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Processes
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Recent Advances in Environment and Energy Related Processes in Offshore...
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Recent Advances in Environment and Energy Related Processes in Offshore Geotechnical Engineering

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: 31 August 2025 | Viewed by 2997

Special Issue Editors

Dr. Xiang Sun

E-Mail Website
Guest Editor
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Interests: numerical simulation of deep water geo-environment; geotechnical modeling in offshore geotechnical engineering; physics-informed neural network method in energy engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Lujun Wang

E-Mail Website
Guest Editor
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Interests: thermo-hydro-mechanical processes in porous media; computational soil mechanics; offshore geotechnical engineering; centrifuge modelling
Dr. Yuze Wang

E-Mail Website
Guest Editor
Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Interests: seabed stabilization; marine bio-geotechnics for ocean negative emission; marine energy geotechnics
Dr. Zhixiang Chen

E-Mail
Guest Editor
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Interests: geo-environmental processes and contaminated soil remediation; offshore geotechnology and geo-environmental science; multiscale testing techniques for geo-environmental materials

Special Issue Information

Dear Colleagues,

Offshore geotechnical engineering is an intricate discipline that encompasses a variety of challenges, from dealing with deep-sea environmental conditions to ensuring the stability and safety of offshore structures. Central to these challenges is the understanding and characterization of the environment- and energy-related processes that play a pivotal role in the design, construction, and operation of offshore facilities. This Special Issue, titled “Recent Advances in Environment- and Energy-Related Processes in Offshore Engineering”, aims to bring together cutting-edge research, innovative methodologies, and the latest findings in offshore geotechnical engineering.

Contributors are encouraged to submit papers that delve into areas such as the development of renewable marine energy; structure–environment interactions; environmental geomechanics; multiphasic, multiprocess simulation for offshore engineering; and innovative solutions for offshore geotechnics. Manuscripts that present novel numerical models, experimental setups, or case studies that provide insights into aspects of the environmental and energy processes of offshore geotechnical engineering are particularly welcome.

Through this Special Issue, we aspire to foster a deeper understanding of the environment- and energy-related processes that govern offshore geotechnical engineering, ultimately advancing the state of the art in this critical field. The knowledge we gather can significantly influence the design of more resilient offshore infrastructure, ensuring safer operations for challenging marine environments and energies.

We invite both researchers and industry professionals to contribute to this endeavor to build a comprehensive repository of knowledge that bridges the gap between theory and practical application in offshore engineering.

Dr. Xiang Sun
Dr. Lujun Wang
Dr. Yuze Wang
Dr. Zhixiang Chen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Processes is an international peer-reviewed open access monthly 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

  • offshore geotechnical engineering
  • environmental geomechanics
  • energy geomechanics
  • wind turbine foundations
  • structure–environment interaction
  • ocean engineering
  • offshore energy engineering
  • offshore environmental engineering
  • offshore mining
  • island and reef engineering

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

16 pages, 7753 KiB  
Article
Hyperbolic Evolutionary Model for Equivalent Modulus of Sand and Characterization of Its Cyclic Hardening Properties
by Xueqing Wu, Longtan Shao, Xiaojian Tian and Pingxin Xia
Processes 2024, 12(11), 2550; https://doi.org/10.3390/pr12112550 - 14 Nov 2024
Viewed by 512
Abstract
The cyclic hardening characteristics of soil hold significant importance for understanding its performance, and the evolution of the deformation modulus serves as a crucial indicator of the hardening properties. Deformations can be classified into elastic and plastic deformations and expressed in terms of [...] Read more.
The cyclic hardening characteristics of soil hold significant importance for understanding its performance, and the evolution of the deformation modulus serves as a crucial indicator of the hardening properties. Deformations can be classified into elastic and plastic deformations and expressed in terms of modulus; however, their roles in the cyclic hardening process remain unclear. In this study, the elastic and plastic moduli were separated using the hyperbolic evolutionary model, which characterized the evolutionary properties of both to reflect the cyclic hardening process. A series of cyclic triaxial shear tests was conducted utilizing ISO sand and emery as test materials. A hyperbolic evolution model relating the equivalent modulus to the number of cycles was established, and the effect of various test conditions on the elastic modulus is discussed. The results indicate that: (1) the relationship between the equivalent modulus and the number of cycles is hyperbolic; and (2) the parameters k and b of the hyperbolic evolution model correspond to the elastic and plastic moduli, allowing for the separation of the evolution of both from that of the deformation modulus. The hyperbolic evolution model of the equivalent modulus proposed in this paper offers new insight into the cyclic hardening properties of sand. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Related Processes in Offshore Geotechnical Engineering)
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15 pages, 13849 KiB  
Article
Effect of Uniaxial Tension on the Permeability of Geotextile-Sand System under Different Water Flow Conditions
by Xiaolei Man, Depeng Jin, Xueli Liu, Yun Chen and Hao Qu
Processes 2024, 12(9), 1954; https://doi.org/10.3390/pr12091954 - 12 Sep 2024
Viewed by 443
Abstract
To investigate the influence of uniaxial tension on the permeation characteristics of the Geotextile-sand system under different water flows, a self-developed multifunctional gradient ratio permeameter was used to conduct relevant permeation tests on three commonly used geotextiles in engineering. The study, respectively, explores [...] Read more.
To investigate the influence of uniaxial tension on the permeation characteristics of the Geotextile-sand system under different water flows, a self-developed multifunctional gradient ratio permeameter was used to conduct relevant permeation tests on three commonly used geotextiles in engineering. The study, respectively, explores the variations in seepage velocity and gradient ratio of the Geotextile-sand system under different uniaxial tension strains with unidirectional water flow and reciprocating water flow, as well as the effects of different water flows on the system under the same uniaxial tension strain. The test results indicate that the trends of gradient ratio and seepage velocity in geotextiles are consistent under different water flows; however, the gradient ratio under reciprocating flow is smaller, while the seepage velocity is greater compared to unidirectional flow. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Related Processes in Offshore Geotechnical Engineering)
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23 pages, 8840 KiB  
Article
Study on the Evolution of Mechanical Properties and Acoustic Emission of Medium-Permeability Sandstone under Multi-Level Cyclic Loading Stress Paths
by Debin Xia, Hejuan Liu, Jianjun Liu, Yintong Guo, Mancang Liu, Xiaosong Qiu, Haibo Li, Hongying Tan and Jun Lu
Processes 2024, 12(8), 1773; https://doi.org/10.3390/pr12081773 - 21 Aug 2024
Viewed by 681
Abstract
Depleted gas reservoirs are important natural gas storage media, thus research on the mechanical properties and damage evolution of reservoir rocks under alternating load conditions has significant practical implications for seal integrity studies. This paper conducted multi-level cyclic loading triaxial compression experiments on [...] Read more.
Depleted gas reservoirs are important natural gas storage media, thus research on the mechanical properties and damage evolution of reservoir rocks under alternating load conditions has significant practical implications for seal integrity studies. This paper conducted multi-level cyclic loading triaxial compression experiments on medium-porosity medium-permeability sandstone under different confining pressures and used acoustic emission (AE) instruments to detect the AE characteristics during the experiment, analyzing the mechanical characteristics, AE, and damage evolution characteristics. The experimental results show that after cyclic loading, the peak strength of sandstone increased by 14–17%. With the increase in the upper limit stress of cyclic loading, the elastic modulus showed a trend of first increasing and then gradually decreasing. The damage variable of rock samples rose with a rise in the upper limit stress of cyclic loading and confining pressure, and the rock damage was mostly localized at the peak stress. The AE b-value increased generally as confining pressure increased, showing that fractures occurred quicker and more unevenly at lower confining pressures. The distribution of RA-AF values shows that a sudden increase in stress causes the initiation and expansion of cracks in medium-permeability sandstone, and that tensile and shear cracks form continuously during the cyclic loading process, with shear cracks developing more pronounced. This research can provide some theoretical guidance for the long-term stable operation and pressure enhancement expansion of depleted gas reservoir storage facilities. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Related Processes in Offshore Geotechnical Engineering)
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15 pages, 6917 KiB  
Article
Study on the Influencing Factors of Injection Blockage during CO2 Sequestration in One-Dimensional Long Reactor
by Yi Zhang, Houzhen Wei, Jinxin Liu and Xiaolong Ma
Processes 2024, 12(5), 960; https://doi.org/10.3390/pr12050960 - 9 May 2024
Viewed by 836
Abstract
Carbon sequestration through CO2 injection into a formation is an effective strategy for reducing greenhouse gas emissions. In this study, a one-dimensional long reactor was constructed to simulate the CO2 injection process under various sediment temperatures, pressures, and flow rates. The [...] Read more.
Carbon sequestration through CO2 injection into a formation is an effective strategy for reducing greenhouse gas emissions. In this study, a one-dimensional long reactor was constructed to simulate the CO2 injection process under various sediment temperatures, pressures, and flow rates. The formation of CO2 hydrate and the resulting blockages were investigated in detail through a series of indoor experiments. Due to the increasing driving force for CO2 hydrate formation, reducing sediment temperature and increasing sediment pressure can cause hydrate blockage to form near the injection end, leading to an increase in CO2 injection pressure and a reduction in the storage range. Furthermore, CO2 injection rate has a substantial impact on the pattern of hydrate blockage. A lower injection rate facilitates full contact between CO2 gas and pore water, which helps to increase the formation and blockage degree of CO2 hydrates, thereby decreasing the amount of CO2 injection. The experimental investigation presented in this paper examines the laws of CO2 injection and clogging under various sediment conditions and injection processes on a one-dimensional scale, which can provide valuable insights for the design of CO2 sequestration processes. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Related Processes in Offshore Geotechnical Engineering)
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