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Research paper | Open Access

A study on impacts of groundwater seepage on artificial freezing process of gravel strata

Tianliang Wang1( ), Ya-Meng He2, Zhen Wu3, Jun-jun Li4
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China
State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, China
Jinan Design Institute, China Railway Engineering Consulting Group Co., Ltd., Jinan, China
School of Civil Engineering, Shijiazhuang Institute of Railway Technology, Shijiazhuang, China
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Abstract

Purpose

This paper aims to study the impacts of groundwater seepage on artificial freezing process of gravel strata, the temperature field characteristics of the strata, and the strata process, closure time and thickness evolution mechanism of the frozen wall.

Design/methodology/approach

In this paper several laboratory model tests were conducted, considering different groundwater seepage rate.

Findings

The results show that there is a significant coupling effect between the cold diffusion of artificial freezing pipes and groundwater seepage; when there is no seepage, temperature fields upstream and downstream of the gravel strata are symmetrically distributed, and the thickness of the frozen soil column/frozen wall is consistent during artificial freezing; groundwater seepage causes significant asymmetry in the temperature fields upstream and downstream of the gravel strata, and the greater the seepage rate, the more obvious the asymmetry; the frozen wall closure time increases linearly with the increase in the groundwater seepage rate, and specifically, the time length under seepage rate of 5.00 m d−1 is 3.2 times longer than that under no seepage; due to the erosion from groundwater seepage, the thickness of the upstream frozen wall decreases linearly with the seepage velocity, while that of the downstream frozen wall increases linearly, resulting in a saddle-shaped frozen wall.

Originality/value

The research results are beneficial to the optimum design and risk control of artificial freezing process in gravel strata.

Keywords

Temperature fieldGroundwater seepageUnderground worksGravel strataArtificial freezingFrozen wall

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Railway Sciences
Volume 2 Issue 1,
April 2023
Pages 1-12
DOI: 10.1108/RS-01-2023-0004
Cite this article:
Wang T, He Y-M, Wu Z, et al. A study on impacts of groundwater seepage on artificial freezing process of gravel strata. Railway Sciences, 2023, 2(1): 1-12. https://doi.org/10.1108/RS-01-2023-0004

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Received: 27 January 2023
Revised: 03 February 2023
Accepted: 03 February 2023
Published: 28 March 2023
© Tianliang Wang, Ya-Meng He, Zhen Wu and Jun-jun Li. Published in Railway Sciences.

This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
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