What is a geotechnical study
When we talk about a geotechnical study, we are referring to an exhaustive investigation that aims to understand the properties and characteristics of the subsoil in a certain area or plot of land. Geotechnical studies are fundamental in the world of civil engineering and construction, since the viability and safety of any architectural project, from a simple home to the most complex infrastructure, largely depends on their analysis.
Geotechnics studies the mechanical, hydraulic and chemical properties of soil and rocks, as well as their behavior under the action of external forces.
Therefore, these studies become the cornerstone for determining how a structure will interact with the land on which it sits, anticipating possible problems and proposing solutions when building.
What is the purpose of a geotechnical study?
Why is it essential?
Geotechnics seeks to understand the terrain to the point of being able to predict its response to the different loads and conditions to which it will be subjected. An adequate geotechnical study will determine whether the soil is capable of supporting the load of a structure without unwanted settlements or collapses.
In addition, risks such as the possible presence of aquifers, erosion and the potential for liquefaction are studied, among others.
What is it for?
It also serves to design foundations appropriately, something crucial for the stability of constructions. On the other hand, with these studies, it is possible to evaluate the need to make improvements to the terrain or adopt specific structural designs that guarantee safety and durability to the work in the face of the unique challenges that each terrain presents.
Characteristics of the geotechnical study
The methodology
A geotechnical study is characterized by beginning with field work, where soundings, test pits or dynamic penetrations are carried out, among other exploration techniques.
These serve to extract samples that will then be thoroughly analyzed. Depending on the complexity of the project and the characteristics of the terrain, the methods differ both in depth and in the number of sampling points.
Analysis and results
After the field work, a laboratory phase follows where different tests are carried out with the objective of determining the physical and mechanical properties of the samples obtained.
These may include compressibility, permeability, shear strength and moisture content tests. Based on the results of these tests, a technical report is prepared that will provide crucial information for decision-making in the design of the work.
How much does a geotechnical study cost
The cost of a geotechnical study can vary significantly depending on a number of factors, such as the area of land to be explored, the geographic location of the site, the depth and type of analysis required, as well as the complexity of the terrain.
For example, in areas with a history of instability or geological complications, the study may require more advanced techniques and therefore be more expensive. Generally speaking, prices can range from a few thousand to tens of thousands of euros, depending on the particular project. Therefore, it is crucial to obtain detailed quotes from several service providers to ensure an optimal balance between cost and quality of the geotechnical study.
Applications of the geotechnical study
In structural design
Geotechnical studies are of particular relevance in the foundation design phase.
The data obtained allow the most suitable type of foundation to be chosen, whether shallow or deep, and to calculate the dimensions and load capacity that it must have to guarantee safety conditions.
In addition, these studies can indicate the need to include special structural elements such as piles, foundation slabs or diaphragm walls.
In risk analysis
Geotechnical study information is also essential for the analysis of geological risks such as landslides, differential settlements and subsidence. The knowledge obtained through these investigations helps mitigate or eliminate risks, ensuring that the design of the work addresses these issues in a preventive and appropriate manner.
The importance of Geotechnics
In short, a geotechnical study is that vital report that, based on a meticulous and scientific process, provides the necessary knowledge about the terrain that will receive a future construction.
With this study, engineers and architects manage to design safe and optimized structures that adapt to the unique characteristics of each soil and subsoil.
The Future of Geotechnics
The relevance of geotechnics in the construction process only increases with the passage of time. Facing challenges such as climate change, urban growth and the need to build on increasingly challenging terrain, geotechnical studies are positioned as fundamental tools for progress and innovation in modern engineering and construction.
With each study, the first and most essential lines are written of what will eventually become part of the landscape and infrastructure in which people’s daily lives take place.
