High-Strength Railway Embedded Spiral Bars for Structural Support

• Customization: Available
• After-sales Service: One Year
• Warranty: One Year
• Model NO.: P50
• Customized: Railway Fasteners
• Certification: ISO9001
• Type: Railway Fasteners
• Transport Package: Export Wooden Box
• Origin: Handan, Hebei Province, China
• Production Capacity: 10000

Product Description

Purpose:
1. Enhance anchoring force: This is the primary purpose. Spiral bars are wound around the main anchor bars (usually bolts or ribbed steel bars), forming a local "reinforcing ring". When the anchor bars are subjected to tensile force:
Spiral bars can effectively disperse the tensile force to a larger area of concrete.
It constrains the concrete around the anchor bars, significantly enhancing the local compressive strength and anti-splitting capacity of the concrete.
It greatly increases the resistance for the anchor bars to be pulled out of the concrete.
2. Preventing concrete splitting: When the anchor bars are subjected to significant force, the concrete near their ends is prone to radial splitting cracks. The existence of spiral bars is like a "hoop", tightly binding the concrete at the root of the anchor bars and effectively suppressing the occurrence of such splitting failure.
3. Enhance fatigue resistance: Railway structures (especially tracks) are subjected to repetitive and cyclic dynamic loads from trains. Spiral bars can significantly enhance the durability and fatigue resistance of anchoring nodes under long-term repeated loads by improving the stress distribution and constraining concrete.
4. Enhance node reliability: By integrating the above effects, embedded spiral bars significantly improve the overall reliability, safety and service life of the connection nodes between embedded parts (bolts, reinforcing bars) and concrete foundations.

 

Application scenarios (commonly seen in railway engineering) :
1. Foundation anchoring of the track system:
Track fastener bolts: This is the most widely used scenario. It is used to anchor track fasteners such as elastic bars and spacers to concrete sleepers, track slabs or integral track beds. The huge dynamic load of the train is transmitted to the foundation through fasteners. The spiral bars ensure that the bolts will not be pulled out or loosened under long-term repeated loads, guaranteeing the stability of the track geometry.
Turnout switch machine foundation/installation bolts: The foundation bolts that fix the turnout conversion equipment, bearing the operating force and vibration of the equipment.
The foundation anchoring of the rail expansion regulator: The bolts used to fix this special rail component also require strong anchoring force.
2. Contact network pillar foundation:
The catenary struts of electrified railways (including hard cross struts) are subjected to huge overturning moments generated by conductor tension and wind loads. The anchor bolts at the bottom of the pillar are subjected to huge tensile forces. Embedded spiral bars are key components to ensure the reliable anchoring of anchor bolt groups in the foundation concrete and prevent the pillars from being pulled down.
3. Foundation of Sound Barrier:
The sound barrier columns along the railway need to be firmly anchored to the foundation to resist wind loads and lateral forces caused by train wind. Embedded spiral bars are used to enhance the anchoring performance of the anchor bolts at the bottom of the columns.
4. Foundation anchoring of cable troughs and cable supports:
The embedded bolts for fixing cable tray covers, cable supports, etc. sometimes also require spiral ribs to enhance anchoring, especially in places that need to resist vibration or may be impacted by external forces.
5. Anchoring of bridge bearings
Although bridge bearings usually have large embedded steel plates and dense anchor bars, in some designs or specific force requirements, key anchor bars may also be equipped with spiral bars to provide additional anchoring protection.
6. Other ancillary facilities infrastructure:
Such as the foundation of platform canopy columns, signal machine foundations, communication equipment foundations, etc., wherever important structures or equipment need to be firmly anchored to the concrete foundation through bolts or reinforcing bars, and where the force is relatively large or there are fatigue requirements, embedded spiral bars may be used.

 

Although the embedded spiral reinforcement for railways is a relatively small component, it plays an indispensable role in ensuring the anchoring reliability of key railway structures (especially track fasteners and catenary pillars), preventing concrete cracking and failure, and enhancing the overall safety and durability of the structure. It is a mature and effective anchoring reinforcement technology widely applied in the construction of modern high-speed railways, heavy-haul railways and ordinary railways. Without it, the track fastener bolts are prone to loosening and failure under the repeated impact of the train, and the catenary struts also pose a risk of overturning, directly threatening the safety of train operation.

 

Railway embedded spiral bars are a very important type of anchoring and reinforcing component in railway engineering construction. They are mainly used to enhance the anchoring performance of steel bars or bolts in concrete, preventing them from being pulled out under force or causing concrete cracking and failure.