BharatNet Phase II Scope
BharatNet Phase II aims to connect 600,000 villages with optical fiber backbone and last-mile connectivity. Civil scope includes trench excavation, duct laying, chamber construction, and restoration — representing one of India's largest telecom civil programs.
HDPE Conduit Method
HDPE duct (40/33mm) placed in 600mm deep trenches with 100mm sand bedding. Advantages: fiber can be blown/replaced without re-trenching, better protection in agricultural land. Standard for BharatNet backbone routes. Productivity: 800–1,200m/day with mechanical trencher.
Direct Burial Method
Armored or non-armored OFC laid directly in 900mm deep trenches with warning tape at 300mm. Used for last-mile drops and rocky terrain where duct is impractical. Requires careful backfilling in 150mm layers with compaction.
Soil-Type Recommendations
Sandy/alluvial: either method works; conduit preferred for maintainability. Black cotton soil: conduit with sand envelope prevents soil pressure on cable. Rocky: direct burial with rock cutting or HDD (horizontal directional drilling) for road crossings.
QA/QC Requirements
BBNL and BSNL specifications require daily trench depth checks, duct continuity testing (mandrel pull), chamber construction as per standard drawings, and GPS-based as-built route mapping. Sonil Buildcon executes BharatNet civil packages across MP with full documentation compliance.