Basic Introduction of GDS Instruments

Basic Introduction of GDS Instruments GDS Instruments (A Division of Global Digital Systems Limited), U.K.

List of GDS Products 1. Instrumented Hoek Cells 2. Consolidation Testing System - GDSAOS 3. Direct and Simple Shear Systems 4. Environmental Triaxial Range 5. GDS Rock Mechanics Range 6. Advanced Dynamic Triaxial Testing System(DYNTTS) 7. Hydraulic Resilient Modulus Testing System 8. GDS SASW and CSWS 9. GDS True Triaxial Apparatus 10. GDS Triaxial Automated System (GDSTAS) 11. GDS Triaxial Testing System (GDSTTS)

12. Hollow Cylinder Apparatus(GDSHCA) 13. Pressure and Volume Controllers 14. Resonant Column Apparatus (RCA) 15. Unsaturated Soil Testing System (UNSAT)

1

Instrumented Hoek Cells GDS Instrumented Hoek Cell is very versatile equipment on research focused, operated with 70mpa Cell and maximum loads up to 2MN. Applications :

• • • • • •

Embankment Dams Testing Tunneling Testing Construction Testing Landslides Testing Offshore Testing Pavement and Highways Testing • Piling Testing

Technical Specification: Axial Load : Dimensions: 381mm diameter, 305mm high Pressure Range (MPa): 70 Request a Quote Sample Sizes: 38 x 76.2 and 50.8 x 101.6 Weight Approx. (kg): 180

2

Consolidation Testing System - GDSAOS

This is a modern replacement for a traditional hanging weight Oedometer. For Consolidation Testing of Soil.

Applications :

• • • •

Construction Testing Embankment Dams Testing Offshore Testing Unsaturated Soil Testing in the Laboratory

Axial Force Accuracy : 0.1%FRO, Technical Specification: Dimensions: W/D/H - 220mm, 180mm (260mm including keypad), 485mm Displacement Accuracy: 0.1% - dependent on transducer selected Request a Quote Load Range (kN) Max Load: 10kN Power: 110 to 240 AC Volt Input, 60Watts Sample Sizes: 50, 63.5, 71.4, 75, 101.6 & 112.8 mm (Other sizes available by request).

3

Direct and Simple Shear Systems

GDS Instruments leads the world with its Shear testing systems in both high pressure, low pressure and unsaturated versions.

Measurement of Shear Strength of Soil and Rock under various conditions.

Actuators: 3 x electromechanical, high accuracy, encoder controlled actuators.

Axial Force Accuracy: Typically <0.1% Axial Load: 5kN Displacement Resolution: 0.3um Technical Specification: Load Range (kN): 5kN normal force, 2kN on each shear measurement (y and z).

(Variable Dynamic Simple Shear) Operating Frequency (Hz) : 1Hz Sample Sizes: 50mm & 70 diameter, 20 to Request a Quote 30mm height Applications :

Some of the most popular systems are: 1.Electromechani cal Dynamic Simple Shear 2. Variable Dynamic Simple Shear 3. Advanced Dynamic Simple Shear 4. Ring Shear 5. Interface Shear 6. GDS Shear Base System

4

Environmental Triaxial Range

Environmental Triaxial Range Products are the temperature controlled testing systems for stress path testing.

Applications :

• Frozen Soils Testing • Temperature Controlled Testing • Gas Hydrate Testing • Construction Testing • Embankment Dams Testing • Piling Testing • Tunneling Testing

Technical Specification: Pressure Range (MPa): 10 Sample Sizes: Max length 100mm, Max diameter: 55mm Request a Quote

5

GDS Rock Mechanics Range

GDS Rock Mechanics Range: A high load, high pressure load frame based triaxial testing system for accurate testing of rock samples.

Applications :

• Local Strain Measurement • Unsaturated Testing • Bender Element Testing

This 16 bit device has 8 computer controlled gain ranges specifically designed to suit transducers used in a testing test • +/-10mV, +/-20mV, +/-30mV (load cells) Technical Specification: • +/-100mV, +/-200mV (pressure transducers) • +/- 1V, +/- 5V, +/- 10V (displacement Request a Quote transducers)

6

Advanced Dynamic Triaxial Testing System(DYNTTS)

It is a high-end, no compromise testing apparatus combining a triaxial cell with a dynamic actuator capable of applying load, deformation and stresses up to 10Hz. Applications : Actuators: High accuracy electromechanical Axial Force Accuracy: <0.1% Axial Load: 10kN, 20kN, 25kN, 40kN or 60kN Computer Interface: USB Displacement Range: 100mm Displacement Resolution: 0.20um Operating Frequency (Hz): Resolution of Measurement Technical Specification: and Control: 10kHz control cycle Sample Sizes: up to 300mm

• • • • • • •

Earthquake Testing Offshore Testing Construction Testing Embankment Dams Testing Frozen Soils Testing Piling Testing Temperature Controlled Testing • Tunneling Testing Request a Quote

7

Hydraulic Resilient

Modulus Testing System

It enables the resilient modulus and permanent deformation of unbound base/sub-base pavement materials to be determined.

Applications :

Hydraulic Resilient Modulus Testing System

Data Acquisition: 16 Bit Load Range (kN) : 28 or 50 Operating Frequency (Hz) : 10 Technical Specification: Pressure Range (MPa) : 1 as standard Sample Sizes : 38 to 150 as standard Request a Quote

8

GDS SASW and CSWS

The difference between the systems are that the CSWS system uses a ground vibrator as the source of the energy, and the SASW uses an impact source (usually a sledge hammer).

A

s: n o cati i l p p

SASW - It allows fast, non-invasive testing for all soil types, including residual soils and fractured soft rock.

CSWS - CSWS system typically measures to penetration depths between 2 and 3 times that of the SASW system.

Technical Specification:

Technical Specification: Spectral Analysis of Surface Waves (SASW)

Continuous Surface Wave System (CSWS)

Computer Interface : USB Connection Dimensions: 400mm x 380mm x 150mm Power: 12-24V DC Weight Approx. (kg) : 5.5

Computer Interface : USB Connection Dimensions: Unit: 400mm x 380mm x 150mm and Ground vibrator: 450mm x 350mm x 180mm Power: 12-24V DC Weight Approx. (kg) : Ground Vibrator 70

Request a Quote

9

GDS True Triaxial Apparatus The GDS True Triaxial Apparatus (GDSTTA) has the defining characteristic that, unlike conventional triaxial apparatus, all three principal stresses can be controlled independently, rather than just two in a conventional triaxial system.

Applications :

Actuators: 4 Axial Force Accuracy : 0.1% FRO Computer Interface: USB Operating Frequency (Hz): 0 to 5 Technical Specification: Pressure Accuracy: Dependent on chosen pressure controller Request a Quote Sample Sizes : Max 75 x 75 x 150mm

• • • • • • •

True Triaxial Testing of Soils Construction Testing Earthquake Testing Embankment Dams Testing Piling Testing Tunneling Testing Unsaturated Soil Testing in the Laboratory

10

GDS Triaxial Automated System (GDSTAS) Its is a load frame-based triaxial testing system. The system is configured by choosing from a range of load frames, triaxial cells, pressure controllers and software.

• Landslides Testing Applications :

• • • •

Tunneling Testing Embankment Dams Testing Construction Testing Piling Testing

Computer Interface: ADV (RS232 OR IEEE), STD (USB), EL (USB) Load Range (kN): Standard Set-up (STDTAS): 50, 100, Technical Specification: 250, 500, Advanced Set-up (ADVTAS): 50, 100, 250, 500, High Pressure Set-up (HPTAS): 50, 100, 250, 500, 1000, 2000 Pressure Range (MPa): Standard Set-up (STDTAS): 1, Advanced Set-up (ADVTAS): 1 to 8, High Pressure SetRequest a Quote up (HPTAS): 8 to 100.

Sample Sizes: 38mm to 300mm

11

GDS Triaxial Testing System (GDSTTS) The GDS Triaxial Testing System (GDSTTS) is a fully automated triaxial testing system designed principally for stress path testing.

• • Applications : • •

Automated Triaxial Testing of Soil Tunneling Testing Embankment Dams Testing Construction Testing

Technical Specification:

Request a Quote

Accuracy of Pressure Measurement: Standard Set-up (STDTTS) <0.15% full range Accuracy of Volume Measurement: Standard Set-up (STDTTS) 0.25% measured value Load Range (kN): Standard Set-up (STDTTS): 7 or 25 , Advanced Set-up (ADVTTS): 7 or 25 Pressure Range (MPa): Standard Set-up (STDTTS): 1,2,3,4 , Advanced Set-up (ADVTTS): Up to 10, High Pressure Set-up (HPTTS): Up to 10.

Resolution of Pressure Measurement : Standard Set-up (STDTTS): 1kPa, Advanced Set-up (ADVTTS): 0.1kPa Sample Sizes: 38mm to 300mm

12

Hollow Cylinder Apparatus(GDSHCA)

It allows for rotational displacement and torque to be applied to a hollow cylindrical specimen of soil.

Applications :

• • • • •

Earthquake Testing Construction Testing Embankment Dams Testing Offshore Testing Unsaturated Soil Testing

• Axial Displacement Encoder : <1μm • Axial Load : <0.3N (For 10kN system) • Axial/Torque Force Range : 10kN/100Nm, 10kN/200Nm, 12kN/200Nm, 15kN/400Nm • Dimensions : 700 X 700 X 1000mm (cell de-mounted) Technical Specification: • Load Range (kN) : 10, 12 or 15 • Pressure Range (MPa) : 1, 2 • Sample Sizes : 100/60/200 or 200/160/400 (OD, ID, Request a Quote height) • Weight Approx. (kg) : 500

13

Pressure and Volume Controllers GDS Advanced Pressure/Volume Controller (ADVDPC) is a general-purpose water pressure source and volume change gauge for the precise regulation and measurement of fluid pressure and volume change.

Applications :

Pressure and Volume Control

• Accuracy of Pressure Measurement: <0.1% full range • Computer Interface : RS232 • Axial/Torque Force Range : 820mm x 230mm x 220mm • Dimensions : 820mm x 230mm x 220mm (2MPa 20cc te : o u n tio taQ Version) s a e c u fi i c Req pe • Power : 92-265v, A.C. 48-440Hz, 65w Maximum S l a c • Volume Capacity : 200cm3 or 1000cm3 hni c e T • Weight Approx. (kg) : 20

14

Resonant Column Apparatus In research and commercial laboratories to estimate values of the shear modulus, G, and damping ratio, D, for soil specimens.

Applications :

Technical Specification: Request a Quote

• Study behavior of Soils under Resonance • Gas Hydrate Testing • Temperature Controlled Testing • Offshore Testing • Pavement and Highways Testing

• Operating Frequency (Hz) : 0 to 300Hz • Pressure Range (MPa): 1MPa (Standard), 2MPa, 3MPa and 25MPa • Axial/Torque Force Range : 50mm, 70mm, 100mm, 150mm

15

Unsaturated Soil Testing System (UNSAT) Unsaturated Soil testing can also be added to the following test types, Shear, Hollow Cylinder, Resonant Column, Consolidation and True Triaxial Testing.

Applications :

Unsaturated Triaxial Testing of Soil

Technical Specification:

Request a Quote

â&#x20AC;˘ Accuracy of Volume Measurement : Method A (0.25%), Method B (<0.04% or 32mm3), Method C (<0.25%), Method D (<0.8 or 0.1%). â&#x20AC;˘ Sample Sizes : Any size available, constraint is the cell size.

•

GDS Instruments - Established in 1979, GDS Instruments, a division of Global Digital Systems Ltd, is a world leader in the manufacture of laboratory and field testing equipment for use by geotechnical engineers and geologists continue to develop hardware and software based solutions to our users’ problems.

•

Aimil Ltd : We are the trustworthy distributor and supplier of GDS Instruments in all over India.

k n a Th u Yo

ow N iry u q En

Contact Address : Get In Touch +91 11 3081 0200 (H.O.) Naimex House A-8, Mohan Co-operative Industrial Estate, Mathura Road, New Delhi - 110 044 1800 3002 0330 (Service Toll Free Number) info@aimil.com