Finally , systemic technology of design and construction of sfrc in tunnel engineering , by the example of gao niangou tunnel , which located at xi " an - an kang railway , and where sfrc was used as permanent lining , was discussed 最后通过西康线高碥沟隧道采用钢纤维混凝土作为隧道永久衬砌的成功事例，系统介绍了在隧道工程中，喷射钢纤维混凝土的设计和施工技术。
