Karstic phenomena

Specific sites have to be excluded where in case of earthquake the following occurrences may happen maximum ground acceleration incompatible with proven features of the design unacceptable karstic phenomena surface faulting hquefaction beyond the design capabilities. (It is observed that this criterion excludes particular sites having the possibility of movement of surface faults.)... 

The use of a base course reinforcement is also seen as a requirement for road construction on soft cohesive soils, weak collapsible soil, and in areas having underground cavities, whether of natural (Karstic phenomena) or anthropic origin (e.g. closed mines). 

This paper describes a design procedure for direct continuous foundation (slabs and footings) in clayey terrain with cavities and karstic phenomena situated at a certain depth. 

However, the phenomenon has not been classified as catastrophic due in part to the fact that the karstic dynamic in the area is slow because ... 

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