Geotechnical Centrifuge Laboratory

Geotechnical Centrifuge Laboratory

Simulates the behavior of the ground and structures utilizing centrifugal force

In this laboratory, we conduct experiments related to ground and structures. The behavior of actual ground and structures can be simulated in small-scale models by applying centrifugal force. Using the centrifuge, we are able to simulate liquefaction, slope failure, and other ground-related disasters, and based on the test results, we develop countermeasures against them. We also work on the development of practical foundations such as piled raft foundations and soil improvement.

Types of Testing

  • Simulation of liquefaction, lateral spreading in sandy soil, slope failure, and landslide, as well as confirmation of countermeasure performances
  • Evaluation of pile bearing capacity by axial compression and pull-out test
  • Simulation of consolidation settlement of cohesive soil, and evaluation of its impact on structures
  • Evaluation of dynamic interaction between ground, foundation and superstructure

Facility Features

Geotechnical Beam Centrifuge

  • Effective radius of 3.1 meters, centrifugal acceleration up to 100 G, payload capacity of 300 kg (shaking test)
  • 64-channel monitoring system, data recording via wireless LAN
  • Electromagnetic shaking table

Geotechnical Laboratory

  • Unconfined compression testing apparatus, triaxial testing apparatus, hollow cylinder torsional testing apparatus, true triaxial stress testing apparatus
  • Shear wave velocity measurement of soil samples using bender elements and ultrasonic sensors

Examples of Tests and Achievements

  • Gravel Support (simple countermeasure against liquefaction for small structures)
  • Design method for lattice-shaped soil improvement (countermeasure against liquefaction)
  • Construction method to prevent uplifting of underground structures during liquefaction
  • Countermeasure against lateral spreading by counterfort sheet pile
  • Non-destructive quality inspection of cement-treated soil (Vs-QUIC system)
  • Simulation of stone wall collapse and support system for restoration
Experiment verifying the effectiveness of
with (left) and without (right) Gravel Support
Model of lattice-shaped soil improvement (countermeasure against liquefaction)
Model of lattice-shaped soil improvement (countermeasure against liquefaction)

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