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Advances in Tunnelling and Underground Space Technology
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Advances in Tunnelling and Underground Space Technology

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

Deadline for manuscript submissions: 25 February 2025 | Viewed by 5632

Special Issue Editors

Dr. Haizuo Zhou

E-Mail Website
Guest Editor
School of Civil Engineering, Tianjin University, Tianjin 300072, China
Interests: soil–structure interaction; excavation; ground improvement
Special Issues, Collections and Topics in MDPI journals
Dr. Xiaoxuan Yu

E-Mail Website
Guest Editor
School of Civil Engineering, Tianjin University, Tianjin 300072, China
Interests: stability analysis of column-supported embankment; reliability analysis; interaction between pile and soil

Special Issue Information

Dear Colleagues,

Welcome to the Special Issue of "Advances in Tunnelling and Underground Space Technology". This collection of articles aims to showcase the latest advancements, innovations, and research in the field of tunnelling and underground space technology.

Tunnelling and underground space development have become increasingly important in modern society due to the growing need for efficient transportation systems, sustainable infrastructure, and optimized land use. The construction of tunnels and underground structures plays a crucial role in addressing these challenges and meeting the demands of urbanization and population growth.

This Special Issue collates a diverse range of contributions from leading experts, researchers, and practitioners in the field. The articles cover a wide spectrum of topics, including tunnel design and construction methodologies, geotechnical investigations, excavation techniques, ground support systems, monitoring and instrumentation, safety and risk management, and sustainable underground space utilization.

The papers presented in this Special Issue highlight the cutting-edge technologies, methodologies, and best practices that are shaping the future of tunnelling and underground space technology. They provide valuable insights into the challenges faced by engineers and researchers and offer innovative solutions to overcome them.

Dr. Haizuo Zhou
Dr. Xiaoxuan Yu
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.

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Published Papers (6 papers)

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Research

16 pages, 3587 KiB  
Article
Deterministic and Probabilistic Assessment of Failure Mechanisms in Geosynthetic-Reinforced Embankments
by Shen Zhang, Lifang Pai, Rongxue Yue, Yuang Shan, Renjie You, Yaqing Ma and Xiaojuan He
Appl. Sci. 2024, 14(18), 8106; https://doi.org/10.3390/app14188106 - 10 Sep 2024
Viewed by 504
Abstract
Geosynthetic-reinforced embankments are subject to two primary failure mechanisms: bond failure and rupture. Bond failure occurs when the critical slip surface extends beyond the reinforced zone, while rupture occurs when the slip surface intersects the reinforcement. For a specified factor of safety and [...] Read more.
Geosynthetic-reinforced embankments are subject to two primary failure mechanisms: bond failure and rupture. Bond failure occurs when the critical slip surface extends beyond the reinforced zone, while rupture occurs when the slip surface intersects the reinforcement. For a specified factor of safety and reinforcement length, there exists a minimum tensile strength of the reinforcement required to ensure bond failure only. Increasing the tensile strength beyond this minimum does not alter the failure mechanism or the factor of safety. Conversely, extending the reinforcement length while keeping the tensile strength below this critical value may lead to rupture failure at the same factor of safety. This study utilizes Monte Carlo simulation to perform a probabilistic stability analysis of these failure mechanisms in embankments with varying soil types and slope angles. The analysis evaluates safety margins in terms of the factor of safety and probability of failure. Furthermore, this study investigates the impact of cross-correlation between soil strength parameters, demonstrating that realistic values of the correlation coefficient can reduce the probability of failure for both failure mechanisms. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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15 pages, 3422 KiB  
Article
Model Modification of the Soil–Water Characteristic Curve of Unsaturated Weak Expansive Soil
by Lina Ma, Jinran Guo, Dongfang Liang, Xiaogang Ding and Yanjin Xue
Appl. Sci. 2024, 14(17), 7498; https://doi.org/10.3390/app14177498 - 24 Aug 2024
Viewed by 777
Abstract
This study evaluates the impact of compaction on the soil–water characteristic curve of unsaturated remodeled weakly expansive soils by assessing changes in soil pore structure resulting from variations in compaction. The remodeled weakly expansive soil in the Xinjiang Hami area is taken as [...] Read more.
This study evaluates the impact of compaction on the soil–water characteristic curve of unsaturated remodeled weakly expansive soils by assessing changes in soil pore structure resulting from variations in compaction. The remodeled weakly expansive soil in the Xinjiang Hami area is taken as the research subject to investigate how compaction affects microscopic pore structure using mercury intrusion testing. Subsequently, mercury intrusion porosimetry is employed to examine pore structure and distribution patterns at different dry densities. Based on the capillary principle and experimental methods (filter paper method and pressure plate method test), modified soil–water characteristic curves are obtained by fitting them with a three-parameter model law. The results indicate that higher dry density leads to an increased air intake value and significantly reduces the total volume of large pores within samples. Both the Fredlund and Xing model and the three-parameter model effectively capture the influence of initial dry density on the development pattern of the soil–water characteristic curve. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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18 pages, 9538 KiB  
Article
Ultimate Support Pressure Determination for Shield Tunnel Faces in Saturated Strata Based on Seepage Flow Control
by Ziwei Hu, Mingfeng Lei, Hu Zhang, Chaojun Jia and Chenghua Shi
Appl. Sci. 2024, 14(15), 6781; https://doi.org/10.3390/app14156781 - 3 Aug 2024
Viewed by 594
Abstract
Existing methods for calculating the ultimate support pressure of tunnel faces do not consider the control of seepage flow. Therefore, a model for calculating the ultimate support pressure under seepage conditions was established based on a two-dimensional water head distribution model and the [...] Read more.
Existing methods for calculating the ultimate support pressure of tunnel faces do not consider the control of seepage flow. Therefore, a model for calculating the ultimate support pressure under seepage conditions was established based on a two-dimensional water head distribution model and the upper bound theorem of limit analysis. The reliability of this method was verified through comparisons with other studies. Subsequently, the influence of water level and tunnel face water pressure coefficient on stability was analyzed. The results indicate that the ultimate support pressure is linearly positively correlated with the water level and tunnel face water pressure coefficient; as the water level increases and the water pressure coefficient decreases, the failure area extends and enlarges. Finally, an existing seepage flow calculation formula was introduced, and a method for calculating the ultimate support pressure based on seepage control was proposed. The appropriate tunnel face water pressure coefficient is determined through the seepage flow calculation formula, and the corresponding ultimate support pressure is then calculated. The results demonstrate that this method can provide better theoretical guidance for seepage control in tunnel faces in practical engineering. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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14 pages, 5390 KiB  
Article
Experimental Study on Preparation and Characteristics of Concrete Modified by Construction Waste
by Jing Zhang, Xuejun Zhu, Mingyuan Zhou and Xianwen Huang
Appl. Sci. 2024, 14(5), 1974; https://doi.org/10.3390/app14051974 - 28 Feb 2024
Viewed by 760
Abstract
With the advancement of urbanization construction, the proportion of construction waste to the total urban waste continues to increase, especially waste concrete. The treatment and reuse of waste concrete is a major trend that poses enormous pressure on environmental protection. This article focuses [...] Read more.
With the advancement of urbanization construction, the proportion of construction waste to the total urban waste continues to increase, especially waste concrete. The treatment and reuse of waste concrete is a major trend that poses enormous pressure on environmental protection. This article focuses on the problems in the preparation of recycled aggregates from waste concrete, which has important practical value. This article presents a new type of recycled concrete prepared through surface modification of recycled coarse aggregate and design experiments to change the replacement rate of coarse aggregate. The physical properties of recycled coarse aggregate, workability of fresh concrete, and mechanical properties of recycled concrete are analyzed. The research results indicate the following: (1) Through surface modification, recycled concrete can improve the workability of fresh concrete at a fixed water cement ratio, which can meet the requirements of mixing, transportation, and pouring of fresh concrete. (2) By modifying the surface of recycled aggregates, the strong water absorption performance of recycled aggregates caused by old mortar and surface defects has been reduced. And the modification effect of recycled aggregate improves the hydration process of recycled concrete, making the surface structure dense and further enhancing the strength of recycled concrete. (3) The compressive strength of recycled concrete specifications from construction waste shows a decreasing trend with the increase in coat aggregate replacement rate. The final ratio is as follows: modular dose of 12%, modification time of 90 min, and 20% recycled aggregate content. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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16 pages, 11415 KiB  
Article
Research on Lateral Deformation Control Criteria of Metro Shield Tunnels with Excessive Ellipticity
by Shaode Kan, Junsheng Chen, Yuehua Liang, Yizhao Wang and Huanyang Zhou
Appl. Sci. 2023, 13(23), 12721; https://doi.org/10.3390/app132312721 - 27 Nov 2023
Viewed by 901
Abstract
In recent years, excessive lateral deformation of subway shield tunnels has been observed due to adjacent engineering activities. This study examines the monitoring of excessive lateral deformation of the shield tunnel and the special steel plate reinforcement process to enhance the safety and [...] Read more.
In recent years, excessive lateral deformation of subway shield tunnels has been observed due to adjacent engineering activities. This study examines the monitoring of excessive lateral deformation of the shield tunnel and the special steel plate reinforcement process to enhance the safety and stability of the operating subway tunnel structure. It uses a three-dimensional refined finite-element model of the shield tunnel for parametric structural loading simulation analysis to propose a structural deformation limit value suitable for the subway shield tunnel. This study’s findings indicated the following: (1) as observed from the engineering examples, a tunnel with significant elliptical deformation increases the likelihood of cracking and other structural issues in the adjacent subway shield tunnel segment; (2) as observed from the post-reinforcement monitoring data, the steel plate reinforcement method effectively enhances the load-bearing stability of the damaged tunnel structure; (3) based on the finite-element simulation results and the comprehensive review of practical conditions, the standard warning value for lateral deformation, using ellipticity evaluation of the subway shield tunnel, is established at 20‰, with a control value of 25‰. The outcomes of this research offer valuable insights into the operation, maintenance, and health monitoring of subway shield tunnels. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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17 pages, 8278 KiB  
Article
Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction
by Rafael Rodríguez, Valentín Fernández, Marc Bascompta and Hector Garcia-Gonzalez
Appl. Sci. 2023, 13(19), 10998; https://doi.org/10.3390/app131910998 - 6 Oct 2023
Viewed by 1279
Abstract
The definition of a rock mass’s characteristics is crucial in underground construction to avoid delays and cost overruns. This study proposes a system to quantify the economic uncertainty related to a lack of knowledge of a rock mass in the tunnel construction stage, [...] Read more.
The definition of a rock mass’s characteristics is crucial in underground construction to avoid delays and cost overruns. This study proposes a system to quantify the economic uncertainty related to a lack of knowledge of a rock mass in the tunnel construction stage, either for tunnel boring machines or for drill and blast excavation techniques. Using a back-analysis of three actual tunnels completed in Spain (Burata, Lot 3 of the Pajares variant, and Bolaños), the study assessed the directional core drilling technique (DCD) for this purpose, comparing it with conventional boreholes. In this regard, the DCD approach reduced the uncertainty by between EUR 6.7 and EUR 12.7 for every EUR 1, while the total cost of the drilling campaign remained within a widely accepted proportion of the construction budget. Overall, the uncertainty was reduced by approximately EUR 6000 per meter of the tunnel. Full article
(This article belongs to the Special Issue Advances in Tunnelling and Underground Space Technology)
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