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INFORMATION REQUIRED BY SSCS FOR SCOUR CONTROL PROJECT LAYOUT
If required we are Pleased to prepare a full techincal response to an enquiry at competitive rates but we need as much guidance as is possible on the queries listed below for each specific site:
- Storm Waves:
(A) 10 year and Annual storm wave height, crest to trough (hc) at site of the structure, wellhead or pipline/outfall, or your best estimate; and (B) 50 year storm wave height, or best estimate.
- Tidal Flow:
True Directions and Strengths of max. tidal flow at Springs and of any currents at the site.
- Drawings:
(A) If relevant the Plan Drawing layout showing orientation and spacing of any wellhead, steel structure, footings, bridge piers or jetty and size and weightcoating of any pipeline; (B) if there are horizontal members or structures close to the seabed an Elevation Drawing that shows these (and their vertical positions - where applicable). seabed slope is also important.
- Seabed:
Composition at the site: is possible by layer depth to cover at last the top 10m of depth below the seabed surface. Obviously we much prefer particulate sizes, mix and soil description but ANY information is better than none.
- Depth:
Depth of water (LAT) at the site, or depths along the length of the structure / pipeline route and Spring Tidal Height.
- Existing Scour:
Position, length, width and depth below surrounding seabed (or original seabed level) of any existing scour pits on site. In the case of pipelines the depth of the scour pits below the top of the pipleline is also essential. From the above we are able to deduce:
(A) the approximate proncipal inclination of storm waves to a structure, pipeline, outfall or a wellhead structure; (B) direction of all tidal and current flow relative to site; (C) whether the spacing or shape of any structure / footings is such that it / they themselves cause hydrodynamic interaction which must then be taken into account; (D) susceptibility of the seabed to scour and size of any scour pits in existence; (E) hold down / edge stability requirements; (F) estimate sinkage probability and rate; and (G) determine optimum product type, general layout requirements and estimated quantities.
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