隧道预支护对控制围岩变形的力学效果研究

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摘要研究目的：基于三维弹塑性有限元方法对隧道开挖面预支护及顶部预支护进行参数分析，研究隧道开挖过程中有无顶部预支护条件下不同开挖方式、不同核心土长度、不同台阶长度对地层沉降、管棚力学行为及开挖面稳定性的影响，总结一些规律性的认识,为复杂地质条件下隧道开挖方式的选择及顶部预支护设计提供一定参考。

研究结论：(1)留设核心土可以显著改善开挖面的稳定性,核心土的最佳长度大约在D/3~2D/3范围内，施工中应尽量使核心土长度与台阶长度相等。(2)核心土抑制围岩水平位移的作用有限，在软弱地层，单纯依靠核心土的作用并不能控制水平位移,应结合管棚预支护等隧道顶部预支护措施。

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	王海涛
	贾金青

关键词 ：隧道工程, 开挖面, 核心土, 管棚预支护

Abstract：Research purposes: With the three-dimensional elasto-plastic finite element method，the design parameters of the advanced supporting and the roof supporting for the excavation surface of the tunnel were analyzed，the effects of the different excavation methods and the different lengths of bench and core soil on the ground settlement，the mechanical behaviors of pipe roof supporting and stability of the excavation surface under conditions of having roof supporting and having no roof supporting were studied and the regular knowledges were summarized for providing the reference to the selection of the excavation method of tunnel under the complex geological condition and the design of the roof supporting. Research conclusions: (1) Remaining the core soil can significantly improve the excavation fsurace stability and the optimal length of core soil is in D/3~2D/3 range. In the process of construction，the length of the core soil should be equal to the bench length. (2) The core soil plays a little role in controlling the horizontal displacement of surrounding rock. In weak stratum， the horizontal displacement can be controlled by using the core soil along with taking the measures of roof supporting like the pipe roof reinforcement，rather than only by using the core soil.

Key words： tunnel engineering tunnel surface core soil pipe roof supporting

收稿日期: 2012-01-17

PACS:

U456

作者简介: 王海涛,1982年出生，男，讲师;贾金青,1962年出生，男，教授。

引用本文:

王海涛,贾金青. 隧道预支护对控制围岩变形的力学效果研究[J]. 铁道工程学报, 2013, 30(1): 54-60.
WANG Hai-tao，JIA Jin-qing. Mechanical Effects of Advanced Supporting on Controlling Deformation of Surrounding Rock of Tunnel. 铁道工程学报, 2013, 30(1): 54-60.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2013/V30/I1/54

[l] 王梦恕.北京地铁浅埋暗挖法施工[J].岩石力学与工程学报，1989(1): 52-61. Wang Mengshu. The Boring Excavation Method and Construction in Beijing Metro [J]. Chinese Journal of Rock Mechanics and Engineering, 1989(1): 52-61.

[2] 张健儒.山岭隧道高压富水断层破碎带注浆施工技术[J].铁道工程学报,2010(5): 58-62. Zhang Jianru. Grouting Technology for Construction of Water-rich Fault Fracture Zone Mountain Tunnel in High-pressure [J]. Journal of Railway Engineering Society, 2010(5): 58-62.

[3] 常艄东.管棚法超前预支护作用机理的研究[D].成都: 西南交通大学，1999. Chang Shaodong. Research on Pre-brace Mechanism of Pipe Umbrella Method [D]. Chengdu: Southwest Jiaotong University, 1999.

[4] 王明年,张建华.工程措施对控制隧道围岩变形的力学效果研究[J].岩土工程学报， 1998(5): 27-30. Wang Mingnian, Zhang Jianhua. Mechanical Effects of Engineering Measures in Controlling the Deformation in the Surrounding Rock of the Tunnel [J]. Chinese Journal of Geotechnical Engineering, 1998(5): 27-30.

[5] Seki J，Noda K，Washizawa E，etc . Effect of Bench Length on Stability of Tunnel Face [J]. Tunneling and Ground Conditions, 1994(2): 21-31.

[6] 杨金虎，陈家清，何刚，等.复杂环境条件下砂质粘土隧洞施工监控量测研究[J].岩石力学与工程学报，2005(24): 4588-4593. Yang Jinhu, Chen Jiaqing, He Gang，etc. Research on Monitoring and Measuring of Sandy Clay Tunnel Construction under Complex Conditions [J]. Chinese Journal of Rock Mechanics and Engineering，2005(24): 4588-4593.

[7] 皇甫明，孔恒，王梦恕，等.核心土留设对隧道工作面稳定性的影响[J].岩石力学与工程学报, 2005(3): 521-525. Huang Fuming，Kong Heng，Wang Mengshu，etc. Effect of Keeping Core Soil on Stability of Tunnel Working Face [J]. Chinese Journal of Rock Mechanics and Engineering, 2005(3): 521-525.