The DTVI-2 railway fastening system, with its performance characteristics tailored to metro operations, has well-defined and extensive applications in urban rail transit.
The general vibration reduction sections of metro main lines represent its core application scenario. As the backbone of passenger transportation, main lines feature high train frequency and stable speeds, demanding stringent requirements for track stability and vibration damping. The DTVI-2 system's two-stage elastic structure (dual-layer pads under rail and baseplate) effectively absorbs vibrations, reducing impacts on tunnel structures and nearby buildings-particularly suitable for mainline sections passing through urban built-up areas. For example, multiple Guangzhou Metro lines traversing old city districts have adopted this system to balance operational efficiency and environmental vibration control.
The system is also widely used in metro branch lines and extensions. Although branch lines handle smaller passenger volumes than main lines, they often pass through densely populated residential areas with vibration sensitivity concerns. With ±10mm gauge adjustment and 15mm vertical adjustment capabilities, the system accommodates potential minor subgrade settlement on branch lines. Simple replacement of insulated gauge blocks or adjustment of pad thickness ensures stable track geometry parameters while reducing long-term maintenance costs-advantages validated in practice on several Shenzhen Metro branch lines.
Another key application is test tracks and maintenance depot lines within rolling stock depots. Test tracks must simulate mainline operating conditions, requiring high fastening stability. The DTVI-2 system's Type I spring clips provide consistent clamping force, withstanding frequent start-stop impacts during train testing. In maintenance depots where trains move at low speeds, the system's insulation performance (resistance >10⁸Ω) prevents stray current interference with inspection equipment, ensuring operational safety.
Additionally, the system meets requirements for metro transition sections (e.g., interfaces between underground and surface lines) where moderate vibration reduction and cost-effectiveness must be balanced, serving as a reliable solution connecting different track types.
GNEE RAIL is a professional trading company focusing on the export of railway fasteners, committed to providing reliable rail connection products for global railway construction projects. The main products include a full range of railway fasteners such as various spring clip fastener systems, sleeper bolts, anti-loosening washers and insulating components, which are suitable for various application scenarios such as conventional railways, heavy-duty railways and urban rail transit.