摘要
以某城市地铁施工EPB盾构机为研究对象,针对刀盘挖掘速度、旋转速度和土体切削率之间的关系进行盾构机施工效率提升优化研究。采用通用有限元分析软件建立土体和盾构刀盘的三维模型。土体模型基于非线性Drucker-Pragel模型屈服准则,应用ALE法处理大范围的土体变形和破坏问题。应用ABAQUS模拟刀盘切削土体的过程,对土体在刀盘切削工况下的Mises应力、等效塑性应变(PEEQ)和质量切削率进行分析,并对试验数据进行回归分析。结果表明:刀盘在对同种土体进行切削时,随着转速的增大,其轴向力和对应力矩都呈现出先增加后减少的趋势,其中刀盘轴向力的变化范围为0~300 kN,刀盘轴向力的变化范围为0~300 kN/m。通过回归分析得出刀盘挖掘速度、旋转速度和土体切削率之间的函数关系并计算出盾构机挖掘效率最优的系统挖掘参数组合为刀盘转速6 r/min和挖掘速度10 mm/min。
By taking the construction of EPB shield machine in a certain metro line as an example, the relationship between cutting speed, rotation speed and cutting rate of soil is analyzed. The finite element analysis software was used to establish the three-dimensional models of the soil and the cutter head respectively. The soil model was based on the yield criterion of nonlinear Drucker-Pragel model, the ALE method was used to deal with the deformation and failure of soil mass in a large range. ABAQUS was used to simulate the process of cutting soil with cutter head, the Mises stress, equivalent plastic strain(PEEQ) and cutting rate of soil under the cutting condition of the cutter head are analyzed, the experimental data were analyzed by regression analysis. The results show that when the cutter head is in the same soil, as the speed increases, the variation range of the axial force of the cutter head is 0~300 kN, and the variation range of the axial force of the cutter head is 0~300 kN/m. Through regression analysis, the functional relationship between the cutting speed, rotation speed and the cutting rate of soil was obtained, the optimal system mining parameter combination of shield tunneling machine mining efficiency is as follows: the cutter spin speed is 6 r/min and the digging speed is 10 mm/min.
作者
何同继
张怀鹏
苏留锁
赵光营
谢皆睿
HE Tongji;ZHANG Huaipeng;SU Liusuo;ZHAO Guangying;XIE Jierui(China Railway 16th Bureau Group Beijing Rail Transit Engineering Construction Co.,Ltd.,Beijing 100018,China)
出处
《水利与建筑工程学报》
2019年第6期158-163,共6页
Journal of Water Resources and Architectural Engineering
基金
天津市自然科学基金项目(17JCYBJC42400)
