Abstract Taking the entrance construction of Hujiawan tunnel and Dongzhagou tunnel on Lanzhou-Chongqing railway for examples, deformation characteristics of surrounding rocks during excavation of tunnels in soft rocks such as mud stone and shale are described. Causes of deformations were analyzed in respect of geology and construction. Corresponding countermeasures were established according to construction opportunity and method.
Keywords ：
Soft rocks Tunnel deformation Cause analysis Countermeasures
Abstract ：
Taking the entrance construction of Hujiawan tunnel and Dongzhagou tunnel on Lanzhou-Chongqing railway for examples, deformation characteristics of surrounding rocks during excavation of tunnels in soft rocks such as mud stone and shale are described. Causes of deformations were analyzed in respect of geology and construction. Corresponding countermeasures were established according to construction opportunity and method.
Keywords ：
Soft rocks Tunnel deformation Cause analysis Countermeasures
published: 2011-03-04
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2011, Vol. 48 