PIPE SUPPORT & PROTECTION

Pipe Supports
Pipes on the seabed are prone to exposure often due to current erosion of sand and silt bed materials. Where monitoring shows the pipe free span to be exceeded, grout bag pipe supports can be readily installed by Divers in depths up to some 50m and by ROV beyond this depth.

Concrete pipe support trialInformation Required
• Pipe diameter (Ø)
• Underscour/ support height (H)
• Allowance free span
• Submerged pipe weight
• Soil type and ground bearing pressure
• Repair design life
• Estimated future scour potential

Support Types
Where the exposed seabed material is no longer prone to erosion, a simple pipe support block can be used. In the majority of cases, seabed erosion will continue to progress and support blocks with an anti-scour slab base are often used.

pipe support types

Supports need to be designed to distribute the pipe load safely onto the seabed without it becoming underscoured itself. The accelerated flow around exposed pipes to threaten underscour erosion. This effect needs to be considered along with general bed erosion or sand wave movement. Scour protection to pipe supports can commonly be provided by:- Anti Scour Slab, Flexible Edge Detail, Support Embedment and Rock Dumping. Due to the nature of seabed scour, an appropriate programme of inspection and necessary maintenance is usually advisable.

Proserve purpose manufacture pipe supports for their use and will design supports for load transfer. For scour protection issues, we are able to offer advice, generally without obligation, unless we are involved in the process of scour risk assessment.

Pipe Protection
Concrete mattress slabs cast in place over pipes provide effective protection from impact damage etc. Slab thickness can be selected to suit. A flexible edge detail can be used where scour is likely.

Large pipes, diffusers and pipe ends can be mass encased in concrete using a grout bag and temporary or lost mesh framework.

Pipe encasement by concrete

Past Projects

Pipe Protection (B167)

Mesh Support Frames (B172)