Wuhan Lanzhou the Yellow River Xigu bridge closure eight earthquake resistance headache怎么读�

Wuhan Lanzhou the Yellow River Xigu bridge closure anti earthquake of eight Lanzhou Xigu the Yellow River bridge closure correspondent Sui Yehui taken the day before yesterday, closure by the headquarters in the Han Dynasty in the two bureau of aviation construction of the Xigu District of Lanzhou the Yellow River bridge. This is the largest span in northwest the Yellow River, the highest tower of the cable-stayed bridge, more people are concerned that this bridge is located in the northwest seismic belt, can withstand eight earthquake. Lanzhou is the ancient Silk Road City, west the Yellow River bridge is Lanzhou south highway around key control projects, across the Yellow River, Lan Xin railway and national highway 109, crossing the two national water conservation area. Bridge a total length of 1003 meters, of which the main bridge is 714 meters long, the design for the composite girder cable-stayed bridge with three span steel Twin Towers, main span 360 meters, the project contract amount of 490 million yuan. The bridge where regional hydrogeology is bad, the flow velocity difference is large, the Yellow River, river pebbles accumulation, and is the main earthquake belt in China — one of the Lanzhou Tianshui earthquake zone, which brings great difficulties to the design and construction of the bridge. The post two air Bureau of Lanzhou Xigu the Yellow River Bridge Project Manager Wang Jinjun said: "this bridge from design to construction, many aspects of the unique innovation. Steel Zhanqiao bridge in the country for the first time the bench pile and steel anchor pile combining form, a good solution to the problem of flow velocity and hydrogeological main river cobble layer; at the same time, the bridge is designed as a strong earthquake, eight earthquake resistant." Statistics show that Lanzhou Tianshui seismic belt is one of the largest earthquake areas in China, and is also the region with the strongest earthquake activity. The post two air bureau project chief engineer Hu Yongbo introduction, the bridge is located in high seismic zone, therefore, the bridge for earthquake resistance and isolation requirements higher than the general bridge. Through the calculation and analysis of earthquake resistance, the viscous dampers are installed in the main girder of the main span of the bridge, and the whole bridge is divided into 4. Compared with the domestic non seismic zone, the damper installed on the bridge is much larger than the bridge. The viscous damper is equivalent to the bridge with "airbag". In the event of an earthquake, the damper can reduce the impact force of 650 tons to reduce the displacement of the key parts of the bridge." Hu Yongbo said that even if the earthquake occurred in Wenchuan earthquake at the same level, the bridge structure will not be damaged. In view of the characteristics of the high bridge deck, located in the the Yellow River River Valley, the two bureau of the construction team also conducted a number of steel beam wind tunnel experiment to ensure the safety of construction and bridge quality. Through independent research and development of bridge crane beam in walking, the air fight bridge, the main bridge closure 2 months ahead of schedule.相关的主题文章: