Abstract
The problem of axial variation of stress concentrations at the periphery and normal to the axis of a circular tunnel is solved by means of the three-dimensional photoelasticity technique, under the following conditions:
-
1.
The center lines of two horizontal tunnels of equal diameter (2r) are separated by a distanceK and include an angle α.
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2.
K and α assume values of 0, 3r, 7/2r, 4r and 30 deg, 60 deg, 90 deg, respectively.
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3.
The tunnels are located in a uniform, uniaxial stress field normal to the axes of the tunnels.
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Abbreviations
- r :
-
radius of the tunnel
- K :
-
distance between the horizontal center lines of the tunnels
- α:
-
the angle between the horizontal projection of two tunnels
- θ:
-
the orientation angle for the radius of the tunnel
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Agarwal, R., Boshkov, S. Stress concentrations around horizontal circular tunnels. Experimental Mechanics 8, 474–478 (1968). https://doi.org/10.1007/BF02327412
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DOI: https://doi.org/10.1007/BF02327412