GTJ-Evd Dynamic Deformation Modulus Tester (Handheld Drop Weight
Deflectometer)
Usage overview
The GTJ-Evd type dynamic deformation modulus tester (hand-held drop
weight deflection instrument) is used to determine the deflection
capacity of the subgrade under the dynamic load, thereby evaluating
the bearing capacity and deformation of the subgrade. It is
applicable to the monitoring and inspection of foundation
construction quality of railways, highways, airports, urban
traffic, ports, terminals and industrial and civil buildings
subjected to dynamic loads. It is especially suitable for the
detection of narrow sections of the site, such as the transition of
roads and bridges (culverts) and the detection of shoulders. , both
line base and so on. It can quickly measure the dynamic deformation
modulus Evd value.
Applicable standard
"Earth Test Method for Railway Engineering" (TB10102-2010) "Evd
Plate Load Test".
Features
※ Imported sensors and some components are used for high test
accuracy.
※ LCD display in English and Chinese, there are corresponding
Chinese and English prompts under different interfaces; with
backlight, it has better visibility in various environments.
※ The operation is simple, the test speed is fast, and the
detection takes only 35 seconds.
※ The Evd value is automatically calculated and the curve is
displayed, which is accurate and intuitive.
※ Handheld main unit with Bluetooth micro-printer, direct printing
on site to ensure accurate and objective test results.
※ USB transmission interface, easy to connect with the computer.
※ This instrument simulates the impact of the train on the subgrade
when driving at high speed. Compared with the static load test, it
can reflect the actual stress of the subgrade soil.
※ Non-nuclear radiation and exhaust gas pollution, safe and
environmentally friendly.
Operation interface
Technical Parameters
| Scope of application | Applicable soil type | Various types of soil and earth and rock mixed fillers with a
particle size not larger than 1/4 of the diameter of the load plate |
| Test range | 10Mpa<=EVD<=225Mpa |
| Test depth | 0-500mm |
| Working environment | Temperature -10°C to 40°C Humidity <90%HR |
| Data acquisition device | Loading device | Weight: 15kg, including drop weight: 10kg Maximum impact: 7.07kN Impact duration: 18±1ms |
| Load plate | Weight: 15kg Diameter: 300mm Thickness: 20mm |
| Handheld host | Submergence test range | 0.10mm-2.00mm |
| Storage capacity | 2000 sets of test data |
| Specifications | Screen size: 3 inches Volume: 100x205x40mm Weight: 0.8kg |
| Power supply mode | Large capacity lithium battery, working time is more than 18 hours |
| Display mode | Chinese and English switching display |
| Printer | connection method | wireless bluetooth printing |
| Packing Specifications | Main Chassis | Material: Engineering Plastics Volume: 420x140x335mm Weight: 4.5kg |
| Outer box | Material: Aluminum alloy Volume: 1220x395x380mm Weight: 56kg |
Instrument composition
