基于离散元的铣挖法施工关键参数研究  

Research on Key Construction Parameters of Milling Excavation Method Based on Discrete Element

作　　者：谭因军 蒋辉[1] 张志强[1] TAN Yinjun;JIANG Hui;ZHANG Zhiqiang(Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室土木工程学院

出　　处：《路基工程》2019年第4期202-206,共5页Subgrade Engineering

基　　金：四川省科技计划项目(2019YFG0460);国家自然科学基金(51678503,51878572)

摘　　要：以岐山隧道为依托,建立三维离散元数值计算模型,对铣挖法的吃刀深度、截割厚度、截割方式三个施工关键参数进行研究。结果表明:在全风化花岗岩条件下,铣挖机最优吃刀深度为13.0cm;随着截割厚度增大,平均垂直力和平均滚动力均增加,截割厚度12.5cm为艾卡特ER1500-3L铣挖机最大截割厚度;从节能和减少刀具磨损来说,顺切更有利。Based on Qishan tunnel,a three-dimensional discrete element numerical calculation model is established and three key construction parameters of milling excavation method,namely cutting depth,cutting thickness and cutting mode are studied.The results show that under the condition of fully weathered granite,the optimal cutting depth of the milling machine is13.0 cm;with the increase of cutting thickness,the average vertical force and the average rolling force increase and the cutting thickness of12.5 cm is the maximum cutting thickness of Ecatel ER1500-3L milling machine;in terms of energy saving and wear reduction of cutting tool,down cut is more advantageous.

关 键 词：隧道施工 铣挖法 离散元模型 吃刀深度 截割厚度 截割方式 

分 类 号：U455.44[建筑科学—桥梁与隧道工程]