新建隧道病害处治加固技术

Reinforcement technology of disease treatment in newly-built tunnel

以新建孙家崖隧道为例,分析了隧道初期支护变形、二次衬砌开裂等病害产生的原因及现状,提出了隧道病害整治的原则,并根据裂缝宽度以及素混凝土衬砌、钢筋混凝土衬砌的不同形式,采取了相应的加固方案,保证了该隧道的施工质量。

Taking the newly-built Sunjiaya Tunnel as the example, the paper analyzes the reasons for the diseases including the support deformationof primary period of tunnels, and cracks in the secondary lining, points out the treatment principle for the tunnel diseases, and adopts respectiveconsolidation scheme according to the crack width, concrete lining, and various forms of reinforced concrete lining, so as to ensure the tunnelJs construction quality.