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Advances in Permafrost
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Advances in Permafrost

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: 20 February 2025 | Viewed by 1294

Special Issue Editor

Dr. Fuqing Cui

E-Mail Website
Guest Editor
College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Interests: engineering safety analysis; permafrost heat and mass transfer; structure service performance evaluation; geological diseases prediction and prevention

Special Issue Information

Dear Colleagues,

The reliability and safety of permafrost facilities are objectives currently pursued in the field of engineering. Due to their huge economic and technological appeal, numerous modeling, optimization, and application techniques have been developed and are capturing the interest of researchers in various fields.

This Special Issue, entitled “Advances in Permafrost”, aims to collect high-quality and original research papers on the testing of permafrost, simulation, and the application of disease control technology in various domains. We encourage researchers to highlight the latest developments in this research field or to invite relevant experts or colleagues to do so. The scope of this Special Issue includes, but is not limited to, the following topics:

  • Permafrost mechanics and permafrost physics
  • Permafrost dynamics and engineering response
  • Coupled theory and numerical methods for multiphysics in permafrost
  • Theory, simulation and experimental analysis of permafrost engineering structures disease mechanisms
  • Interactions between permafrost and environment
  • Green and low-carbon technology for permafrost engineering
  • Artificial freezing theory and technology
  • Ecology and hydrology of permafrost regions
  • Permafrost testing and monitoring technology

Dr. Fuqing Cui
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • permafrost mechanics
  • permafrost thermodynamics
  • permafrost and environment
  • green and low-carbon technology
  • artificial freezing
  • permafrost ecology
  • permafrost hydrology
  • permafrost testing and monitoring methods

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Published Papers (2 papers)

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Research

23 pages, 8611 KiB  
Article
An Analysis of Vertical Infiltration Responses in Unsaturated Soil Columns from Permafrost Regions
by Lincui Li, Xi’an Li, Yonghong Li, Cheng Li, Yong Li, Li Wang, Yiping He and Chaowei Yao
Appl. Sci. 2024, 14(22), 10195; https://doi.org/10.3390/app142210195 - 6 Nov 2024
Viewed by 465
Abstract
Rainfall infiltration affects permafrost-related slope stability by changing the pore water pressure in soil. In this study, the infiltration responses under rainfall conditions were elucidated. The instantaneous profile method and filter paper method were used to obtain the soil–water characteristic curve (SWCC) and [...] Read more.
Rainfall infiltration affects permafrost-related slope stability by changing the pore water pressure in soil. In this study, the infiltration responses under rainfall conditions were elucidated. The instantaneous profile method and filter paper method were used to obtain the soil–water characteristic curve (SWCC) and hydraulic conductivity function (HCF). During the rainfall infiltration test, the vertical patters of volumetric moisture contents, total hydraulic head or suction and wetting front were recorded. Advancing displacement and rate of the wetting front, the cumulative infiltration, the instantaneous infiltration rate, and the average infiltration rate were determined to comprehensively assess the rainfall infiltration process, along with SWCC and HCF. Additionally, the effects of dry density and runoff on the one-dimensional vertical infiltration process of soil columns were evaluated. The results showed that the variation curve of wetting front displacement versus time obeys a power function relationship. In addition, the infiltration rate–time relationship curve and the unsaturated permeability curve could be roughly divided into three stages, and the SWCC and HCF calculated by volumetric moisture content are more sensitive to changes in dry density than to changes in runoff or hydraulic head height. Full article
(This article belongs to the Special Issue Advances in Permafrost)
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18 pages, 6905 KiB  
Article
Investigation of Temperature Variation Characteristics and a Prediction Model of Sandy Soil Thermal Conductivity in the Near-Phase-Transition Zone
by Jine Liu, Panting Liu, Huanquan He, Linlin Tang, Zhiyun Liu, Yue Zhai and Yaxing Zhang
Appl. Sci. 2024, 14(20), 9337; https://doi.org/10.3390/app14209337 - 14 Oct 2024
Viewed by 631
Abstract
Soil thermal conductivity in the near-phase-transition zone is a key parameter affecting the thermal stability of permafrost engineering and its catastrophic thermal processes. Therefore, accurately determining the soil thermal conductivity in this specific temperature zone has important theoretical and engineering significance. In the [...] Read more.
Soil thermal conductivity in the near-phase-transition zone is a key parameter affecting the thermal stability of permafrost engineering and its catastrophic thermal processes. Therefore, accurately determining the soil thermal conductivity in this specific temperature zone has important theoretical and engineering significance. In the present work, a method for testing the thermal conductivity of fine sandy soil in the near-phase-transition zone was proposed by measuring thermal conductivity with the transient plane heat source method and determining the volumetric specific heat capacity by weighing unfrozen water contents. The unfrozen water content of sand specimens in the near-phase-transition zone was tested, and a corresponding empirical fitting formula was established. Finally, based on the testing results, temperature variation trends and parameter influence laws of thermal conductivity in the near-phase-transition zone were analyzed, and thermal conductivity prediction models based on multiple regression (MR) and a radial basis function neural network (RBFNN) were also established. The results show the following: (1) The average error of the proposed test method in this work and the reference steady-state heat flow method is only 7.25%, which validates the reliability of the proposed test method. (2) The variation in unfrozen water contents in fine sandy soil in the range of 0~−3 °C accounts for over 80% of the variation in the entire negative temperature range. The unfrozen water content and thermal conductivity curves exhibit a similar trend, and the near-phase-transition zone can be divided into a drastic phase transition zone and a stable phase transition zone. (3) Increases in the thermal conductivity of fine sandy soil mainly occur the drastic phase transition zone, where these increases account for about 60% of the total increase in thermal conductivity in the entire negative temperature region. With the increase in density and total water content, the rate of increase in thermal conductivity in the drastic phase transition zone gradually decreases. (4) The R2, MAE, and RSME of the RBFNN model in the drastic phase transition zone are 0.991, 0.011, and 0.021, respectively, which are better than those of the MR prediction model. Full article
(This article belongs to the Special Issue Advances in Permafrost)
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