刀盘作为全断面岩石隧道掘进机(Full Face Rock Tunnel Boring Machine,TBM)的直接开挖部件,承受刀具破岩的全部载荷,其强度可靠性是评价TBM刀盘性能的重要指标。受复杂地质条件及刀岩相互作用机制的影响,刀盘在掘进过程中承受的载荷具...刀盘作为全断面岩石隧道掘进机(Full Face Rock Tunnel Boring Machine,TBM)的直接开挖部件,承受刀具破岩的全部载荷,其强度可靠性是评价TBM刀盘性能的重要指标。受复杂地质条件及刀岩相互作用机制的影响,刀盘在掘进过程中承受的载荷具有很强的随机性,故在单一特定工况下研究刀盘的强度性能已无法满足工程需求。鉴于此,本文建立一套随机载荷作用下TBM刀盘强度可靠性的分析方法。基于刀盘-岩石耦合计算模型获取掘进过程中刀具的破岩载荷;对破岩载荷进行统计分析,得到其分布特性及对应参数,并以此为依据构造刀具破岩的随机载荷,采用蒙特卡罗法对刀盘强度的可靠性进行分析。结果表明:安装半径最大的两把正滚刀的破岩载荷对刀盘强度失效的影响最为显著,其权重可达2/3;在常规岩层下高速施工或在硬岩地层维持正常开挖速度,都将显著降低刀盘的强度可靠性。研究结果可为刀盘的地质适应性设计及TBM施工参数控制提供参考。展开更多
The cutterhead system is a core component of TBM equipment,which works in the extremely severe environment,and the strong impact loads result in severe vibration,crack,damage failure and other engineering failures.Acc...The cutterhead system is a core component of TBM equipment,which works in the extremely severe environment,and the strong impact loads result in severe vibration,crack,damage failure and other engineering failures.Accordingly,the key for cutterhead system structure design and parameter matching is to evaluate and predict cutterhead tunneling per-formance reasonably.In this paper,a prediction method for TBM cutterhead dynamic tunneling performance is pro-posed under the typical composite geological conditions,based on the CSM model of multi-cutters and cutter loads field test data.Then an actual TBM cutterhead of a water conservancy project is taken as an example,a spatial three-dimensional separation zone model for cutterhead tunneling is established under the typical geological condition,and the parameters influence rules of cutterhead tunneling performance are analyzed.The results show that,the cutter-head loads and specific energy change rules with different parameters are basically similar.Moreover,under the condi-tion of penetration p=10mm,the cutterhead bending moment coefficient of variation magnitude exceeds 20%,which is the maximum,and the normal cutter spacing optimal value is 95mm.Also,when the normal cutter spacing is kept constant in 85mm,the penetration has a greater influence on the torque and specific energy coefficient of variations,which is increased from 2mm to 10mm,and the two indexes decrease by about 73%.It is indicated that proper increase of pene-tration is beneficial to reduce the vibration fluctuation degree of torque and specific energy.The proposed method of TBM cutterhead dynamic tunneling performance and the analysis results can provide theoretical basis and design refer-ence for TBM cutterhead layout and tunneling parameters matching.展开更多
刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的...刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。展开更多
全断面掘进机刀盘(TBM)是TBM的核心部件,TBM刀盘模型装配过程耗费设计人员大量的时间,不仅降低了刀盘整体设计的效率,还会由于操作人员对各类三维软件的不熟悉而降低刀盘装配的可靠性,因此对TBM刀盘自动装配进行系统开发很有必要。对工...全断面掘进机刀盘(TBM)是TBM的核心部件,TBM刀盘模型装配过程耗费设计人员大量的时间,不仅降低了刀盘整体设计的效率,还会由于操作人员对各类三维软件的不熟悉而降低刀盘装配的可靠性,因此对TBM刀盘自动装配进行系统开发很有必要。对工程上常见的几类典型结构刀盘装配体模型进行Solid Works二次开发做了研究,运用C#语言在Visual Studio 2010环境下进行Windows界面开发,最终开发出TBM刀盘自动装配系统的Solid Works插件,该系统具有自动装配和干涉检查功能,保证了自动装配后的刀盘模型准确、可靠。展开更多
文摘刀盘作为全断面岩石隧道掘进机(Full Face Rock Tunnel Boring Machine,TBM)的直接开挖部件,承受刀具破岩的全部载荷,其强度可靠性是评价TBM刀盘性能的重要指标。受复杂地质条件及刀岩相互作用机制的影响,刀盘在掘进过程中承受的载荷具有很强的随机性,故在单一特定工况下研究刀盘的强度性能已无法满足工程需求。鉴于此,本文建立一套随机载荷作用下TBM刀盘强度可靠性的分析方法。基于刀盘-岩石耦合计算模型获取掘进过程中刀具的破岩载荷;对破岩载荷进行统计分析,得到其分布特性及对应参数,并以此为依据构造刀具破岩的随机载荷,采用蒙特卡罗法对刀盘强度的可靠性进行分析。结果表明:安装半径最大的两把正滚刀的破岩载荷对刀盘强度失效的影响最为显著,其权重可达2/3;在常规岩层下高速施工或在硬岩地层维持正常开挖速度,都将显著降低刀盘的强度可靠性。研究结果可为刀盘的地质适应性设计及TBM施工参数控制提供参考。
基金This work is financially supported by the National Natural Science Foundation of China(51775113)the Natural Science Foundation of Fujian Province,China(2017J01675)Scientific Research Foundation of Fujian University of Technology(GY-Z160048).
文摘The cutterhead system is a core component of TBM equipment,which works in the extremely severe environment,and the strong impact loads result in severe vibration,crack,damage failure and other engineering failures.Accordingly,the key for cutterhead system structure design and parameter matching is to evaluate and predict cutterhead tunneling per-formance reasonably.In this paper,a prediction method for TBM cutterhead dynamic tunneling performance is pro-posed under the typical composite geological conditions,based on the CSM model of multi-cutters and cutter loads field test data.Then an actual TBM cutterhead of a water conservancy project is taken as an example,a spatial three-dimensional separation zone model for cutterhead tunneling is established under the typical geological condition,and the parameters influence rules of cutterhead tunneling performance are analyzed.The results show that,the cutter-head loads and specific energy change rules with different parameters are basically similar.Moreover,under the condi-tion of penetration p=10mm,the cutterhead bending moment coefficient of variation magnitude exceeds 20%,which is the maximum,and the normal cutter spacing optimal value is 95mm.Also,when the normal cutter spacing is kept constant in 85mm,the penetration has a greater influence on the torque and specific energy coefficient of variations,which is increased from 2mm to 10mm,and the two indexes decrease by about 73%.It is indicated that proper increase of pene-tration is beneficial to reduce the vibration fluctuation degree of torque and specific energy.The proposed method of TBM cutterhead dynamic tunneling performance and the analysis results can provide theoretical basis and design refer-ence for TBM cutterhead layout and tunneling parameters matching.
文摘刀盘是硬岩掘进机(TBM)的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷(总推力、总扭矩),其中刀盘扭矩平均值1 560 k N·m,最大值5 880 k N·m,推力平均值3 444 k N,最大值7 296 k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100 MPa,最大变形0.695 mm,确定刀盘有足够的刚度强度。
文摘全断面掘进机刀盘(TBM)是TBM的核心部件,TBM刀盘模型装配过程耗费设计人员大量的时间,不仅降低了刀盘整体设计的效率,还会由于操作人员对各类三维软件的不熟悉而降低刀盘装配的可靠性,因此对TBM刀盘自动装配进行系统开发很有必要。对工程上常见的几类典型结构刀盘装配体模型进行Solid Works二次开发做了研究,运用C#语言在Visual Studio 2010环境下进行Windows界面开发,最终开发出TBM刀盘自动装配系统的Solid Works插件,该系统具有自动装配和干涉检查功能,保证了自动装配后的刀盘模型准确、可靠。
