全断面隧道掘进机刀盘刮碴铲斗结构对出碴性能的影响  

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

作　　者：耿麒 谢立扬[1] 张泽宇[1] 叶敏[1] 姚永春 GENG Qi;XIE Liyang;ZHANG Zeyu;YE Min;YAO Yongchun(National Engineering Laboratory of Highway Maintenance Equipment,Chang’an University,Xi’an 710064,China;Technical Center(Chief Engineer Office),Shanxi Road and Bridge Construction Group Co.,Ltd.,Taiyuan 030006,China)

机构地区：[1]长安大学公路养护装备国家工程实验室,西安710064 [2]山西路桥建设集团有限公司技术中心(总工办),太原030006

出　　处：《西安交通大学学报》2020年第11期149-157,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金青年科学基金资助项目(51805042);中国博士后科学基金资助项目(2019M663600);陕西省自然科学基础研究计划青年一般资助项目(2019JQ-087)。

摘　　要：针对现有全断面隧道掘进机(TBM)刀盘出碴模拟研究所存在的岩碴级配和形状参数考虑不全面、刮碴铲斗结构影响规律揭示不明晰的问题,采用颗粒离散元方法构建考虑了岩碴级配和形状的刀盘落碴、铲碴、溜碴过程的数值模型,并进行缩比出碴试验验证了数值模型的可靠性。进行数值模拟研究了刀盘有无滚刀、铲斗结构形式、铲斗高度、铲斗宽度等因素对以平均出碴速度和出碴率为评价指标的刀盘出碴性能的影响规律。仿真结果表明:滚刀群对出碴过程影响可以忽略不计;三角截面式是较为合理的铲斗结构形式;铲斗高度的建议取值为滚刀高度减去30~50mm;铲斗宽度的建议取值为出碴口宽度的50%。该模型为TBM刀盘出碴性能研究提供了有效手段,为TBM刀盘出碴结构的设计提供了理论依据。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.

关 键 词：全断面隧道掘进机 出碴 刮碴铲斗 颗粒离散元 

分 类 号：TU94[建筑科学—建筑技术科学]