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由中国建筑技术开发公司、青岛瑞达模板系列公司和中国铁道建筑总公司北京工程公司共同承担建设部下达的“钢框胶合板组合式半隧道模板设计和施工技术的科研课题”,于1990年7月17日在北京通过技术鉴定。
The China Construction Technology Development Corporation, Qingdao Ruida Formwork Series Co., Ltd. and China Railway Construction Corporation Beijing Engineering Co., Ltd. jointly undertook the “Scientific Research Project of Formwork Design and Construction Technology for Combined Steel-Plywood Semi-tunnels” issued by the Ministry of Construction in 1990. It passed technical appraisal in Beijing on the 17th.