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Prefabricated Vertical Drains (PVD) with temporary surcharge are utilised as ground treatment method to expedite the dissipation of excess pore water pressure generated from filling works of building platform level and to eliminate the long term
In rotary drilling method, a cutting bit is attached to a hollow drill rod rotated rapidly by an engine driven rotary table. Either water or a suspension of colloidal clay is pumped down the drill pipe, flows through opennings in the bit and transports the loosened materials to the surface. The clay suspensions are designed…