Tri-national Project to Produce Upgraded Rock Manual

New European standards for rock structures in coastal engineering projects have prompted the production of an updated rock manual. New European standards for rock structures in coastal engineering projects have prompted the production of an updated rock manual.
Industry Database

Three European countries - the UK, France and the Netherlands, are collaborating to produce an updated manual on the use of rock in hydraulic engineering.

The main aim of the project, which is receiving funding from the UK DTI Partners in Innovation Programme, DEFRA, and the Environment Agency, is to bring together all technical guidance for the use of rock in hydraulic engineering into a single document, and encourage the uptake of the information as widely as possible, both within the UK and beyond.

A number of publications on the use of rock in coastal and shoreline engineering already exist, such as the joint Dutch/ UK Manual on the use of rock in coastal and shoreline engineering , published in 1991 by CIRIA in the UK and its counterpart CUR in the Netherlands.

This publication included a new standard for rock gradings and test methods, new design formulae, and comprehensive coverage of all of the coastal engineering aspects of the use of rock, and was complemented by a CUR manual, Manual on the use of rock in Hydraulic Engineering , published in 1995 that re-used much of the joint CIRIA/CUR guide but also included guidance for structures in estuaries and river control.

However, as was explained in a recent paper by Jonathan Simm and Kirsty McConnell of HR Wallingford at the CoStructNet/ Beach Processes Network Workshop conference Beach Structure Interaction , a new European standard was published in 2002 that will be mandatory from June 2004, and the specifications in CIRIA/CUR 1991 can no longer be used.

The update for the manual that is now being prepared will incorporate new information, including the new European standard EN 13393 for Armourstone, and new research results on hydraulic performance, materials and construction aspects.

The manual will be extended to cover non-coastal aspects, recycled materials, and concrete armour units, and to include new approaches, including life-cycle based design to reduce costs, risk/ performance-based design, and new environmental requirements, such as the Habitats Directive.

The team preparing the updated manual includes members from CIRIA, Imperial College, HR Wallingford and Halcrow in the UK, CETMEF, CETE de Lyon and Sogreah in France, and the CUR, Rijkswaterstaat, Delft Hydraulics and Technical University of Delft in the Netherlands.

The document should be complete in March 2005, and will be published in September 2005 in English and in French, in hard copy and as a web-based PDF file.

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