FIELD: civil engineering; erection of underground gravity-flow concrete pipe lines. SUBSTANCE: concrete panels are laid on concrete tubes; upper surface of each concrete panel is made in form of parabolic cylinder at height in lock from thickness of tube to height of arch of natural equilibrium of fill-up soil of trench. EFFECT: enhanced durability of pipe line due to improved corrosion resistance of its arch.
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Authors
Dates
1998-12-10—Published
1997-02-18—Filed