Screw, Armco, Driven Cast-in-situ Piles

Piles

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Piles are used to build foundations for flexible and anchor-type pipe supports. Piles are made of pipes with the external diameter at 325, 426 or 377 mm with the minimal wall thickness at 7 mm (according to the GOST 10705-80, GOST 8732-80). Epoxy dual coating, standard for pile coating, is shop-applied. The type of the anticorrosive coat is agreed at order.

According to the penetration method, the following types of piles are distinguished:
   1. Armco pile is a one-piece or two-piece tube with a tapered tip welded onto the end;
   2. Driven cast-in-situ pile is a one-piece or two-piece tube with an elliptical tip welded onto the end. By agreement with the customer, the use of tapered tips for driven cast-in-situ piles is possible;
   3. Screw pile is a one-piece or two-piece tube with a pointed tip and a spiral blade welded onto it.

Due to the high bearing capacity, interturn ground intervals almost do not loose while screwing – on the contrary, they compact due to the blade, and the pile gets screwed into the ground like a screw. The pile gets screwed below the depth of frost penetration. After screwing piles are cut to the level, and a special bearing sleeve is welded onto the upper part of a pile to mount the foundation frame of the pipe support.