Work

Optimization study on artificial ground freezing in elliptical tunnel construction: A comprehensive analysis of groundwater flow and thermodynamic parameters of soil

Year: 2025

Type: article

Abstract: Recently, there has been a growing interest in the use of Artificial Ground Freezing (AGF) to temporarily stabilize unstable ground at tunnel construction sites. Recognizing that the effectiveness of this method is significantly influenced by groundwater flow, it is crucial to conduct a sophisticated thermal-hydraulic coupling analysis to assess the potential adverse effects of groundwater flow in the artificial ground freezing process. This study establishes a numerical analysis model to evaluate the efficiency of AGF and proposes a novel design approach for freeze pipe layouts in elliptical tunnel face under conditions of excessive groundwater flow. These design concepts are implemented using a Gravitational Search Algorithm (GSA) and the COMSOL Multiphysics platform integrated with MATLAB. Furthermore, the study employs a constructed simulation model to analyze and assess the sensitivity of thermodynamic parameters concerning the efficiency of AGF under groundwater flow conditions. The findings contribute valuable insights to the field of tunnel construction and ground stabilization.

Source: Tunnelling and Underground Space Technology

DOI: 10.1016/j.tust.2025.106774

Authors: Gyu-Hyun Go, Viet Dinh Le

Institution: Kumoh National Institute of Technology

Language: English

Topic: Geotechnical Engineering and Analysis

Subfield: Safety, Risk, Reliability and Quality

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,820