Laboratory

Rock Mechanical Laboratory

Labor

Labor

The knowledge of the thermomechanical and hydraulically behaviour of the in situ rock mass is a main assumption to proof the static stability and tightness of underground excavations. In opposite to artificial materials like concrete and steel the material behaviour of natural rock mass respectively natural rock is characterized by a relatively wide scatterband depending on the mineralogical composition and genesis. Determination of the scatterband must be done by laboratory tests using site specific core samples to provide representative material parameters. Rock salt as well as clay stone are characterized by a distinct nonlinear, time-, stress- and temperature-depended as well as rate sensitive material behaviour. As a consequence of this complex material behaviour the material properties to quantify the stress-strain behaviour must be analysed by laboratory tests, taken into account

  • stress level,
  • stress geometry,
  • stress rate,
  • moisture,
  • bedding,
  • temperature and
  • time

Additionally to the aforesaid mentioned stress-strain-relationship critical values and criteria are needed to proof the static stability and tightness of underground excavations. Therefore laboratory investigations into the thermomechanical and hydraulically material behaviour of natural rock respectively rock mass is one main element in planning of framework and structural design. Regarding to the documented laboratory equipment the chair of Waste Disposal Technologies and Geomechanics is well appointed by a powerful physical lab. A first overview of the performance data is given by the outlined informations. Based on the possibility of short term modifications of the outlined testing equipment, thermomechanical and hydraulically tests can be considering loading paths in any order.

Uniaxial Compression testing device Dü6

technical data:


kind of experiments:
uniaxial compression test (UC)
indirect tensile testing machine (SZ)

axial force:
200 kN/ 500 kN, hydraulic

temperature:
room temperature

examined body:
optional

measurement recording:
computer controlled, MGC+

measurement recorder:
1 x displacement transducer W20/ W50
1 x pressure sensor P3MB, 50 MPa
1 x load cell 200 kN/ 500 kN


Uniaxial Compression Creep testing devices 1 - 3

technical data:


kind of experiment:
UCc

axial force:
up to 1000 kN, hydraulic

temperature
20-200 °C

humidity
30-100 %

examined body:
diameter 50-120 mm, length 180-250 mm

measurement recording:
computer controlled, 3xUPM60

measurement recorder:
3 x displacement transducer
3 x load cell 200 kN
1 x pressure sensor P3M
1 x temperature sensor Pt1000


Triaxial Compression/Extension testing devices Dü1 - Dü4

technical data:


kind of experiments:
TC, TE, TCc, TEc, TCH

axial force:
up to 2500 kN, hydraulic

confining pressure:
0-75 MPa, hydraulic

temperature:
20-100 °C, automatically controlled

examined body:
diameter 50-190 mm, length 100-300 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
3 x displacement transducer W20TS/ W50TS
3 x pressure sensor P3MB, 50 MPa
1 x Pt100
1 x dilatancy measurement
1 x ultrasonic wave velocity measurement
1 x permeability measurement (k=10-15 m2 to 10-24 m2)



Volumenmessung - online

Permeabilitätsmessungen

Triaxial Compression/Extension testing devices Dü8 - Dü11

technical data:


kind of experiments:
TC, TE, TCc, TEc, TCH

axial force:
up to 2500 kN, hydraulic

confining pressure:
0-70 MPa, hydraulic

Internal pressure:
0-70 MPa, hydraulic

temperature:
20-70 °C, automatically controlled

examined body:
diameter 90-150 mm, length 180-300 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
1 x displacement transducer W20TS/ W50TS
3 x pressure sensor P3MB, 50 MPa
1 x Pt100
1 x dilatancy measurement
1 x ultrasonic wave velocity measurement
1 x permeability measurement


Triaxial Compression/Extension testing devices Dü12 - Dü15

technical data:


kind of experiments:
TCc, TEc, TCH

axial force:
400 kN, hydraulic

confining pressure:
0-35 MPa, hydraulic

temperature:
20-70 °C, automatically controlled

examined body:
diameter 60-90 mm, length 180 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
1 x displacement transducer W20TS/ W50TS
2 x pressure sensor P3MB, 50 MPa
1 x Pt100
1 x dilatancy measurement
1 x ultrasonic wave velocity measurement


Triaxial Compression/Extension testing device Dü5

technical data:


kind of experiment:
in any scientific context

axial force:
up to 5000 kN, hydraulic

confining pressure/Internal pressure:
0-70 MPa, hydraulic

temperature:
-20 to +200°C, automatically controlled

examined body:
diameter 90-200 mm, length 180-400 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
3 x displacement transducer W20TS/ W50TS
3 x pressure sensor P3MB, 50 MPa
7 x Pt100
1 x dilatancy measurement
1 x ultrasonic wave velocity measurement


Triaxial Compression/Extension testing devices Dü16 - Dü19

technical data:


kind of experiments:
TC, TE, TCc, TEc, TCH

axial pressure:
0-200 MPa, hydraulic

confining pressure:
0-200 MPa, hydraulic

temperature:
-20 to +100°C, automatically controlled

examined body:
diameter 60-100 mm, length 120-250 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
1 x displacement transducer W20TS/ W50TS
3 x pressure sensor P3MB, 50 MPa
3 x Pt100
1 x dilatancy measurement
1 x ultrasonic wave velocity measurement


Direct shear testing device for hard rock

technical data:

kind of experiment:
direct shear test

axial force:
up to 1000 kN, hydraulic

shear force:
800 kN, hydraulic

temperature:
20-70 °C, automatically controlled

shear frame:
150 mm x 200 mm

shear path:
100 mm

measurement recording:
computer controlled, MGC+

measurement recorder:
1 x displacement transducer W20TS/ W50TS
2 x load cell
1 x Pt100
1 x ultrasonic wave velocity measurement



 

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