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一九七九年九月二十一日至二十五日,铁道部在广州召开了桥涵顶进施工技术经验交流会,参加这次会议的有全国各铁路局、工程局和勘测设计院的代表共八十多人。会上,广州铁路局第一工程段介绍了正在施工的广深线石龙箱桥顶拉、气垫、电控和激光导向纠偏施工技术;上海铁路局介绍了津浦线、沪杭线十几座箱涵和箱桥顶进的施工经验,并从理论上探讨了气垫法对桥涵顶进的作用;第四工程局介绍了津浦
From September 21 to August 25, 1979, the Ministry of Railways held a symposium on exchange of technology and experience in the construction of bridges and culverts in Guangzhou. Participants at the meeting included representatives from various railway bureaus, engineering bureaus and surveying and designing institutes across the country A total of more than 80 representatives. At the meeting, the first section of the Guangzhou Railway Bureau introduced the construction of Shilong Box Bridge in the Guangzhou-Shenzhen line roof pull, air cushion, electric control and laser-guided rectification construction technology; Shanghai Railway Bureau introduced Tianjin Pu line, Shanghai-Hangzhou line more than a dozen Box culvert and box bridge jacking construction experience, and theoretically explored the air cushion method on the bridge and culvert jacking; Fourth Engineering Bureau introduced Jinpu