Abstract The numbers of mucking chute, revolutions per minute (RPM) and muck shapes are important factors that affect the muck transfer ability and stability of TBM. In the research of TBM muck transportation, the muck is usually simplified as rigid spherical particles, thus ignoring the influence of the real shape of the particles on the transportation process. In order to simulate the real shapes of TBM muck in the numerical simulation, this paper used close-range photogrammetry, quantitative analysis of particle shapes to extract the particle shape characteristics of real muck. According to the characteristics of particle shape, the muck with real particle shape was reconstructed in three dimensions using particle reconstruction technology. Then, the reconstructed mucks were imported into the discrete element software program to generate a collection of real muck with irregular shapes. A TBM muck transfer model was constructed, and a three-dimensional simulation of TBM muck transfer process was conducted. Otherwise，the influence of RPM and the numbers of mucking chute on the muck transfer capacity of TBM was quantitatively analyzed through the proposed numerical simulation method. The research results have certain guiding significance for the design of the numbers of mucking chute of TBM in the actual project and the TBM operation of the muck transfer.
Abstract：
The numbers of mucking chute, revolutions per minute (RPM) and muck shapes are important factors that affect the muck transfer ability and stability of TBM. In the research of TBM muck transportation, the muck is usually simplified as rigid spherical particles, thus ignoring the influence of the real shape of the particles on the transportation process. In order to simulate the real shapes of TBM muck in the numerical simulation, this paper used close-range photogrammetry, quantitative analysis of particle shapes to extract the particle shape characteristics of real muck. According to the characteristics of particle shape, the muck with real particle shape was reconstructed in three dimensions using particle reconstruction technology. Then, the reconstructed mucks were imported into the discrete element software program to generate a collection of real muck with irregular shapes. A TBM muck transfer model was constructed, and a three-dimensional simulation of TBM muck transfer process was conducted. Otherwise，the influence of RPM and the numbers of mucking chute on the muck transfer capacity of TBM was quantitatively analyzed through the proposed numerical simulation method. The research results have certain guiding significance for the design of the numbers of mucking chute of TBM in the actual project and the TBM operation of the muck transfer.
DU Hongjin1 XIONG Hao2,
3 ZHOU Hao1 ZENG Deqi4
.Numerical Reconstruction of TBM Muck with Real Shape and Numerical Simulation of Muck Transfer Process[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(5): 34-40
2022, Vol. 59 