既有隧道仰拱病害整治措施研究

Research on Treatment Measures for Invert Diseases of the Existing Tunnels

以某客运专线上的三座既有隧道五处里程段仰拱病害调查情况和现场检测结果为依托,对其病害产生的原因进行了分析,并运用荷载-结构法对隧道结构安全性进行了研究。根据隧道仰拱病害产生的原因和结构安全性分析结果,提出了一种在隧道仰拱填充厚度不足或缺失情况下采用锚杆加固与注浆加固相结合的定量设计方法,确保了隧道营运的安全。

Based on the investigation and field inspection results of the invert diseases of three existing tunnels in five mileage sections on a passenger dedicated line,the causes of the diseases are analyzed,and the safety of the tunnel structure is studied by using the load-structure method.According to the causes of tunnel invert diseases and the results of structural safety analysis,a kind of quantitative design method combining bolt reinforcement and grouting reinforcement is put forward when the filling thickness of tunnel invert is insufficient or missing,so as to ensure the safety of tunnel operation.