Lanzhou Shen' anqiao introduced?

Lanzhou Shen 'an Bridge, starting from the deep ditch bridge in Xigu District in the south, crosses the Yellow River and connects the Anning District in the north bank, with a total length of1.320m.. Its north and south ends are connected with planned roads T088# and T520#, and meet with Yellow River South and Binhe North Road. The bridge deck is arranged in two directions and six lanes, with pedestrians and non-motor vehicles on both sides. The total width of the bridge deck functional area is 30 meters, and the main bridge and approach road are the first-class urban trunk roads. It is the Lanzhou 13 river-crossing bridge and the first full-interchange landscape bridge.

brief introduction

Because the bridge type is novel and the structure is complex. As early as August, 2007, Lanzhou City invited tenders for the design of the "Butterfly" arch bridge, which was finally designed by Shanghai Municipal Design Institute, passed the expert review, and Shen An's "Butterfly Dance" was reported in newspapers many times. 20 10 in may, the signing ceremony of the "BT" investment agreement for the Shen An yellow river bridge project in Lanzhou was successfully held. The bridge is built in "BT" mode, with a total investment of 690 million yuan, and it is planned to be completed within two years.

Shen An Yellow River Bridge is planned and designed as a "butterfly" arch bridge, which is an original bridge type in China at present. In this scheme, the arch column is like a wing flying high, and the design life of the bridge is at least 50 years. According to the relevant planning of Lanzhou Yellow River Bridge, five urban structure overpasses are planned along the Yellow River, namely Xisha Bridge, Shen An Yellow River Bridge, Qilihe Bridge, Xiaoxihu Bridge and Chengguan Yellow River Bridge Expressway, all of which are overpasses.

General situation of architecture

Shen An Yellow River Bridge in Lanzhou City is located between Qilihe District and Anning District in Lanzhou City. It starts from the deep ditch bridge in Qilihe District in the south and crosses the Yellow River and Anning District in the north. It is about 15km away from the upstream Xisha Yellow River Bridge and 5km away from the downstream Yintan Yellow River Bridge. The planned roads T088# and T520# at both ends of the bridge run northeast-southwest and are the main roads of the city. They are planned to be located in the west of the city and cross the Yellow River. Main bridge 1.32km, in which the main bridge is 272m long. The main line intersects with Nanbinhe Road on the south bank of the Yellow River and Beibinhe Road on the north bank of the Yellow River. The interchange form is "two and a half directions+two alfalfa leaves", and each direction has a 16 ramp. The main bridge is a butterfly arch bridge with a main span of 65438+. The main beam structure is steel-concrete composite beam, and the stiffening beam of the main beam adopts box section. Moreover, the cable plane layout with a cable distance of 8m on the beam is adopted, and the whole bridge has *** 17 pairs of suspenders, which are tensioned on the beam. The main arch rib adopts steel box section, the auxiliary arch rib adopts circular tube section, and the main arch and the auxiliary arch are connected by connecting rods.

Shen An Yellow River Bridge will further meet the needs of Lanzhou's economic development, further improve the urban road network, and promote the traffic development in Lanzhou, especially in Anning area. The construction of this project can improve the regional traffic environment and become the support for Lanzhou city to expand northward. After the completion of the bridge, it will greatly improve the current situation of insufficient peaceful traffic capacity, and then play a positive role in improving the road network on the north bank of the Yellow River. In terms of culture and commerce, Shen 'an Bridge will organically connect the Anning transportation network under construction with Xigu Industrial Zone on the south bank. The bridge is convenient in traffic, with separate pedestrians and vehicles, taking into account the traffic capacity of vehicles, the comfort of pedestrians and the participation of landscape, which will comprehensively improve the north-south traffic, enhance the cultural and commercial atmosphere on both sides of the strait, and make the two sides directly integrate into a public business and entertainment core area. The regional value will be greatly enhanced.

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