摘要
研究土压平衡(Earth pressure balanced,EPB)盾构机刀盘刀具的布置方法,目的是为了确保刀具结构布置的合理性和实用性。依据刀具磨损的等寿命原则,提出确定刀具数量的磨损系数法和掘进系数法;针对具体施工问题,可预测盾构在开挖区间,刀具的磨损量以及许用磨损情况下刀具的掘进距离,为保障工程的安全顺利进行提供参考。基于阿基米德螺旋线布置方法,计算以刀具磨损的等寿命原则下,主切削刀的布置曲线;提出刀具平面对称布局原则,分析刀具的切削过程,得到单把刀具的实际切深;建立EPB盾构刀盘上先行刀的立体布局方法,计算得到先行刀的超前量;结合南京地铁二号线TA07标段,验证了刀具布置方法的正确性。研究内容和研究方法可为EPB盾构机刀盘的选型和设计奠定理论基础。
To ensure rationality and practicability of the cutter configuration,it is necessary to propose the method of cutting tool layout of earth pressure balance（EPB） shield.According to the equal-life principle of tool wear,the wear coefficient method and tunneling coefficient method are proposed to determine the number of tools;When it comes to a specific construction,it also can predict tool wear condition and the tunneling distance under the allowable attrition in the range of the shield tunnel excavation,which offer a reference for the safety of project;Based on Archimedes spiral layout method,the arrangement curve of drag bits on cutter head should be calculated according to the equal-life principle of tool wear;In order to obtain the actual depth of a cutting tool,the rule of plane symmetry layout of the cutting tool is put forward,and cutting process is analyzed;the first knife＇s three-dimensional arrangement method of the EPB shield is established,the actual cutting depth of a single tool is obtained;The accuracy of the cutting tool layout theory above is investigated with the example of TA07 of Nanjing Metro number two line.The research content and method lay a theoretical foundation for the EPB shield cutter selection and design theory.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第15期161-168,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金(500975194)
国家重点基础研究发展计划(973计划
2007CB714002)资助项目
关键词
土压平衡盾构机
等寿命原则
刀具布置
主切削刀
先行刀
Earth pressure balance shield Equal-life principle Cutter configuration Drag bits First tools
