HThe cross-arm prestressed concrete pole series
TB/T 2286 C50prestressed concrete
Specifications
| Model | H series |
|---|---|
| Standard | GB/T 25020, TB/T 2286 (steel masts for electrified railway OCS) Series standards |
| Operating Temperature | -40℃~+70℃ |
| Altitude | <4000m |
| Materials | Q235B/Q355Bsteel with hot-dip galvanizing, prestressed concrete, aluminium alloy (emergency repair) |
| Installation | direct burial/flange foundation installation, whole-mast erection |
cross-arm (H type)prestressed concrete poles cost less and insulate well, and are very common on conventional-speed railways.Designed and produced to the TB/T 2286 series industry standard, with concrete strength class at least C50.In the model H denotes the cross-arm concrete pole; the numbers give mast capacity (kN·m), height above ground and embedment (m); some poles use cup foundations (denominator 1.5 in the size) or flange foundations.
| Common models | Mast capacity(kN·m) | Height above ground(m) | Embedment depth(m) | Notes |
|---|---|---|---|---|
| H60/8.7+3.0 | 60 | 8.7 | 3.0 | one of the most basic common models |
| H78/8.7+3.0 | 78 | 8.7 | 3.0 | slightly larger capacity |
| H170-250/12+3.5 | 170 | 12 | 3.5 | large-capacity, tall mast |
| Standard | TB/T 2286 series |
| Structure type | cross-arm (H type) |
| Concrete strength | at least C50 |
| Foundation type | cup foundation (denominator 1.5) or flange foundation |
| Scope of application | supports of conventional-speed railway OCS |
Performance
Operating Conditions
for sections, station OCS support structures, bearing suspension load, wind load and ice load.
Mechanical Performance
Standard test bending moments meet the TB/T 2286 class series; hot-dip galvanizing lasts at least 30 years and concrete pole crack resistance is type-tested.
Electrical Performance
with earthing terminal, meeting mast earthing and stray-current protection requirements.
Applications
cross-arm prestressed concrete poles on mainline sections H series are arranged by span and load on mainline sections.
Station throat areas:
cross-arm prestressed concretemast H series work with head-span beams in multi-track station areas.
Emergency repair:
cross-arm prestressed concretemast H series restore power supply quickly after storm-pole failures.
Corrosive environments:
cross-arm prestressed concretemast H series use thickened hot-dip galvanizing in coastal corrosive environments.
