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一、工程概况为弘扬98抗洪精神,九江市委市政府决定修建抗洪广场和抗洪大道。抗洪大道南起已建成的九瑞大道,北至抗洪广场,在 KO+549.5～KO+573.97段与七里湖车站内1、2、Ⅲ、4股道及N18和 N20道岔相交叉。经过方案的技术经济比较,确定该立交采用抗洪大道下穿铁路的形式,桥式为框架桥,主体净跨尺寸为13.0m+13.0m,由两个独立的并列箱体组成,两个框架中心垂直间距29m,以适应道路中间16m宽绿化带的布置要求。框架中心线与沙浔线(Ⅲ道)法线交角为8.9°,斜长25m。桥址处于98年长江决堤口下游200米处,基底为冲积淤泥,厚度达14.8米。平面布置示意见图-1
First, the general situation of the project In order to carry forward the spirit of 98 flood fighting, Jiujiang municipal government decided to build flood plaza and flood control avenue. The flood-resistant road starts from the Jiu-Rui Avenue built to the south and goes to the flood-resistant square in the north. It intersects with the No. 1, No. 2, No. 3 and No. 4 ducts and the N18 and N20 turnouts at Qilihu Station at KO + 549.5 ~ KO + 573.97. After the technical and economic comparison of the scheme, it is determined that the interchange will take the form of flood-resistant avenue under the railway. The bridge type is a bridge with a main span of 13.0m + 13.0m and is composed of two independent parallel boxes with two frame centers Vertical spacing 29m, to meet the middle of the road 16m wide green belt layout requirements. The center line of the frame intersects with the normal line of Shamian line (Ⅲ) at an angle of 8.9 ° and an inclined length of 25m. Bridge site in 98 years downstream of the Yangtze River embankment 200 meters, the basement alluvial silt, thickness of 14.8 meters. Plan layout shown in Figure -1