Influence of Tunnel Boring Machine Scraper Bucket Structure on the Mucking Performance

被引：0
|
作者：
Geng Q. [1 ]
Xie L. [1 ]
Zhang Z. [1 ]
Ye M. [1 ]
Yao Y. [2 ]
机构：
[1] National Engineering Laboratory of Highway Maintenance Equipment, Chang'an University, Xi'an
[2] Technical Center (Chief Engineer Office), Shanxi Road and Bridge Construction Group Co., Ltd., Taiyuan
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2020年 / 54卷 / 11期
关键词：
Muck transfer; Particle-based discrete element method; Scraper bucket; Tunnel boring machine;
D O I：
10.7652/xjtuxb202011018
中图分类号：
学科分类号：
摘要：
In view of the problems existing in the TBM (tunnel boring machine) cutterhead muck transfer simulation research that the grading and shape parameters of rock chips are not considered comprehensively, and the influence of the scraper bucket structure is not clearly revealed, a numerical model of the mucking process including chip falling, shoveling and sliding was built considering the grading and shape of rock chips by using the clump strategy of a particle-based discrete element method, and the numerical model was verified by scaled mucking tests. Numerical simulations were carried out to study the influence of disc cutters, bucket structure, bucket height and bucket width on the cutterhead's mucking performance considering the average mucking speed and passing rate. The simulation results show that the influence of the disc cutters on the mucking process can be ignored. The triangle section type is a more reasonable bucket structure. The recommended value of bucket height is approximately 30-50 mm smaller than the disc cutter height. The recommended value of bucket width is 50% of the width of the chip discharging chute. The numerical model built in this paper provides an effective approach for the study of mucking process of TBM cutterhead, and the conclusions can be used as theoretical basis for the design of scraper buckets. © 2020, China Food Publishing Company. All right reserved.
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页码：149 / 157
页数：8
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