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Applied Sciences
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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: 20 July 2024 | Viewed by 2074

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.

Published Papers (3 papers)

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Research

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 372
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 568
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 - 06 Oct 2023
Viewed by 832
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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