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Pipeline Crossing Assessment

Our engineers have have a wealth of experience undertaking pipeline crossing assessments, otherwise known as GM/1 or Pipeline-Soil-Interaction assessments, including for rail (HS2), roads and diversions. Where excessive stresses and deflections are predicted we have the knowledge and experience to provide cost effective engineering design solutions (e.g. piping arrangement modifications, additional supports, engineered backfill etc) to minimise disruption to the project schedule.​

Pipe Considered as a Ring (Hoop Response)​

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Used for calculating the circumferential stresses and strains in the cross-section of the pipe. The following all contribute to the pipe's response:​

 

  • Vertical soil load

  • Side fill

  • Passive soil support

  • Live loading

  • Bedding support

Pipe Considered as a Beam​

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Used for calculating the longitudinal stresses and strains in the pipeline sections. As with circumferential stress, a number of loads contribute to this response. Loads considered are:​

  • Internal pressure

  • Temperature

  • Construction techniques (including potential settlement)

  • External loads (e.g. traffic)

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