隧道仰拱常见病害原因分析及处治措施探讨

Study on the Mechanism and the Treatment Measures of Tunnel Invert Common Diseases

分析隧道仰拱常见病害原因,认为基底软化、地下水作用、仰拱结构缺陷是导致仰拱常见病害的根源,总结了目前仰拱常见病害的处治措施,即拱脚锁脚、基底加固、仰拱换拆和地下水引排等,分别通过减小侧向水平力对仰拱基底的挤压作用、加固基底、重新施做仰拱结构、减少地下水作用等4方面对仰拱常见病害进行治理。

The mechanism of tunnel invert common diseases is analyzed, and it is concluded that the soft foundation, groundwater and structural defects are the root causes of the tunnel invertcommon diseases, and the soft foundation is caused by both rock factors and human factors. Based on the anal ysis of disease causes, the treatment measures for the common diseases of the tunnel invert are summed up, namely using arched foot bolt for the horizontal pressure, strengthening foundation for the soft foundation, demolishing invert for the perfect structure and dredging and drainage for the groundwater.