在局施工处、第一、二、三工程处广大职工的大力支持与参与下,我局科研所于1981年12月份在京广线衡韶段雷公尖隧道试挂了约30平方米的软聚氯乙烯防水塑料板。用软聚氯乙烯板做为铁路隧道复合式衬砌中间防水层,在我国铁路修建史上还是第一次。这次试挂是悬挂防水塑料板工艺研究的首次现场试验。 At the Construction Bureau of the bureau, with the strong support and participation of the vast majority of workers of the first, second and third Agency, the Institute of Science and Technology held a trial of about 30 square meters of soft PVC waterproof plastic board. With PVC plate as the railway tunnel composite liner middle waterproof layer, in the history of China’s railway construction is the first time. This trial hanging is the first field test of the craft of hanging waterproof plastic panels.