UCD Wins 4 Honors like Special Prize of CCTA Science and Technology Progress Awards

The China Communications and Transportation Association (CCTA) recently held a commendation conference for the Science and Technology Progress Awards. UCD won the special prize of the CCTA Science and Technology Progress Awards for the project called "Key technology of efficient operation and control of super-large subway network and its application", the first prize for the project called "Key technology of efficient construction and safety control of large shield tunnels in strongly developed karst strata in sea area", and the second prize of the Technological Invention Award for the project called "Key technology of panoramic safe construction of subway projects in soil-rock composite stratum and its application". Additionally, it won the second prize of the 2024 China Association of Metros (CAMET) Science and Technology Progress Awards for the project called "Intelligent online monitoring and maintenance management technology of urban rail transit underground infrastructure and its application".

Special prize of CCTA Science and Technology Progress Awards
Key technology of efficient operation and control of super-large subway network and its application

The project was designed to solve technical problems in the super-large subway network, including unclear understanding of demand, poor organization of train running and insufficient operational coordination. A technology package system of "passenger flow sensing and forecasting - precise train control - network resilience improvement" has been established, and a multi-dimensional, full-scenario dynamic passenger flow sensing and forecasting technology was proposed. Breakthroughs were made in the technology of multi-objective-driven efficient networked operation of subway trains. The technology developed is the collaborative passenger-train control technology of the super-scale subway network based on train-passenger flow coupling. The results of the project have been promoted and applied in many cities, including Beijing, Shenzhen and Suzhou, which significantly strengthens the government's dynamic monitoring, forecasting and warning, and emergency handling capabilities of subway passenger flow, playing an important role in the daily efficient operation of the subway and the safety assurance of major events.

First prize of CCTA Science and Technology Progress Awards
Key technology of efficient construction and safety control of large shield tunnels in strongly developed karst strata in sea area

The project was designed to solve technical problems in the construction and operation of undersea tunnels, such as complex geological conditions, harsh service environment, construction difficulty, high risk of safe construction and stable operation. The research was carried out based on a number of typical projects such as Dalian Bay Undersea Tunnel (the world's first large shield undersea tunnel in a karst stratum) in the city's metro line. Proposed is the whole-chain safe construction monitoring technology of "advance sensing and forecasting - shield attitude control - structure state prediction and feedback". A global inference method for structure state was developed, a wide-area stereoscopic monitoring system with "point, line, plane and solid" coordination was established, and a digital-twin-driven big data model security management platform for large undersea shield tunnels was developed. The results of the project have been fully applied in the undersea tunnel of Dalian Metro Line 5, and extended to Guiyang Metro, Qingdao Metro and other projects, which greatly promoted the development of karst-stratum shield tunnelling technology, and boosted the development of tunnel and underground engineering disciplines and scientific and technological progress in China.

Second prize of CCTA Technological Invention Award
Key technology of panoramic safe construction of subway projects in the soil-rock composite stratum and its application

The project was designed to tackle the key engineering problems, such as difficult selection of a subway station construction method, redundancy in design of rock-stratum subway tunnel structure and difficult selection of a waterproof and drainage system. Through innovation in basic theory, design method, construction technology and auxiliary assembly, researchers invented a composite construction system of subway stations in the soil-rock composite stratum, which encompasses open-cut, undercutting, cut-and-cover, bottom-up and top-down methods, and a complete design method of the waterproof and drainage system for rock-stratum single-lined tunnel structures. The key technology of panoramic safe construction of subway projects in the soil-rock composite stratum was finally created. The results of the project have been successfully applied in many urban subway projects in China. The project has a positive demonstration effect and plays a leading role in the field of construction of rail transit projects in cities with soil-rock composite strata in the country.

Second prize of CAMET Science and Technology Progress Awards
Intelligent online monitoring and maintenance management technology of urban rail transit underground infrastructure and its application

In the project, the research was carried out on the technical problems in the traditional operation and maintenance mode of urban rail underground infrastructure, such as low detection efficiency, poor disease diagnosis and high maintenance cost. Constructed is the full-lifecycle intelligent operation and maintenance technology system of "holographic monitoring - intelligent diagnosis - preventive maintenance", and developed is the online multi-parameter monitoring equipment of trail tunnels integrating optical fiber sensing and dynamic loading. An accurate disease diagnosis and performance evaluation technology based on spatiotemporal grid and multi-modal data was proposed. Breakthroughs were made in the networked preventive maintenance strategy and job scheduling optimization technology based on performance adaptive learning. The results of the project have been promoted and applied in subway projects in cities, including Beijing, Dalian and Suzhou, providing important technical support for ensuring subway operation safety, improving operation and maintenance efficiency, and promoting the construction of smart subway.