Vehicle impact assessment of critical pipelines for Dukhan Facility – QP

Terms and response:

Workflow

• Software (FEM)
• Modelling
• Assigning Property
• Loads
• Analysis
• Remedies
• Summary report/Analysis report

Methodology:

• Input analysis and data validation
• Pipeline modelling with soil properties using FEM for locations
• Analysis of load on pipeline
• Vehicle Load Value implementation (with impact factor) based on the frequency of the Vehicle movement
• Model Simulation result analysis for various loads in different depth of the corridor
• Remedies (crash barriers, corrugated barriers, restraint systems, Speed Bumper etc)

Check list for site survey:

• Technical survey.
• Current Pipe condition.
• Exposed and buried pipe lines near to roads. (Distances and level of pipe)
• Frequency of vehicles. Statistical data pertaining to be analysed as part of study.

Analysis method using FEM

Input Required

• Soil test report.
• Seismic zones data.
• Shop drawings (ie)
  ▪ Location of pipeline
  • Pipe diameter and thickness
  • Levels of pipe
  • Material property
  • Thickness of soil bed
  • Width of the corridor
  • Longitudinal profile of corridor

Output

1. Measured Stress analysis compared to allowable stress.
2. Risk-based analysis and Remedies.