Before doing the foundation. As with their hands to determine the bearing capacity of soil

Private construction is now increasingly taking place in total savings mode. Instead, widespread earlier strip foundation do pile. Arrange melkozaglublennye tape instead be recessed below freezing. They refuse to geological surveys and build at your own risk.

The "old" spied a makeshift way to determine the bearing capacity of the soil by hand. Recommend it as a substitute for a full-fledged geology can not. But if you clearly decided not to order searches, you will be able to test yourself.

How to determine the bearing capacity of soil

Digging a trench or hole to a level are drilling penetration of the foundation.

In the valve pin or diameter of 10-16 mm is welded a small area for shipping. The pin rests on the ground and ground start load (add to prigruzami pad). Fix at a design load starts to sink into the ground.

To lock the movement set on the surface of a fixed support: pole, tripod, etc. It is convenient to record the movement of the laser level.

Measurements do at several points.

Determine the load bearing capacity as the load of the structure divided by the cross-sectional area, the pinch valves in the ground (studs). The calculation of the substitute load prior to the one at which the rod is pushed through the soil. We take into account the weight prigruza and fittings with a platform.

Example.

Weight fixture with a load - 9kg.

The cross sectional area of ​​reinforcement Feeder # 10 mm - 0.785 cm2 (on the table or the formula: 3.14 times the radius squared).

9 kg / cm2 = 0.785 11.4 kg / cm2

How to determine whether the construction of the ground stand

SNIP forward load, which will operate on the ground. It is necessary to take into account the permanent and temporary loads on each element.

To roughly estimate the load, add up the weight of all structures: walls (including plasters), floors (including design sex), the roof (covering, roof, insulation), etc. When it comes to the stone building, the result is multiplied by two. This will allow for temporary load and safety factors.

We calculate the area of ​​support on the ground. For this tape strip foundation area. For the pile - a work area of ​​a pile on their number.

Divide the weight of construction on the foundation area.

For example, the gained weight of 15 000 kg basement area 1800 cm2.

15,000 kg / cm2 = 1800, 8.3 kg / cm2

In this case, the load on the structure (8,3) is smaller than the bearing capacity of the soil (11,4). We can say that the base stand.

In this way large errors. You can use it for hozpostroek, porches, arbors, etc. In the case of building a house, you can check yourself if before that uniquely decided not to order the geology. The soil has been inspected even when the self-determination of the bearing capacity - go to the geologists and designers!

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