Torsional Triaxial Test Apparatus

SEIKEN,INC.

Hollow torsional test is seeking the dynamic deformation character, formally, it means Cyclic torsional with hollow cylindrical specimen to each the soil deformation character
And it can do several kinds of soil test, for example, Liquefaction strength test, search the soil strength after the liquefaction with taking large revolving stroke, etc.
As the feature of this apparatus, the hydraulic servo control makes possible to do excellent following-up to the stress level of purpose compared with usual pneumatic type.Regarding the pressure control of Triaxial cell, vertical pressure and lateral pressure are done independently. It makes possible to do flexible response from Isotropic consolidation to Anisotropic consolidation.
As many options are available, it can be upgrade this apparatus to corespond to every testing method.

Torsional Dynamic Triaxial Apparatus, EH Servo Type DTC-199

Feature

Smooth waveforms and accurate feedback can be done because this vibration apparatus is worked by Electric- Hydraulic servo control.

As triaxial cell's piston takes no-packing type air bush piston,there is only very small friction. It makes possible to do small loading & measurement.
As the torque and vertical load are in a body and it has a water pressureproof construction, both torque and vertical load of the specimen can be measured directly in the triaxial cell.

Each water system is protected against air mixing, not to mention Vacuum type de-aired water making apparatus. Especially, back pressure generating system is arranged concentrated protection against air mixing.

Besides, carbon dioxide ventilator, etc. which are effective to sandy soil are available.

Specification
Test Condition	Consolidation Condition	Isotropic & Anisotropic Consolidation
Test Condition	Cyclic Torsional Shearing Test	Liquefaction strength test, deformation character test (Stress control of Sine, Triangle & Rectangle waves and random wave by external input). But, random wave is used for Strain control test.
Constitution	Vertical Loading & Torsional LoadingApparatus	Frame capacity Vertical 10kN, Torsional ５kN･cm for Vertical loading : Pneumatic actuator 2kN
	Vertical Loading & Torsional LoadingApparatus	Torsional load: Hydraulic actuator 2kN, with Servo valve
	Hollow Torsional Triaxial Compression Cell	Specimen size: dia.100Xdia.60X100mm 　　　　　　　　　　 dia.70Xdia.30X70mm (Standard size) Max. Vertical load: 2kN Lateral pressure (usual use): 800kN/m2 Torque load cell, Equipped with Angle displacement transducer Air bush piston, No-packing type
	Hollow Torsional Triaxial Compression Cell
	Hydraulic Generator	Motor 3.7kw, 200V, 3 phases, Pressure 10MPa Delivery 13L/min. Tank capacity 100L Cooling of Oil temperature: Air cooling type
Electric-Measurement Apparatus	Torque Load Cell	Waterproof type, Inner load cell Vertical: From 1kN to 5kN Torsional: From 1kN-cm to 5kN-cm Vertical load: From 1kN to 5kN
	Angle Displacement Transducer (Large)	+/- 20^o
	Small Angle Displacement Transducer	Gap sensor +/- 1^o
	Pore Water Pressure Transducer	1MPa
	Lateral Pressure gauge	1MPa
	Vertical Displacement Transducer	20mm
	Volume Change Apparatus	Double tube Burette 25ml (Combination with Differential pressure convertor)
	Servo Controller	Frequency From 0.01to 10Hz waveform　Sine, Triangle, Rectangle & with External input terminal With Slope generator input circuit
	Feedback switching apparatus	Torque, Angle displacement
	Dynamic Strain Amplifier	For Vertical load cell, Vertical displacement transducer, Inner torque load cell, For Small angle displacement x2, Large angle displacement, Pore water pressure, Lateral pressure, Volume change apparatus
	Dynamic Strain Amplifier
Accessories	Electric Compressor	Package type, Motor 200V 3 phase Subsidiary Tank 83L
	Air drier	Compressed air drier, frrezing type AC 100V motor 75W
	Electric Vacuum Pump	For making of De-aired water 50L For double vacuum control 20L
	Besides, many accessaries are avaiable.