19th WORLD CONFERENCE OF THE ASSOCIATED RESEARCH CENTRES FOR THE URBAN UNDERGROUND SPACE, Belgrade, Serbia, November 4-7, 2025. (Paper No: 8.8.57, pp. 1021-1022)
АУТОР(И) / AUTHOR(S): Joseph Z. Hong, Yifeng Li, Zhikai WEI, Xuefeng Li
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DOI: 10.46793/ACUUS2025.8.8.57
САЖЕТАК / ABSTRACT:
The Guangdong-Hong Kong-Macao Greater Bay Area (GBA) is advancing decisively towards high-quality development goals. The Cavern Master Plan (CMP) launched by the Hong Kong Government exemplifies innovative underground space development emerging from this strategic context. This paper focuses on a cavern project, one of the largest in Hong Kong, featuring a maximum excavation face span of 36.2 meters. Using this project as a case study, it systematically investigates the application of the Q-system, Rock Reinforcement Approach (RRA), and construction optimization under complex geological conditions. The Q-system quantifies the engineering characteristics and stability of rockmasses through multi-parameter coupling analysis, providing a scientific basis for decision-making in underground engineering. Addressing Hong Kong’s mountainous terrain and competent rock geology, the project employed the Rock Reinforcement Approach (RRA), integrating rock bolts and shotcrete to form a synergistic support system. Support design was optimized during construction through dynamic Q-value verification and 3D numerical modeling. This approach successfully enabled the excavation of the 36,2-meter super-large span cavern, demonstrating the applicability of the Q-system in composite hard-rock/fractured-rock strata.
КЉУЧНЕ РЕЧИ / KEYWORDS:
Q-system; Rock Reinforcement Approach; Cavern engineering; Construction design; Construction management
ПРОЈЕКАТ / ACKNOWLEDGEMENT:
This paper is sponsored by the Technology Research and Development Project of China State Construction International Holdings Limited (CSCI-2023-Z-17).