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Volume 38 Issue 1
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LI Yuan-hai, JING Hong-wen, CHEN Kun-fu, JIA Ran-xu. Development and applications of physical model test system with true triaxial loading unit for deep tunnels or roadways[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(1): 43-52. DOI: 10.11779/CJGE201601003
Citation: LI Yuan-hai, JING Hong-wen, CHEN Kun-fu, JIA Ran-xu. Development and applications of physical model test system with true triaxial loading unit for deep tunnels or roadways[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(1): 43-52. DOI: 10.11779/CJGE201601003
shu

Development and applications of physical model test system with true triaxial loading unit for deep tunnels or roadways

  • 1. State Key Laboratory for Geomechanics &
    Deep Underground Engineering, Xuzhou 221116, China;
    2. School of Mechanics &
    Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China

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  • Received Date: December 11, 2014
  • Published Date: January 19, 2016
    Graphical Abstract
    • Abstract
  • A large-scale physical model test system with true triaxial loading unit and digital photogrammetry is developed. Using this test system, it is possible to study the stability of rock mass and support control technology for the deep rock tunnel with an overburden of over 1000 m. The test system consists of a reaction frame, a hydraulic control unit with oil-driven actuators and vacuum oil feed-back pump, a deformation and stress measuring unit with self-developed digital photogrammetric technology and stress measuring method, and tunnel excavation and support instruments. Large-scale model with a size of 1000 mm×1000 mm×1000 mm can be used in this test system. Two model tests are presented. One is analyzing the deformation and stress distribution of a deeply buried tunnel. The other is reproducing a local fracture phenomenon. The test results show that the test system is useful for investigating the deformation and fracture laws of deeply buried tunnels such as mining roadways and TBM tunnels during excavation and supporting, and the mechanism of stability control for surrounding rock masses.
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    • References (15)
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