Vertical drains can be utilized in minimal permeability soils (clays, silts) and may appreciably boost the price of consolidation. Prefabricated vertical drains include a versatile plastic Main (flat or cylindrical in form) wrapped inside a spun-bond filter cloth and may be mounted to depths of much more than 50 m. https://franciscosgrc075308.activoblog.com/35509008/best-civil-engineering-services-bangladesh-an-overview