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Applied Sciences
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State of the Art of Rock Mechanics and Geotechnical Engineering
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State of the Art of Rock Mechanics and Geotechnical Engineering

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

Deadline for manuscript submissions: 20 September 2024 | Viewed by 2589

Special Issue Editors

Prof. Dr. Tao Liu

E-Mail Website
Guest Editor
1. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China
2. Laboratory for Marine Geology, Qingdao National Laboratory for Maine Science and Technology, Qingdao 266061, China
Interests: marine geotechnical engineering
Prof. Dr. Dongsheng Xu

E-Mail Website
Guest Editor
School of Civil Engineering and Mechanics, Wuhan University of Technology, Wuhan 430070, China
Interests: soil mechanics; coral reef island; smart sensing technology; safety protection
Special Issues, Collections and Topics in MDPI journals
Dr. Baifeng Ji

E-Mail Website
Guest Editor
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Interests: soil mechanics; coral reef island; smart sening technology; safety protection
Dr. Yue Qin

E-Mail Website
Guest Editor
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
Interests: soil mechanics; coral reef island; smart sening technology; safety protection

Special Issue Information

Dear Colleagues,

Past damage in geotechnical engineering-related soil dynamics underlines the importance of accurate assessments of soil dynamic behaviors. The assessment required shared and interdisciplinary research involving geotechnical engineers, seismologists, geologists, and geophysicists. The state of the art of soil dynamics and geotechnical engineering evaluates these various areas of research focusing on those developed within the past few years. The new theoretical analyses, practical developments, and recommended strategies could enhance the development of geotechnical engineering. Potential topics include, but are not limited to, the following:

  • Rock mechanics and geotechnical engineering experiments, testing methods and monitoring techniques;
  • Numerical analysis and simulation techniques of rock mechanics and geotechnical engineering;
  • Multi-field coupling effects and multiphase and multi-scale mechanics of geotechnical engineering; geotechnical engineering mechanical equipment and new construction techniques;
  • Underground space, foundation, foundation pit, slope and dam engineering.

Prof. Dr. Tao Liu
Prof. Dr. Dongsheng Xu
Dr. Baifeng Ji
Dr. Yue Qin
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. 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.

Published Papers (3 papers)

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Research

15 pages, 4916 KiB  
Article
Analysis of the Fracture Characteristics and Crack Propagation Mechanism of Fractured Sandstone under Dynamic Loading
by Qi Ping and Xiangyang Li
Appl. Sci. 2024, 14(5), 2042; https://doi.org/10.3390/app14052042 - 29 Feb 2024
Viewed by 435
Abstract
In order to study the impact of fracture thickness on the dynamic mechanical properties of rock specimens, impact compression tests on prefabricated sandstone specimens with different fracture thicknesses and intact specimens were carried out by using a split Hopkinson pressure bar (SHPB) test [...] Read more.
In order to study the impact of fracture thickness on the dynamic mechanical properties of rock specimens, impact compression tests on prefabricated sandstone specimens with different fracture thicknesses and intact specimens were carried out by using a split Hopkinson pressure bar (SHPB) test device, and the dynamic mechanical parameters of the fractured sandstone specimens were obtained. The results showed that the dynamic stress–strain curves of the prefabricated fractured sandstone specimens are similar to those of the intact sandstone specimens, which can be divided into three stages: elasticity, plasticity, and failure. With the increase in the thickness of prefabricated cracks, the dynamic compressive strength of the sandstone specimens decreases in a quadratic function, the dynamic strain decreases in a power exponential function, and the dynamic elastic modulus decreases linearly. Attempts were made to quantitatively analyze the crushing degree of sandstone specimens. The average particle size of the crushed specimens was negatively correlated with the thickness of prefabricated cracks, and the fractal dimension was linearly negatively correlated with the dynamic compressive strength. The 1.5–2.5 mm prefabricated fractured sandstone specimens produced airfoil cracks and secondary cracks; the 3–3.5 mm prefabricated fractured specimens produced airfoil cracks, coplanar secondary cracks, and secondary oblique cracks; and the complete specimens were subjected to axial failure to produce axial cracks. Full article
(This article belongs to the Special Issue State of the Art of Rock Mechanics and Geotechnical Engineering)
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14 pages, 5519 KiB  
Article
Study on the Characteristics of Effective Internal Friction Angles of Silty Clay from the Yellow River Delta and the Inverse Method of CPTu Testing
by Huazhong Qi, Han Wang, Chao Yan, Yuanzhe Zhan and Keliang Qiang
Appl. Sci. 2023, 13(19), 10724; https://doi.org/10.3390/app131910724 - 27 Sep 2023
Viewed by 745
Abstract
This study focuses on the silty clay of the Yellow River Delta, conducting laboratory experiments to explore the strength characteristics of typical silty clay in the Yellow River Delta. The study utilizes CPTu calibration chamber tests to systematically reveal the features of cone [...] Read more.
This study focuses on the silty clay of the Yellow River Delta, conducting laboratory experiments to explore the strength characteristics of typical silty clay in the Yellow River Delta. The study utilizes CPTu calibration chamber tests to systematically reveal the features of cone tip resistance (qt), side friction resistance (fs), and pore water pressure (u2) of the silty clay. This research provides a theoretical basis for Delta investigation in the Yellow River region. The study compares the applicability of existing CPTu inversion methods and highlights the NTH method’s advantages in evaluating silty clay’s effective internal friction angle. Supported by indoor calibration chamber tests, the study confirms the reliability of the NTH method in estimating the effective internal friction angle under normally consolidated conditions while also identifying its limitations. These research findings offer data support for the in situ rapid and accurate estimation of design parameters, like the internal friction angle and undrained shear strength of the silty clay in the Yellow River Delta. Moreover, they provide insights for obtaining other crucial in situ data. Full article
(This article belongs to the Special Issue State of the Art of Rock Mechanics and Geotechnical Engineering)
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20 pages, 13252 KiB  
Article
The Failure Law and Combined Support Technology of Roadways with Weak Surrounding Rock in Deep Wells
by Xiangjun Wang, Jinzhou Tang, Yingming Li and Qiang Fu
Appl. Sci. 2023, 13(17), 9738; https://doi.org/10.3390/app13179738 - 28 Aug 2023
Cited by 1 | Viewed by 646
Abstract
In order to effectively address stability control technology issues of soft surrounding rock roadways in deep mines. This study analyses the deformation and failure characteristics of the surrounding rock of a −962 m horizontal track roadway with original support conditions based on a [...] Read more.
In order to effectively address stability control technology issues of soft surrounding rock roadways in deep mines. This study analyses the deformation and failure characteristics of the surrounding rock of a −962 m horizontal track roadway with original support conditions based on a severe deformation case that occurred in a mine. Upon establishing a mechanical model of surrounding rock failure zoning for circular roadways, which is based on the relationship between the stress–strain curve of soft rocks and the secondary stress distribution and strength of surrounding rock, this study explores the influence of rock strength indicators, disturbance degree, and support resistance on the stress distribution of the surrounding rock. The failure or instability mechanism of high-stress soft and weak surrounding rock is revealed on this basis. A multi-stage strengthening combined support technology is proposed, which consists of “high-strength prestressed anchor bolt (cable) supports as the core, deep and shallow hole groutings as the foundation, bottom angle, and floor anchorage grouting reinforcements as the key.” Moreover, numerical simulation and engineering practice optimize and verify the support scheme. The results show that after adopting the multi-stage strengthening combined support technology, the deformation of the surrounding rock of the roadways was only 12.6~14.3% of that under the original supporting parameters, and the deformation rate was still less than 0.2 mm/d even after 40 days. The proposed surrounding rock support method realizes the stability control of the roadway, which also has specific reference significance for similar projects. Full article
(This article belongs to the Special Issue State of the Art of Rock Mechanics and Geotechnical Engineering)
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