双轮铣槽机铣削过程及截齿入岩顺序优化研究
Study on milling process and optimization of pick entry sequence of double-wheel trench cutter
查看参考文献44篇
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文摘
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双轮铣槽机(简称"双轮铣")是地下连续墙的专业施工装备,布齿系统是其核心部件,其参数设计与破岩性能密切相关。基于连续-非连续单元法(CDEM),建立了铣轮铣削岩土体过程的三维仿真模拟方法。在此基础上,考虑自由面与铣削关联性等因素,对布齿系统截齿入岩顺序影响破岩性能机制进行了研究,建立了关联铣削条件下以预置相邻自由面数目为主要影响因素的入岩顺序数值概化模型。结果表明:(1)获得的铣轮铣削岩土体的铣削力与铣削深度曲线,验证了此数值模拟方法的正确性;(2)相比于完整岩体,具有单相邻预设自由面与双相邻预设自由面岩样的峰值荷载分别下降了32.5%与68.2%,破岩能耗分别下降了19.8%与56.6%;(3)布齿系统中双相邻预设自由面的截齿占总体截齿数目比值越大,布齿系统整体能耗越低,异构式布齿系统能耗低于顺序式。研究成果为完善双轮铣槽机破岩过程与布齿系统优化提供了基础。 |
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其他语种文摘
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Double-wheel trench cutter is a professional construction equipment of underground diaphragm wall, and its tooth arrangement system is its core component. The parameter design of tooth arrangement system is closely related to rock breaking performance. In this study, a three-dimensional simulation method for milling rock and soil with milling wheel is developed using the continuum-discontinuum element method(CDEM). On this basis, considering the correlation between free surface and milling, the mechanism of the influence of cutting sequence on rock breaking performance of tooth arrangement system is studied, and a numerical generalization model of rock entry sequence is established under the condition of associated milling, in which the number of adjacent free surfaces is preset as the main influencing factor. The results show that:(1)The curves of milling force and milling depth obtained by milling wheel milling rock and soil mass verify the correctness of the numerical simulation method.(2)Compared with the intact rock mass, the peak load of rock samples with single adjacent preset free surface and double adjacent preset free surface decreased by 32.5% and 68.2% respectively, and the energy consumption of rock breaking decreased by 19.8% and 56.6%, respectively.(3)In the tooth arrangement system, the larger the ratio of the double adjacent preset free surfaces to the total number of picks, the lower the overall energy consumption of the tooth arrangement system, and the energy consumption of the heterogeneous tooth arrangement system is lower than that of the sequential one. The research results provide a basis for improving the rock breaking process and tooth arrangement system optimization of double-wheel trench cutter. |
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来源
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岩土力学
,2022,43(4):981-994 【核心库】
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DOI
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10.16285/j.rsm.2021.1025
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关键词
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双轮铣槽机
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布齿系统
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优化应用
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连续-非连续单元法(CDEM)
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地址
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1.
中国科学院武汉岩土力学研究所, 岩土力学与工程国家重点实验室, 湖北, 武汉, 430071
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中国科学院大学, 北京, 100049
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中国科学院力学研究所, 中国科学院流固耦合系统力学重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-7598 |
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学科
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建筑科学 |
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基金
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国家自然科学基金
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中国科学院基础前沿科学研究计划
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中国科学院科技服务网络计划(STS计划)项目
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华能集团科技项目
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文献收藏号
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CSCD:7195897
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