Design of the South Section 2 of the East Longitudinal Road in Gui'an New Area

Project Overview:

The East Vertical Route in Gui'an New Area is a crucial link and backbone road network connecting Guiyang and Gui'an. It extends southward to Huishui County, where it connects with the Hua'an Expressway at Kaidaba, and northward to Guanshanhu District in Guiyang City, linking up with the Shanghai-Kunming Expressway at Jinhua Town. The second southern section of the East Vertical Route is an important component of the entire East Vertical Route in Gui'an New Area. This 5.3-kilometer-long urban expressway is designed for a maximum speed of 80 km/h, featuring eight lanes in each direction on the main roadway and six lanes in each direction on the auxiliary roadways, with a subgrade width of 70 meters. The construction of this project has effectively addressed the need for rapid transit and seamless connectivity to the Hua'an Expressway in the eastern part of Gui'an New Area, thereby driving the rapid development of industries along the route.

Project Highlights:

1. The project design places great emphasis on the overall transportation function and aims to create diversified, multi-level road intersections. Along the project route, there are numerous intersections with roads such as Qianzhong Avenue and the Kaidaba Connector of the Hua'an Expressway. In light of the road network planning and the traffic demands at each intersection, the project team has selected the most appropriate intersection types while ensuring that transportation needs are fully met. These include hub interchanges, single-bell-shaped interchanges, diamond interchanges, and separated interchanges—each of which effectively minimizes land use and saves on investment costs.

2. The project emphasizes innovative design and proposes a solution that simultaneously considers both main and auxiliary road entrances and exits, as well as a design in which the median strip is locally offset by one lane to serve as an acceleration/deceleration section for entrances and exits. This solution effectively addresses the shortcomings of conventional designs, such as large land occupation and unsmooth alignment of acceleration and deceleration lanes.

3. During the project design phase, priority was given to the smart sponge city design concept. The smart rainwater management solution adopted includes side-separated depressed channels for water storage, rainwater collection through strategically spaced openings in curb stones on both sides, and rainwater inspection wells equipped with gridded manhole covers for regulation and storage. Combined with permeable pavement bricks laid on sidewalks, this approach effectively facilitates the accumulation, infiltration, and purification of rainwater within urban areas, thereby minimizing the impact of urban development and construction on the ecological environment, and promoting the efficient utilization of rainwater resources while safeguarding the ecological environment.

4. The project’s roadbed slopes all employ vegetation-covered shrub slopes, diamond-grid slopes, and T-shaped vegetated panel slopes, among other forms. Combined with a multi-layered greening scheme featuring trees, shrubs, and grasses in green belts, ecological slope designs for riverbanks, and the reuse of topsoil, the project has successfully transitioned from “greenery along the roadside” to “urban green corridors.”

Honored Achievements:

Second Prize, Guizhou Province Outstanding Survey and Design Award;
Third Prize for Technological Innovation in Civil and Architectural Engineering, Guizhou Province.

Project Showcase: