After the completion of drilling operations, it is necessary to make devices for the arrangement of wellheads. For this, cylinders are made from the roofing roofing material on the inner diameter of the hole with a length of about 250-300 mm. These devices will serve as formwork and casting guides. After that, the cylinders are inserted into the wells with their own hands.
The failure of the above formwork promises a lot of trouble in the form of leakage of concrete milk, increasing the roughness of the outer surface of the supports and the loss of strength of the pile tip. After the device heads are made and lowered into the well the reinforcement cage of the future columns. The skeleton is knitted with knitting wire, and it consists of 3-4 vertical rods of construction (8-12 mm) reinforcement, connected by transverse horizontal ties with a step of 0.5-0.6 m. (more…)