库尉输水隧洞塌方机制分析及加固效果评价

doi:10.13722/j.cnki.jrme.2015.0038

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (681 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The groundwater level around the front section of the Kuyu water conveyance tunnel is far above the ceiling of the tunnel，causing groundwater infiltration to be so severe that it ‘rains’ constantly in the tunnel. During construction，accidental collapse occurred often and many collapse galleries were formed above the tunnel，which brought serious problems and delays to the construction. Based on investigation and analysis of some of the collapse incidents，the failure mechanism was studied systematically using the finite difference software FLAC3D，and the effectiveness of ground reinforcement on a typical collapse section was assessed. The study showed that the formation lithology was the internal cause of the collapses，and that the groundwater further exacerbated the instability potential，with the deformation almost triple that under anhydrous conditions. Lack of timely initial support and too large an advance per excavation cycle were two direct causes of tunnel collapses，as these practices caused additional deformation of 80% and 20% respectively. The rationality of the ground reinforcement schemes and the quality of construction of the ground support system are crucial to the long-term stability of the tunnel.

Key words： tunnelling engineering high groundwater level soil tunnel collapse mechanism ground reinforcement effect

	Service

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

Cite this article:

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.0038 OR http://www.rockmech.org/EN/Y2015/V34/I12/2531

[3]	FRALDI M，GUARRACINO F. Analytical solutions for collapse mechanisms in tunnels with arbitrary cross sections[J]. International Journal of Solids and Structures，2010，47(2)：216-223.
[4]	FRALDI M，GUARRACINO F. Limit analysis of collapse mechanisms in cavities and tunnels according to the Hoek-Brown failure criterion[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(4)：665-673.
[6]	YANG X L，HUANG F. Collapse mechanism of shallow tunnel based on nonlinear Hoek-Brown failure criterion[J]. Tunnelling and Underground Space Technology，2011，26(6)：686-691.
[7]	HUANG F，YANG X L. Upper bound limit analysis of collapse shape for circular tunnel subjected to pore pressure based on the Hoek-Brown failure criterion[J]. Tunnelling and Underground Space Technology，2011，26(5)：614-618.
[14]	汪波，李天斌，何川，等. 强震区软岩隧道大变形破坏特征及其成因机制分析[J]. 岩石力学与工程学报，2012，31(5)：928-936.(WANG Bo，LI Tianbin，HE Chuan，et al. Analysis of failure properties and formatting mechanism of soft rock tunnel in meizoseismal areas[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(5)：928-936.(in Chinese))
[15]	汪成兵，朱合华. 埋深对软弱隧道围岩破坏影响机制试验研究[J]. 岩石力学与工程学报，2010，29(12)：2 442-2 448.(WANG Chengbing，ZHU Hehua. Experimental study of influence mechanism of buried depth on surrounding rock failure of tunnel constructed in soft rock[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 442-2 448.(in Chinese))
[16]	石钰锋，阳军生，邵华平，等. 超浅覆大断面暗挖隧道下穿富水河道施工风险分析及控制研究[J]. 岩土力学，2012，23(增2)：229-234.(SHI Yufeng，YANG Junsheng，SHAO Huaping，et al. Risk analysis and control study of super-shallow tunnel with large cross-section under water-rich channel[J]. Rock and Soil Mechanics，2012，23(Supp.2)：229-234.(in Chinese))
[2]	WOLFHARD L. Analysis of collapses on tunnel construction sites on the new lines of the German Federal Railway[J]. Tunnelling and Underground Space Technology，1990，5(3)：199-203. " target="_blank">
[5]	SHIN H S，KWON Y C，JUNG Y S，et al. Methodology for quantitative hazard assessment for tunnel collapses based on case histories in Korea[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(6)：1 072-1 087. " target="_blank">
[8]	王吉亮，陈剑平，苏生瑞，等. 节理岩体隧道塌方机制离散元研究[J]. 中国矿业大学学报，2008，37(3)：316-319.(WANG Jiliang，CHEN Jianping，SU Shengrui，et al. Study of collapse mechanism of tunnels in jointed rock mass by distinct element method[J]. Journal of China University of Mining and Technology，2008，37(3)：316-319.(in Chinese)) " target="_blank">
[11]	汪成兵，朱合华. 隧道塌方机制及其影响因素离散元模拟[J]. 岩土工程学报，2008，30(3)：450-456.(WANG Chengbing，ZHU Hehua. Tunnel collapse mechanism and numerical analysis of its influencing factors[J]. Chinese Journal of Geotechnical Engineering，2008，30(3)：450-456.(in Chinese))
[17]	吴强. 马垭口隧道塌方灾害发生机制及处治措施的研究[硕士学位论文][D]. 重庆：重庆大学，2009.(WU Qiang. Study on treatment measures and formation mechanism of the collapse disaster in mayakou tunnel[M. S. Thesis][D]. Chongqing：Chongqing University，2009.(in Chinese)) " target="_blank">
[1]	魏星，沈乐，陶志平. 富水软岩隧道突泥塌方及地层沉降的模型试验[J]. 岩土力学，2012，33(8)：2 291-2 296.(WEI Xing，SHEN Le，TAO Zhiping. Model test studies of collapse and settlement of tunnel in saturated soft rocks[J]. Rock and Soil Mechanics，2012，33(8)：2 291-2 296.(in Chinese))
[9]	马亢，徐进，吴赛钢，等. 公路隧道局部塌方洞段的围岩稳定性评价[J]. 岩土力学，2009，30(10)：2 955-2 960.(MA Kang，XU Jin，WU Saigang，et al. Research on surrounding rock stability in local collapse section of highway tunnels[J]. Rock and Soil Mechanics，2009，30(10)：2 955-2 960.(in Chinese)) " target="_blank">
[10]	王迎超，尚岳全，徐兴华，等. 隧道出洞口松散围岩塌方时空预测研究[J]. 岩土工程学报，2010，32(12)：1 868-1 874.(WANG Yingchao，SHANG Yuequan，XU Xinghua，et al. Time and space prediction of collapse of loose wall rock at tunnel exit[J]. Chinese Journal of Geotechnical Engineering，2010，32(12)：1 868-1 874.(in Chinese))
[12]	王迎超，尚岳全，靖洪文，等. 隧道塌方段施工方案优化及效果评价[J]. 岩土力学，2011，32(增2)：514-520.(WANG Yingchao，SHANG Yuequan，JING Hongwen，et al. Optimization of construction scheme of tunnel collapse and treatment effect[J]. Rock and Soil Mechanics，2011，32(Supp.2)：514-520.(in Chinese))
[13]	陈秋南，张永兴，刘新荣，等. 隧道塌方区加固后的施工监测与仿真分析[J]. 岩石力学与工程学报，2006，25(1)：158-161.(CHEN Qiunan，ZHANG Yongxing，LIU Xinrong，et al. In-situ monitoring and fem simulation analysis of consolidation for a collapsed highway tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(1)：158-161.(in Chinese))