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(19)

RU

(11)

2 018 678

(13)

C1

(51)

IPC

(21) (22)

Application

4756166/03, 1989-11-09

(22)

Actual filing date

1989-11-09

(45)

Published

1994-08-30

(72)

Inventor

Lebedev V.A.

(73)

Holder

Lebedev Valerian Alekseevich

UNDERGROUND STRUCTURE Russian patent published in 1994 - IPC

Abstract RU 2018678 C1

FIELD: construction. SUBSTANCE: underground structure includes ring and relieving structures in form of cantilever which consists of curved and straight parts. Relieving structure is secured to ring of curved part. Curved part is made in form of arch of circle confined by angle of 20 deg. with curvature opposite to that of ring and conjugated with ring over horizontal diameter. Radial of circles of curved part of cantilever and ring satisfy the ratio of 4.75:1. EFFECT: improved reliability of structure. 3 dwg

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RU 2 018 678 C1

Authors

Lebedev V.A.

Dates

1994-08-30—Published

1989-11-09—Filed

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