present, and can be improved. 2) The anchor bolt can be canceled for its useless in soil or shallow broken rock tunnel primary support; and steel mesh shotcrete+steel frame mode can be adopted. 3) The composition mode of steel mesh shotcrete+steel frame and steel mesh shotcrete+systematic anchor can be adopted selectively in deep rock tunnel primary support. The composition mode of steel mesh shotcrete+steel frame of primary support is rational and feasible considering the uncontrollable present quality of construction machinery and systematic anchor bolt.

Key words: tunnel, primary support, composition mode, field test, effectiveness

中图分类号: