Abstract
Based on digital image technology and discrete Fourier transform theory, identification, dispersion and reconstruction of two-dimensional contour of natural stone were realized. Combined with fractal theory, a convenient method for generating soil-rock mixture stratum was designed according to the specified block size, stone content and fractal dimension. On this basis, a numerical model of soil-rock mixture stratum was established to study the deformation characteristics of stratum during tunnel excavation. The calculation results indicate that compared to the traditional homogeneous model, soil and rock mixture model is able to show the effects of stone on tunnel face deformation and ground settlement, which means it can offer a better description of the deformation law of the surrounding rock mass in the soil-rock mixture stratum. Different from the single plastic zone described in the homogeneous model, there is an obvious"rock around effect"in the development of the plastic zone, which is behind the tunnel face, in the soil-rock mixture model, and its expansion paths are more complex, multivariate and have longer sliding paths. To a certain extent, the characteristics mentioned above will increase the influence range of the tunnel construction disturbance.
| Translated title of the contribution | Stratum construction method of random soil rock mixture and its application |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 35-40 and 45 |
| Journal | Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) |
| Volume | 46 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 23 Apr 2018 |
| Externally published | Yes |
Keywords
- Construction method
- Digital image technology
- Discrete Fourier transform
- Soil-rock mixture
- Stratum deformation
ASJC Scopus subject areas
- General Computer Science