岩溶隧道涌水注浆加固关键技术研究

摘要

A large tunnel pass through water-rich karst areas.Causes of sudden water gushing accident were analyzed combined with topography,lithology,geological structure,hydrogeological and engineering geological conditions of the tunnel,key technology of grouting reinforcement with poreforming for once a time and segmented grouting were used innovatively.Monitoring results showed that the technology of grouting reinforcement had good effect,as well as overcome the shortcomings of repeatedly sweeping holes,improved the efficiency of construction greatly,saved construction time.%某大型隧道穿越富水岩溶地层,结合该隧道的地形地貌、地层岩性、地质构造、水文地质与工程地质条件,分析突发涌水事故原因,采用一次成孔自上而下分段注浆的关键加固技术.监测结果表明,该注浆加固技术效果好,克服了反复扫孔的缺陷,大幅提高了施工效率,节约了施工时间.