FIELD: construction engineering. SUBSTANCE: support for underground structure of subway type has tubbing units and their joints are provided with sealing liners and are tightened by bolts uniformly over entire circumference of tubbing units. Additionally inserted between liners into joints of tubbing units are sectional rings of double-tee cross-section. Outer flange of rings is used to cover joint from outside. Additionally installed along support are longitudinal beams in the form of double-tee beam or rail which are connected in areas of joints with internal flanges of sectional rings. Aforesaid embodiment of support is of high strength, ensuring long service life and safety operation in extreme conditions such as at settling of structures in low-stable ground matter, at substantial seismic occurrences in result of earthquakes and other unexpected cases. EFFECT: higher efficiency. 2 dwg
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