铁道标准设计2017，Vol.61Issue(11)：85-90,6.DOI:10.13238/j.issn.1004-2954.2017.11.018
基于离散元数值模拟的砂卵石地层盾构掘进刀盘磨损特性研究
Study on Cutterhead Wear Characteristics in Shield Tunneling in Sandy Pebble Stratum Based on Discrete Element Numerical Simulation
马腾1
作者信息
- 1. 中铁第一勘察设计院集团有限公司,西安710043
- 折叠
摘要
Abstract
Sandy pebble stratum is composed of a large number of particles and a typical unstable stratum characterized by discontinuity,non-cohesion,macroporosity and generally high uniaxial compressive strength.Severe friction between the cutterhead and the particles results in serious tool wear when the cutter is working.Based on Lanzhou metro line 1,the law of cutterhead wear in the case of different forms of cutter and covering soil thickness is studied by software EDEM of discrete element numerical simulation.The results show that the wear is inhomogeneous and more severe in the periphery of the cutterhead,and the maximum wear of the spoke shield cutter is 0.7 ～ 0.8 times of that of the panel hield cutter,and the tool wear with covering soil thickness 1.5 D model is about 1.15 times of that of the 1 D model.关键词
盾构施工/砂卵石/离散元/参数标定/刀盘磨损/EDEMKey words
Shield tunneling/Sandy pebble/Discrete element/Parameter calibration/Cutterhead wear/EDEM分类
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马腾..基于离散元数值模拟的砂卵石地层盾构掘进刀盘磨损特性研究[J].铁道标准设计,2017,61(11):85-90,6.
