软土隧道衬砌结构的可靠性设计方法

Reliable Design Method of Tunnel Lings in Soft Soil

以可靠度理论为基础,对软土隧道预制混凝土管片衬砌结构的可靠性设计方法进行了初步探索,包括:软土隧道预制混凝土管片衬砌结构的失效模式与极限状态方程,土性参数、混凝土的力学性质、荷载效应等随机变量的统计分析,可靠度指标与分项系数的计算,以分项系数表示的设计表达式的提出等,以期对软土隧道的设计进入概率极限状态设计阶段起到抛砖引玉的作用。

Due to the merits of the probabilistic limit state design method that is applied in many fields,this paper discusses a design method of tunnel lings in soft soil based on credibility theory,including the failure modes,equations of lings,statistical analysis of soil parameters,mechanical properties and load effects,calculation of reliability index and partial coefficients,as well as the presentation of design expressed by partial coefficients,hopes to achieve the probabilistic limit state design in soft soil projects.