With the growth of individual construction, the owners of land plots encountered in practice a number of questions about which they had never or never heard, or have a vague idea about it. One of them is geological survey for construction works. Do they need to deal with and pay for this pretty solid money?
Why is this necessary?
The cost of the foundation for any construction is a very significant( sometimes up to 40%) part of all construction costs. There is no sense in explaining that the durability of the structure depends, first of all, on its reliability. But how much will it have to spend, given the prices of reinforcing bars and cement?
If the foundation is made massive, "in reserve", then such construction will cost "a pretty penny."Besides, how will the soil behave in this place? Will it not start to sag in due course from an excessive load? At the same time, unnecessary( and sometimes unjustified) savings will lead to the fact that the construction will not last long just because of the destruction of the base.
In addition, at the design stage it is necessary to determine the type of foundation. After all, he is selected "under" specific conditions. The most common form of it for low-rise construction is the belt. But it also has some limitations on the installation conditions, since the maintenance-free operation of such a foundation depends on the configuration of the underground aquifers, the depth of soil freezing and the like. In addition, you need to determine and with its deepening.
Some areas require additional soil reinforcement. To what extent, how to do it( methodology) - these and similar questions can be answered only by a professional.
There are a number of other issues on which it is difficult to make an independent decision. For example, what type of septic tank on this soil can be mounted, whether it is necessary to equip the drainage system of the site and many others.
It is clear that it is impossible to take into account and assess all the nuances of the preparatory measures independently. After all, it is necessary to analyze not only the results of studies of the soil samples obtained. In order to get the full picture, you need to study some archival materials. For example, seasonal fluctuations in temperature, changes in the depth of groundwater( and trend), as well as a number of specific data that are understood only by a professional. And it is also necessary to be able to make the right conclusion on their basis.
If to build "by eye", focusing only on the owners of adjacent sites, then there is a great risk that money, forces and time will be wasted, because in a short time interval will have to do major repairs, and the whole house. After all, if it "leads" the foundation, then this will affect the rest of the structural elements. Cracks in the walls, deformation( or destruction) of the rafter system, flooding the basement - all and not to list.
Therefore, there can be only one conclusion - for a small building( garage, shed, bath), you can limit yourself, for example, and a shallow, ribbon foundation, like neighbors. But if an apartment house is being built, then it is better not to neglect the services of professionals in the field of geological research.
Price of the issue
In order to give the reader a general idea of how much will be invested in the construction even prior to the start of the organization of the procurement of materials and the production of works, we will give an approximate price for research. It should be taken into account that not all specialized organizations that provide a similar service to the population carry out a whole range of activities. It includes not only purely mechanical work( excavation of soil), but also a number of others - laboratory studies and registration of all reporting documentation.
The price is largely determined by the depth and number of wells in a particular area.
- For 8-meter for 2 pcs.will have to pay about 33 000 rubles, for 3 pcs.- Thousand by 6 more.
- Drilling to a depth of 10 m costs for 2 pits - about 36 000 rubles, for 3 - from 40 000.
- 12-meter wells: 2 pcs.- from 40 000 rubles, 3 pcs.- from 50 000.
Practical recommendations of
If with the complex of activities related directly to the drilling process( its price) is more or less clear, then before entering into a contractwith the contractor organization, you need to immediately clarify what else is included in the cost of the work and how much will you have to pay in excess of this? The matter is that such points can then "float up" in the estimate, as the remoteness of the site, the drilling complexity factor and a number of others, which some Contractors initially "modestly" keep silent. Us, as the Customers, first of all the final sum of the prospective costs should be of interest.
By the way, such a component as laboratory research is one of the most expensive. Practice shows that it is more expedient to conclude a contract at once for the whole complex of necessary works from one Contractor, than to try to save and pay for their phased implementation by various structures.
On its site the owner can erect any structure. But it will not be registered as residential, unless a number of engineering communications necessary for life support have been brought to it. And this is already a somewhat different kind of work, for which there are prices, and payment for them is done separately.
For example, if there is a question about the gasification of the house, then the study of the ground under the route will cost from 25 to 45 thousand rubles. If necessary, the arrangement of the drainage system - about the same( based on 1 hectare of the area).If it is planned to build an artificial pond - about 1,500 rubles / m.
Based on this, it is worth to visit the offices of several organizations involved in geological research. For what?
Firstly, , find out how much the whole complex of necessary measures will cost and do they do it all?
Secondly, , to find out what discounts are provided in this organization, are the benefits provided for certain categories of citizens( for example, veterans of labor)?
Thirdly, , specify the deadlines for the completion of work and receipt of the completed documentation.
And only then, comparing the total amounts and temporary "parameters", we can conclude that it is advisable to conclude an agreement with a particular Contractor.
Probably, it makes no sense to explain, although it is worth recalling that it is necessary to make sure whether the given company has a license for this kind of activity and whether its expiration date has expired?
And one more thing that not everyone takes into account, but it seems to us important. Any specialized specialist will confirm that the motions of the soil, and consequently, the load on the foundation, are caused by a number of external factors. For example, laying next to a section of a highway or industrial pipeline, large-scale construction deployed nearby, are among them.
As any house is built for decades, this perspective should be envisaged. Any taxpayer can receive the necessary information under the law, without any restrictions. It is enough only to apply to the appropriate body dealing with issues of urban development in this territory. So you need to ask the Contractor whether its experts take it into account when preparing the final documentation, or will you have to find out this question yourself?
