Optimal design for buckets layout based on muck removal analysis of TBM cutterhead  

基于全断面岩石掘进机刀盘出碴分析的出碴槽布置优化设计

作　　者：YANG Mei XIA Yi-min LIN Lai-kuang QIAO Shuo JI Zhi-yong 杨妹;夏毅敏;林赉贶;乔硕;暨智勇(School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [2]State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China

出　　处：《Journal of Central South University》2020年第6期1729-1741,共13页中南大学学报（英文版）

基　　金：Project(51475478)supported by the National Natural Science Foundation of China;Project(2012AA041801)supported by the National High Technology Research and Development Program of China;Project(2014FJ1002)supported by the Science and Technology Major Project of Hunan Province,China;Project(2013CB035401)supported by the National Basic Research Program of China。

摘　　要：The layout of the buckets for tunnel boring machine(TBM)directly affects the muck removal efficiency of cutterhead during excavation.In order to improve the muck removal performance for TBM,the optimal design of bucket layout was investigated.The whole muck transfer process was simulated by discrete-element method(DEM),including the muck falling,colliding,pilling up,shoveling and transferring into the hopper.The muck model was established based on size distribution analysis of muck samples from the water-supply tunnel project in Jilin Province,China.Then,the influence of the bucket number and the interval angle between buckets on muck removal performance was investigated.The results indicated that,as the number of buckets increased from four to eight,the removed muck increased by 29%and the residual volume decreased by 40.5%,and the process became steadier.Different interval angles between buckets were corresponding to different removed muck irregularly,but the residual muck number increased generally with the angles.The optimal layout of buckets for the cutterhead in this tunnel project was obtained based on the simulation results,and the muck removal performance of the TBM was verified by the actual data in the engineering construction.在TBM掘进过程中,出碴槽布置直接影响刀盘出碴性能。为了提高TBM的出碴性能,对出碴槽最优布置进行了研究。采用离散元方法对TBM出碴过程进行数值模拟,包括岩碴掉落、与滚刀碰撞、被铲刀铲起以及运送到皮带机排出的全过程。基于吉林输水隧道工程的岩碴样本进行粒径分布分析,建立岩碴颗粒模型,得到出碴槽数量和相邻出碴槽间隔角度对出碴性能的影响规律。结果表明,当出碴槽数量从4个增加至8个时,出碴量增加了29%,残余岩碴量减少40.5%且出碴过程更稳定。出碴量随出碴槽间隔角度的变化不大,但残余出碴量随着间隔角度的增大而逐渐增多。根据仿真研究,得到了该隧道工程刀盘出碴槽的最优布置方案,并通过隧道实际施工数据验证了优化后TBM的出碴性能。

关 键 词：optimal design buckets layout discrete element method muck removal performance tunnel boring machine 

分 类 号：U455.31[建筑科学—桥梁与隧道工程]