锁脚锚管合理打设角度的理论研究

doi:10.13722/j.cnki.jrme.2014.1351

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摘要锁脚锚管打设角度是影响其控制钢拱架下沉效果的重要参数。为确定锁脚锚管的合理打设角度，在简要分析其作用机制的基础上，建立了钢拱架-锁脚锚管力学解析模型，利用结构力学、弹性地基梁等理论推导了锁脚锚管打设角度与钢拱架拱顶沉降的理论关系，进而通过算例分析揭示了钢拱架拱顶沉降随锁脚锚管打设角度的变化规律，确定了锁脚锚管的合理打设角度，并阐释了相应的作用机制。分析表明，锁脚锚管的合理打设角度为45°左右。该结论具有一般性，且与诸多现场工程经验吻合，证明了本文公式的正确性，同时为锁脚锚管的合理打设角度提供了理论支持，适合在锁脚锚管设计和施工中推广。

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关键词 ：隧洞, 锁脚锚管, 打设角度, 钢拱架, 弹性地基梁

Abstract：The installation angle of feet-lock pipe has a great influence on the support effect in controlling the subsidence of steel arch. In order to determine the reasonable installation angle，an analytical model of feet-lock pipe and steel arch is established based on a brief analysis of the working mechanism of feet-lock pipe. The theoretical correlation between the installation angle of feet-lock pipe and the vertical displacement of vault is derived using the theory of structural analysis，elastic foundation beam，etc. Then an example analysis is presented in detail to determine the reasonable installation of feet-lock pipe and explain the corresponding mechanism. Analysis indicates that the reasonable installation angle of feet-lock pipe is around 45°. More importantly，this proved to be a general conclusion which is consistent with lots of the experience from construction site. Accordingly，the formulas derived in this paper are proved to be correct. It can provide theoretical support for determining the reasonable installation angle of feet-lock pipe，and the conclusion could be employed in the related design and construction.

Key words： tunnel feet-lock pipe installation angle steel arch elastic foundation beam

引用本文:

陈丽俊，张运良，马震岳. 锁脚锚管合理打设角度的理论研究[J]. 岩石力学与工程学报, 2015, 34(07): 5-5.
CHEN Lijun，ZHANG Yunliang，MA Zhenyue. THEORETICAL RESEARCH ON THE REASONABLE INSTALLATION ANGLE OF FEET-LOCK PIPE. , 2015, 34(07): 5-5.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.1351 或 http://www.rockmech.org/CN/Y2015/V34/I07/5

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