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Micropiles - Minipiles

Micropiles are small diameter drilled and grouted friction piles. Each pile includes steel elements that are bonded into the bearing soil or rock - usually with cement grout. The bearing stratum is logged during installation drilling to assure that bearing capacity is adequate. Micropiles do not rely on end-bearing capacity, so there is no need to establish the competency of rock beyond bond-depth. They can be installed quickly in virtually every type of ground using highly adaptable mobile drilling equipment. These steel piles have working capacities up to 250 tons.

Zemin Arastirma Corp. uses micropiles (minipiles) as an economical alternative to large diameter drilled shaft foundations, especially in difficult ground conditions, karst geology, or restricted access situations.

Micropiles - Minipiles Setup Sequence:

Drilled into bedrock, micropiles or minipiles bond to the rock socket wall for load transfer. The casings of the minipiles are advanced as piles are drilled into site's bedrock.

Drill pipe is removed, which leaves casing for mini or micro piles setting in bedrock. A reinforcement load bar is lowered into casings of the micro piles, for added capacity. Cementitious grout is pumped or pressure feed into the minipiles casings, bottom up. The casings for the micro piles are lifted to top of bedrock, allows bonding to the bar. Excess steel is cut from the tops of micropiles; piles are capped to engineer's design. A select number of piles are load tested to prove the engineering load design.
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