Sustainable Design of Artificial Ground Freezing Schemes Based on Thermal-Energy Efficiency Analysis

作者：Jun Hu, Hanyu Dang, Ying Nie, Junxin Shi, Zhaokui Sun, Dan Zhou, Yongchang Yang · 发表于：Sustainability · 年份：2025 · DOI：10.3390/su172210143 · 被引用次数：1 · 研究领域：Climate change and permafrost、Geothermal Energy Systems and Applications、Smart Materials for Construction

To enhance the design and construction efficiency of artificial ground freezing (AGF) in water-rich sandy strata, this study takes the No. 2 cross-passage of Zhengzhou Metro Line 8 as a case study and conducts an integrated analysis combining field monitoring and numerical simulation. During the freezing process, a sensor network was deployed to capture real-time data on temperature distribution and pore water pressure evolution. Based on the collected measurements, a three-dimensional hydrothermal coupled model was developed using COMSOL Multiphysics 6.1 and validated against field data. The results demonstrate a distinct multi-stage evolution in the formation of the frozen curtain, with the highest heat exchange rate observed at the initial phase. Under a 50-day freezing schedule, increasing the average coolant temperature by 4 °C still yielded a frozen wall that meets the design thickness requirement. Additionally, several cost-effective freezing schemes were explored to accommodate varying construction timelines. This study supports sustainable urban infrastructure development by minimizing energy consumption during artificial ground freezing (AGF) processes.