Geotextile Pull out Testing Apparatus
The frictional characteristics of a soil-geosynthetic interface can be determined by direct shear and pull-out tests while soil–geosynthetic interaction parameters and their determination play important role in the design of reinforced soil structures.
The large direct shear test can be upgraded to run pull out test on the same sample size of main device for evaluating the soil–geosynthetic interaction parameters under pullout, but this upgrading order must be placed before starting of construction. This upgrading increases the length of the main direct shear device.
- Features
- Specifications
- Software
- Standards
- Applications
- Determination of tensile strength in different layers like soil / Geotextiles / Geomembranes
- In accordance to CEN and ASTM standards
- Long extended apparatus with special sliding system for installation of geotextile/non-woven clamps
- Special Clamping roll for Pull out tests on thin geotextiles or geomembranes or similar materialsincluding coupling components for installation in large direct shear machines of series ADS-300 or500
- Fixation for lower shear box for pull-out tests
- Preparation of stainless-steel container (for saturated tests) for pull-out tests
- Electrical plug connections and controller preparation for additional sensors (e.g. draw wire sensors)
- Max. tension load: 60 kN
- Max. sample width depends on the current apparatus (300 mm / 500mm)
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Load type |
Electromechanical |
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Normal force |
60 kN / 100 kN / 125 kN |
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Shear force |
60 kN / 100 kN / 125 kN |
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Speed range |
0.00001 mm/min - 60 mm/min |
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Accuracy class |
0.1% |
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Resolution |
0.00001 kN |
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Vertical displacement |
50 mm |
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Shear displacement |
100 mm |
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Resolution |
0.001mm |
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Computer Interface |
Ethernet |
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sample size |
300x300mm |
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Upper Shear Box(W*D*H) |
300*300*100 mm
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Lower Shear Box(W*D*H) |
300*400*100 mm |
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www.Wille-Geotechnik.com 10 SOIL LARGE DIRECT SHEAR TEST MODULE
GEOsys is designed for closed-loop controlled static & Dynamic tests for all test applications in material testing, such as stress-controlled, strain-controlled, any kind of waveforms like sine, rectangle, triangle, and predefined waves.
The software allows to run direct shear tests on cohesive and non-cohesive soils as well as direct shear tests on soil-geosynthetic interfaces.
It is controlling and data acquisition software and also has different modules to run tests according to ASTM or other standard methods. Depends on the requirement of the customer one or several modules would be delivered with main software, such as:
- Data Acquisition, processing and device management (DPD) Module
- Consolidation Stage (Single stage, multiple stage or over consolidation mode)
- Step or ramp axial force
- stress or strain ramps during consolidation and multistage shear tests
- Static Direct Shear moduleConstant Normal Stress test
- Constant Normal Height test
- Constant normal stiffness test (CNS)
- Shear stress-controlled test
- Shear displacement control (forward and reverse)
- Calculation of shear stresses
- Creep test
- Pull-out test
- Not available
- Detailed information will follow soon