How to make a personal pier foundation raft with only 80 000 rubles
Author of the article and photo: Sergey Smirnov
The foundation was built for 2 weeks, not counting days on concrete grasp and 80 m. P. together with the works.
I'll tell you about the foundation. I have not been heaving soils and it was decided to build a pier foundation with a simple raft.
The work was carried out by two workers Tajiks and led them Russian foreman. It was first produced marking work, according to my project and began collaring holes diameter 300 mm depth 1m 80 cm. Drilled ordinary hand drill.
The number of holes - 33. While Tajiks drilled, Brigadier cooked triangular design of the valves. In each of the openings pour 5 cm cushion sand, roofing material and then inserted from the ring to at pouring cement least gone "milk" is inserted reinforcing structure, which should be 40 cm above the column.
Fill the hole with concrete. Then a ring of roofing material paste, prepared beforehand segment gypsum cement pipe diameter
300mm and long 400 mm. Fill tube to fill with concrete and set the horizontal level and height - 30 cm. Reserve columns until the solution is completely set.Then covered with sand pillars, took 2 KAMAZ, and build a grillage formwork. With spacers, etc. The shuttering laid roofing felt, why? You will understand later. Then order a concrete mixer, on my raft foundation took about 14 cubes.
After solidification of the concrete and disassembling the formwork, roofing felt was wrapped on grillage later was wrapped waterproofing and pasted by using a gas burner.