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介绍了紫坪铺隧道隧底隆起病害及其发展过程,结合隧道所处的地质环境及病害历史,分析了隧底隆起病害产生的主要原因。根据病害程度不同按严重隆起、较严重隆起、轻微隆起三种情况分别采取了处治措施,处治技术的核心是加固隧底围岩并设置钢筋混凝土仰拱。通车一年多来,未再发现隧底隆起现象,实践表明处治效果良好、所采取的处治措施可行。据此,提出了软岩公路隧道设计的注意事项及隧底隆起病害处治的建议措施。
The disease and development process of tunnel bottom elevation in Zipingpu Tunnel are introduced. According to the geological environment and history of the tunnel, the main causes of the tunneling disease are analyzed. According to the degree of disease according to the serious uplift, more serious uplift, slight uplift were taken three cases of treatment measures, the core of treatment technology is to strengthen the tunnel surrounding rock and set up the inverted arch of reinforced concrete. After more than a year of operation, no tunnel uplift has been found again. Practice shows that the treatment effect is good and the treatment measures taken are feasible. Based on this, the precautions of the soft rock highway tunnel design and the recommended measures to deal with the disease of tunnel bottom bulge are put forward.