Home page » products » Construction Materials Testing  »  Soil Testing Equipment » SOIL TRIAXIAL TEST
Features

SOIL TRIAXIAL TEST

 

STANDARDS: BS 1377:7, 8 / ASTM D2850, D4767 / CEN-ISO/TS 17892-8, 9 / NF P94 070, P94 074

 

Introduction 

To design foundations, embankments and other soil structures, Geotechnical Engineers require methods of assess­ing the mechanical properties of soils. For over 60 years Wykeam Farrance, now incorporated in the CONTROLS Group, has been at the forefront of the development of test systems designed to give engineers the infor­mation they require.  

Since the development of the first com­mercially produced shear box machine in the 1950s, we have been working closely with leading Academics and Universities to produce testing sys­tems that further advance the under­standing of soil mechanics. 

The experimental investigation used to determine the stress-strain rela­tion is usually carried out with triaxial tests, where undisturbed soil specimen are subjected to different stress levels and drainage conditions to simulate as close as possible the different situ­ations that can occur in the subsoil on site because of the effect of building constructions, excavations, tunnelling, etc. 

Our geotechnical division manufac­tures a large sophisticated state of the art range of triaxial equipment, which is detailed above. 

 

Testing systems should include the following main modules  

A - TRIAXIAL LOAD FRAMES 

STANDARDS: BS 1377:8 / ASTM D2850, D4767 / CEN-1SO/TS17892-8, 9 / NF P94 070, P94 074 

 

28-WF4005 Tritechtriaxial load frame 50 kN cap.

110-240 V, 50-60 Hz, 1 ph.

 

28-WF4010 Tritechtriaxial load frame 100 kN cap.

110-240 V, 50-60 Hz, 1 ph.

 

Main features  

  • RS 232 control interface
  • Digital control
  • Speed range 0.00001 to 9.99999 mm per minute
  • Rapid approach facility
  • Audible alarm at limit of travel
  • LCD 4-row by 20 character display
  • All steel construction, stainless steel platen
  • The quality of the design has eliminated all vibrations that can affect the specimen under test

 

Technical specifications  

Models

28-WF4005

28-WF4010

 

50 kN cap.

100 kN cap.

Maximum sample size

105 mm dia.

150 mm dia.

Minimum speed

0.00001 mm per minute

0.00001 mm per minute

Maximum speed

9.99999 mm per minute

9.99999 mm per minute

Maximum force (compression)

50 kN

100 kN

Maximum force (tensile)

5 kN

5 kN

Minimum vertical clearance

335 mm

390 mm

Maximum vertical clearance

1000 mm

1040 mm

Horizontal clearance

364 mm

550 mm

Platen diameter

158 mm

158 mm

Platen travel

100 mm

100 mm

Dimensions (HxWxD)

1460x503x380 mm

1700x703x503 mm

Power (W)

600

680

Weight (kg)

98

195

 

 

B - LOAD AND DISPLACEMENT MEASUREMENT

 

Strain gauge load cells 

Used to measure the axial force applied to the specimen in the triaxial cells:

General specifications 

  • Nominal sensitivity                  : 2mV/V
  • Accuracy                                 : better than 0.1%

Code

Full scale

Thread

28-WF0370/T

2.5 kN

Female M20x1.5

28-WF0373/T

10 kN

Female M20x1.5

28-WF0375/T

50 kN

Female M30x2.0

28-WF0376/T

100 kN

Female M30x2.0

Note. All the load cells are supplied complete for connection to the upper beam of the triaxial frames (all models)

 

Potentiometric displacement transducers and mounting brackets  

  • Input voltage                            : 10 V DC
  • Output                                     : from 0 to 10 V DC
  • Repeatability                           : better than 0,002 mm
  • Accuracy                                 : better than 0,002 mm

 

30-WF6208 Axial displacement potentiometric transducer, 25 mm travel

30-WF6209 Axial displacement potentiometric transducer, 50 mm travel

30-WF6210 Axial displacement potentiometric transducer, 100 mm travel

30-WF6220 Mounting bracket for 28-WF4050 triaxial cell, 15.5 mm dia. ram

30-WF6221 Mounting bracket for  28-WF4070, 28-WF4100, 28-WF4150, 28-WF4070/P, 28-WF4100/P, 28-WF4150/P triaxial cells, 25 mm dia. ram

30-WF1048/T Mounting bracket for 28-WF0410/A, 28-WF0411/A, 28-WF0416/A

 

 C - TRIAXIAL CELL (Banded triaxial cells for specimens upto 150 mmdia.)  

Code

28-WF4050

28-WF4070

28-WF4100

28-WF4150

Nominal size (Ø mm)

38

70

100

150

Range of specimen size (Ø mm)

38-50

38-70

50-100

100-150

Max. working pressure (kPa)

2000

3400

2000

2000

Max. height (mm)

410

500

564

650

Diameter (mm)*

350

400

440

650

Weight (kg)

7

15

21

40

* Including valves

 

 

 

 

 

 

C.1 - BANDED TRIAXIAL CELL ACCESSORIES 

Cell type

28-WF4050

28-WF4050

28-WF4070

28-WF4100

28-WF4150

Pedestal

28-WF4031

28-WF4051

28-WF4071

28-WF4101

28-WF4151

Top cap(1)

28-WF4032

28-WF4052

28-WF4072

28-WF4102

28-WF4152

Base disc

28-WF4033

Specification

Technical specifications  

Models

28-WF4005

28-WF4010

 

50 kN cap.

100 kN cap.

Maximum sample size

105 mm dia.

150 mm dia.

Minimum speed

0.00001 mm per minute

0.00001 mm per minute

Maximum speed

9.99999 mm per minute

9.99999 mm per minute

Maximum force (compression)

50 kN

100 kN

Maximum force (tensile)

5 kN

5 kN

Minimum vertical clearance

335 mm

390 mm

Maximum vertical clearance

1000 mm

1040 mm

Horizontal clearance

364 mm

550 mm

Platen diameter

158 mm

158 mm

Platen travel

100 mm

100 mm

Dimensions (HxWxD)

1460x503x380 mm

1700x703x503 mm

Power (W)

600

680

Weight (kg)

98

195


Print