Abstract
Long tunnel excavation with tunnel boring machine (TBM) is a complex and stochastic process. It is easily affected by uncertainties and needs to be adjusted according to specific geological conditions in different tunnel sections, which makes the construction scheduling and management difficult. Based on the rock mass classification, this paper estimates the penetration rate. Using the rate, a cyclic network simulation (CYCLONE) model of TBM boring system is established, and the advance rates under different geological conditions are determined. Then, the impact of different cutter head thrust, which is chosen in reasonable range according to previous experiences, on project schedule is analyzed. Moreover, the simulation model of mucking system is built to determine the number of muck trains and rail intersections reasonably, regarding the efficiency of muck loading and material transporting. Based on the interaction and interrelation between TBM boring system and mucking system, the combined CYCLONE model for the entire tunneling process is established. Then reasonable construction schedule, the utilization rate of working resources, and the probability of project completion are obtained through the model programming. At last, a project application shows the feasibility of the presented method.
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Supported by National Natural Science Foundation of China (No.50709024) and Program for New Century Excellent Talents in University (No. NCET-08-0391).
LIU Donghai, born in 1974, male, Dr, associate Prof.
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Liu, D., Zhou, Y. & Jiao, K. TBM construction process simulation and performance optimization. Trans. Tianjin Univ. 16, 194–202 (2010). https://doi.org/10.1007/s12209-010-0035-0
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DOI: https://doi.org/10.1007/s12209-010-0035-0