隧道结构地震灾害评价等级及处治技术研究

Research on the Evaluation Grade of Seismic Damage and Disposal Technologies of Tunnel Structure

研究目的:强震造成灾区隧道损毁严重,严重影响抗震救灾及灾后重建的进程。本文以汶川地震隧道震害为研究背景,基于科学重建的需要,并结合抢通、保通和恢复重建三阶段的特点以及隧道结构的恢复目标,对隧道结构震害评价等级及不同阶段处治技术进行研究。研究结论:(1)建立了隧道结构震害评价等级,主要包括隧道震害程度分级原则、钢筋混凝土和素混凝土二次衬砌震害等级评价以及抢通、保通和恢复重建三阶段震害处治重点;(2)明确了抢通、保通和恢复重建三阶段隧道衬砌结构震害处治技术;(3)汶川地震灾区震后运用隧道结构震害评价等级及处治技术进行恢复重建,达到了恢复重建的目标,使震区隧道恢复或超过震前的运营及抗震水平;(4)研究成果可为震区隧道震害修复及抗震结构设计提供参考。

Research purposes： The strong earthquake caused serious damage to the tunnels in disaster area, which seriously affected the progress of the earthquake relief and post - quake reconstruction. This paper, which is based on the seismic damage of the tunnels in Wenchuan earthquake as the research background, with the need of scientific reconstruction, and combined with the characteristics of the three stages, the first aid repair stage, ensure access stage, restoration and reconstruction stage, and the recovery goals of the tunnel structure, has studied the evaluation grade of seismic damage and disposal technologies of different stages of tunnel structure. Research conclusions ： （ 1 ） Established the evaluation grade of seismic damage of tunnel structure, mainly including the graded principles of the seismic damage degree of the tunnels, the evaluation grade of seismic damage of reinforced concrete and plain concrete secondary lining, and the treatment key point of seismic damage of the three stages, the first aid repair stage, ensure access stage, restoration and reconstruction stage. （2） Clarified the disposal technologies of seismic damage of tunnel lining structure of three stages, the first aid repair stage, ensure access stage, restoration and reconstruction stage. （3） The disaster area in Wenchuan earthquake used the evaluation grade of seismic damage and disposal technologies of tunnel structure for restoration and reconstruction after the earthquake, reached the goal of restoration and reconstruction, which recovered or over the level of operation and earthquake - resistant of the tunnels in the earthquake zone before earthquakes. （4） The research results can provide a reference for the repair of seismic damage of the tunnels in the earthquake zone and aseismic design of tunnel structure.