›› 2010, Vol. 31 ›› Issue (S1): 145-149.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research and analysis of comparative tests of optimization of methods for reinforcing soft surrounding rock of tunnel

LI Dan 1, 2，BAI Shi-wei2，CHEN Lu-wang3，CHEN Hao2，ZHAO Yu4   

  1. 1. College of Urban Construction ,Wuhan University of Science and Technology, Wuhan 430065, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 4. College of Civil Engineering, Chongqing University, Chongqing 400030, China
  • Received:2010-01-11 Online:2010-08-10 Published:2010-09-09

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Abstract:

In order to solve the problem of optimum supporting design of tunnel engineering with soft surrounding rock, a similar material of model of which the mechanical curve is similar to the origional rock is developed. The physical models corresponding with the cases which are usually used in soft rock engineering such as bolt supporting case, bolt and jetting supporting case , lengthed bolt and jetting supporting case, are made.As well as the bare tunnel case, the four models form a 3D model and are put into the large scale real triaxial physical model machine. So the research on supporting design of soft rock tunnel is base on the same boundary condition of model. The test results demonstrate that various supporting methods lead to various over loaded abilities and various failure character. The similar material is fit for the trait of large deformation of soft rock. The research provides reliable foundation for supporting design of soft rock tunnel as well.

Key words: soft rock, optimizing supporting design, real triaxial testing machine, bolt, bolt and jetting

CLC Number: 

  • U 456
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