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312国道镇江段起于镇江丹阳与常州交界处,沿原312国道,经横塘立交后改线,在河阳镇境内与原312国道相接,下穿沪宁高速公路,经镇南立交,止于镇江与南京交界处。扩建工程全长95公里,总投资14.5亿元,全线按路基宽25 5米(城区段路基宽32米)、双向四车道一级公路标准建设,共拆迁房屋14万平方米,开挖土石方326万方,填筑土石方470万方,修建桥梁48座(其中大桥4座、中桥13座)。
312 State Road Zhenjiang section from the junction of Zhenjiang Danyang and Changzhou, along the original 312 State Road, after the interchange by Wang Tong, in the territory of the original State Road 312 and connected to Shanghai-Nanjing Expressway, the town via the interchange, the only At the junction of Zhenjiang and Nanjing. The total length of the expansion project is 95 km with a total investment of 1.45 billion yuan. The whole project will be built on the basis of 25 5 meters of subgrade (32 meters wide in urban section of subgrade) and two-way four-lane highway. A total of 140,000 square meters of houses will be demolished, Wanfang, 470,000 cubic meters of earth and stone fill, building 48 bridges (of which 4 Bridge, Bridge 13).