Environmental Impact and Control of Geotechnical Engineering Construction

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

Deadline for manuscript submissions: 30 September 2024 | Viewed by 5828

Special Issue Editors


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Guest Editor
School of Civil Engineering, Tianjin University, Tianjin 300072, China
Interests: soil–structure interaction; numerical calculation of geotechnical engineering

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Guest Editor Assistant
School of Civil Engineering, Tianjin University, Tianjin 300072, China
Interests: environmentally-friendly construction of urban underground space; offshore wind turbine foundation; mobilisable strength design and digital twin technology in underground construction

Special Issue Information

Dear Colleagues,

The improvement of both design methods and construction technologies is driving progress in geotechnical engineering. This poses new challenges in research on the effect of underground construction on complicated surroundings as well as corresponding control solutions. Therefore, this Special Issue is intended for the presentation of new ideas and research results in the field of effect reduction of geotechnical engineering construction from design methodology, construction technique, and theory to its practical use.

Areas relevant to the effect of underground construction and corresponding control solution include, but are not limited to, novel design methods and applications, large-scale physical modelling techniques, the latest numerical modelling methodologies, high-precision monitoring technologies in the test and field, artificial intelligence, machine learning, deep learning, and digital twin in geotechnical engineering. The role of geotechnical construction for mobility, quality of life, and urban development are also topics of interest.

Dr. Yu Diao
Guest Editor
Dr. Chuhan Deng
Guest Editor Assistant

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Published Papers (6 papers)

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Research

23 pages, 8731 KiB  
Article
Numerical Analysis of the Overtopping Failure of the Tailings Dam Model Based on Inception Similarity Optimization
by Deli Qiu, Jiangdong Xu and Hai Lin
Appl. Sci. 2024, 14(3), 990; https://doi.org/10.3390/app14030990 - 24 Jan 2024
Viewed by 578
Abstract
The analysis of overtopping dam break caused by extreme rainstorms and other special circumstances is very important in the feasibility analysis of new construction or expansion projects of tailings reservoirs. Reduced-scale physical model tests can directly reflect the topography and dam-break influence range, [...] Read more.
The analysis of overtopping dam break caused by extreme rainstorms and other special circumstances is very important in the feasibility analysis of new construction or expansion projects of tailings reservoirs. Reduced-scale physical model tests can directly reflect the topography and dam-break influence range, but the reasonable selection of model dam material is the key to ensure the model’s similarity. Based on the similarity optimization of the limit state of scour inception of sediment particles, a new method for the model material of tailings dams can be proposed, but it needs to be verified by a similar overtopping model test. In this paper, the modeling and numerical calculation analysis of a prototype tailings dam and a similar reduced-scale model are carried out by using FLOW-3D v11.2 numerical software. The calculation results show that the model test scheme optimized by inception similarity can well reproduce the overtopping failure process of the prototype dam. Full article
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16 pages, 4802 KiB  
Article
Centrifuge Modelling of the Impact of Excavation with Partition Piles on Adjacent Existing Tunnel
by Yiming Du, Bingyi Wang, Yu Diao, Haotian Zhao, Xiangyu Zhao and Yiming Su
Appl. Sci. 2023, 13(24), 13064; https://doi.org/10.3390/app132413064 - 07 Dec 2023
Viewed by 571
Abstract
Recently, due to more excavation projects near existing tunnels, the research on tunnel deformation control has become very important and urgent. However, the systematic study of the control effectiveness of partition piles, one of the commonly used methods for controlling tunnel deformation, was [...] Read more.
Recently, due to more excavation projects near existing tunnels, the research on tunnel deformation control has become very important and urgent. However, the systematic study of the control effectiveness of partition piles, one of the commonly used methods for controlling tunnel deformation, was not mature yet. In response to this situation, a series of centrifuge modelling studies were performed to explore how nearby existing tunnels respond to excavations with partition piles in a dry sand foundation. The tests provided insights into the variations of the horizontal displacement of retaining walls, surface settlement, the horizontal and vertical displacements of the tunnel, and the circular induced strain of the tunnel. The test results showed that the horizontal displacement of retaining walls exhibited a cantilever-type displacement pattern. The most significant surface settlement occurred near the retaining wall and decreased as the distance from the retaining wall increased. The overall deformation of the tunnel roughly showed an ellipsoidal deformation pattern in the horizontal direction. The maximum horizontal displacement was observed at the right shoulder of the tunnel, while the maximum vertical displacement occurred at the right arch of the tunnel. Increasing the length of the partition piles led to a deterioration in their deformation control effectiveness. The top burial depth of the pile could further improve the control effectiveness of the partition piles. However, when the top burial depth of the pile was excessive and exceeded its critical value, the improvement effect of the burial depth on the partition piles diminished. Full article
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21 pages, 8310 KiB  
Article
Stability Analysis and Safety Factors of the Excavation Face of a Pipe Screen Tunnel in a Soft Soil Area
by Weiqiang Pan, Zihe Wang, Yu Diao, Gang Zheng, Haizuo Zhou and Tianqi Zhang
Appl. Sci. 2023, 13(20), 11120; https://doi.org/10.3390/app132011120 - 10 Oct 2023
Viewed by 916
Abstract
With the rapid development of urban rail transit and underground space construction, the advantages of the concealed excavation method are gradually highlighted in the urban center area affected by a complex engineering environment. At present, the pipe curtain method with a flexible section [...] Read more.
With the rapid development of urban rail transit and underground space construction, the advantages of the concealed excavation method are gradually highlighted in the urban center area affected by a complex engineering environment. At present, the pipe curtain method with a flexible section and wide application of the soil layer is being widely used in engineering, but the research on the stability of the excavation face during the construction of the pipe curtain method in soft soil areas still has not formed a complete system. Therefore, this paper analyzes the stability of the excavation face under different reinforcement conditions and the influence of different spacing, numbers, and strength of MJS (metro jet system) zones on the stability of the excavation face of the pipe curtain method based on the actual project of the Guiqiao Road Station of the Shanghai Metro, China, and gives a reference for the reinforcement of the palm face in the excavation process of the pipe curtain method in soft soil areas. The study shows that the safety coefficient of the excavation face decreases with the increase in the slope angle of the excavation face, with the increase in spacing of the MJS zone, and with the increase in height of the MJS zone arrangement, while the safety coefficient of the excavation face increases with the increase in strength of the MJS zones themselves and the increase in the strength of the soil between the MJS zones. Further, the machine learning model is applied to predict the stability of the excavation face under different cases, and the relevant fitting accuracy is above 0.9, which can predict the stability of the excavation better. Full article
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17 pages, 8166 KiB  
Article
Limit Equilibrium Analysis of Landfill Instability Based on Actual Failure Surface
by Junchao Li, Ruiqi Chen and Haoyu Lin
Appl. Sci. 2023, 13(18), 10498; https://doi.org/10.3390/app131810498 - 20 Sep 2023
Viewed by 659
Abstract
Slope stability is one of the key engineering problems in the whole lifetime of landfills. In this paper, combined with the wedge limit equilibrium analysis, a landfill stability analysis method based on the actual failure surface is proposed, and the model is verified [...] Read more.
Slope stability is one of the key engineering problems in the whole lifetime of landfills. In this paper, combined with the wedge limit equilibrium analysis, a landfill stability analysis method based on the actual failure surface is proposed, and the model is verified according to the data of centrifuge model tests. It is found that this method can more accurately calculate the factor of safety (FS) of the slope of the landfill and evaluate the stability of the slope. Finally, sensitivity analysis was conducted to evaluate the effects of the actual failure surface angle, water level, soil parameters, and the presence or absence of a dam on the factor of safety. Full article
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17 pages, 8219 KiB  
Article
Field Testing and Numerical Simulation of the Effectiveness of Trench Isolation for Reducing Vibration Due to Dynamic Compaction
by Yonglai Zheng, Xin Lan, Tanbo Pan, Dingding Cui, Guangxin Li, Longyin Shen and Xubing Xu
Appl. Sci. 2023, 13(17), 9744; https://doi.org/10.3390/app13179744 - 28 Aug 2023
Viewed by 902
Abstract
Dynamic compaction is a widely used method to strengthen the foundation, which can cause significant impacts on surrounding structures, making vibration control measures necessary. This study investigates the effectiveness of isolation trenches in reducing ground vibration caused by dynamic compaction in a typical [...] Read more.
Dynamic compaction is a widely used method to strengthen the foundation, which can cause significant impacts on surrounding structures, making vibration control measures necessary. This study investigates the effectiveness of isolation trenches in reducing ground vibration caused by dynamic compaction in a typical multi-layered alluvial soil foundation adjacent to the Yangtze River. A combination of field testing and numerical simulation was employed to evaluate the vibration isolation effect of trenches at different depths and locations. The results show that trenches have a significant vibration isolation effect on the side away from the tamping point, but they can have an amplifying effect between the trench and tamping point. The effectiveness of the isolation trenches increases with deeper trenches and distance from the tamping point, but the amplification effect decreases with increasing depth. Therefore, when employing trenches, reinforcement measures must be adopted, and a suitable trench depth should be selected. The closer the isolation trench to the dike, the better the protection will be. The study provides effective guidance for designing isolation trenches in similar dynamic compaction processes, emphasizing the importance of considering spatial attenuation characteristics and selecting appropriate trench depths and locations. Full article
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15 pages, 7716 KiB  
Article
Mechanical Properties of Sheet Pile Cofferdam during Adjacent Open Cut Tunnel Construction near Lake Bottom
by Chuang Kai and Jinming Xu
Appl. Sci. 2023, 13(10), 6191; https://doi.org/10.3390/app13106191 - 18 May 2023
Cited by 1 | Viewed by 1620
Abstract
In water-related projects, the application of steel sheet pile cofferdams is becoming more and more widespread, and the influence of tunnel construction on the mechanical properties of adjacent cofferdams is important. In this study, the object of research was the mechanical properties of [...] Read more.
In water-related projects, the application of steel sheet pile cofferdams is becoming more and more widespread, and the influence of tunnel construction on the mechanical properties of adjacent cofferdams is important. In this study, the object of research was the mechanical properties of large-span steel sheet pile cofferdams. The open-cut tunnel project was located in Suzhou Yinshan Lake, China. According to the actual construction steps of the tunnel foundation pit, assuming that the soil was a small strain hardening soil model, combined with on-site monitoring data, a three-dimensional elastoplastic finite difference model was established. The results show that during tunnel construction, the maximum settlement of the cofferdam appeared at 0.27~0.53 m on the side of the foundation pit; the maximum horizontal displacement of the steel sheet pile occurred at the pile bottom of foundation pit side, and the seepage gradually increased during construction, eventually resulting in water gushing at the bottom of the foundation pit. After the completion of tunnel construction, the settlement value of the cofferdam presented a pattern that first increased and then decreased from the side of the foundation pit to the side of the adjacent lakeside; the steel cofferdam tilted toward the side of the foundation pit, with a maximum inclination angle of 3.37°. It should be pointed out that as the construction progressed, the axial force of the tie rods in the steel cofferdam changed from a U-shaped distribution to a V-shaped distribution. This study could provide a reference for the impact of tunnel foundation pit construction on adjacent steel cofferdam and could also provide a reference for the safety research of open-cut tunnel construction. Full article
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