Underground Metro Dismantling Works

Onyx Engineering delivers safe, efficient dismantling solutions that minimize disruption, protect the public, and manage disruption-era liabilities. Our scope covers project scoping, risk assessment, decommissioning of tunnels and stations, soil and groundwater protection, hazardous material handling, and site restoration. We apply rigorous safety management, environmental controls, and waste diversion practices aligned with ISO 9001:2015 and ISO 45001:2018 to ensure compliant execution from initial planning through final handover.

Controlled Underground Dismantling

Onyx Engineering provides end-to-end underground metro dismantling—from planning and risk assessment to decommissioning, remediation, and site restoration. Our disciplined processes, safety culture, and environmental controls minimize disruption and deliver compliant, responsible project closeout.

3) Service framing

• Sectors served: legacy metro lines, urban rail corridors, depot and tunnel infrastructure, and phased decommissioning programs
• Core methods: asset inventory, risk-based dismantling planning, hazardous material management, excavation and spoil handling, soil/groundwater protection, and site restoration
• Project lifecycle: feasibility → due diligence → decommissioning design → phased dismantling → decontamination and remediation → site restoration → handover → lifecycle support
• Safety and compliance: ISO 9001 QMS and ISO 45001 OH&S, regulatory permits, rail safety standards, and QA inspections
• Value for clients: reduced disruption, liability minimization, controlled deconstruction waste, and clear regulatory compliance documentation

Practical safety and quality checklis

• Pre-dismantling planning
  • Define scope, radiological/hazardous material considerations, and performance criteria
  • Develop decommissioning sequence, isolation plans, and waste management strategy
  • Stakeholder coordination, public safety plans, and emergency response preparation
• Design and permitting coordination
  • Align with rail authorities, environmental regulators, and utility owners
  • Plan decontamination, ventilation controls, and soil/groundwater protection measures
• Dismantling execution
  • Implement controlled demolition sequencing; monitor dust, vibration, and groundwater ingress
  • Manage removal of hazardous materials; document chain-of-custody for wastes
• Site restoration and handover
  • Conduct soil remediation, reinstate surface topography, and reseed or repave as needed
  • Provide as-built records, waste transfer documentation, and post-closure support

• Underground Metro Dismantling Works | Safe Decommissioning by Onyx Engineering
• Onyx Engineering delivers end-to-end underground metro dismantling—from planning and hazardous-material handling to phased decommissioning and site restoration. ISO-aligned quality and safety ensure compliant, responsible project closeout.