软岩隧洞锁脚锚杆–钢拱架联合承载分析

doi:10.13722/j.cnki.jrme.2015.01.014

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (722 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Combined structure of feet-lock bolt and steel arch is an effective support measure in preventing the crown settlement. An analytical model to calculate the support of joint bearing with feet-lock bolt and steel arch in weak rock tunnel was established considering the compatibility conditions of bending moment，axial force，shear force and deformations at the junction. The steel arch was taken as a fixed arch and was analyzed using the method of structural mechanics. The formulae describing the lateral and axial mechanical behaviors of feet-lock bolt were derived with the methods of elastic foundation beam and load transfer respectively. The internal forces and the deformation of feet-lock bolt were studied through an example，and the results were compared with the model given in a reference paper in which the bending moment and deformation compatibility conditions at the junction were ignored. The influence of different installation angles of feet-lock bolt on its internal force and deformations at the junction was discussed. Finally，the influencing factors for the effect in controlling the crown subsidence were studied，including the lateral pressure coefficient and stiffness of surrounding rock，and the parameters of feet-lock bolt. The results indicated that the welded part was the weakest link for feet-lock bolt and should be welded firmly. The bending moment transfer at the junction was recommended to be considered. The lateral resistance to bolt mainly concentrated in the region near the end of bolt，where the surrounding rock should be specially reinforced. Extra length of bolt had no effect to its lateral behavior. The best installation angle was found to be about 45°.：Using more feet-lock bolt(pipe) or using feet-lock bolt(pipe) of high specification enhanced support effect. A low value of the lateral pressure coefficient of surrounding rock be better considered in the design of feet-lock bolt.

Key words： tunnelling engineering weak rock feet-lock bolt steel arch elastic foundation beam joint bearing

Received: 26 December 2013

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.01.014 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I1/129

[1] 伍毅敏，吕康成. 隧道大变形灾害施工监控技术研究[J]. 中国地质灾害与防治学报，2007，18(1)：133–137.(WU Yimin，LU Kangcheng. Study on monitoring techniques for large deformation hazard in tunnel[J]. Chinese Journal of Geological Hazard and Control，2007，18(1)：133–137.(in Chinese)) [2] 田兴柏. 水工隧洞软弱围岩不同部位变形处理技术措施[J]. 铁道建筑技术，2010，(4)：36–40.(TIAN Xingbai. Processing method for deformation in different parts of weak surrounding rocks in hydraulic tunnel[J]. Railway Construction Technology，2010，(4)：36–40.(in Chinese)) [3] 史振宇. 包家山特长隧道富水千枚岩地段快速施工技术[J]. 隧道建设，2009，29(1)：72–75.(SHI Zhenyu. Rapid construction technology in water-rich phyllite stratum in Baojiashan extra-long tunnel[J]. Tunnel Construction，2009，29(1)：72–75.(in Chinese)) [4] 曾超. 大断面海底隧道异常变形控制措施研究[J]. 岩石力学与工程学报，2007，26(11)：2 170–2 175.(ZENG Chao. Study on abnormal deformation controlling measures for large cross-section subsea tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(11)：2 170–2 175.(in Chinese)) [5] 黄明琦. 锁脚锚杆作用机制及其在厦门翔安隧道中的应用研究[J]. 铁道建筑技术，2009，(7)：86–89.(HUANG Mingqi. Feet-lock bolt mechanism and its application in Xiamen Xiang'an Tunnel[J]. Railway Construction Technology，2009，(7)：86–89.(in Chinese)) [6] 徐晨. 软弱围岩隧道中锁脚锚杆支护效果研究[硕士学位论文][D]. 西安：长安大学，2010.(XU Chen. Study on feet-lock bolt supporting effect for tunnels in soft surrounding rock[M. S. Thesis][D]. Xi?an：Chang?an University，2010.(in Chinese)) [7] 张涛. 软弱围岩隧道锁脚锚杆(管)支护特性研究[硕士学位论文][D]. 西安：长安大学，2011.(ZHANG Tao. Study on supporting characteristic of tunnel feet-lock bolt(pipe) in weak surrounding rock[M. S. Thesis][D]. Xi?an：Chang?an University，2011.(in Chinese)) [8] 周宇. 锁脚锚管和仰拱注浆对控制大断面海底隧道位移的有效性分析[J]. 岩石力学与工程学报，2007，26(增2)：3 830–3 834. (ZHOU Yu. Validity analysis of locking anchor pipe and grouting in inverted arch for displacement control of large-section subsea tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：3 830–3 834.(in Chinese)) [9] 邓国华，邵生俊，陶虎，等. 锁脚锚管对土质隧道围岩变形和支护内力的影响研究[J]. 土木工程学报，2010，43(1)：108–113.(DENG Guohua， SHAO Shengjun，TAO Hu，et al. A study of the effects of locking tremies on the internal force of tunnel support and the deformation of surrounding soil[J]. China Civil Engineering Journal，2010，43(1)：108–113.(in Chinese)) [10] 伍毅敏，吕康成，徐岳. 软弱地基隧道锁脚钢管承载特性研究[J]. 岩土工程学报，2009，31(12)：1 825–1 832.(WU Yimin，LU Kangcheng，XU Yue. Bearing behaviors of steel foot pipes for tunnels in soft foundation[J]. Chinese Journal of Geotechnical Engineering，2009，31(12)：1 825–1 832.(in Chinese)) [11] 罗彦斌，陈建勋. 软弱围岩隧道锁脚锚杆受力特性及其力学计算模型[J]. 岩土工程学报，2013，35(8)：1 519–1 525.(LUO Yanbin，CHEN Jianxun. Mechanical characteristics and mechanical calculation model of tunnel feet-lock bolt in weak surrounding rock[J]. Chinese Journal of Geotechnical Engineering，2013，35(8)：1 519–1 525.(in Chinese)) [12] 中华人民共和国行业标准编写组. JTG/T D70—2010公路隧道设计细则[S]. 北京：人民交通出版社，2010.(The Professional Standards Compilation Group of the People′s Republic of China. JTG/T D70—2010 Guidelines for design of highway tunnel[S]. Beijing：China Communications Press，2010.(in Chinese)) [13] 龙驭球. 弹性地基梁的计算[M]. 北京：人民教育出版社，1982：14–26.(LONG Yuqiu. The calculation of beam on elastic foundation[M]. Beijing：People?s Education Press，1982：14–26.(in Chinese)) [14] 罗惟德. 单桩承载机制分析与载荷–沉降曲线的理论推导[J]. 岩土工程学报，1990，12(1)：35–44.(LUO Weide. Study on load- settlement equation for loaded pile-soil system[J]. Chinese Journal of Geotechnical Engineering，1990，12(1)：35–44.(in Chinese)) [15] 李作勤. 摩擦桩的荷载传递及承载力的一些问题[J]. 岩土力学，1990，11(4)：1–12.(LI Zuoqin. Some problems concerning load transfer and bearing capacity of friction piles[J]. Rock and Soil Mechanics，1990，11(4)：1–12.(in Chinese)) [16] 中华人民共和国行业标准编写组. JTG D70—2004公路隧道设计规范[S]. 北京：人民交通出版社，2004.(The Professional Standards Compilation Group of the People′s Republic of China. JTG D70— 2004 Code for design of road tunnel[S]. Beijing：China Communications Press，2004.(in Chinese))