Modelling of ventilation and dust control effects during tunnel construction. (September 2019)

• Record Type: Journal Article
• Authors: Zhou, Wenjie; Nie, Wen; Liu, Changqi; Liu, Qiang; Hetang, Wang; Wei, Cunhou; Yan, Jiayi; Yin, Shuai; Xiu, Zihao; Xu, Changwei
• Is Part Of: International journal of mechanical sciences. Volume 160(2019)
• Page Start: 358
• Page End: 371
• Publication Date: 2019-09
• Subjects: Numerical simulation -- Orthogonal experimental design -- Shield tunneling machine -- Ventilation system -- Dust removal effect -- Optimization; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2019.06.037
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: Established a full-scale, 3D model of the shield machine. Experiment result of simulation of the airflow-dust coupling field was analyzed. Field measurements verify the accuracy of numerical simulation. The optimization model is obtained by orthogonal experiment. Abstract: A large amount of dust is mainly generated during the construction of the shield tunneling machine. In order to achieve the optimal dust removal effect, this research took the shield section of Jiaozhou North Station of Qingdao Metro Line No. 8 to Jiaodong Airport Station (China) as a case study. For this purpose, the numerical simulation and orthogonal design were undertaken to optimize the parameters of the ventilation and dust removal system for a shield tunneling machine, and to study the influence of each parameter on the dust removal from three aspects, including the distance of pressure tuyere, the air volume of the pressure tuyere, and the distance of the air inlet. The results of the analysis showed that the distance of the pressure tuyere is the main parameter to control the dust removal, and the two other factors had both less influence on the dust removal. The numerical simulation of the optimal method showed that it outperformed on dust removal than the actual working conditions. This research provided a theoretical basis and direction for optimizing the performance of a ventilation and dust removal system. Graphical abstract: Image, graphical abstract