FSTX Frozen Soil Triaxial System

  • 100 kN (22 kips) axial load & 20,000 kPa (3,000 psi) cell pressure capacity. Larger capacities available
  • Computer temperature control to -30ºC & high temperatures up to +150°C
  • Electro-hydraulic closed-loop digital servo control
  • Software modules for the performance of UU, CU, and CD static tests with stress path control and dynamic tests such as liquefaction, modulus/damping measurement, cyclic strength, and resilient modulus
  • Available options: Internal axial &circumferential deformation measurement system, platens with ultrasonic transducers for P-and S-wave velocity measurements


The GCTS Frozen Soil Triaxial System uses a computer controlled metering valve and an internal copper vaporization coil for controlling test temperatures below the ambient room temperature. Measurements from two temperature probes are used to calculate and control the average temperature inside the triaxial cell. Included with this system is an efficient electrical heating and cooling unit for controlling the temperature inside the triaxial cell. This unit, unlike the LN2 systems, offers a safe and low operating cost.

A cascade digital temperature control is integrated with the testing software for precise temperature control while eliminating temperature overshoots. The complete system also includes the load frame, triaxial cell, volume change device, pressure panel, sensors, digital signal conditioning, and software for complete integration of the testing system. This system accepts specimens with diameters from 35 mm to 75 mm, and with specimen lengths of 2.25 times the diameter. Platens for 71 mm diameter specimens come standard with this system. An automatic lift is provided to rise and lower the metallic cell wall for easy specimen setup.

Frozen Soil Triaxial Testing

Frozen soil triaxial testing, often referred to as “Frozen Soil Triaxial,” is a cutting-edge technology revolutionizing the way geotechnical engineers and researchers analyze the mechanical properties of frozen soils. At Avantech, we proudly introduce the FSTX Frozen Soil Triaxial System, a state-of-the-art solution designed to unlock the mysteries hidden beneath the icy layers of the Earth’s surface. In this comprehensive guide, we will delve deep into the world of frozen soil triaxial testing, exploring its significance, methodology, and applications.

Understanding Frozen Soil Triaxial Testing

1. What is Frozen Soil Triaxial Testing? Frozen Soil Triaxial Testing, often abbreviated as FST, is a specialized geotechnical testing method used to evaluate the mechanical behavior of frozen soils under various stress and strain conditions. This testing technique is crucial for understanding the stability and engineering properties of frozen ground, especially in regions with cold climates or permafrost.

2. Significance of Frozen Soil Triaxial Testing: Frozen soil environments pose unique challenges for construction and infrastructure development. Understanding the behavior of frozen soils is vital for designing safe and stable foundations, slopes, tunnels, and other civil engineering structures in cold regions. Frozen Soil Triaxial Testing provides essential data that aids engineers in making informed decisions, ensuring the durability and safety of projects.

3. The FSTX Frozen Soil Triaxial System: Avantech’s FSTX Frozen Soil Triaxial System stands as a beacon of innovation in the realm of geotechnical testing equipment. This advanced system combines precision, reliability, and ease of use, making it an invaluable tool for researchers and engineers working in cold climate regions.

4. Key Features of FSTX Frozen Soil Triaxial System:

  • Precise Temperature Control: The FSTX system ensures accurate testing by maintaining consistent temperatures during experiments, mimicking real-world frozen soil conditions.
  • High-Pressure Capability: With its high-pressure capacity, the FSTX system can simulate various stress conditions that frozen soils might experience in the field.
  • Intuitive User Interface: The user-friendly interface makes operating the system seamless, allowing researchers to focus on their experiments without unnecessary complications.
  • Data Accuracy: Avantech’s FSTX system delivers reliable and precise data, enabling engineers to make informed decisions based on the test results.

Applications of Frozen Soil Triaxial Testing

5. Engineering Applications of Frozen Soil Triaxial Testing: Frozen Soil Triaxial Testing finds applications in a wide array of engineering projects, including the construction of roads, bridges, dams, and underground structures in cold regions. By providing critical data on soil behavior, this testing method ensures the stability and longevity of infrastructure projects.

6. Research and Development: In the realm of scientific research, Frozen Soil Triaxial Testing is indispensable for understanding the complex interactions between frozen soils and various external factors. Researchers leverage this technology to enhance their knowledge of soil mechanics, contributing to the development of innovative solutions for geotechnical challenges.

Frequently Asked Questions (FAQs)

FAQ 1: How does Frozen Soil Triaxial Testing differ from traditional soil testing methods?

Traditional soil testing methods do not account for the unique properties and behaviors of frozen soils. Frozen Soil Triaxial Testing is specifically designed to simulate the real-world conditions of frozen ground, providing accurate data crucial for cold climate engineering projects.

FAQ 2: Can the FSTX system be customized for specific research requirements?

Yes, Avantech offers customization options for the FSTX Frozen Soil Triaxial System. Researchers can tailor the system according to their specific testing needs, ensuring that the equipment aligns perfectly with the objectives of their experiments.

FAQ 3: What are the temperature ranges supported by the FSTX system?

The FSTX system is capable of operating within a wide range of temperatures, from slightly below freezing to extremely low temperatures, replicating the conditions found in frozen soil environments across the globe.

FAQ 4: Is training provided for operating the FSTX Frozen Soil Triaxial System?

Avantech provides comprehensive training sessions for users to familiarize themselves with the operation of the FSTX system. Our experts ensure that researchers and engineers are proficient in conducting tests and interpreting results effectively.

FAQ 5: How is data analysis performed after conducting Frozen Soil Triaxial Tests?

The FSTX system is equipped with advanced software that facilitates efficient data analysis. Researchers can visualize and interpret the test results using intuitive graphs and charts, enabling them to draw meaningful conclusions from their experiments.

FAQ 6: Can the FSTX system be used for long-term testing of frozen soils?

Yes, the FSTX Frozen Soil Triaxial System is designed for both short-term and long-term testing. Its robust construction and precise temperature control allow researchers to conduct extended experiments, ensuring accurate and reliable results over extended periods.

FAQ 7: What safety measures are in place for operating the FSTX system?

Avantech prioritizes user safety. The FSTX system is equipped with multiple safety features, including emergency shut-off mechanisms and temperature monitoring systems, to ensure a secure testing environment for researchers and operators.

FAQ 8: Can the FSTX system be integrated with other geotechnical testing equipment?

Yes, the FSTX system is compatible with various accessories and can be integrated with other geotechnical testing equipment, allowing researchers to conduct comprehensive studies by combining different testing methods and obtaining a holistic view of soil behavior.

FAQ 9: What kind of technical support does Avantech provide for the FSTX system?

Avantech offers 24/7 technical support to assist users with any queries or issues related to the FSTX Frozen Soil Triaxial System. Our dedicated support team ensures that researchers receive prompt and effective assistance, guaranteeing uninterrupted research activities.

FAQ 10: Is the FSTX system suitable for both laboratory and field testing?

While primarily designed for laboratory testing, the FSTX system’s portability and versatility make it adaptable for certain field testing applications. Researchers can transport the equipment to field sites, allowing them to conduct on-site experiments and gather real-time data.

Conclusion: Pioneering Progress in Cold Climate Engineering

In conclusion, Frozen Soil Triaxial Testing, facilitated by the state-of-the-art FSTX Frozen Soil Triaxial System from Avantech, is at the forefront of geotechnical engineering research. By unraveling the complexities of frozen soils, engineers and researchers can design resilient infrastructure, ensuring the safety and sustainability of projects in cold climate regions. With its precision, reliability, and adaptability, the FSTX system stands as a testament to human ingenuity, pushing the boundaries of scientific exploration and enabling innovative solutions for the challenges posed by frozen soil environments.

For more information on the FSTX Frozen Soil Triaxial System and how it can elevate your research and engineering endeavors,


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