work progress
Xisha Yellow River Bridge was built in 197 1 year, located in Zhong Jiahe (the northern end of Gulang Road), Xigu District, Lanzhou City, Gansu Province, and was rebuilt and strengthened in 2005. Now the bridge is 320 meters long, only 1 1 meter wide, with two lanes.
bridgework
The bridge was invested and constructed by Lanzhou Municipal Engineering Company, designed by Lanzhou Survey and Design Department and constructed by Lanzhou Municipal Engineering Company. The design load levels are-18 and Tuo -80, the basic earthquake intensity is VII, the navigation standard is level 5, the design flood frequency is1100, the design flood flow is 6500m3 /s, and the design flood level is 1539.5m .. Among them, the roadway is 7m, the sidewalk 1.25 x 2m, and the span is 5x22.16m+3x32.6m+5x22.16m. The superstructure is a fish-bellied steel truss beam, with a main span of 3 spans and a span of 32.6m, and the remaining 10 span is an assembled ordinary reinforced concrete t beam with a span of 22.16 m. ..
This bridge is 320 meters long. 197 1 started construction in June, and 19 74 was completed and opened to traffic in June. The bridge was invested and constructed by Lanzhou Municipal Engineering Company, designed by Lanzhou Survey and Design Department and constructed by Lanzhou Municipal Engineering Company. The design load levels are steam-18 and Tuo -80, the basic earthquake intensity is VII, the navigation standard is level 5, the design flood frequency is1100, the design flood flow is 6500IIi3/s, and the design flood level is1539.5. Among them, the carriageway is 7m, the superstructure of the sidewalk is a three-span fish-bellied steel truss beam with a span of 32.6m, and the rest 1 0 span is an assembled ordinary reinforced concrete T beam with a span of 22.16m ... The substructure is an open-cut foundation and an open caisson foundation. After more than 30 years of operation and use, the deck pavement of this bridge has been damaged, partially completely damaged, and the deck feels obvious when vehicles pass by. Therefore, after investigation, demonstration and design, Lanzhou municipal government decided to transform and strengthen it. The bridge reconstruction and reinforcement project mainly includes the replacement of the bridge superstructure, the maintenance of the substructure and the maintenance of ancillary facilities, with a total investment of more than 20 million yuan. According to the planning of Lanzhou, five modern river-crossing bridges will be built in Lanzhou in the next 10 ~ 20 years, of which the Taoyuan Yellow River Bridge in Gulang Road is adjacent to the Xisha Yellow River Bridge and will replace the Xisha Yellow River Bridge. The river section where the bridge is located belongs to a canyon river. The river valley is spacious, the river course is slightly curved, the water flow is basically stable and the riverbed is relatively stable. The terrain on both banks is relatively high, the left bank is a valley terrace, and the right bank is connected with Xigu City of Lanzhou City. There are dikes and roads along the river, and the reach has certain flood control pressure.
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