冲积物地质下的盾构机刀盘系统技术研究与仿真分析
发布时间：2018-07-26 06:19
【摘要】：随着国家经济建设的蓬勃发展,发达城市的城市地下轨道交通建设正日新月异。然而地铁隧道的建设存在危险性,因而建立有效的安全风险管控体系迫在眉睫。本文列举了城市地下轨道交通建设中所面临的具体风险及为了减少风险可以采取的措施,另外还详尽探讨了地下隧道施工中的可采用的各种施工方法,并对其比较选出适应于城市地下轨道交通建设的施工方法-盾构施工法。首先探讨了在盾构施工法中盾构机的选择,根据北京地区的地质条件及不同岩土体的物理和力学特性,阐述了三种不同类型盾构机在北京地层下的施工适应性问题,重点对土压平衡盾构机在此地质条件下的施工适应性进行了论证。根据北京地铁4号线14标段的工程地质条件选择了具体的机型-日本石川岛播磨株式会社制造的?14.6加泥式土压平衡盾构机。随后以日本石川岛播磨株式会社制造的?14.6加泥式土压平衡式盾构机为研究对象,做了如下工作:首先,完成刀盘结构设计,运用刀盘开口率相关知识,依据刀盘开口率设计原则,刀盘开口率与刀盘选型和掘进参数的关系及相关设计理论,确定了本标段地铁建设中适用的刀盘开口率范围。其次完成了刀盘上刀具的选择,刀具数量计算,刀具布置方式等工作。然后将盾构推力与刀盘扭矩计算模型应用于北京地铁4号线14标段双榆树至动物园区间盾构推力和刀盘扭矩计算,计算出的推力扭矩值为机台载荷校验和进一步的刀盘有限元分析提供载荷条件。最后使用三维建模软件Pro/E 4.0野火版对刀盘系统的各个零部件进行了数字化建模与装配,利用有限元软件ANSYS 12.1对刀盘系统进行结构静力学分析,分析三种典型工况下刀盘的应力状况,各部分的变形情况,找出结构中受力和变形薄弱点,对其进行强度,刚度校核,进行了刀盘的模态分析,验证了结构动力学特性。通过对盾构机刀盘设计技术的研究和应用,验证了上述研究成果的正确性,依此技术和理论设计出了北京地铁4号线所使用的加泥式土压平衡盾构机刀盘,相关的研究将推动土压平衡盾构机刀盘国产化和产业化的发展。
[Abstract]:With the vigorous development of national economic construction, urban underground rail transit construction in developed cities is changing with each passing day. However, the construction of subway tunnel is dangerous, so it is urgent to establish an effective safety risk management system. This paper enumerates the specific risks faced in the construction of urban underground rail transit and the measures that can be taken in order to reduce the risks. In addition, it also discusses in detail the various construction methods that can be used in the construction of underground tunnels. The shield construction method, which is suitable for the construction of urban underground rail transit, is selected. Firstly, the selection of shield machine in shield construction method is discussed. According to the geological conditions in Beijing area and the physical and mechanical characteristics of different rock and soil mass, the construction adaptability of three different types of shield machines under Beijing stratum is expounded. The construction adaptability of earth pressure balance shield machine under this geological condition is demonstrated. According to the engineering geological conditions of No. 14 section of Beijing Metro Line No. 4, the specific model of the shield machine, which is made by Ishikawa Island Broadcasting and Grinding Co., Ltd., is selected, which is made by Shikawa Island Broadcasting and Grinding Co., Ltd. Then, taking the shield machine made by Shikawa Island sowing Mill Co., Ltd., as the research object, the following work has been done: firstly, the structure design of the cutter head is completed, and the relevant knowledge of the cutting head opening rate is used. According to the design principle of cutter head opening rate, the relationship between cutter head opening rate and cutter head selection and tunneling parameters, and the relevant design theory, the applicable range of cutter head opening rate in subway construction of this section is determined. Secondly, the selection of cutters on the cutter head, the calculation of the number of cutters and the layout of the cutters are completed. Then, the calculation model of shield thrust and cutter head torque is applied to the calculation of shield thrust and cutter head torque between Shuangyu and Zoo in the 14th section of Beijing Metro Line 4. The calculated thrust torque provides the load condition for the load check and the further finite element analysis of the cutter head. Finally, the 3D modeling software Pro/E 4.0 was used to model and assemble the components of the cutter disk system, and the finite element software ANSYS 12.1 was used to analyze the structural statics of the cutter disk system. This paper analyzes the stress condition of the cutter head under three typical working conditions, the deformation of each part, finds out the weakness of force and deformation in the structure, verifies the strength and stiffness of the cutter head, and carries out the modal analysis of the cutter head, which verifies the dynamic characteristics of the structure. Through the research and application of the cutter head design technology of shield machine, the correctness of the above research results is verified. According to this technology and theory, the cutter head of the earth pressure balance shield machine with mud type used in Beijing Metro Line 4 is designed. The related research will promote the development of localization and industrialization of the cutlery of earth pressure balance shield machine.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U455.39
本文编号：2145137
[Abstract]:With the vigorous development of national economic construction, urban underground rail transit construction in developed cities is changing with each passing day. However, the construction of subway tunnel is dangerous, so it is urgent to establish an effective safety risk management system. This paper enumerates the specific risks faced in the construction of urban underground rail transit and the measures that can be taken in order to reduce the risks. In addition, it also discusses in detail the various construction methods that can be used in the construction of underground tunnels. The shield construction method, which is suitable for the construction of urban underground rail transit, is selected. Firstly, the selection of shield machine in shield construction method is discussed. According to the geological conditions in Beijing area and the physical and mechanical characteristics of different rock and soil mass, the construction adaptability of three different types of shield machines under Beijing stratum is expounded. The construction adaptability of earth pressure balance shield machine under this geological condition is demonstrated. According to the engineering geological conditions of No. 14 section of Beijing Metro Line No. 4, the specific model of the shield machine, which is made by Ishikawa Island Broadcasting and Grinding Co., Ltd., is selected, which is made by Shikawa Island Broadcasting and Grinding Co., Ltd. Then, taking the shield machine made by Shikawa Island sowing Mill Co., Ltd., as the research object, the following work has been done: firstly, the structure design of the cutter head is completed, and the relevant knowledge of the cutting head opening rate is used. According to the design principle of cutter head opening rate, the relationship between cutter head opening rate and cutter head selection and tunneling parameters, and the relevant design theory, the applicable range of cutter head opening rate in subway construction of this section is determined. Secondly, the selection of cutters on the cutter head, the calculation of the number of cutters and the layout of the cutters are completed. Then, the calculation model of shield thrust and cutter head torque is applied to the calculation of shield thrust and cutter head torque between Shuangyu and Zoo in the 14th section of Beijing Metro Line 4. The calculated thrust torque provides the load condition for the load check and the further finite element analysis of the cutter head. Finally, the 3D modeling software Pro/E 4.0 was used to model and assemble the components of the cutter disk system, and the finite element software ANSYS 12.1 was used to analyze the structural statics of the cutter disk system. This paper analyzes the stress condition of the cutter head under three typical working conditions, the deformation of each part, finds out the weakness of force and deformation in the structure, verifies the strength and stiffness of the cutter head, and carries out the modal analysis of the cutter head, which verifies the dynamic characteristics of the structure. Through the research and application of the cutter head design technology of shield machine, the correctness of the above research results is verified. According to this technology and theory, the cutter head of the earth pressure balance shield machine with mud type used in Beijing Metro Line 4 is designed. The related research will promote the development of localization and industrialization of the cutlery of earth pressure balance shield machine.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U455.39
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