Subgrade and Foundation Systems

Precision. Strength. Built to Last.

In any build, the most important considerations begin with what lies beneath the surface. The soil conditions and a proper foundation design for those conditions are the backbone of your build. Without it, you risk everything you are planning to build on top of it. The quality of your soil remediation and foundation design directly correlates to the lifespans of concrete slabs, the surfaces you install, and the overall performance of the fields of play you are building.
Winplus Sport understands this and employs the services of international geotechnical engineers who specialize in this to ensure your build is the best quality with the longest lifespans.

Concrete Slabs for Sports Courts

The ultimate variable in any build tends to be the soil conditions. It is extremely important to evaluate the soil through drilling and sampling, and have it lab tested to provide a detailed analysis of the soil types, compacted strength, grain sizes, drainage, and moisture of the soils underlying your build. These tests include:

Soil Boring and Sampling

  • Standard Penetration Test (SPT): Measures soil resistance to penetration to determine density and strength.

  • Auger Boring: For shallow sampling and soil profiling.

  • Shelby Tube Sampling: Collects undisturbed samples for lab testing (important for cohesive soils).

  • Split Spoon Sampling: Used during SPT for disturbed soil samples.

Laboratory Soil Tests

A. Physical and Index Properties

  • Moisture Content (ASTM D2216)

  • Atterberg Limits (ASTM D4318): Liquid limit, plastic limit, plasticity index.

  • Grain Size Analysis:

    • Sieve Analysis (ASTM D6913) – for coarse-grained soils.

    • Hydrometer Analysis (ASTM D7928) – for fine-grained soils.

  • Specific Gravity (ASTM D854)

B. Compaction and Strength Tests

  • Proctor Compaction Test:

    • Standard Proctor (ASTM D698)

    • Modified Proctor (ASTM D1557)

  • Unconfined Compression Test (ASTM D2166): For cohesive soils.

  • Triaxial Compression Test (ASTM D4767): For shear strength under controlled drainage.

  • Direct Shear Test (ASTM D3080): Measures friction angle and cohesion.

  • California Bearing Ratio (CBR) Test (ASTM D1883): For pavement subgrade design.

    C. Consolidation and Settlement Tests

    • One-Dimensional Consolidation Test (ASTM D2435): Determines compressibility and settlement rate.

    D. Permeability and Drainage Tests

    • Permeability Test (ASTM D5084): Determines hydraulic conductivity.

    • Infiltration Rate (Double Ring Infiltrometer): For surface water percolation.

    Benefits of PT Slabs for Sports Applications:

    • No Control Joints Required: A continuous, joint-free surface improves safety, play quality, and aesthetics.
    • Superior Surface Flatness: Ensures accurate ball bounce and consistent game play.
    • Crack Resistance: Internal tension minimizes slab movement and thermal cracking.
    • Long-Term Durability: Withstands environmental stress and substrate movement.
    • Ideal for Premium Flooring Systems: Provides a flawless base for acrylic, PU, cushioned layers, or modular tiles.

    Recommended for:

    • Pickleball courts (indoor/outdoor)
    • Tennis courts
    • Multi-sport and professional competition courts
    • Sports clubs, schools, universities, and arenas

    Foundation Design

    Once soil conditions have been assessed, it is time for the soil remediation and foundation design.  Based on the lab results from soil testing and the STP test onsite, we will be able to determine key conditions such as soil drainage, weight-bearing capacities, shrink/swell risks, and slope stability, which are crucial considerations in the foundation design of your proposed structure.  

    Whether you are building a tennis court, a football pitch, or a full-sized professional stadium, with Winplus Sport, you can rest assured that every detail of your build has been addressed before ground is ever broken at the worksite.   The value of knowledge and expertise to mitigate risks and unknowns in any build cannot be overstated.  Especially in regions with problematic soils like Thailand.  DO NOT FALL VICTIM TO DESIGNED, UNDERDEVELOPED PROJECTS THAT LEAVE YOU HOLDING REMEDIATION COSTS AND LOSSES.

    BUILD RIGHT THE FIRST TIME WITH WINPLUS SPORT!

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