›› 2010, Vol. 31 ›› Issue (8): 2389-2393.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Triaxial permeability test of marble under complex stress path

WANG Jian-xiu 1,2, HU Li-sheng 1,2, YE Chong 1,2, TANG Yi-qun 1,2, YANG Ping 1,2   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai phases; 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2009-03-04 Online:2010-08-10 Published:2010-08-30

Abstract:

The stress condition of surrounding rock is very complicate under different construction phases and it is important to study the permeability of rock under the complex stress path. In order to study the relation between stress and permeability of marble, triaxial permeability test under general and loading-unloading of confining pressure on the basis of constant axial strain, (which is called strain in the following text) are carried out. Based on triaxial permeability test results, some conclusions can be drawn as follows. (1) In the general triaxial permeability test, the characteristics of permeability-strain curve of marble has three significant phases: the lowest permeability, the highest permeability and the stable permeability. (2) The permeability of marble decreases with the increase of (the absolute value of axial stress minus confining stress), following the law of exponential decay; (3) For the same value of , permeability of marble during the loading of confining stress phase is greater than it in the unloading of confining stress phase; (4) The variation of will influence the permeability of marble significantly when it decreases to a certain degree. (5) The permeability of marble will increase when decreases; and the recovery capability of permeability of marble will reduce with the increase of axial strain.

Key words: marble, complex stress path, triaxial permeability test, permeability

CLC Number: 

  • TU458
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