Wall element for an underground gallery

Details Wall element for an underground gallery Wall element for an underground gallery

E - Fixed Constructions

21

D

61/64

E21D 11/14 (2006.01) E21D 11/15 (2006.01) E21D 11/18 (2006.01) E21D 11/20 (2006.01)

Patent

CA 1175249

ABSTRACT OF THE DISCLOSURE A wall element for an underground gallery has a W-shaped member which is symmetrical relative to its .gamma.-axis and has an axis of gravity coinciding with its x-axis and lying at approximately the center of its height, wherein the thickness of its lateral flange portions, base portions and connecting web portions are selected so that, in relation to used weight per unit length, the W-shaped member has a maximum possible moment of resistance relative to the x-axis and a maximum possible bending load capacity in the plastic deformation range, and the W-shaped member has such a profile and such thicknesses of these portions that it has at least approximately equal bending load capacities in the plastic deformation region in two opposite directions along the .gamma.-axis.

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