The foundation is a type of deep foundation shafts are castled on the right by using the components and cut stone as its content, Called sinks because it begins with the excavation of foundation soil 60-80 cm in diameter, such as digging wells. Sinks into the foundation can reach 8 m. At the top of the foundation which approximates Sloof, used a bit of refraction. This type of foundation is used when the construction site far enough away and not allowed transporting freight pencang pole. Only this type of foundation is very rarely used. Besides lavish concrete mortar, concrete casting results ina place that in too difficult to control.

a. How to calculate the volume of concrete
How to calculate the volume of concrete for the foundation of this type is a circle multiplied by the formula in, i.e.

V = 3.14 x r2 x t

Description:

r: the radius of the circle wells
t: depth of foundation
V: volume

b. Calculate the material needs
Supplies materials for volume 1 m3 of foundation wells with a mortar cement: 2 sand: 3 splits on the foundation of reinforced concrete in the upper part is

1. Crushed stone / split 2 / 3 as much as 0.83 m3

2. 0.54 m3 of concrete sand

3. PC as much as 8.5 bags of cement

For the needs of iron, made a sketch or drawing a circle and then searched around (2 x 3.14 x diameter circle) and for iron with the distance (usually 15-20 cm), then multiplied by its concrete foundation.

This article continues the article “Foundation Sinks Part 2″