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Water
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Research Advances in Hydraulic Structure and Geotechnical Engineering
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Research Advances in Hydraulic Structure and Geotechnical Engineering

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Soil and Water".

Deadline for manuscript submissions: 20 May 2024 | Viewed by 3692

Special Issue Editors

Dr. Xiang Yu

E-Mail Website
Guest Editor
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou, China
Interests: dam engineering; overburden foundation, dynamic response; damage of concrete diaphragm structure; liquefaction and stability analysis; numerical analysis method; refined analysis method
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yuke Wang

E-Mail Website
Guest Editor
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou, China
Interests: soil mechanics and constitutive theory; subgrade; geotechnical engineering; non-destructive repair technology; geotechnical test; numerical method; shield tunnel; reliability analysis; slope engineering
Dr. Yongqian Qu

E-Mail Website
Guest Editor
School of Water Conservancy and Transportation, Dalian University of Technology, Dalian, China
Interests: rockfill dam engineering; dynamic analysis; soil-structure interaction; multi-numerical analysis method; discontinuous deformation analysis; damage and failure of anti-seepage structure; overburden foundation

Special Issue Information

Dear Colleagues,

With the increasing global demand for energy, water energy resources have been widely promoted as a clean energy source. In order to meet the needs of water energy resource development, hydraulic engineering has rapidly developed and plays an important role in regulating water resources and flood control by controlling river water levels and flow rates to achieve these objectives. However, hydraulic engineering faces various challenges in terms of design, construction, and operation due to complex geographical conditions. For example, under strong seismic conditions, soil liquefaction is prone to occur, leading to foundation settlement and dam slope instability, while other hydraulic structures may also suffer damage. Due to the extensive and crucial role of hydraulic engineering, the evaluation of its structural safety performance is particularly important. This Special Issue of the journal Water will focus on research related to the safety of hydraulic structures, aiming to advance the development and regulation of water resources. The Special Issue’s topics include, but are not limited to, seismic response analysis of hydraulic structures, research on the seismic performance of hydraulic structures, studies on earthquake input methods, and refined analyses.

We believe these subjects will be very useful for the further development of water power resources.

Dr. Xiang Yu
Prof. Dr. Yuke Wang
Dr. Yongqian Qu
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. Water 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 2600 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

  • hydraulic structure
  • geotechnical engineering
  • safety evaluation
  • numerical simulation
  • fine analysis
  • dynamic response
  • soft foundation
  • mechanical characteristics
  • damage behavior
  • treatment measure

Published Papers (4 papers)

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Research

14 pages, 1897 KiB  
Article
Research on Permeability Characteristics and Gradation of Rockfill Material Based on Machine Learning
by Qigui Yang, Jianqing Zhang, Xing Dai, Zhigang Ye, Chenglong Wang and Shuyang Lu
Water 2024, 16(8), 1135; https://doi.org/10.3390/w16081135 - 16 Apr 2024
Viewed by 518
Abstract
The density of rockfill material is an important index to evaluate the quality of rockfill dams. It is of great significance to accurately obtain the densities and permeability coefficients of rockfill material dams quickly and accurately by scientific means. However, it takes a [...] Read more.
The density of rockfill material is an important index to evaluate the quality of rockfill dams. It is of great significance to accurately obtain the densities and permeability coefficients of rockfill material dams quickly and accurately by scientific means. However, it takes a long time to measure the permeability coefficient of rockfill material in practice, which means that such measurements cannot fully reflect all the relevant properties. In this paper, using a convolutional neural network (CNN), a machine learning model was established to predict the permeability coefficient of rockfill material with the full scale (d10~d100), pore ratio, Cu, and Cc as the inputs and the permeability coefficient as the output. Through collecting the permeability coefficient and related data in the literature, the set samples were sorted for model training. The prediction results of the trained CNN model are compared with those of the back propagation (BP) model to verify the accuracy of the CNN model. Laboratory constant head penetration experiments were designed to verify the generalization performance of the model. The results show that compared with the BP model, the CNN model has better applicability to the prediction of the permeability coefficient of rockfill material and that the CNN can obtain better accuracy and meet the requirements of the rough estimation of rockfill materials’ permeability in engineering. Full article
(This article belongs to the Special Issue Research Advances in Hydraulic Structure and Geotechnical Engineering)
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13 pages, 3987 KiB  
Article
Comparison of Load Transfer Law of Pipe Pile between O-Cell Test and Traditional Static Load Test
by Xiaodong Xu, Peining Zhu, Yaya Song, Weijie Chen, Lin Chen, Jia Weng, Teng Xu and Yuke Wang
Water 2024, 16(6), 826; https://doi.org/10.3390/w16060826 - 12 Mar 2024
Viewed by 651
Abstract
In recent years, the detection of offshore pile foundations has received wide attention in engineering. Compared with traditional methods, the O-cell test has unique advantages in offshore pile foundation detection. To study the load transfer characteristics of the O-cell method for pile testing [...] Read more.
In recent years, the detection of offshore pile foundations has received wide attention in engineering. Compared with traditional methods, the O-cell test has unique advantages in offshore pile foundation detection. To study the load transfer characteristics of the O-cell method for pile testing in coastal soft soil foundation, this paper established the pile–soil numerical model to simulate the O-cell and traditional testing processes. The finite element method and equal displacement method are combined to calculate the conversion coefficient and ultimate bearing capacity, and the distribution forms of axial force, side friction resistance, and tip resistance are discussed. The research results show that the O-cell test method and the traditional method have different load transfer forms. By introducing the equal displacement method into the O-cell pile–soil model, the error between the equivalent conversion ultimate bearing capacity and the calculation result of the surcharge method is less than 0.5%, and the O-cell conversion coefficient can be accurately calculated. Full article
(This article belongs to the Special Issue Research Advances in Hydraulic Structure and Geotechnical Engineering)
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17 pages, 5377 KiB  
Article
Study on Impoundment Deformation Characteristics and Crack of High Core Rockfill Dam Based on Inversion Parameters
by Litan Pan, Bo Wu, Daquan Wang, Xiongxiong Zhou, Lijie Wang and Yi Zhang
Water 2024, 16(1), 188; https://doi.org/10.3390/w16010188 - 04 Jan 2024
Viewed by 966
Abstract
In the numerical simulation of earth-rock dam, accurate and reliable mechanical parameters of the dam material are the important basis for dam deformation predictions and dam safety evaluations. Based on the deformation monitoring data of Luding core wall rockfill dam, the rheological parameters [...] Read more.
In the numerical simulation of earth-rock dam, accurate and reliable mechanical parameters of the dam material are the important basis for dam deformation predictions and dam safety evaluations. Based on the deformation monitoring data of Luding core wall rockfill dam, the rheological parameters of rockfill and core wall materials are inverted in this paper. Combined with the actual filling and impoundment process of the dam, the numerical simulation is carried out, and the stress deformation and differential settlement of the dam after completion and impoundment are analyzed. The results showed that the stress deformation results of the dam based on the inversion parameters were in good agreement with the actual deformation. The horizontal displacement, settlement, and principal stress of the dam during the completion period were symmetrically distributed along the core wall. The maximum horizontal displacement occurred at the main dam on both sides of the core wall and the upstream and downstream dam slopes, and the maximum settlement occurred in the middle of the core wall. During the impoundment period, under the action of reservoir water pressure and upstream rockfill wetting deformation, the deformation and stress of the dam body no longer met the symmetrical distribution law, and the maximum horizontal displacement of the dam body during the impoundment period was located at 2/3 of the upstream dam slope. The maximum settlement of the dam body was located at 1/2 of the dam height. The maximum principal stress on the upstream side of the core wall was located on the left side of the bottom of the core wall, and the minimum principal stress was also located on the left side of the bottom of the core wall. The simulation results of the deformation and stress met the general law of earth-rock dam engineering. During the completion period, the deformation inclination of the dam crest was less than 1%. During the impoundment period, the deformation inclination of the dam crest area increased due to the wetting deformation of the upstream rockfill material. At the same time, the deformation inclination of the dam crest axis was larger than that of the upstream and downstream sides, and the deformation inclination of the dam crest at the middle of the valley was the largest, but it did not exceed 3%, that is, there would be no longitudinal cracks, which is consistent with the actual situation. The research results can better predict the stress deformation and crack of the dam body, and provide important support for dam safety evaluations. Full article
(This article belongs to the Special Issue Research Advances in Hydraulic Structure and Geotechnical Engineering)
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15 pages, 4583 KiB  
Article
Stress Path Efforts on Palm Fiber Reinforcement of Clay in Geotechnical Engineering
by Xue-Yan Liu, Yu Ye, Ke Li and Yun-Qi Wang
Water 2023, 15(23), 4053; https://doi.org/10.3390/w15234053 - 22 Nov 2023
Viewed by 876
Abstract
Sixteen Reduced Triaxial Compression (RTC) triaxial tests were conducted to investigate the reinforcement effect of fibered clay in this paper. Palm fiber with four different fiber lengths (5 mm, 10 mm, 15 mm, and 20 mm) and four different fiber contents (0.3%, 0.5%, [...] Read more.
Sixteen Reduced Triaxial Compression (RTC) triaxial tests were conducted to investigate the reinforcement effect of fibered clay in this paper. Palm fiber with four different fiber lengths (5 mm, 10 mm, 15 mm, and 20 mm) and four different fiber contents (0.3%, 0.5%, 0.7%, and 0.9% in mass) were utilized. Accordingly, three additional groups of triaxial tests were performed to analyze the stress path effects with four different stress paths, including RTC, Conventional Triaxial Compression (CTC), Reduced Triaxial Extension (RTE), and isotropic Triaxial Compression (TC). Three samples were tested, including fibered clay with a fiber length of 10 mm and a fiber content of 0.7% (referred to as 10 mm 0.7%), fibered clay with a fiber length of 20 mm and a fiber content of 0.5% (referred to as 20 mm 0.5%), and bare clay, which was used to reveal the fiber reinforcement of clay. All samples were tested under consolidated undrained conditions. The test results showed that in RTC conditions, the deviator stress increased to a greater extent with 0.3% mass content of fibers according to the same higher confining pressures of bare clay. Fibers primarily increased the cohesion of fibered clay, a shear strength parameter, in terms of total stress, whereas they also increased the friction angle of fibered clay in terms of effective stress. For short fibers, the coefficient of strength reinforcement of the fibered clay increased with fiber content. However, for long fibers, this reinforcement may lead to a weakening of the clay’s strength, as the long fibers may cluster or weaken along their longitude. Among the four stress paths (CTC, TC, RTC, and RTE) examined, the reinforcement took effort mainly in the CTC condition. In contrast, in unloading conditions, the fibers had little contribution to reinforcement. Consequently, in unloading conditions, such as deep excavating and slope cutting, the stress path should be considered to obtain a reliable parameter for geotechnical engineering applications. Full article
(This article belongs to the Special Issue Research Advances in Hydraulic Structure and Geotechnical Engineering)
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