铁路隧道复合式衬砌极限状态设计研究

发布时间：2018-04-04 00:57

本文选题：铁路隧道　切入点：复合式衬砌　出处：《铁道工程学报》2015年06期

【摘要】：研究目的:随着我国隧道设计施工技术的不断发展,现行《铁路隧道设计规范》规定的极限状态设计法在实际应用中逐现不足,为更好地将可靠度理论应用于实践,本文以铁路隧道复合衬砌部颁通用图为研究对象,对铁路隧道复合式衬砌极限状态设计进行研究。研究结论:(1)建立了更具实用性的铁路隧道衬砌极限状态设计表达式,表达式中不直接含有基本变量的标准值、作用效应和抗力分项系数,但却体现了结构可靠性要求;(2)提出了新的分项系数优化原则与确定方法,并给出了相应的调整系数;(3)当结构自重分项系数取1.0、围岩压力分项系数取1.4时,各类型复合式衬砌的可靠指标与目标可靠指标取得良好的一致性;(4)该研究成果可直接指导铁路复合衬砌极限状态设计并为《铁路隧道设计规范》的修订提供依据。
[Abstract]:Research purpose: with the continuous development of tunnel design and construction technology in China, the limit state design method stipulated in the current "Railway Tunnel Design Code" is not enough in practical application. In order to better apply the reliability theory to practice,Based on the general drawing of railway tunnel compound lining, the limit state design of railway tunnel compound lining is studied in this paper.A more practical expression for the design of the limit state of railway tunnel lining is established. The expression does not contain the standard value of the basic variable directly, the action effect and the partial coefficient of resistance.But it reflects the reliability requirement of the structure, and puts forward a new optimization principle and determination method of the subdivision coefficient, and gives the corresponding adjustment coefficient / 3) when the structural weight sub-coefficient is 1.0, the surrounding rock pressure sub-coefficient is 1.4, and the corresponding adjustment coefficient is given when the structural self-weight sub-coefficient is 1.0, and the surrounding rock pressure sub-coefficient is 1.4.The reliability index of various types of composite lining is in good agreement with the target reliability index. The research results can direct the design of the limit state of railway composite lining and provide the basis for the revision of Railway Tunnel Design Code.
【作者单位】：中铁二院工程集团有限责任公司;北京交通大学;
【基金】：铁道部科技研究开发项目(2012G014-D) 中国中铁股份有限公司科研项目[13164174(12-14)]
【分类号】：U455.91

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