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太佳宝塔山隧道出口右洞K110+935处掌子面出现断层带,围岩主要为泥加碎石夹层,风化严重,无法封闭,大量塌落,并且右侧水量较大,后来塌方,塌腔高度8m,纵向长度12m,出水流量约0.01m2/s～0.02m2/s。地表处理采用Φ108大管棚架设通过塌空区、φ50小导管注浆加固、钢拱架加密配合φ50小导管环向加固、塌腔处预留管道,后期泵送粉煤灰等轻质填充料等施工技术,成功通过了塌方段。文章就相关技术作了介绍。
Tajiabaotashan tunnel exit right hole K110 +935 at the right side of the fault surface of the fracture zone, the main rock is gravel plus gravel, weathering serious, can not be closed, a large number of slump, and the right side of the larger amount of water, then collapse, collapse Cavity height 8m, longitudinal length 12m, effluent flow of about 0.01m2 / s ~ 0.02m2 / s. The surface treatment adopts Φ108 pipe shed to set up the tunnel through the collapse zone and the φ50 small pipe is grouted and reinforced. The steel arch frame is strengthened with the φ50 small pipe to reinforce the ring, the pipeline is reserved in the cave cavity, and the lightweight filler And other construction techniques, successfully passed the landslide section. The article introduced the related technology.