Introduction of Lanzhou South Ring Expressway?

Lanzhou South Ring Expressway is a part of Lianhuo National Road, which is located in Lanzhou. Lanzhou South Ring Expressway is not only the transit section of Lianyungang-Horgos Expressway in Lanzhou City, but also the urban loop line of Lanzhou City, the end point of Qingdao-Lanzhou National Expressway. The following is a brief introduction of Lanzhou South Ring Expressway by Zhong Da Consulting:

Lanzhou South Ring Expressway —— Brief Introduction

Lanzhou South Ring Expressway starts from Dingyuan Town, Yuzhong County in the east, passes through heping town, Xiguoyuan and Liangjiawan, and ends at Huangyangtou, connecting with Lanhai Expressway, with a construction mileage of 58.249 kilometers. It is a two-way four-lane expressway with a design speed of 80 km/h and the overall route is east-west. Lanzhou South Ring Expressway is scheduled to start construction this year and be completed and opened to traffic in 20 15. The estimated investment is 8.86 billion yuan, which will be connected with the existing Liu Zhonghe Blue Ocean Expressway. The construction of Lanzhou South Ring Expressway can not only guide transit vehicles to the periphery of the city, but also get through the peripheral traffic of Lanzhou, forming the outer ring road of Lanzhou Expressway with Liu Zhong Expressway and Lanhai Expressway, thus alleviating the traffic pressure in the urban area. At the same time, it is of great significance to improve the rapid distribution function of urban traffic in Lanzhou and give play to the radiation function of the central city, laying a good road network pattern for the future development of Lanzhou. At present, the construction drawing design of the southern section of Lanzhou Ring Expressway has been completed, and the civil engineering insurance brokerage agency has started bidding. The planned construction period is 20 13 12 1 to 20 16 10, which also means that Lanzhou South Ring Expressway will start construction soon. The construction of this project is of great significance for perfecting the national highway network planning, improving the transit traffic conditions in Lanzhou, relieving the urban traffic pressure and promoting the regional economic and social development.

Lanzhou South Ring Expressway-Design Highlights

Construction of the first expressway cable-stayed bridge

"Although the length of Lanzhou South Ring Expressway is less than 60 kilometers, the proportion of bridges and tunnels exceeds 70%, and the cost per kilometer is 65.438+0.5 billion yuan. It is the largest investment project per kilometer in our province at present. From the perspective of investment, we can see the design difficulty of this project. " According to the relevant person in charge of Provincial Traffic Planning Survey and Design Co., Ltd., Xigu Bridge, one of the key projects of this project, is a cable-stayed bridge with two towers, three spans and semi-floating system, with a main span of 480 meters. It is the longest span cable-stayed bridge in northwest China and the first expressway cable-stayed bridge in our province. From bridge site selection to bridge type selection to bridge design, only three schemes are made: route and bridge location. After careful comparison and repeated research, the design scheme of long-span cable-stayed bridge with small scale, low cost, good vertical and vertical indexes and strong seismic performance is finally recommended. This bridge is the largest cable-stayed bridge in northwest China and the longest span in China's 8-degree earthquake zone.

Lanzhou south ring expressway-highlights

According to the design scheme, there are 33 bridges, 2 medium bridges 12, 5 interchanges, 8 separated interchanges, 3 passages 1, and service area1. These five interchanges are Dingyuan Hub Interchange, Heping Interchange, Xiguoyuan Hub Interchange, Guangjiaping Interchange and Datan Hub Interchange. Among them, the West Orchard Hub Interchange, as a landmark construction project, is located at the intersection of Lin Lan Expressway and South Ring Expressway. To realize the 8-way interchange between two expressways, a 4-storey large interchange must be designed.

It is understood that all ramps of Xiguoyuan Hub Interchange adopt directional two lanes. The designed ramp has a total length of12km, a bridge deck of more than 50,000 square meters, a pier height of more than 40m and an area of 770.9 1 mu. After completion, it will become the largest hub interchange in our province.

The above is the introduction of Construction Engineering Network to Lanzhou South Ring Expressway. For more information about expressways, please pay attention to the architectural knowledge column of Zhong Da Consulting.

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