NH-21 & NH-205 with Major Bridges, Flyovers and Structures, Punjab, India

The project involved providing comprehensive Authority’s Engineer Consultancy Services to National Highways Authority of India (NHAI) for supervision of construction and maintenance of two major 4-laning highway projects in Punjab executed on EPC mode, with substantial involvement in supervision of bridges and structural works.

The consultancy services covered the following packages:

i) 4-Laning of Chandigarh – Kharar Section

From Sector 39 Roundabout, Chandigarh (Km 0.000)

To Kharar (Km 10.185)

On NH-21 & NH-95

ii) 4-Laning of Kharar – Kurali Section

From Km 15.765 to Km 29.900 (Design Chainages)

On NH-21 (New NH-205)

The assignment included detailed supervision and monitoring of all civil works with special emphasis on bridges, flyovers, viaducts, ROBs, underpasses, culverts, and associated structural components to ensure quality construction in conformity with EPC contract provisions and IRC/MORTH standards.

Important Technical Details

  • Total Project Length: 23.885 Km
  • Configuration: 4-Lane Highway (EPC Mode)
  • Major Structures Supervised:
  • One Major Elevated Flyover
  • Span Arrangement: 128 m x 25 m
  • Viaduct Length: 3.2 Km
  • Equivalent to 19.200 Single Lane Kilometers

Other Structures and Bridge Components:

  • Major and minor bridges
  • Vehicular underpasses (VUPs)
  • Pedestrian underpasses
  • Box culverts and pipe culverts
  • Retaining walls and RE walls
  • Drainage structures
  • Road over bridges / grade separators
  • Structural crash barriers and allied works
  • Scope of Authority’s Engineer Services for Structures:
  • Review and proof checking of structural designs and drawings
  • Supervision of bridge and flyover construction
  • Foundation and substructure inspection
  • Monitoring of piling, piers, bearings, and expansion joints
  • Superstructure casting and erection supervision
  • Quality control for concrete, reinforcement, and materials
  • Structural safety and stability checks
  • Certification of measurements and bills
  • Inspection during defect liability and maintenance period

Project Timeline:

  • Start of Services: May 2016
  • Completion of Construction Phase: November 2018 (as per Concession Agreement)
  • Completion of Maintenance Phase: November 2022 (as per Concession Agreement)

Special Highlights / USP

  • Prestigious Authority’s Engineer assignment for high-traffic urban and semi-urban corridors
  • Intensive supervision of a major 3.2 Km long elevated flyover/viaduct
  • End-to-end structural supervision from foundations to superstructure
  • Monitoring of multiple bridges, underpasses, and grade-separated structures
  • Implementation of stringent QA/QC procedures for structural works
  • Proof checking of contractor’s bridge designs and methodologies
  • Long-term involvement covering both construction and maintenance phases
  • Successful management of complex structural works in live traffic conditions
  • Significant contribution to improved safety, capacity, and connectivity in Punjab