›› 2009, Vol. 30 ›› Issue (6): 1575-1582.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Pull-out model test for tunnel anchorage and numerical analysis

HU Bo1，ZHAO Hai-bin2，WANG Si-jing3，LIU Hai-ning4，PENG Yun-dong5，LIU Xiao-li6，ZHANG Xiao-ping3   

  1. 1. State Grid Electric Power Research Institute, Nanjing 210003, China; 2. Mid-south Design & Research Institute, CHECG, Changsha 410014, China; 3. Key Laboratory of Engineering Geomechanics, Chinese Academy of Sciences, Beijing 100029, China; 4. Department of Geotechnical Engineering and Hydraulic Structures, North China University of Water Conservancy and Eydroelectric Power, Zhengzhou 450011, China; 5. China Highway Planning and Design Institute, Beijing 100010, China; 6. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China
  • Received:2007-06-17 Online:2009-06-10 Published:2011-03-09

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Abstract:

In-situ pull-out model test and numerical analysis FLAC3D are integrated to study the mechanical behaviors of tunnel anchorage. The in-situ model test of west anchorage of Baling River Bridge is introduced in detail. According to the model test, it is found that the displacement of cross-section shows saddle-shaped, and trapezium-shaped along the axes. The rate of residual displacement appears V-shaped. The monitoring displacement of large scale model is bigger than that of the small one. From the numerical analysis, it is found that the stress distribution shows subsection character, and the stress distributes unsymmetrically along anchorage. And plug-shaped tensile-shear complex failure caused by anchorage in surrounding rock may be a failure mode. The rock mass in damage zones and prominent deformation zones should be paid more attention to during design and construction.

Key words: tunnel anchorage, pull-out model test, dimensional effect, FLAC3D, failure mode

CLC Number: 

  • U 455.7+1
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