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Soil Mechanics at Luleå University of Technology
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Geotechnical lab - Lulea University of Technology

In Geotechnical lab, experimental researches are carried out on soil mechanics and foundation engineering. The lab includes a number of geotechnical equipment for the study of soil behavior. For booking of the lab facility or request of performance of the lab tests, please contact:

Qi Jia

Qi Jia

Jia, Qi - Associate Senior Lecturer

Organisation: Soil Mechanics, Mining and Geotechnical Engineering, Department of Civil, Environmental and Natural Resources Engineering
Phone: +46 (0)920 493108
Email: qi.jia@ltu.se
Room: T3306 - Luleå»

Visit address: F 635h, Lulea University of Technology, 97187 Lulea

Geotechnical tests

  • Soil classification
  • Particle size distribution. Determined by wet and dry sieving, as well as sedimentation.
  • Atterberg limits (liquid limit, plastic limit, shrinkage limit). Determined by fall cone test
  • Density and compaction
  • Routine investigation
  • Permeability and capillarity
  • Strength test
  • Determined by unconfined compression test, triaxial test, direct shear, fall cone test.
  • Deformation test
  • Dtermined by odemeter test, triaxil tests, shear box.

Equipment

Triaxial / wet sieving Photo: Qi Jia
Triaxial / wet sieving Photo: Qi Jia

Test sieves are for determination of particle distribution . Both dry sieving and wet sieving can be carried out. Sieving determines the particles size down to 63 un. For the finer portion, sedimentation metho_d is used.

Hydrometer
It is used for determining the size of the particles smaller than 63 μm by sedimentation.

Pycnometer
For the determination of the particle density.

Proctor Photo: Qi Jia
Proctor Photo: Qi Jia

Proctor compaction
The Proctor compaction test is used to determine the optimal moisture content at which a given soil type will become most dense and achieve its maximum dry density.

Fall Cone Photo: Qi Jia
Fall Cone Photo: Qi Jia

Fall-cone apparatus
Fall-cone test is used to determine Atterberg limits, undrained shear strength, as well as s sensitivity for fine grained soil.

Permeameter  Photo: Qi Jia
Permeameter Photo: Qi Jia

Permeameter
Permeability of a soil is determined by Darcy's law, and it is either done by constant water head or falling head method.

Microscope Photo: Qi Jia
Microscope Photo: Qi Jia

Microscope
Microscope is used to study the shape of soil particles and the microstructure of a soil.

Permeameter  Photo: Qi Jia
Permeameter Photo: Qi Jia

Triaxial apparatus
Triaxial apparatus is used to determine the strength parameters and deformation properties of a soil sample. The tests can be done under unconsolidatedundrained condition, consolidated-undrained condition, as well as consolidateddrained condition.

Triaxial Photo: Qi Jia
Triaxial Photo: Qi Jia

Direct simple
Soil behavior in shear is tested by simple shear test. Can test samples with diameter of and 80mm. Maximum particles size is up to 8mm.

Direct shear Photo: Qi Jia
Direct shear Photo: Qi Jia

Large scale direct shear apparatus
The large scale shear apparatus is an enlarged version of standard direct simple shear. The sample size is enlarged to be 1m in height and 1 m in diameter which enables testing of rock particles up to
100mm.

Large shear apparatus Photo: Qi Jia
Large shear apparatus Photo: Qi Jia

Oedometer
The characteristics of a soil during one-dimensional consolidation or swelling, as well as soil creep can be determined by oedometer test.

Oedometer Photo: Qi Jia
Oedometer Photo: Qi Jia

Freezing room (the snow research)
In the lab, a research is being carried out on mechanical properties of snow and ice. The traditional experimental tests on soil mechanics are employed on snow though the temperature must kept low so that the snow does not melt. The cold region technology center is a part of geotechnical lab for snow research and for the further interests, contact:

Nina Lintzen

Lintzen, Nina - Associate Senior Lecturer

Organisation: Soil Mechanics, Mining and Geotechnical Engineering, Department of Civil, Environmental and Natural Resources Engineering
Phone: +46 (0)920 491747
Room: T3310 - Luleå»