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1972年前,广州铁路局基建处第二工程段在湘黔线娄底编组场修建工程中,第一次采用沉井抬梁法修建立交桥,为不中断行车,采用了一种新的施工方法[在《铁路标准设计通讯》(铁道部第三设计院)1975年第2期作过介绍]。此后几年,他们又修建了十多座立交桥涵,经过反复实践,不断总结经验,在原有的方法上又有新的发展,使原来的单跨沉井抬梁
Before 1972, the second construction section of the Infrastructure Department of the Guangzhou Railway Bureau adopted a new construction method for uninterrupted driving during the construction of the Loudi Marshalling Yard of Xiang-Qian line. For the first time, Railway Standard Design Communication "(Ministry of Railways Third Design Institute) No. 2, 1975 made an introduction]. In the next few years, they built more than a dozen overpasses and culverts. After repeated practice and continuous summaries of their experiences, they have made new progress in their original methods to lift the original single-span caisson