A soil study is the first step towards the implementation of any successful construction project, as it depends on the selection of the appropriate foundations and ensuring the long-term safety of the building. This is where the Soil Lab comes in, which conducts the necessary tests to assess the soil’s ability to withstand loads and detect any issues that may affect the stability of the facility in the future.

Soil analysis may seem like an additional pre-construction procedure, but it is actually an investment that protects the project from costly mistakes such as subsidence, cracks, and weak foundations. Therefore, pre-construction soil inspection is one of the most important pre-construction stages.

In this guide, you will learn about the concept of a soil laboratory, the most important tests it conducts, how the soil analysis process is carried out, in addition to the cost of the test, the duration of its completion, the way to read the soil report, and the most important criteria that help you choose the right laboratory for your project.

What is a Soil Laboratory?

The Turbah Laboratory is defined as an engineering facility specialized in the study and analysis of soil properties through a set of field and laboratory tests carried out by specialized engineers and technicians using precise and certified instruments.

The laboratory aims to determine the suitability of the soil for the construction of various facilities, and to provide accurate scientific data that the structural engineer relies on in designing foundations and choosing appropriate solutions for the nature of the site.

The role of the laboratory is not limited to mega projects, but also includes residential buildings, villas, commercial complexes, hospitals, roads, bridges, and industrial and agricultural projects.

What role does a soil analysis laboratory play?

The Soil Analysis Laboratory performs a wide range of engineering tasks, the most prominent of which are:

• Study the nature of the site before starting implementation.
• Carrying out soil probes to determine the layers of the earth.
• Collect samples in a correct geometric manner.
• Perform physical, mechanical, and chemical tests.
• Measure soil tolerance.
• Determining the level of groundwater.
• Assessing the likelihood of future declines.
• Issue an integrated engineering report that includes the results and recommendations.

This report is one of the most important documents that the designer engineer relies on when choosing the type of foundations, whether they are separate bases, common bases, labs, or piles.

Why should you rely on an accredited laboratory?

Choosing a soil lab Certified is an essential step to ensure accurate and reliable results that can be relied upon in the design and implementation of the project. The accredited laboratories are committed to the application of recognized engineering specifications and codes, and use state-of-the-art equipment that is calibrated periodically to ensure the accuracy of measurements. They also include teams of specialized engineers and technicians who are able to analyze the results and provide engineering recommendations that are appropriate to the nature of the soil and the project. In addition, these laboratories issue professional reports approved by the competent authorities, with strict quality control procedures, which reduces the likelihood of errors and gives project owners greater confidence in construction decisions based on inspection results.

What types of tests does a soil lab perform?

Tests conducted within the laboratory vary according to the type of project and the nature of the site, and usually include:

• Soil Physical Properties Tests.
• Density and humidity tests.
• Shear resistance tests.
• Compression and subsidence tests.
• Granular analysis test.
• Permeability tests.
• Chemical tests.
• Soil tolerance tests.

The appropriate tests are selected based on the results of the soil probes and the requirements of the project, so that the engineer gets a comprehensive picture of the properties and behavior of the soil under different loads.

Why is soil analysis important before construction?

The ground may look firm and solid when viewed from the surface, but the reality below it may be very different. That’s why soil analysis is one of the first steps before any construction project, revealing the true properties of the soil and giving engineers the information they need to make sound design decisions.

Engineering experience indicates that a large percentage of building problems are due to poor soil study or failure to conduct soil testing before construction properly.

Protect buildings from subsidence and cracks

Buildings are exposed to large loads that are completely transferred to the soil through the foundations. If the soil is unable to withstand these loads, irregular subsidence may occur that leads to:

• Cracks in the walls.
• Milan parts of the building.
• Damage to the floors.
• Weak structural elements.
• Reduced building lifespan.

Soil testing reveals the soil’s ability to withstand these loads before implementation begins, significantly reducing these risks.

Choosing the Right Foundation Type

There is no one-size-fits-all rule for all types of soils, as each site has different characteristics that necessitate appropriate structural solutions.

For example:

• Rocky soils may be suited to surface foundations.
• Sandy soils need to assess the degree of density.
• Clay soils may require special solutions due to shrinkage and bulging.
• Weak soils may call for the use of piles or soil improvement.

For this reason, the structural engineer relies directly on the results of the soil report when designing foundations.

Reduce future risks

The Turbah Lab helps detect many problems before starting a project, such as:

• Rising groundwater levels.
• The presence of voids within the soil.
• Soil that is collapse.
• Organic soil.
• Swollen soil.
• Salts and harmful chemicals.

Knowing these issues early gives the design team an opportunity to develop appropriate solutions before the project is implemented.

Reduce maintenance and repair costs

The cost of soil testing may seem like an additional burden at the beginning of the project, but it is actually an investment that will save significant amounts in the future.

Early detection of problems reduces the likelihood of:

• Re-implementation of foundations.
• Repair cracks.
• Landing processing.
• Replacement of damaged structural parts.
• The project was halted due to design errors.

Engineers therefore view the study of soil as a preventative step that protects the project and lowers long-term operating and maintenance costs.

Adherence to the building code and engineering requirements

Many codes and regulators require soil testing before construction, especially in commercial and industrial projects and multi-story buildings.

This requirement is intended to ensure that the structural design is based on factual and accurate data, and not on assumptions that may affect the safety of the building or its users.

The soil report also helps regulatory and consulting bodies review the design and ensure that it complies with safety and quality requirements.

How is soil analyzed?

The soil is analyzed according to a series of engineering steps that aim to assess the characteristics of the site and provide accurate recommendations for the design of the foundations. Although the details of the work vary according to the nature of the project, the basic phases include the following:

• Site Visit and Implementation of Sensors

The Turba Lab team begins by inspecting the site and determining the locations and number of soil probes according to the land area and the type of project. The probes are then carried out to reach the different layers, measure the groundwater level, and collect raw data on the soil.

• Sampling and transporting them to the laboratory

After the completion of the probes, soil samples are collected from different depths, while preserving their natural properties, and then transferred to the soil analysis laboratory for the necessary tests according to precise engineering standards.

• Conducting laboratory tests

A range of tests are performed to determine the most important properties of the soil, such as moisture content, density, granular analysis, shear resistance, compaction, and permeability, as well as some chemical tests when required.

• Analysis of results and preparation of the report

Geotechnical engineers analyze the results of the soil test and prepare a soil report, which includes a description of soil layers, tolerance, and groundwater level, as well as engineering recommendations and the type of foundation suitable for the project.

Top Tests Conducted by the Soil Laboratory

The Turba Laboratory conducts a series of laboratory and field tests to assess the properties of the soil and its suitability for construction, and the engineer selects the appropriate tests according to the nature of the project and the type of soil. The most prominent of these tests are:

• Moisture Test: Measures the amount of water in the soil, and helps assess soil resistance and the quality of compaction work.

• Density test: Determines the density of the soil as normal or after compaction, to ensure that it can withstand loads and the foundation is stable.

• Atterberg Boundary Test: Used to evaluate the behavior of clay soils and measure their susceptibility to expansion or contraction.

• Shear Resistance Test: Measures soil resistance to slipping, and is one of the basic tests in the design of foundations and retaining walls.

• Compression test: Determines the amount of soil subsidence expected under the loads of the building, helping to avoid future structural problems.

• Granular Analysis Test: It classifies the soil according to the size of the grains, such as sandy, clayey, or gravel soils, and is one of the most important tests in geotechnical studies.

• Permeability Test: Measures the speed at which water passes through the soil, and is used in the design of drainage systems and foundations exposed to groundwater.

• Soil Tolerance Test: Determines the maximum load that the soil can safely withstand, and is one of the most important results that an engineer relies on in the design of foundations.

• Chemical Tests: Measurement of the percentage of sulfates, chlorides, pH and dissolved salts, with the aim of assessing the impact of soil on concrete and rebar and selecting appropriate means of protection.

How much does soil analysis cost?

There is no fixed cost for a soil analysis service, as it varies from project to project depending on a range of technical factors. Although some consider soil testing to be an additional cost, it is actually an important investment that helps avoid construction issues and future repair costs.

Factors Affecting the Cost of Soil Analysis

• Land area: The larger the site area, the more soil probes need to be performed to get accurate results.
• Number and depth of probes: The price of the study increases as the number of probes increases or the need to drill to greater depths.
• Project Type: Soil study requirements vary between residential, commercial, industrial, and infrastructure projects, with larger or more complex projects needing additional testing and studies.
• Location: The nature of the site and its accessibility may affect the cost of carrying out the inspection work.
• Type of tests required: The price also depends on the number and type of laboratory and field tests needed, such as density, compression, permeability, and chemical tests.

Can a fixed price be set?

It is not possible to set a uniform price for all projects, as each site has its own conditions and requirements. Therefore, it is advisable to contact a specialized soil laboratory to conduct an initial assessment and determine the scope of work, and then submit a quote that suits the needs of the project.

How long does it take to check the soil?

The duration of the soil test depends on the size of the project, the number of soil probes, the nature of the site, and the type of tests required. The process includes three main stages:

• Performing probes and sampling

The study begins with the implementation of probes and the collection of samples from different depths, and the duration of this phase varies according to the number and depth of the probes and the nature of the soil.

• Conducting laboratory tests

Samples are transported to the soil analysis laboratory for necessary tests, such as density, moisture, compactness, and permeability tests, and the duration varies depending on the type and number of tests.

• Preparation of the Engineering Report

After analyzing the results, the engineers prepare a soil report that includes soil characteristics, tolerance, and recommendations for the appropriate type of foundation for the project.

Note: The duration of the report may be affected by factors such as the increase in the number of plasters, the complexity of the nature of the soil, or the need for additional tests, so it is advisable to coordinate with the laboratory before starting the project to avoid any delays.

How do you read a soil analysis report?

A soil report is the primary reference that a structural engineer relies on when designing foundations, and usually includes the following most important data:

• Site Description: Includes project information, number of sensors, and locations.
• Soil layers: Shows the type, characteristics, and depth of each layer.
• Groundwater level: Determines the water level and its impact on the implementation works.
• Soil Tolerance: Indicates the loads that the soil can safely withstand.
• Engineering Recommendations: Includes the type of foundation proposed, the level of establishment, and any treatments or precautions required prior to implementation.

How to choose the best soil lab?

Choosing a specialized soil lab ensures accurate and reliable results in the design of the project. When comparing laboratories, make sure to consider the following criteria:

• Accreditation and official licensing.
• Expertise of Geotechnical Engineers.
• Use of modern and calibrated devices.
• Accuracy and speed of reporting.
• Good reputation and previous business.
• Quality customer service and technical support.

Choosing a laboratory with expertise and technical capabilities contributes to reducing risks, making sound construction decisions, and ensuring that the project is executed according to the highest quality standards.

Frequently Asked Questions

• How much does soil analysis cost?

The cost of soil analysis varies according to the area of the land, the number and depth of the probes, the type of project, and the tests required, so there is no fixed price that suits all projects.

• How is soil analyzed?

The process begins with a site visit and soil testing, then sampling and laboratory tests, and finally preparing a soil report that includes engineering results and recommendations.

• How long does it take to check the soil?

The duration depends on the size of the project, the number of probes, and the type of tests, and may vary from project to project depending on the nature of the site and the requirements of the study.

• Is soil analysis mandatory before construction?

In many projects, pre-construction soil testing is a prerequisite according to codes and regulators, as it plays a role in ensuring the safety of the facility.

• What is the difference between soil testing and soil testing?

Soil probes are the process of excavating and collecting samples from a site, while soil testing includes probes, laboratory tests, analysis of results, and the issuance of an engineering report.

• What happens if construction is done without a soil analysis?

This can lead to the selection of improper foundations, the occurrence of subsidence or cracks in the building, and the high costs of maintenance and repair in the future.

• How many palses are required for a plot?

The number of probes depends on the land area, the type of project, and the requirements of the engineering code, and is determined by the geotechnical engineer after studying the site.

Conclusion

Relying on a specialized soil lab is an essential step to ensure the success of any construction project, as it provides accurate information about soil properties and its ability to withstand loads, helping in choosing the right foundations, reducing risk, and reducing maintenance and repair costs in the long term.

If you are looking for a reliable engineering partner to conduct soil analysis andsoil testing before construction, DEDA provides integrated services that include the implementation of soil probes, conducting laboratory tests, issuing accurate engineering reports, as well as providing technical consultations by a team of specialized engineers using the latest equipment. Contact DEDA today to get accurate results, speed of completion, and engineering solutions that support the success of your project from the start.