路桥(中-英)

该方案参照中国《内河通航标准》,按Ⅱ级航道,通航净宽150m(双向),选用预应力混凝土独塔斜拉桥,主孔布置为200+145+55m,见方案二总体布置图及总体效果图。主桥下部构造采用桩基础,桥塔采用花瓶型,空心断面,塔柱断面外侧为弧线形,横桥向宽5.5m,顺桥向宽7.0m;上部构造主梁采用边箱梁,主梁全宽34.6m,边箱底宽13米,截面中心高3.2米;斜拉索间距均为6m,斜拉索在横断面上布置在距边缘0.8m处,横断面布置见示意图。With reference to China’s Inland Navigation Standard and based on Class II navigation channel of which the two-way navigable clearance is 150 m, a prestressed concrete single-pylon cable-stayed bridge is proposed in Plan II. The 200+145+55 m layout of main spans is arranged as indicated in the General Plan Layout and the Design Sketch. For substructure of the main bridge, pile foundations are adopted and a vase-type pylon with hollow cross-section is applied. The outer side of the pylon column cross-section is in an arc line, the width along the horizontal direction is 5.5 m, and 7.0 m along the bridge direction. For superstructure, a side box girder is adopted with an overall width of 34.6 m; the width of the bottom of the side box is 13 m, and the cross-section center height is 3.2 m. The stayed cables, each of which is 6 m spaced, are placed 0.8 m to the edge on the cross-section. See the schematic diagram for cross-section layout.