浅埋隧道地表玻璃纤维锚杆加固施工技术研究OA

Taking Erlang Tunnel of Shanghai-Nanjing High-speed Railway as the background,based on the analysis of the reinforcement prin-ciple and reinforcement effect of the surface glass fiber anchor rod in the shallow buried tunnel,the construction method,reinforcement effect and economic benefits of the shallow buried tunnel(especially the entrance section)are discussed.Analyzing the influence of the length,spacing and lap length of the glass fiber bolt on the stability of the core soil in the advance of the shaft surface,in order to effectively control the displacement in the hole and the surface deformation,use hydraulic crushing hammer to reinforce the shaft surface,effectively avoid the col-lapse of the instability after excavation,greatly improve the construction safety,large machinery can be used for the excavation of the whole section,effectively improve the construction efficiency.