INFLUENCING FACTORS ANALYSIS OF BEARING CAPACITY OF DEEP UNDERGROUND SPACE AND EVALUATION METHODS IN A COASTAL SOFT SOIL MEGA CITY: A CASE STUDY OF SHANGHAI

19th WORLD CONFERENCE OF THE ASSOCIATED RESEARCH CENTRES FOR THE URBAN UNDERGROUND SPACE, Belgrade, Serbia, November 4-7, 2025. (Paper No: 3.5.179,  pp. 496-506)

 

АУТОР(И) / AUTHOR(S): Jianxiu Wang, Yanxia Long, Tongzhen Cui, Hanmei Wang, Xinlei Huang, Yuanbo Gao, Jianzhong Wu, Weiqiang Pan

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DOI:  10.46793/ACUUS2025.3.5.179

САЖЕТАК / ABSTRACT:

Shanghai, a coastal megacity built on soft deltaic soil, faces growing demand for deep underground space (DUS) development as its shallow and intermediate layers approach saturation. However, the complex interplay of geological, hydrogeological, and environmental factors significantly constrains the carrying capacity of DUS. This study investigates the bearing capacity of DUS in Shanghai as a representative coastal soft soil city. Through systematic analysis of deep stratigraphic conditions, confined aquifer systems, and environmental geological risks (e.g., land subsidence, liquefaction, and gas escape), the key influencing factors are identified. Special attention is given to the coupled effects of thermal–hydraulic–mechanical–chemical (THMC) processes. Based on these insights, a multi-dimensional evaluation index system is proposed, incorporating geotechnical, hydrogeological, environmental, and spatial utilization factors. The framework provides a basis for carrying capacity assessment under current engineering conditions. The findings offer methodological guidance and geological support for the planning and sustainable development of DUS in Shanghai and similar coastal cities.

КЉУЧНЕ РЕЧИ / KEYWORDS:

Deep Underground Space, Coastal Soft Soil, Bearing Capacity, Evaluation index, Influencing Factors Analysis

ПРОЈЕКАТ / ACKNOWLEDGEMENT:

This research was funded by the Shanghai Municipal Science and Technology Project (18DZ1201301; 19DZ1200900); Shanghai Institute of Geological Survey (2023(D)-003(F)-02); Key Laboratory of Land Subsidence Monitoring and Prevention, Ministry of Natural Resources of the People’s Republic of China (No. KLLSMP202101; KLLSMP202201); Shanghai Municipal Science and Technology Major Project (2021SHZDZX0100) and the Fundamental Research Funds for the Central Universities

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