Delhi Metro Phase-IV Design Specifications: Track, Structure & Rolling Stock
Introduction to Delhi Metro Phase-IV Design Specifications
design specifications for the Phase-IV expansion. “>The Delhi Metro Rail Corporation Ltd. (DMRC) outlines comprehensive design specifications for the Phase-IV expansion. This document details critical aspects such as track geometry, track structure, and rolling stock requirements.
Track Geometry and Structure Specifications
Track Geometry: As per the approved Schedule of Dimensions (SoD) by DMRC. Key parameters include:
- Gauge: Standard Gauge at 1435 mm.
- Track C/C Distance: As specified in SoD.
- Rolling Stock Width: 3200 mm.
- Maximum Gradient: As per SoD.
- Track Type: Ballastless design.
Roadway and Railway Clearances
Clearances for Road Traffic: Must comply with Clause 104.4.2 of IRC: 5, ensuring a minimum of 5.50 m clearance from the crash barrier to the pier shaft. The clearance from road level to the soffit of the Metro structure must be maintained at 5.5 m.
Clearances for Railway Traffic: Follow the Schedule of Dimensions (SoD) of Indian Railways and DMRC. Railway crossing arrangements require approval from the relevant Railway Authority.
Clearances for Rolling Stock: Adhere to the approved Schedule of Dimensions by DMRC for rolling stock.
Design Life & Serviceability
The main structural systems should have a design life of 100 years, as per Clause 15.1.3 & 16.1.3 of IRS-CBC and Clause 3.6.5 of the IRS Steel Bridge Code.
Materials Parameters
Concrete Specifications:
- Young’s Modulus: Follow Clause 5.2.2.1 of IRS-CBC.
- Modular Ratio: As per Clause 5.2.6 of IRS-CBC, m1 = 280/fck for tensile reinforcement and m2 = 420/fck for compression reinforcement.
- Cover Requirements: Minimum cover for foundations is 75 mm, as per Clause 5.4.4 of IRS-CBC.
- Cement Specifications: Follow Clause 4.1 and other relevant sections of IRS-CBC.
- Density: Concrete density is 25 kN/m³ for PSC and RCC, 25 kN/m³ for plain cement concrete, and 26 kN/m³ for wet concrete.
- Poisson’s Ratio: Set at 0.15 for all concrete grades.
- Thermal Expansion Coefficient: Coefficient of 11.7 x10⁻⁶ °C⁻¹, in accordance with Clause 2.6.2 of IRS-Bridge Rules.
Prestressing Steel for Tendons:
- Characteristic Strength: Follow Clause 4.6 of IRS-CBC.
- Prestressing Units: Type 0.6” strands (Nominal diameter = 15.2 mm, Area = 140 mm²).
- Breaking Strength: 260.7 kN.
- Breaking Stress: Minimum of 1860 MPa.
- Young’s Modulus: 195.0 GPa as per § 4.6.2.1 of IRS-CBC.
- Sheathing: Corrugated HDPE ducts with specific diameter and wobble requirements.
Reinforcement Steel (REBARS):
- Grade: Fe-500D, conforming to IS 1786 and IRS-CBC.
- Young’s Modulus: 200,000 MPa.
- Yield Stress: 500 MPa.
- Density: 78.5 kN/m³.
Conclusion
These specifications are essential for ensuring the safety, durability, and efficiency of Delhi Metro Phase-IV. Adhering to these detailed guidelines will support the successful implementation of this significant infrastructure project.
I absolutely love your blog and find almost all of your post’s to be just what I’m looking for.Does one offer guest writers to write content for yourself?
I wouldn’t mind creating a post or elaborating on many of the subjects you write in relation to here.
Again, awesome web site!
Also vijsit my web blog; https://vavada.Webgarden.com/
[…] standards set by various national and international bodies. These standards cover aspects such as track design, signaling systems, and passenger safety protocols. Regular audits and inspections are conducted to […]
[…] adhesive tapes are available in rolls and are designed for quick application without specialized equipment. These tapes offer a service life of 3 to 6 […]
[…] trains are designed to float above the track, eliminating the need for wheels. By utilizing the principles of electromagnetism, they harness the […]
[…] Are Transition Curves?Transition curves are designed to gradually change the curvature of the track from a straight line (tangent) into a circular curve. This gradual change helps to reduce the […]
[…] objects, such as alignments or profiles, to specific boundaries or limits for better design accuracy and […]
[…] of traffic expected, and the terrain and urban constraints. Some critical aspects of portal beam design in Indian metros […]