Normal reinforced concrete ring OD (outer diameter) /ID (inner diameter) = 5500/5100 MM Normal reinforced concrete rings OD/ID = 5500/5100 mm are elements of the individual key segments intended for the assembly of the tunnel ring in the tunnel lining for sealed tunnel lining of underground tunnels.
Reinforced concrete blocks are used as blocks under the index:
The blocks are made of heavy concrete in accordance with GOST 26633. Compressive strength class of concrete is B35 (concrete grade M450).
Frost resistance grade of concrete is F150 according to GOST 10060.0.
Water resistance of concrete is W6 in accordance with GOST 12730.5
Reinforcing steel is used for block reinforcement:
Steel grade C235 to GOST 27772 is used for embedded parts
Technical specifications
Name of the characteristic |
Block mark |
||
55 LAF |
55 Н pr |
55V |
|
|
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Concrete volume,
м3 |
0,846 |
0,47 |
0,011 |
Weight, t |
2,12±7% |
1,18±7% |
0,0275 |
The design load-bearing capacity of the lining,
t/m2 |
40 t/m2 - vertical uniformly distributed load, 13 t/m2 - horizontal with an elasticity coefficient of the ground of 20 kg/cm2 |
Materials used in the production of normal reinforced concrete rings OD/ID = 5500/5100 mm: