钢纤维喷混凝土在引水隧洞永久支护中的应用

在隧洞工程中钢纤维喷混凝土在世界许多国家得到了广泛应用,如瑞典、挪威、比利时、德国、加拿大、南非、法国、美国、西班牙、芬兰和日本等国均制定了相应的设计和施工规范,大量采用钢纤维混凝土作为隧道的初期支护和永久支护.简要介绍了钢纤维喷混凝土在支护前的配合比试验以及在支护过程中的质量控制要点,尤其是对施工工艺的控制,并对钢纤维喷射混凝土在地下洞室永久支护中的应用进行了技术经济比较,通过该工程实践,将对其推广应用有进一步的促进.

Application of steel fibre shotcrete in permanent support of water diversion tunnel

Steel fibre shotcrete is widely used in tunnel works in many countries.For example,in Switzerland,Norway,Belgium,Germany,Canada,South Africa,France,U.S.A,Finland,Japan etc.,the design and construction standards have been drawn up,and steel fibre concrete is used for initial-stage support and permanent support in large amount.This paper briefly introduces mix ratio test of steel fibre concrete before support process and main points of quality control in support process,especially construction technology control,and carries out technologic and economic analysis for permanent support in underground chamber by steel fibre shotcrete.The practice in this project will promote further application of steel fibre concrete.