地铁隧道结构灾变模型及应用研究

Study on Catastrophic Model of Subway Tunnel Structure and its Application

地铁隧道结构灾害影响地铁运营和周边环境安全,其灾变模式和减灾机制的研究对隧道结构安全维护具有重要的价值。依据运营地铁隧道结构灾变过程,基于灾变链式理论,构建了地铁隧道结构灾变链式结构和灾变数学模型,分析了运营地铁隧道结构灾变特征以及不同灾变阶段的断链减灾机制与措施,并应用该模型对某地铁结构灾变特征,从断链减灾模式角度,提出了控制隧道结构灾变演化的具体措施。研究结果表明,隧道结构灾变过程具有链式结构特点,其灾变链式模型可有效地描述结构灾变从孕育阶段到爆发阶段的演化过程;隧道结构灾变过程具有因果关系、渐变与突变共存及蔓延的特征,其减灾措施应从不同灾变阶段的断链机制出发;该模型应用于该地铁隧道结构灾变过程,有效控制了隧道结构灾变的演化。

The structure damage of metro tunnel affects the operation of subway and the surrounding environment. The study of its catastrophic mode and mechanism is of great value to the safety maintenance of tunnel structure. On the basis of metro tunnel structure catastrophe, the subway tunnel structure catastrophe chain structure and catastrophe mathematical model is constructed by the theory of catastrophe chain. Subway tunnel structure characteristics and different stages of disaster chain cutting disaster mitigation mechanism and measures are analyzed. The model is applied to the study of the catastrophic characteristics of a subway tunnel structure, and from the viewpoint of broken chain disaster reduction model, specific measures to control the catastrophic evolution of tunnel structures are put forward. The results show that the catastrophic process of tunnel structure has the characteristics of chain structure. Its catastrophic chain model can effectively describe the evolution process of structure disaster from incubation stage to explosion stage; The catastrophic process of tunnel structure has the characteristics of cause and effect, transition and mutation, coexistence and spread, and its mitigation measures are based on the chain breaking mechanism of different catastrophic stages; The model is applied to the catastrophic process of a metro tunnel structure, which effectively controls the catastrophic evolution of the tunnel structure.