The construction of any safe and robust building actually starts even before beginning the construction process on the ground. The process involved in investigating the site and designing the foundation for the building is an engineering process that helps ensure buildings are sound, efficient, and adapted to the nature of the land.
This guide covers the entire workflow process and explains the importance of each one of the steps involved in this process.
*1. Site Reconnaissance and Initial Assessment
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The first step involves an elementary investigation, which comprises a visual assessment and examination of the property. Engineers look at the nature of the surfaces, accessibility, buildings around, and even soil stability.
In this phase, the intention is to assess if the site can be investigated further or not.
*2. Desk Study and Data Gathering
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Prior to beginning fieldwork, the engineers collect information regarding the history and environment of the site. This can include:
• Historical use of the site
• Geology mapping
• Flood history
• Construction nearby
• Environmental considerations
All of this helps the engineers develop an idea of what the site conditions might be like underground.
*3. Detailed Geotechnical Investigation
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It is considered one of the most important phases throughout the process. Drilling boreholes, sampling the soil, and conducting field tests like the standard penetration test (SPT) is done at this stage.
Laboratory testing determines:
• Soil strength and density
• Water content
• Bearing capacity
• Classification of the soil
All these findings influence the behavior of the soil when subjected to loads. The availability of geotechnical services, as offered by Enviro Test Construct is very important during this stage.
*4. Soil Behavior Pattern Determination
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After conducting soil testing, engineers conduct a review of the findings to establish any patterns in the soil behavior and risks. It helps to ascertain whether shallow foundations are sufficient or deep foundations will be needed.
Main issues here include:
• Risks of settlements
• Load-bearing capacity
• Groundwater
• Soil variability at the site.
*5. Choosing a Type of Foundation
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Engineers select the appropriate type of foundation depending on the results obtained from the soil report. The common types of foundations include:
• Shallow foundations such as spread footing and strip foundations
• Raft foundations
• Deep foundations like piles and caissons
This decision will be influenced by load considerations as well as the characteristics of the soil in question.
*6. Foundation Structural Design
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Following the choice of foundation, engineers undertake the detailed design of the foundation. Calculations of loads, reinforcement and other safety parameters have to be done.
The design will be done considering building code guidelines to ensure durability.
*7. Evaluation, Approval, and Implementation of Geotechnical Design
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Upon completion of design, it goes through evaluation and approval processes. Following approval, the design is implemented.
Monitoring of construction process is important during the implementation phase.
*Best Practices within Industry
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In order to achieve success, the following practices should be adhered to:
• Perform extensive site investigation before designing
• Employ accredited laboratories to perform soil testing
• Do not make presumptions about the condition of the ground
• Combine geotechnical and structural engineering consultants
• Keep accurate records throughout the process.
*Conclusion
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It goes without saying that the process from performing site investigation to designing the foundations is vital and essential in building construction because all subsequent stages will be built upon it.
A thorough and professional examination can prevent many problems and save a considerable amount of time and money spent on unnecessary corrections.
For further information on geotechnical investigations and other related services provided by Enviro Test Construct
#construction #engineering #siteassessment #siteinvestigation
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