Article
Engineering, Geological
Ketan Arora, Marte Gutierrez
Summary: This study proposes a new visco-elastic-plastic solution for deep circular tunnels in soft rock and high field stress conditions. By comparing with experimental data, it is found that the proposed solution accurately predicts tunnel wall displacement and reflects the time-dependent behavior of the tunnels.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Alexandros N. Nordas, Matteo Natale, Thomas Leone, Georgios Anagnostou
Summary: Shield jamming is a significant hazard in mechanized tunnelling under squeezing conditions. This occurs in narrow fault zones between competent rock layers, where the wall effect reduces deformations and rock pressures, making shield jamming less likely. This paper proposes two new thrust force estimation methods that consider the favorable influence of the wall effect in narrow fault zones, providing a valuable tool for design.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Ashwani Jain, K. S. Rao
Summary: The Himalaya region has complex and weak geology, resulting in high fragility and instability. This study developed three-dimensional empirical correlations using regression analysis to predict tunnel deformation. The proposed correlations were compared with existing ones and showed improvement in accuracy.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Construction & Building Technology
Yingbin Liu, Shaoming Liao, Lisheng Chen, Mengbo Liu
Summary: This study investigates the structural responses of DOT tunnels when crossed by shield tunnels. The results show that shield crossings induce both vertical and torsional deformations in the DOT tunnel, with a typical hump distribution after the tunnel under-crossing. The superimposed effect of twin-tunneling under-crossing is significant, with reduced net uplift deformation and uneven longitudinal section-torsion. Tail grouting effectively reduces settlement but increases torsional deformation of the tunnel.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Geological
Ketan Arora, Marte Gutierrez, Ahmadreza Hedayat, Erick Christian Cruz
Summary: This study focused on improving the understanding of tunnel squeezing through a physical model test simulating tunnel boring machine excavation in squeezing clay-rich rocks. Experiments were conducted at realistic in-situ stress levels to study time-dependent tunnel convergence in three dimensions.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Geological
Ketan Arora, Marte Gutierrez, Ahmadreza Hedayat
Summary: The design of support systems for tunnels in squeezing ground conditions is a challenging task. This study develops a novel experimental setup using a physical model to simulate the tunnel excavation and support installation process in clay-rich rocks. The interaction between the support and the squeezing ground is observed to gain better understanding. The study proposes a time-dependent longitudinal displacement profile model for the supported tunnel and provides recommendations for optimizing the support requirement in squeezing ground conditions.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Civil
Isam Shahrour, Wengang Zhang
Summary: The application of soft computing techniques in TBM tunneling has achieved significant progress in optimizing solutions and reducing costs. Engineers face challenges in selecting the appropriate technique, but recommendations like preliminary analysis, data completion, selection of hidden layers and nodes, use of recurrent neural networks, and hybrid optimization techniques can help overcome these challenges and improve efficiency.
Article
Construction & Building Technology
Binbin Zhu, Peng Zhang, Mingfeng Lei, Lichuan Wang, Lun Gong, Chenjie Gong, Fudong Chen
Summary: This paper presents an improved analytical solution for predicting ground movements using ground loss correction. The solution is validated using field measurements and it is shown that in addition to grouting quality and timing, the vertical translation should also be strictly controlled to minimize ground deformation.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Ye Lu, Yong Tan, Bo Yang, Wan-Lei Chen
Summary: This study explored the failure mechanism of ground subsidence caused by removing large isolated boulder in the sand matrix during tunneling and its impact on tunnel performance using numerical modeling. The research found that removing the boulder initially maintained stability of the soil stratum above the cavity, but over time led to subsidence or cave-in of the ground surface. Furthermore, the removal of the boulder also affected the mechanical properties of the tunnel lining.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2021)
Article
Engineering, Geological
Dalong Jin, Yannick Choy Hing Ng, Bingyu Han, Dajun Yuan
Summary: This study investigates the slurry-induced hydraulic fracturing in shield tunneling and develops a model for fracture initiation and propagation. The results show that fractures can easily extend to the ground surface in weak soil or shallow geological conditions, but can be mitigated by using high-density slurry.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Multidisciplinary Sciences
Dipaloke Majumder, M. N. Viladkar, Mahendra Singh
Summary: A novel numerical paradigm (Three Analysis Method) is proposed for finite element analysis of tunnels excavated in squeezing ground. The elastic-plastic behavior of the rock mass and the interaction between tunnel support structure and rock mass are considered in this study. The framework is applied to a case study of a hydro-electric project in India, and the tunnel convergence, stress distribution, ground-reaction behavior, and support characteristic are quantified.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Lei-Lei Nian, Tao Wang, Jing-Tao Lu
Summary: This study theoretically predicts that the emitted light from the plasmon mode in an STM single molecular junction can be squeezed with reduced quantum fluctuations under external laser drive. By selectively exciting energy levels, the squeezed plasmon can exhibit sub-or superPoissonian statistical properties. It is also demonstrated that the molecular excitonic mode can be squeezed simultaneously.
Article
Construction & Building Technology
Rongzhu Liang, Jin Wu, Lianwei Sun, Wen Shen, Wenbing Wu
Summary: The study analyzed the impact of a large-scale basement excavation on an adjacent metro station and shield tunnels, using zoned excavation and comprehensive monitoring measures.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Environmental Sciences
Rongzhu Liang, Cheng Kang, Liming Xiang, Zhongchao Li, Cungang Lin, Kun Gao, Yang Guo
Summary: The paper presents a simplified method to predict the response of in-service shield tunnels crossing over in soft ground, by calculating unloading loads from overcrossing tunnelling and solving tunnel deformation numerically. The proposed method is validated with two case histories showing good agreement between predicted tunnel heave and field measurements. The study also reveals that the tunnel heave is greater when a new tunnel crosses obliquely or parallelly over an existing tunnel, and that ground elastic modulus and tunnel diameter have significant effects on tunnel heave and ring dislocation.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Geological
Kursat Kilic, Hajime Ikeda, Tsuyoshi Adachi, Youhei Kawamura
Summary: This study proposed a method using machine learning techniques to identify tunnel lithology and address the issue of imbalanced tunneling data. The method analyzed the operational parameters of EPB-TBM to provide effective tunnel lithology identification results.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Remote Sensing
Fanis Moschas, Stathis Stiros
Article
Engineering, Mechanical
Fanis Moschas, Stathis Stiros
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
Article
Geosciences, Multidisciplinary
Stathis C. Stiros
ARABIAN JOURNAL OF GEOSCIENCES
(2020)
Article
Chemistry, Analytical
Yiannis Fradelos, Olga Thalla, Irene Biliani, Stathis Stiros
Article
Geochemistry & Geophysics
Ioannis Leivadas-Stathakopoulos, Irene Biliani, Stathis C. Stiros
Summary: This study investigates the stability of variable slip fault models (VSFM) to input geodetic measurements by analyzing statistically similar sets of synthetic ground displacements to obtain comparable VSFM. It was found that an increase in observational noise leads to higher variability in fault models.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Stathis C. Stiros
Summary: The ancient legend of the destruction of Helike and Boura in 373 B.C. by the god Poseidon is considered to be a punishment for a crime committed in his shrine. However, geological and archaeological studies suggest that this legend may have been later fabricated.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Construction & Building Technology
Stathis C. Stiros, F. Moschas, P. Triantafyllidis
Summary: GNSS technology is efficient for bridge structural monitoring and computing mode shapes. The study found that spectral peaks in deflections spectra may differ from the true value due to various excitation effects, requiring additional data to filter out excitation frequencies and measurement noise for reliable modal frequency estimation.
Article
Archaeology
Stathis C. Stiros
Summary: This article compares the geological content of Aristotle's Meteorology and the anonymous treatise De Mundo, and uses new geoarchaeological evidence to date De Mundo to the first century AD. It concludes that there is no evidence of changes in Aristotle's philosophical and geographical ideas at the end of his life. The study highlights the potential of geoarchaeological methods to provide new insights into various fields of research.
GEOARCHAEOLOGY-AN INTERNATIONAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Stathis C. Stiros
Summary: The 2020 Samos, M7.0 earthquake had an unusual distribution of damage, possibly related to historical earthquakes, with serious localized damage in the Izmir area impacting ancient structures’ safety.
TURKISH JOURNAL OF EARTH SCIENCES
(2021)
Article
Construction & Building Technology
Villy Kontogianni, Stathis C. Stiros
Article
Geochemistry & Geophysics
Stathis C. Stiros
JOURNAL OF SEISMOLOGY
(2020)
Proceedings Paper
Engineering, Civil
Garyfalia Konstantopoulou, Natalia Spanou, Vaia Kontogianni
ENGINEERING GEOLOGY FOR SOCIETY AND TERRITORY, VOL 8: PRESERVATION OF CULTURAL HERITAGE
(2015)
Article
Remote Sensing
George Papastamos, Stathis Stiros, Vasso Saltogianni, Villy Kontogianni
Article
Construction & Building Technology
Stathis C. Stiros
Summary: The development of modern geodetic satellite techniques allows for the observation of dynamic deflections of bridges, but there are challenges like unexplained cases and excessive deflections in stiff bridges. A strategy based on practical rules and structural constraints is needed to recognize and avoid bias in GNSS monitoring.
Article
Geochemistry & Geophysics
Ioannis Leivadas-Stathakopoulos, Irene Biliani, Stathis C. Stiros
Summary: This study investigates the sensitivity of variable slip fault models (VSFM) based on synthetic data, finding that an increase in observation noise leads to higher instability of fault models, particularly for slip. Using synthetic data to validate VSFM appears as a promising strategy.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Construction & Building Technology
Zhi Ding, Xiao Zhang, Shao-Heng He, Yong-Jie Qi, Cun-Gang Lin
Summary: This study investigates the longitudinal behavior of a shield tunnel by designing and constructing a reduced-size indoor model. The results show that the longitudinal settlement of the tunnel follows a normal distribution, with the maximum settlement occurring at the central ring and increasing linearly with the applied load. Stress concentration typically occurs on the side of the tunnel waist under surcharge, resulting in transverse elliptical deformation of the entire structure.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Lucia Lopez-de-Abajo, Marcos G. Alberti, Jaime C. Galvez
Summary: Assessing and predicting concrete damage is crucial for infrastructure management. This study quantifies gas concentrations in urban tunnels to achieve this goal.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Chao He, Yinghao Cai, Chenqiang Pu, Shunhua Zhou, Honggui Di, Xiaohui Zhang
Summary: This paper investigates the impact of river channel excavation on adjacent metro tunnels and proposes protective measures based on an engineering project in Fuzhou, China. A three-dimensional finite element model is developed to calculate the displacements and distortion of tunnels under different excavation sequences and soil reinforcement measures. Real-time monitoring confirms that the vertical displacements and diametrical distortion of tunnels are primarily caused by the excavation of the river above the tunnels, while horizontal displacements are induced by the excavation next to the tunnels. The study recommends a combination of cement slurry with a portal form and concrete with a plate form for soil reinforcement and tunnel protection.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Yaosheng Liu, Ang Li, Feng Dai, Ruochen Jiang, Yi Liu, Rui Chen
Summary: In this study, a hybrid model based on a multilayer perceptron (MLP) and meta-heuristic algorithms was developed to improve blast performance during tunnel excavation. Precise prediction of post-blasting indicators was important for optimization, and a comparison of meta-heuristic algorithms was conducted to find the most suitable model. The results showed that the developed model effectively reduces overbreak areas and quantitatively analyzes the influence of geological conditions.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Xiang Shen, Yifan Chen, Liqiang Cao, Xiangsheng Chen, Yanbin Fu, Chengyu Hong
Summary: In this paper, a machine learning-based method for predicting the slurry pressure in shield tunnel construction is proposed. By considering the influence of fault fracture zones and setting the formation influence coefficient, the accuracy of the prediction is significantly improved.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Shuying Wang, Zihao Zhou, Xiangcou Zheng, Jiazheng Zhong, Tengyue Zheng, Changhao Qi
Summary: A real-time assessment and monitoring approach based on laser scanning technology and point cloud data analysis was proposed to address the hysteresis in assessing the workability of conditioned soils and the inefficiency in estimating the soil volume flow rate in tunnelling practice. The approach was successfully applied in identifying the workability of conditioned soil and its discharge rate in the EPB shield tunnelling project.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Peng Jiang, Benchao Liu, Yuting Tang, Zhengyu Liu, Yonghao Pang
Summary: This study introduces a novel deep learning-based electrical method that jointly inverses resistivity and chargeability to estimate water-bearing structures and water volume. Compared with traditional linear inversion methods, the proposed method demonstrates superiority in locating and delineating anomalous bodies, reducing solution multiplicity.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Haoyu Mao, Nuwen Xu, Zhong Zhou, Chun Sha, Peiwei Xiao, Biao Li
Summary: The study focuses on the delineation of rock mass damage zones and stability analysis of underground powerhouse in Lianghekou hydropower station. ESG monitoring system is used to monitor the inner micro-fracture activity of surrounding rock mass in real-time. Engineering analogy method is adopted to forecast the deformation period of surrounding rock mass and analyze the variation characteristics of seismic source parameters. The research results provide references for similar deep underground excavation engineering in terms of design and construction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Junling Qiu, Dedi Liu, Kai Zhao, Jinxing Lai, Xiuling Wang, Zhichao Wang, Tong Liu
Summary: This study focuses on the construction surface cracks of large cross-section tunnels in loess strata of China. The mechanism of surface crack formation is analyzed, and factors such as settlement deformation, construction scheme, and surrounding soil environment are identified as the main contributors. Numerical simulations were conducted to gain a deeper understanding of the influence of factors on surface cracks in loess tunnel construction. Specific measures for prevention and treatment of construction surface cracks are proposed to provide new ideas for surface crack control in loess tunnels.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Shang, Jiaxin Lu, Ying Luo, Song Wang, Zhengyu He, Aobo Wang
Summary: The study reveals significant variations in car-following behavior across different types of tunnels and consecutive sections of the same tunnel. As tunnel length increases, the driving stability of following vehicles decreases, but the level of driving safety risk is not positively correlated with tunnel length. Significant vehicle trajectory oscillation is observed within the inner sections of long and extra-long tunnels, and a significant relationship between the acceleration of following vehicles and the location within the tunnel section is found.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Rusi Zeng, Zhongwei Shen, Jun Luo
Summary: The urban underground complexes (UUCs) in China have been effective in solving urban problems, but users have expressed dissatisfaction with the internal physical environment. Personal characteristics and environmental factors play significant roles in determining users' satisfaction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Gabriel Lehmann, Heiko Kaeling, Sebastian Hoch, Kurosch Thuro
Summary: Analysing and predicting the advance rate of a tunnel boring machine (TBM) in hard rock is important for tunnelling projects. This study focuses on small-diameter TBMs and their unique characteristics, such as insufficient geotechnical information and special machine designs. A database of 37 projects with 70 geotechnically homogeneous areas is compiled to investigate the performance of small-diameter TBMs. The analysis shows that segment lining TBMs have higher penetration rates, and new approaches for the penetration prediction of pipe jacking machines in hard rock are proposed.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Ren, Ming Qiao, Jon Roberts, Jennifer Hines, Yang-Wai Chow, Wei Zong, Adrian Sugden, Mark Shepherd, Matthew Farrelly, Gareth Kennedy, Faisal Hai, Willy Susilo
Summary: Long-term exposure to coal and silica dust during underground tunnelling operations is a growing concern. To bridge the gap between knowledge in dust exposure monitoring and frontline workers, a virtual reality educational tool was developed to visualize ventilation and dust flow characteristics. This tool allows workers to better understand decision-making and best practices for dust controls.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Dong Lin, Zhipeng Zhou, Miaocheng Weng, Wout Broere, Jianqiang Cui
Summary: Metro systems play a vital role in the transportation, economic, environmental and social aspects of cities. The uncertainties in construction, passenger comfort and safety, as well as efficiency and reliability of the metro system, have been widely studied. Metro systems influence urban development and have a positive impact on housing prices, public health, and environmental quality. Further research is needed to fill the research gaps and make recommendations for future studies.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Wei Yu, Bo Wang, Xin Zi, Jie Dong
Summary: In this study, a whole-process analytical theory for the coupled deformation of deep circular tunnel surrounding rock and prestressed yielding anchor bolt (cable) system is derived and validated through numerical simulations. The results show that anchor bolts (cables) can significantly reduce the convergence of surrounding rock, and factors such as support timing and anchor cable length have important effects on the support effectiveness.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
