Modern Australian
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THE PROCESS OF INVESTIGATING SOIL AND ROCK PROPERTIES

  • Written by Modern Australian

Any civil engineering project must include a geotechnical investigation. It entails assessing and characterizing the qualities of the soil and rock there to guarantee the stability and safety of structures created on a site. In this post, we will cover the methods and approaches utilized in geotechnical research, site characterization, and the interpretation of geotechnical data.

Site investigation

The site exploration phase of a geotechnical engineering study is the first step. The geologists have to get samples of the soil and rocks, and this entails drilling boreholes or digging test pits. After getting the samples, they perform laboratory analysis to ascertain the mechanical and physical characteristics of the site. The characteristics at the site, such as the soil and rock types, the depth of exploration, and accessibility, will determine the type of drilling rig employed. But generally, an apparatus called a drilling rig—which may be mounted on a truck, trailer, or skid—is typically used for the drilling operation.

Evaluating the physical properties

After the soil and rock samples are taken, they are examined in a lab to ascertain their qualities. Standard laboratory tests are used to evaluate physical characteristics like density, porosity, and moisture content. On the other hand, specialized tests are used to measure mechanical qualities such as shear strength, compressibility, and permeability. The geologists then use the outcomes of these tests to create soil and rock profiles and design the foundation systems for structures that will be constructed on the site.

Characterizing the site

Site characterization is a crucial part of the geotechnical study. A thorough site examination is necessary to ascertain its geology, hydrologic, and geotechnical characteristics. Evaluating groundwater quality, seismic risk, slope stability, and underlying soil and rock strata are all part of characterizing a site. As you may already know, it is crucial to precisely identify the site for the structure to be erected on the site to be secure and safe.

Interpreting the data

Conducting a geotechnical investigation concludes with the interpretation of geotechnical data. It entails the analysis and synthesis of all the data gathered during site exploration and site characterization to create a thorough understanding of the soil and rock qualities at the site. Geologists may interpret geotechnical data in the following ways:

  • The construction of soil and rock profiles

  • Assessment of the foundation systems

  • Forecasting of soil and rock behavior under various loading circumstances.


Environmental considerations

The environmental effects of a project, including things like erosion, soil contamination, and groundwater pollution, must be considered during geotechnical assessments. Therefore, the inquiry process must be carefully planned and monitored.

Long term effect

The geotechnical investigation's long-term effects should also be taken into account. The inquiry's findings will influence not just the project's design and construction but also its long-term maintenance and upkeep. The investigation should therefore consider the project's long-term requirements and factors.

Affordability

Cost-effectiveness is another aspect. The required level of inquiry must be balanced with the project's budget because geotechnical investigation can be expensive. This necessitates in-depth knowledge of the project's possible hazards and difficulties and the site.

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