›› 2010, Vol. 31 ›› Issue (3): 673-676.

• Fundamental Theroy and Experimental Research •     Next Articles

Test study of osmotic behavior of fractured rock mass of water tunnel under high water pressure

JIANG Zhong-ming 1, 2, 3，FENG Shu-rong2，FU Sheng2，CHEN Sheng-hong1   

  1. 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Mid-South Design and Research Institute, CHECC, Changsha 410014, China; 3. Institute of Geotechnical Engineering, Changsha University of Science & Technology, Changsha 410076, China
  • Received:2008-09-10 Online:2010-03-10 Published:2010-03-31

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Abstract:

Combined with high pressure permeability test, conventional pressure permeability test and indoor permeability test for fractured rock mass of high pressure water tunnel in one water-pumped storage power project, the variation law of rock mass permeability under high water pressure is analyzed to describe the relation between discharge and water pressure. Through the calculation of permeability coefficient of fractured rock mass, relation between water pressure and permeability coefficient is also discussed. By comparing the results of high pressure permeability test, conventional pressure permeability test and indoor permeability test, the environmental stress and water pressure state of rock mass are considered as the main factors influencing the permeability coefficient. The test results indicate that the permeability coefficients in high water pressure are obviously greater than ones in low water pressure state. It is also pointed out that the permeability coefficients in indoor test are greater than ones obtained from in situ test.

Key words: fractured rock mass, high pressure permeability test, permeability coefficient, state of stress

CLC Number: 

  • TV 139.1
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