PDF下载

[1]王华伟　康正阳　王英才　刘四进　刘鹏.极硬岩条件下盾构滚刀掘进过程数值模拟[J].油气储运,2024,43(09):1-10.
　WANG HuaweiKANG ZhengyangWANG YingcaiLIU SijinLIU Peng.Numerical simulation study of shield disc cutter tunneling process under extremely hard rock condition[J].Oil & Gas Storage and Transportation,2024,43(09):1-10.

点击复制

极硬岩条件下盾构滚刀掘进过程数值模拟

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年09期页码: 1-10 栏目: 出版日期: 2024-09-25

Title:: Numerical simulation study of shield disc cutter tunneling process under extremely hard rock condition

作者:: 王华伟　康正阳　王英才　刘四进　刘鹏

Author(s):: WANG Huawei　KANG Zhengyang　WANG Yingcai　LIU Sijin　LIU Peng

关键词:: 盾构机; 极硬岩; 滚刀; 有限元法

Keywords:: shield machine; extremely hard rock; disc cutter; finite element simulation

分类号:: TE89

文献标志码:: A

摘要:: 【目的】有限元法（Finite Element Method, FEM）是研发新型硬岩滚刀的常用方法，为构建合理的新型硬岩滚刀有限元模型以获得较高的计算精度及计算效率开展探究。【方法】从岩石破碎学、材料学出发，针对芜湖过江工程中19寸光面滚刀、长三角区域混合花岗岩岩层条件，构建盘形滚刀的有限元线性切割模型；并引入网格密度因子λ，通过网格局部加密技术实现λ在0.5~4之间取值，将不同取值下的计算结果与学者Rostami所修正的CSM（Cutting Stress Model）理论模型进行对比。【结果】虽然λ的取值对滚刀有限元模型的破岩规律无明显影响，但超前破坏效应及过度破坏效应均与λ有关，因此有限元模型的计算精度与计算效率均对λ取值较为敏感：对于计算精度而言，平均滚动力及平均垂直力的计算精度随λ增大呈先下降后上升的趋势，λ=2.5时有限元模型与CSM理论模型的平均垂直力最为接近，接近度为98.5%，λ=3.0时两模型的平均滚动力最为接近，接近度为99.8%；对于计算效率而言，有限元模型的计算求解时间随λ增大呈上升趋势，λ=4.0时的求解时间约为λ=0.5时的15倍，且存在较优λ取值能够兼顾求解精度及求解效率。【结论】仿真研究中应选取λ=3.0作为有限元模型的最优网格密度因子，其计算效率比λ=2.5时可提升近30%，研究结果可为计算精度与计算效率更高的新型硬岩滚刀有限元模型的建立提供理论框架。

Abstract:: [Objective]The finite element method (FEM) is a common method for the development of new hard rock hob cutters, and this paper explores the construction of a reasonable finite element model of new hard rock hob cutters to obtain high calculation accuracy and efficiency.[Methods]Based on rock fragmentation and materials science, aiming at the conditions of 19-inch smooth disc cutter in Wuhu River crossing project and mixed granite rock formation in the Yangtze River Delta region, the finite element linear cutting model of the disc disc cutter was constructed, and the grid density factor λ was introduced, and the value of λ was realized between 0.5~4 through the grid local encryption technology, and the calculation results under different values were compared with the CSM (Cutting Stress Model) theoretical model modified by the scholar Rostami.[Results]Although the value of λ has no obvious effect on the rock breaking law of the finite element model of the hob cutter, the advanced failure effect and the excessive failure effect are related to λ, so the calculation accuracy and computational efficiency of the finite element model are more sensitive to the value of λ: for the calculation accuracy, the calculation accuracy of the average rolling force and the average vertical force decreases first and then increases with the increase of λ, and the average vertical force of the finite element model and the CSM theoretical model is the closest when λ=2.5, with a closeness of 98.5%, λ=At 3.0, the average rolling force of the two models is the closest, with a closeness of 99.8%, and in terms of computational efficiency, the calculation and solution time of the finite element model increases with the increase of λ, and the solution time of λ=4.0 is about 15 times that of λ=0.5, and there is an optimal λ value that can take into account the solution accuracy and solving efficiency.[Conclusion]λ=3.0 should be selected as the optimal mesh density factor of the finite element model in the simulation study, and its computational efficiency can be improved by nearly 30% compared with λ=2.5, and the research results can provide a theoretical framework for the establishment of a new finite element model of hard rock hob cutter with higher calculation accuracy and computational efficiency.

相似文献/References:

[1]孙利强马鑫.盾构机推力过大原因分析与应对措施[J].油气储运,2013,32(6):604.[doi:10.6047/j.issn.1000-8241.2013.06.009]
　Sun Liqiang,Ma Xin.Causes and countermeasures against excessive thrust of shield machine[J].Oil & Gas Storage and Transportation,2013,32(09):604.[doi:10.6047/j.issn.1000-8241.2013.06.009]
[2]王华伟,康正阳,王英才,等.极硬岩条件下盾构滚刀掘进过程数值模拟[J].油气储运,2024,43(07):819.[doi:10.6047/j.issn.1000-8241.2024.07.011]
　WANG Huawei,KANG Zhengyang,WANG Yingcai,et al.Numerical simulation study of tunneling process using TBM disc cutter under extremely hard rock condition[J].Oil & Gas Storage and Transportation,2024,43(09):819.[doi:10.6047/j.issn.1000-8241.2024.07.011]

更新日期/Last Update: 2024-04-11