Engineering geology of the site for a cottage. The need for research, the order of their conduct

Disclose the pros and cons of any land that may affect the possibilities, timing and cost of the planned construction on it, you can by using the services of the company Guild Engineering. The firm conducts complex engineering surveys. Including studying and geology of the site .

Engineering geology of a site under a cottage.

Why is it necessary to study the geology of the site before the construction of the cottage?

 

Individual houses do not belong to the category of highly responsible buildings. Their weight and, accordingly, the load exerted on the underlying soils are comparatively small. As a result, a large percentage of developers believe that any soil, regardless of its density and strength properties, is certainly suitable for construction. And, consequently, there is no convincing reason for engineering-geological studies of the site. Agree with the fact that building a cottage, with a large desire, it will almost everywhere, perhaps, it is possible. However, in order to ensure the proper quality and durability of the building constructed in the difficult geology construction area, it will be necessary to shell out for very costly engineering activities. Depending on the nature of the problem that manifested itself during the construction, it can be:

 
       
  • a groundwater-lowering drainage system of horizontal or vertical type
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  • the silicization of unstable soils in the construction site
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  • Significant reinforcement of the foundation
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  • strengthening of the banks of water bodies, slopes of hills, etc.
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Harmful geological factors and related problems in the construction and operation of houses

 

The structure, mineralogical composition of soil in the land, hydrogeological conditions can vary widely. And geological studies often in time reveal such unpleasant for the builders features of the terrain:

 
       
  1. Inhomogeneous density of soils in the area where stable rocks are adjacent to much less strong (quicksand, subsidence, soluble, karsted, weathered soils). This heterogeneity leads to an uneven draft of the building, which causes a distortion of window and door openings, the appearance of cracks in the walls.
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  3. High groundwater level below the surface of the site. In water-saturated grounds, it is difficult to construct a foundation, underground communications, buried rooms.
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  5. Aggressive properties of groundwater in relation to building materials. Lead to the rapid failure of underground structures, pipelines.
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  7. Activity of dangerous processes. In the most critical conditions of the geology of the site, this can lead even to a sudden collapse of the building due to the descent of a landslide or the failure of an underground hollow formation.
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The procedure for studying the site for individual residential development

 

The system, developed as a result of many years of research experience, providing the most efficient process of studying the geology of the site, looks like this:

 
       
  1. Preliminary documentary research. At this stage, a general idea is formed about the geotechnical structure of the territory. At the address or cadastral number, the land plot is located on a geological map with the latest survey data. Sometimes it is also possible to find in the archive and a technical report with detailed information on the geology of the site located not far from the one that interests the customer.
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  3. Reconnaissance on site. Are revealed features of the terrain, signs of geological anomalies. Following the results of the reconnaissance, the points and volumes of the forthcoming drilling are specified, and access roads for engineering are planned.
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  5. Drilling operations. Engineering and geological wells are drilled to find out the soil section, select rock and hydrogeological samples, measure groundwater levels. The number and depth of wells required for qualitative geological surveys depend on local conditions, the shape of the projected building and are set individually for each project. Usually there are three or five wells for a single cottage on the site.
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  7. Laboratory tests. Analyzes of soil, groundwater; strength tests and other properties of samples taken during drilling operations are performed in special laboratory centers.
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  9. The final stage of the survey is the processing and generalization of field and laboratory materials, writing a report with the full (according to the technical assignment) characteristics of the geology of the site.
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