Zhuguang Road, the first double-decker "Lego" tunnel in the country, opened to traffic

Fully prefabricated assembly of the internal structure of the double-layer shield tunnel

The Zhuguang Road Tunnel is an important supporting project of the Shanghai National Convention and Exhibition Center. Its opening to traffic will greatly improve the traffic conditions around the venues of the second China International Import Expo.

Combination of "Industry, Study and Research"

Adopt the earth pressure balance shield with the largest diameter in China

The first "double-layer fully prefabricated assembly" tunnel in China

The Zhuguang Road project runs along Jinfeng Road - Zhuguang Road from north to south. The total length of the passage is about 2800m, of which the length of the shield tunnel is 1390m. It adopts a single-tube shield stacked arrangement. The ground road adopts a two-way 4-speed 2-slow design, breaking through the barrier between Qingpu District and Minhang, turning the "broken road" into a "plain road", realizing the "district connection", and promote the rapid economic development of Qingpu and Minhang districts.

"Lego-style" smart construction

The Zhuguang Road channel has the characteristics of "traffic corridor, environmentally sensitive, numerous facilities, and narrow space", and the construction conditions of the project are complex and there exist many control factors.

The large shield design team of the Headquarters adheres to the concept of "relationship with reality, pioneering and innovative". In this project, through the combination of "production, learning, and research", it continuously overcomes technical problems; after repeated trials and continuous verification, the project plan is continuously optimized , And finally achieved the first full prefabrication of the internal structure of the double-layer shield tunnel in the country.

In the internal structure of the circular tunnel, the "π"-shaped parts, prefabricated columns, upper lane slabs, cover slabs on both sides and upper anti-collision side stones are all prefabricated and assembled. Factory-based and standardized production of prefabricated components realizes "Lego-style" intelligent construction.

The application of prefabricated assembly technology reduces the large turnover of steel formwork and other materials and the movement of material transportation vehicles, thereby reducing carbon emissions in the construction tunnel, greatly improving the construction environment, and achieving fast, excellent and beautiful project construction. Really achieve green construction and become the only project that has won the honor of "Shanghai Major Project Civilized Construction Upgrade Demonstration Project" for two consecutive years.

Leading industry standard

In order to better ensure the quality of prefabricated assembly construction, the General Institute, the construction party and the construction unit jointly compiled the "Shield Method Tunnel Engineering Prefabricated Internal Structure Prefabricated Components Production and Installation Quality Acceptance Standard" to provide guidance and basis for the prefabricated assembly construction process . The final construction verticality is controlled within 1‰, the installation level and vertical deviation are controlled within ±5mm, and the assembled structure has the effect of fair-faced concrete.

Less than a hundred days before the start of the second International Import Expo, the main line of Zhuguang Road Tunnel will form a northern expressway with S26 entering the city after the trial opening, providing a new channel for external connections between the "Clover" and the West Hongqiao area, enabling The traffic from the northern region to the National Convention and Exhibition Center in Shanghai smoother, faster and more flexible, which will greatly ease the traffic pressure during the second CIIE.