麦积山特长公路隧道施工期衬砌结构可靠度分析  

Reliability of the Lining Structure of the Majishan Extra-Long Highway Tunnel

作　　者：杨建国[1,2] 刘殿兵 王琦 曹晖 罗代松[1] 

机构地区：[1]交通运输部科学研究院,北京100029 [2]中国科学院寒区旱区环境与工程研究所冻土国家重点实验室,兰州730000 [3]内蒙古锡林郭勒盟乾图交通设计有限责任公司,锡林浩特026000 [4]甘肃长达路业有限责任公司,兰州730000 [5]甘肃路桥第二公路工程有限责任公司,兰州730050

出　　处：《现代隧道技术》2012年第6期62-69,共8页Modern Tunnelling Technology

基　　金：西部交通建设科技项目(200131800071);甘肃省交通厅科技项目(2005004)

摘　　要：为了解麦积山特长公路隧道施工期结构可靠性,确定影响结构可靠性的主要因素,基于连续介质模型,运用PFEM、Latin hypercube MC、可靠度灵敏度等方法和手段,研究了衬砌结构可靠度。计算结果显示,麦积山隧道右线衬砌结构可靠指标为3.8,结构失效概率小;现场测试也表明,支护及衬砌结构安全。文章论述的将一般工程结构可靠度理论与衬砌结构特点相结合、定量计算与定性分析相结合、现场测试与理论计算相结合,可全面反映衬砌结构可靠性水平;可靠度、灵敏度分析有助于确定影响可靠度的主要随机变量,从而针对可控因素,可合理确定提高结构可靠度的措施。In order to determine the structural reliability of the Maijishan to discover the main factors affecting its structural reliability, PFEM, Latin other methods were used to analyze the reliability of the lining based extra-long mountain highway tunnel and hypercube MC, sensitivity analysis, and continuous medium model. Calculations showed that the reliability index of the lining structure for the right line of the Majishan tunnel is 3.8 and the structure has a low probability of failure. A site test also showed that supporting with the lining structure is safe. It is concluded that the reliability of a lining structure can be fully indicated by combining the reliability theory of structural engi-neering with features of the lining structure, quantitative calculation, qualitative analysis, site tests and theoretical cal- culations. A sensitivity analysis of reliability can help determine the main random variable affecting the reliability as well as reasonable measures to improve structure reliability accordingly.

关 键 词：公路隧道 衬砌结构 结构可靠度 灵敏度 现场测试 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]