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328国道海安县段改扩建工程K24+690～K25+330段长640m范围内与既有和新建的7条铁路交叉,设计方案复杂,施工难度大,为全线的控制性工程。为使工程方案既经济合理又能确保安全,结合在建宁启线复线电气化改造正元港务铁路专用线改建方案,研究了328国道上跨铁路立交、全部下穿铁路立交及下穿宁启线与铁路专用线改建方案平交、原位立交和移位立交等多个设计方案。从工程投资、施工难度及运营安全等多方面综合比选,推荐采用328国道与铁路专用线改建线位移位下穿立交方案。该方案得到了各方的认可。
328 State Road Haian section of the expansion project K24 +690 ~ K25 +330 section 640m within the existing and newly built 7 railway cross, the design complex, construction is difficult, for the entire control project. In order to make the project plan not only economical and reasonable, but also to ensure safety, combined with the reconstruction of the special railway line of Zhengyuan Port Line in electrification of Jian-ning line and double-track line, With the special railway line reconstruction plan, in situ overpass and shift overpass and many other design options. From the project investment, construction difficulty and operational safety and other aspects comprehensive comparison and selection, it is recommended to use 328 State Road and special railway lines to rebuild the line bit through the underpass program. The program has been recognized by all parties.