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The Code of Practice for earth-retaining structures, BS8002, was published by the British Standards Institution in 1994, over 40 years after the first Code, CP2. This paper provides an overview of the new Code and a guide to its application.
Mr D. W. Wood (Sir Alexander Gibb & Partners)
I wish to concentrate on two major areas. First, would the CDM Regulations have made a major impact on how you proceeded? Secondly, you said that the design evolved and then you implemented the changes. Can you explain the magnitude of the changes? Did you rip things out completely and start again or were they minor changes?
The safe and economic design of a retaining wall depends on the appropriate mobilisation of strength in the adjacent soil. Dense soil tends to be brittle, so that it loses its strength even under strains compatible with the expected displacement of walls. Loose soil tends to be so compliant that it fails to fully develop its available strength. These two concerns are central to the new design methodology adopted by BS8002 Code of practice for earth-retaining structures.