The choice for earth or sheet pile dike for flood prevention depends on a lot of factors. Will there also be a pump station? Is cost a driving factor? Do I have traffic to contend with and if so, how will it be handled?
For an earthen dike there are considerations such as sufficient space, loading of the soil and its affect on surrounding structure, is the dike likely to be swept away, could the water easily travel under the dike through the soil?
For a sheet pile dike there are factors such as is the soil suitable for driven piles, what height is required vs the embedment required?
Ultimately dike builders will often use a combination of the two systems depending on location, we’ve installed sheet pile dikes for bother the City of Surrey and the City of Richmond due to the flood prone nature of some of there areas.