Geomechanics and Engineering

Techno-Press (테크노프레스)
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Effect of underground stress transfer through artificial manipulation of particle size distribution

  • Received : 2020.12.18
  • Accepted : 2021.07.13
  • Published : 2021.07.25
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Abstract

To maintain the stability of built structures, engineers employ various methods to increase ground strength. One such method is to exert mutual physical force upon a structure, thereby stabilizing it without external reinforcement. Typical examples include the stone mastic asphalt method and torsional structured stonework. By simulating a structural phenomenon, it is possible to increase the ground's strength simply by manipulating the distribution and spatial arrangement of soil particles; soil composed of two differently sized particles satisfying a specific ratio does not separate easily. The jamming of soil particles utilizes Plato's regular polyhedron model and assumes that soil particles are complete spheres. Larger soil particles are placed at each vertex of a regular polyhedron and smaller particles in the voids' center. All soil particles come into contact with each other, thereby inducing an interlocking effect. When applied to soil, the particle size distribution is found to be gap-graded. This study investigates this mechanism by using numerical analysis and centrifuge tests to initiate the interlocking effect by distributing gap-graded particles and conducting plate-load tests to verify the ground reinforcement effect.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2019R1A2B5B01069992).

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