基于可靠度理论的水下大直径盾构隧道耐久性设计  

THE DURABILITY DESIGN OF LARGE SHIELD TUNNELS BASED ON THE RELIABILITY THEORY

作　　者：武建力[1] 高抗 WU Jianli;GAO Kang(CCCC Second Highway Consultant Co.Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《低温建筑技术》2020年第10期125-128,141,共5页Low Temperature Architecture Technology

摘　　要：文中针对某水下公路大直径盾构隧道,采用支持向量机(SVR)与响应面相结合的方法,计算了盾构管片耐久性。基于可靠度理论,利用matlab研制了专用的耐久性计算方法。并提出了基于可靠度理论近似概率的大直径盾构隧道管片结构耐久性设计的方法,计算了结构耐久性设计系数。根据耐久性设计得到大直径盾构隧道管片结构100年服务寿命时的极限状态方程。研究结果可为今后类似水下盾构隧道耐久性设计提供理论依据。In this paper,for a large-diameter shield tunnel of underwater highway,the durability of the lining structure is calculated by using support vector machine(SVR)and response surface model.Based on the reliability theory,this research develops a special calculation method on durability by using MATLAB.Moreover,a method of durability design method of large-diameter shield tunnel segment structure based on the approximate probability of reliability theory is proposed,and the structure durability coefficient is calculated.According to the durability design,the limit state equations of the structure at 100 years service life is obtained.The results provide a theoretical basis for the durability design of underwater shield tunnel.

关 键 词：大直径盾构 耐久性 可靠度 SVR 

分 类 号：TU311.4[建筑科学—结构工程]