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隧道建设(中英文) ›› 2013, Vol. 33 ›› Issue (3): 173-178.DOI: 10.3973/j.issn.1672-741X.2013.03.001

• 研究与探索 •    下一篇

大断面黄土隧道施工工法研究

石磊1, 侯小军2, 武进广1   

  1. (1.中铁七局集团有限公司, 河南 郑州 450016; 2.中铁一局集团有限公司, 陕西 西安 710000)
  • 收稿日期:2012-10-29 修回日期:2012-12-20 出版日期:2013-03-20 发布日期:2013-03-23
  • 作者简介:石磊(1976—),男,陕西蓝田人,1998年毕业于西南交通大学地下结构与隧道工程专业,硕士,高级工程师,现从事隧道及地下工程施工管理工作。

Research on Construction Methods for Large Crosssection Loess Tunnels

SHI Lei1, HOU Xiaojun2, WU Jinguang1   

  1. (1. China Railway 7th Bureau Group Co., Ltd., Zhengzhou 450016, Henan, China; 2. China Railway First Bureau Group Co., Ltd., Xi’an 710000, Shaanxi, China)
  • Received:2012-10-29 Revised:2012-12-20 Online:2013-03-20 Published:2013-03-23

摘要:

以墩梁隧道为背景,采用高精度全站仪和反光膜片进行隧道施工现场监控量测。通过量测数据分析,比较了双侧壁导坑、单侧壁导坑和三台阶开挖施工工法在大断面黄土隧道中的适用性及优缺点,得出: 双侧壁导坑法操作安全系数高,适应性较强,控制围岩松弛效果明显,但造价高;单侧壁导坑法对围岩扰动小,但施工进度较慢;三台阶法施工进度快,但在地质较差地段变形难以控制;采取及时闭合成环的方法、重视及优化锁脚锚杆施工、控制仰拱与掌子面间的距离可有效地控制施工变形。

关键词: 大断面, 黄土隧道, 双侧壁导坑法, 单侧壁导坑法, 三台阶法

Abstract:

Site monitoring is made during the construction of Dunliang tunnel. Comparison and contrast are made, on basis of the monitoring results, among double side drift method, single side drift method and threebench method in terms of advantages, disadvantages and applicability. Conclusions drawn are as follows: Double side drift method has high safety coefficient, high applicability and obvious relaxcontrol effect, but has high cost; Single side drift method has little disturbance to the rock mass, but has slow construction advance rate; Threebench method has obvious advantages in construction advance rate, but has poor deformationcontrol effect in adverse geological conditions; Countermeasures, such as timely ring forming, footlocking bolts and good control of the distance between the tunnel face and the invert, have good effect in deformation control.

Key words: large crosssection, loess tunnel, double side drift method, single side drift method, threebench method