Vertical drains can be utilized in small permeability soils (clays, silts) and may drastically raise the price of consolidation. Prefabricated vertical drains consist of a versatile plastic core (flat or cylindrical in form) wrapped in the spun-bond filter cloth and can be set up to depths of over fifty m. https://emilianojwhvk.iyublog.com/32337989/the-best-side-of-top-engineering-companies-in-bd