基于可靠度理论的铁路隧道洞门极限状态设计方法
|
摘要
针对铁路隧道洞门结构稳定性极限状态功能函数具有非线性及其参数具有随机性的特点,提出了基于可靠度理论的铁路隧道洞门结构设计方法.通过分析铁路隧道洞门的极限状态,建立了其极限状态方程.基于可靠度理论,以时速140 km/h的单线电气化铁路隧道端墙式洞门可靠指标计算为例,根据采用同样方法对3种设计时速共16种形式、22种类别隧道洞门的可靠指标计算结果,确定各极限状态下的目标可靠指标,建立极限状态设计式,求解并优化抗力分项系数.研究结果表明:铁路隧道洞门主要有抗裂、抗压、倾覆、滑动和地基承载力不足5种极限状态;极限状态方程中基本随机变量的统计特征是铁路隧道洞门可靠度设计是否准确的关键,可靠指标的确定是洞门结构极限状态设计的核心;建立的极限状态设计方法可直接用于铁路隧道洞门结构设计.
From the characteristics that limit state functions for the stability of a railway tunnel portal structure are nonlinear and the parameters are random,a new design method for railway tunnel portal structures was put forward based on the reliability theory. Limit state equations for railway tunnel portal structures were founded by analyzing the limit states of railway tunnel portal. Based on the reliability theory,reliability indices of a single-track railway tunnel portal with a design speed of 140 km / h were calculated as an example,target reliability indices for different limit states were determined from the calculated reliability indices of railway tunnel portal under three design speeds,including 16 kinds of portal forms and 22 kinds of portal categories,and partial resistance coefficients were calculated and optimized based on establishing the design expressions for different limit states. The research results show that major limit states of railway tunnel portal are cracking,crushing,overturning stability,sliding stability and insufficient foundation bearing capacity; the statistical characteristics of basic random variables in the limit state equations are the key whether reliability design of railway tunnel portal is accurate or not,and the determination of the reliability indices is the core issue in the limit state design of railway tunnel portal. The established method can be directly used to the limit statedesign of railway tunnel portal.
From the characteristics that limit state functions for the stability of a railway tunnel portal structure are nonlinear and the parameters are random,a new design method for railway tunnel portal structures was put forward based on the reliability theory. Limit state equations for railway tunnel portal structures were founded by analyzing the limit states of railway tunnel portal. Based on the reliability theory,reliability indices of a single-track railway tunnel portal with a design speed of 140 km / h were calculated as an example,target reliability indices for different limit states were determined from the calculated reliability indices of railway tunnel portal under three design speeds,including 16 kinds of portal forms and 22 kinds of portal categories,and partial resistance coefficients were calculated and optimized based on establishing the design expressions for different limit states. The research results show that major limit states of railway tunnel portal are cracking,crushing,overturning stability,sliding stability and insufficient foundation bearing capacity; the statistical characteristics of basic random variables in the limit state equations are the key whether reliability design of railway tunnel portal is accurate or not,and the determination of the reliability indices is the core issue in the limit state design of railway tunnel portal. The established method can be directly used to the limit statedesign of railway tunnel portal.
引文
[1]周佳媚.隧道洞门结构土压力的研究[D].成都:西南交通大学土木工程学院,2004.
[2]张清,王东元,李建军.铁路隧道衬砌结构可靠度分析[J].岩石力学与工程学报,1994,13(3):209-218.ZHANG Qing,WANG Dongyuan,LI Jianjun.Reliability analysis of lining structures in Chinese railroad tunnels[J].Chinese Journal of Rock Mechanics and Engineering,1994,13(3):209-218.
[3]景诗庭.地下结构可靠度分析研究之进展[J].石家庄铁道学院学报,1995,8(2):13-18.JING Shiting.The advance of reliability research of underground structure[J].Journal of Shijiazhuang Railway Institute,1995,8(2):13-18.
[4]谭忠盛,高波,关宝树.偏压隧道衬砌结构可靠度分析[J].西南交通大学学报,1996,31(6):21-27.TAN Zhongsheng,GAO Bo,GUAN Baoshu.The structural reliability analysis of bias tunnel lining[J].Journal of Southwest Jiaotong University,1996,31(6):21-27.
[5]谭忠盛.隧道支护结构体系可靠度的理论研究及其工程应用[D].成都:西南交通大学土木工程学院,1998.
[6]周佳媚,严松宏,王英学.单线铁路隧道洞门结构分项系数的研究[J].西南交通大学学报,2001,36(5):505-508.ZHOU Jiamei,YAN Songhong,WANG Yingxue.Analysis of partial coefficients of single-track railway tunnel portal structures[J].Journal of Southwest Jiaotong University,2001,36(5):505-508.
[7]谭忠盛.隧道洞门土压力的离心模型试验及计算模式不定性[J].西部探矿工程,2001(4):76,77.
[8]谭忠盛.隧道洞门抗滑模型试验及可靠度分析[J].兰州铁道学院学报:自然科学版,2001,20(3):4-7.TAN Zhongsheng.A model experiment on the anti-sliding property of tunnel door and research on its reliability[J].Journal of Lanzhou Railway University:Natural Sciences,2001,20(3):4-7.
[9]李伦贵,高波.翼墙式隧道洞门可靠性分析[J].西南交通大学学报,2002,37(5):496-499.LI Lungui,GAO Bo.Reliability analysis of wing wall tunnel portal[J].Journal of Southwest Jiaotong University,2002,37(5):496-499.
[10]铁道第二勘察设计院.TB 10003—2005铁路隧道设计规范[S].北京:中国铁道出版社,2005.
[11]宋玉香,景诗庭,朱永全.隧道结构系统可靠度研究[J].岩土力学,2008,29(3):780-784.SONG Yuxiang,JING Shiting,ZHU Yongquan.Research on reliability of tunnel structural system[J].Rock and Soil Mechanics,2008,29(3):780-784.
[12]魏新欣,丁文其.公路隧道概率极限状态设计方法[J].公路交通科技,2011,28(10):75-79.WEI Xinxin,DING Wenqi.Probabilistic limit state design method of highway tunnel[J].Journal of Highway and Transportation Research and Development,2011,28(10):75-79.
[13]赵国藩,金伟良,贡金鑫.结构可靠度理论[M].北京:中国建筑出版社,2000:17-19.
[14]中铁二院工程集团有限责任公司,西南交通大学,石家庄铁道大学,等.铁路隧道结构极限状态设计方法研究[R].成都:中铁二院工程集团有限责任公司,2014.
[15]中国建筑科学研究院.GB 50153—1992工程结构可靠度设计统一标准[S].北京:中国建筑工业出版社,2008.
[16]铁道部科学研究院.GB 50216—1994铁路工程结构可靠度设计统一标准[S].北京:中国计划出版社,1994.
[2]张清,王东元,李建军.铁路隧道衬砌结构可靠度分析[J].岩石力学与工程学报,1994,13(3):209-218.ZHANG Qing,WANG Dongyuan,LI Jianjun.Reliability analysis of lining structures in Chinese railroad tunnels[J].Chinese Journal of Rock Mechanics and Engineering,1994,13(3):209-218.
[3]景诗庭.地下结构可靠度分析研究之进展[J].石家庄铁道学院学报,1995,8(2):13-18.JING Shiting.The advance of reliability research of underground structure[J].Journal of Shijiazhuang Railway Institute,1995,8(2):13-18.
[4]谭忠盛,高波,关宝树.偏压隧道衬砌结构可靠度分析[J].西南交通大学学报,1996,31(6):21-27.TAN Zhongsheng,GAO Bo,GUAN Baoshu.The structural reliability analysis of bias tunnel lining[J].Journal of Southwest Jiaotong University,1996,31(6):21-27.
[5]谭忠盛.隧道支护结构体系可靠度的理论研究及其工程应用[D].成都:西南交通大学土木工程学院,1998.
[6]周佳媚,严松宏,王英学.单线铁路隧道洞门结构分项系数的研究[J].西南交通大学学报,2001,36(5):505-508.ZHOU Jiamei,YAN Songhong,WANG Yingxue.Analysis of partial coefficients of single-track railway tunnel portal structures[J].Journal of Southwest Jiaotong University,2001,36(5):505-508.
[7]谭忠盛.隧道洞门土压力的离心模型试验及计算模式不定性[J].西部探矿工程,2001(4):76,77.
[8]谭忠盛.隧道洞门抗滑模型试验及可靠度分析[J].兰州铁道学院学报:自然科学版,2001,20(3):4-7.TAN Zhongsheng.A model experiment on the anti-sliding property of tunnel door and research on its reliability[J].Journal of Lanzhou Railway University:Natural Sciences,2001,20(3):4-7.
[9]李伦贵,高波.翼墙式隧道洞门可靠性分析[J].西南交通大学学报,2002,37(5):496-499.LI Lungui,GAO Bo.Reliability analysis of wing wall tunnel portal[J].Journal of Southwest Jiaotong University,2002,37(5):496-499.
[10]铁道第二勘察设计院.TB 10003—2005铁路隧道设计规范[S].北京:中国铁道出版社,2005.
[11]宋玉香,景诗庭,朱永全.隧道结构系统可靠度研究[J].岩土力学,2008,29(3):780-784.SONG Yuxiang,JING Shiting,ZHU Yongquan.Research on reliability of tunnel structural system[J].Rock and Soil Mechanics,2008,29(3):780-784.
[12]魏新欣,丁文其.公路隧道概率极限状态设计方法[J].公路交通科技,2011,28(10):75-79.WEI Xinxin,DING Wenqi.Probabilistic limit state design method of highway tunnel[J].Journal of Highway and Transportation Research and Development,2011,28(10):75-79.
[13]赵国藩,金伟良,贡金鑫.结构可靠度理论[M].北京:中国建筑出版社,2000:17-19.
[14]中铁二院工程集团有限责任公司,西南交通大学,石家庄铁道大学,等.铁路隧道结构极限状态设计方法研究[R].成都:中铁二院工程集团有限责任公司,2014.
[15]中国建筑科学研究院.GB 50153—1992工程结构可靠度设计统一标准[S].北京:中国建筑工业出版社,2008.
[16]铁道部科学研究院.GB 50216—1994铁路工程结构可靠度设计统一标准[S].北京:中国计划出版社,1994.