在役隧道衬砌结构的劣化机理研究

衬砌裂损作为在役隧道最常见的病害之一,严重影响了隧道服役期间的结构整体性,其对隧道二衬结构的强度、刚度以及稳定性均会造成一定程度的破坏。在役隧道衬砌结构承载性能劣化-耗散机理的进一步研究使得对在役隧道衬砌结构的劣化机理研究成为必要。文章总结了近年来隧道衬砌裂纹的几种基本类型,分析了隧道二衬结构开裂的原因,主要进行了基于断裂力学理论分析在役隧道衬砌结构的劣化机理。

As one of the most common diseases of existing tunnels,lining cracks seriously affect the integrity of the tunnel structure during service,which will cause some damage to the strength,stiffness and stability of the second lining structure of the tunnel.It is necessary to study the deterioration mechanism of in-service tunnel lining structure due to the further study of the deterioration and dissipation mechanism of in-service tunnel lining structure.This paper summarizes several basic types of tunnel lining cracks in recent years,analyzes the causes of tunnel second lining cracks,and mainly analyzes the deterioration mechanism of existing tunnel lining structures based on the theory of fracture mechanics.