工程科学学报2017，Vol.39Issue(11)：1626-1633,8.DOI:10.13374/j.issn2095--9389.2017.11.003
石膏围岩隧道衬砌结构破坏模式及时变可靠度模型
Failure mode and time-dependent reliability model of tunnel lining structure built in gypsum rock
摘要
Abstract
Gypsum rock is strongly corrosive and expansive,which can cause significant deterioration in the lining structure and the strength over the life sysle of a geologic tunnel. It would seriously affect the reliability of the tunnel lining structure reliability and negatively impact complex structural rules. In this reported study,the expansion failure and corrosion failure modes of the lining struc-ture were established according to the influence of the expansive character and the corrosivity of the gypsum wall rock on the tunnel lin-ing structure. Based on the combined effects of swelling and the corrosivity of gypsum on the tunnel lining structure,a comprehensive failure mode for the gypsum rock tunnel lining structure was established. Based on the structural functions,a derived reliability index formula for the tunnel lining structure based on the swelling and erosion of surrounding rock was established. A reliability analysis model of the gypsum in three failure modes was instituted. Based on the failure mode of the surrounding gypsum rock, the time-de-pendent reliability model of Lirang tunnel was analyzed,and a rule for the reliability index in a life span over a period of 100 years was obtained. According to the calculated results,the corrosion resistance,anti-swelling and supporting structure design parameters of the tunnel lining structure of gypsum rock could be optimized, and rational maintenance and repair of the gypsum rock tunnel life-cycle was provided. The research results can be applied to reliability research of tunnel lining structures.关键词
石膏岩/衬砌结构/破坏模式/塑性区/时变可靠度Key words
gypsum rock/lining structure/failure mode/plastic zone/time-dependent reliability分类
建筑与水利引用本文复制引用
陈钒,吴顺川,任松,李振元..石膏围岩隧道衬砌结构破坏模式及时变可靠度模型[J].工程科学学报,2017,39(11):1626-1633,8.基金项目
国家自然科学基金资助项目(51774057) （51774057）
