In fairness, it is worth noting that it is not easy to calculate the foundation of the pit. Even for those who studied perfectly. Therefore, of course, it is advisable to seek help from professionals.
Well, if you still want to conduct calculations yourself, you will have to call for the help of the formulas.
Before starting calculations, it is necessary to inspect the territory on which the pit itself will be. It is necessary to take into account all the irregularities and their sizes. Thanks to this, you can calculate the percentage of error.
The calculation itself consists of determining various geometric figures. To determine the parties to the pit to help, there is such a formula: a1 = a+2nt B1 = B+2NT
And and on this side of the foundation of the pit; H depth; T – slope coefficient.
Determination of the underground part
To determine the part that is underground, use the formulas from the school course. Then the volume of falling asleep between the foundation and the slopes of the pit is calculated. They correspond to the difference between the volume of the foundation pit and the underground structure itself. In this case, the exact measurement of the future underground part of the structure will lead to a lower error.
Determination of soil volume
In order to determine the volume of the soil, it is necessary to take the dimensions of the pit and using the formula to conduct calculations: V = h 6
Ribbon foundations
If you need a jacket of large length (strip) and at the same time differ almost twice, or even more and moreover, there is still an uneven relief? How to calculate the volume of the pit? In this case, the method of transverse sections is used.
It is based on the fact that the area of the pit is divided into parts with vertical planes at the points of the break. The total volume will consist of the sum of the volumes of all individual parts. And each volume is considered according to the formula:
V1 = LI or VI = FSR./Li
where: F1, FI+1 – trapezoids; FSR – middle area; Li is the length.
Pleasant calculations to you.