ANNULAR SUPPORT SECTION Russian patent published in 2006 - IPC E21D11/04 E21D5/08 

FIELD: building structures adapted for rock mine consolidation and used as load-bearing unit members of pipe conduit systems, shaft and vent channels and so on.

SUBSTANCE: support section comprises outer wall, annular flanges with orifices made in each flange, as well as support and connection members. Continuous inner wall extends around inner section contour. The support members are made as linear support profiles having constant cross-sections and located between two walls so that the support profiles abut upon inner ends of annular flanges secured to them. The support profiles extend along generators thereof and distributed over cross-section of support section so that the profiles define longitudinal cavities. Inner and outer walls, annular flanges and support profiles are made of composite material with reinforcing material including glass, basalt, hydrocarbon, polymeric or synthetic fibers or combination thereof having diameters of 5-25 μm and polymeric binding substance. Reinforcing material volume is 40-85% of composite material volume.

EFFECT: increased strength and structural rigidity, reduced mass and improved manufacturability and service performance.

24 cl, 17 dwg