Guanggan Expressway Tunnel Collapse And Disaster Management Measures Research

Landslide is a common engineering disaster in the process of tunnel construction.It not only results in the construction schedule delays, and even leads to the loss of lives and properties.If handled improperly, the landslide will become a critical security vulnerabilities in the tunnel’s operation. Therefore, a systematic study on the reasons and the corresponding prevention, early warning, control measures for the tunnel landslide is very necessary and of great significance to the future tunnel construction projects.This article focuses on the study of landslide disasters occurred in the construction of Guangyuan Gansu highway Du Jiashan Tunnel,of which, it not only analyzed the occurrence mechanism of collapse from the aspects of engineering geology, hydrological environment, design, construction,but also gave the analysis and evaluation to the corresponding treatment measures.The thesis research work and the results are as follows:1. mary of the collapse status and disaster management program of Shen jiashan and Yang jiashan tunnel.2. Centered on Du jiashan tunnel test section,the article detailedly analyzed the support parameters for the complex geological environment of sericite phyllite. 3. Adopted the finite difference analysis method FLAC to perform a numerical simulation on K15+544collapse section, the article analyzed the reason and disaster management measures under this environment and evaluated the disaster treatment methods.4. Against the complex geological environment,after improving the engineering method into DaoKen simulation,this article analyzed the deformation of wall rock and it’s advantages compared with the arc drift method, single-side heading method and the superiority of the two-step method.