📋 Tender Overview
Deep in the Taihang Mountains, at the construction site of the third branch of the Shitai Expressway renovation and expansion project, bridge erecting machines and other equipment are operating in a busy manner. As of the end of April, the renovation and expansion project has completed a total annual investment of 440 million yuan, accounting for 33.6% of the annual plan, and is expected to be completed and put into use in October this year. Shitai Expressway is an important part of the Qingyin Expressway and an important energy transportation channel to the east and west of my country. In recent years, traffic volume has increased year by year, and the traffic guarantee capacity urgently needs to be improved. In 2022, the Shitai Expressway renovation and expansion project started. The project starts from the toll station at the west port of Shijiazhuang, Hebei Province and ends at the boundary of Hebei-Shenzhen Province. It has a total length of 51.6 kilometers. It adopts the renovation and expansion plan of the original road width + half of the local new space and is widened from a two-way 4 lane to 8 lanes (partial 6 lanes). As the first mountain expressway in Hebei Province to be fully renovated and expanded, the Shitai Expressway is located in the foothills, with scarce corridor resources and a high proportion of heavy-duty vehicles. It has high requirements for durability of structures such as road surfaces and bridges, as well as full-factor and full-cycle carbon emission reduction. In combination with the characteristics of the project and the geological and geomorphological characteristics along the route, at the beginning of the construction, the project team carried out technical research and development and promotion of results around the carbon neutrality goal. At the construction site of Dalongwo Bridge No. 1, the project team adopted the bridge in-situ regeneration technology to realize concrete reuse. A special planting soil storage area was set up along the line. After the project was completed, the soil could continue to be used. In order to extend the service life of the pavement and bridges, the project team used ultra-high amount of glue powder modified asphalt and applied highway super-thick vertical compaction technology to ensure that a strong and non-prone highway is built. The renovation and expansion project will simultaneously create a carbon neutral service area, and use energy storage heating technology to reduce energy consumption. Distributed photovoltaic panels will be installed at highway subgrade slopes and other locations. At the same time, an integrated highway carbon neutrality supervision and control platform based on digital twin technology has been developed to realize carbon emission monitoring, big data mining and other management.
