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Construction.pptx

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National highways construction involves three main phases: preconstruction, construction, and post-construction. Preconstruction includes appointing design, proof, and safety consultants to develop drawings and plans. During construction, embankments and subgrades are constructed with at least 95% compaction and specific material requirements. Private companies and the authority's engineer/PMC both oversee construction execution, quality control, design, planning, safety, billing, and supply chain management.

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NATIONAL HIGHWAYS
CONSTRUCTION ACTIVITITES PRECONSTRUCTION DURING CONSTRUCTION POST CONSTRUCTION
PRECONSTRUCTION  Appointment of Design Consultant • Design & Drawings • Plan & Profile •GAD & Design Reports of Structures (Pipe Culverts/Box Culverts/ VUP/ CUP/ MJP/ MNB/ ROB/RUB •Signage Plan •Other Drawings (Bus/Truck Bay & Shelter, Toll Plaza etc.)  Appointment of Proof Consultant  Appointment of Safety Consultant
DURING CONSTRUCTION ACTIVITIES
EMBANKMENT & SUBGRADE CONSTRUCTION •Requirement 95% compaction just below the 500mm thick sub grade layer. LL 50% PI 25% •Avoid use of heavy clays/ black cotton soil in embankment. As it gets very weak on wetting. •The top soil in 1.0 m depth of embankment should be replaced with non-cohesive soil or should be improved by stabilization. Sr. No. Type of work / material Relative compaction as percentage of max. laboratory dry density as per IS 2720 (part 8) 1 Sub grade and earthen shoulders Not less than 97% 2 Embankment Not less than 95% Compaction requirement for embankment and sub grade
 PRIVATE COMPANIES FOR -  AUTHORITY’S ENGINEER / PMC - Execution - Quality - Design - Planning - Safety - Billing - SCM - Execution - Quality - Design - Planning - Safety - Billing

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Construction.pptx

  • 3. PRECONSTRUCTION  Appointment of Design Consultant • Design & Drawings • Plan & Profile •GAD & Design Reports of Structures (Pipe Culverts/Box Culverts/ VUP/ CUP/ MJP/ MNB/ ROB/RUB •Signage Plan •Other Drawings (Bus/Truck Bay & Shelter, Toll Plaza etc.)  Appointment of Proof Consultant  Appointment of Safety Consultant
  • 5. EMBANKMENT & SUBGRADE CONSTRUCTION •Requirement 95% compaction just below the 500mm thick sub grade layer. LL 50% PI 25% •Avoid use of heavy clays/ black cotton soil in embankment. As it gets very weak on wetting. •The top soil in 1.0 m depth of embankment should be replaced with non-cohesive soil or should be improved by stabilization. Sr. No. Type of work / material Relative compaction as percentage of max. laboratory dry density as per IS 2720 (part 8) 1 Sub grade and earthen shoulders Not less than 97% 2 Embankment Not less than 95% Compaction requirement for embankment and sub grade
  • 6.  PRIVATE COMPANIES FOR -  AUTHORITY’S ENGINEER / PMC - Execution - Quality - Design - Planning - Safety - Billing - SCM - Execution - Quality - Design - Planning - Safety - Billing