In the era of massive infrastructure expansion, Field Vane Shear Testing (FVST) has emerged as the definitive method for evaluating the undrained shear strength (Cu) of soft, saturated cohesive soils. From offshore wind farms to high-speed railway embankments, our equipment provides the critical data needed to prevent catastrophic slope failures and foundation collapses.
As urbanization accelerates globally, construction is increasingly pushed into marginal lands with soft clay deposits. The global geotechnical instrumentation market is shifting towards automated, high-resolution torque sensing. Zealchon stands at the forefront, bridging the gap between traditional manual methods and the digital future of geological surveying.
Our instruments are engineered to exceed ASTM D2573 and Eurocode 7 requirements. We provide localized support ensuring that your soil characterization reports meet the most stringent regulatory approvals across North America, the EU, and Southeast Asia, focusing on data integrity and repeatability.
With more than 15 years of civil engineering background, located in the new technology industry development zone in Xi'an, Zealchon occupies a significant 7500 square meters of building area. We are not just a manufacturer; we are a hub of innovation for geological survey, water conservancy, hydropower, roads, bridges, and airports.
Our specialization lies in the production of geotechnical testing instruments, asphalt mixture testing systems, and high-performance concrete evaluation equipment. Under the guidance of experts from Chang'an University and Xi'an University of Technology, we have developed the professional "Xiya" trademark, a symbol of quality in Shaanxi Province.
Modern Field Vane Shear Testing is evolving beyond simple peak torque measurement. Our Next-Generation FVST roadmap focuses on several key technological increments:
Replacing mechanical gauges with digital transducers that capture stress-strain curves in real-time. This allows for the identification of soil sensitivity and remolded strength with millisecond precision.
Advanced rod-soil friction correction algorithms. Our equipment features dual-sensor technology to isolate the resistance of the vane from the mechanical friction of the drill string.
Cloud-based data synchronization where field results are instantly uploaded to a central geotechnical database, enabling remote site supervision and immediate engineering analysis.
Research team founded by personnel from Chang'an University and Xi'an Polytechnic University, holding the top technology in this expertise.
Won national, ministerial, and provincial awards. Some products fill the blank of similar equipment at home and abroad.
Used by government agencies, commercial testing labs, and contractors globally for over 15 years.
The Field Vane Shear Test (FVST) is specifically suited for soft clays, silts, and organic soils where traditional sampling (Shelby tubes) causes significant disturbance. Our equipment addresses the core challenge of Undrained Shear Strength Characterization through superior blade design and controlled rotation rates.
Successful FVST requires understanding the stratigraphic profile. Our modular vane rods allow for testing at depths exceeding 30 meters. In marine environments, we offer specialized casing to protect the vane from lateral currents and borehole collapse.
The standard rotation rate of 0.1°/sec is critical. Our automatic systems eliminate human error, ensuring that the pore water pressure doesn't dissipate during the test, maintaining a strictly undrained condition—vital for accurate $S_u$ calculation.
We provide comprehensive software tools to apply correction factors based on Plasticity Index (PI) and local geological conditions, converting field data into design-ready values for engineering software like Plaxis or Slide.
Years Experience
Sqm Factory
Countries Served
National Awards
Our high-precision strain-gauge transducers offer a resolution of 0.1 N·m, ensuring accuracy within ±0.5% of the full-scale range, compliant with ASTM D2573.
Yes. After the peak strength is measured, the vane is rotated rapidly (10+ times) to measure the residual or remolded strength, allowing for soil sensitivity calculation.
Our systems include a slip-coupling or a dummy-rod test protocol to accurately subtract rod friction from the total torque measured at the surface.
The company keeps up with national and industry standards testing, maintaining a production and sales service mechanism deeply trusted by users worldwide.
Adhering to "people-oriented, unity and cooperation, pursuit of excellence," we ensure quality first, honesty, and customer-centric development.
Providing the market with high-quality technology-based professional services. We offer "three guarantees" for all products, embodying the craftsman spirit.
Zealchon Electronic
