Article
Engineering, Geological
Guopeng Lyu, Chuanbo Zhou, Nan Jiang
Summary: This study investigates the damage characteristics and distribution of grouted surrounding rock induced by tunnel blasting through ultrasonic testing and numerical simulation analysis. The results show that there is a certain pattern in the depth and degree of damage to the surrounding rock along the tunnel cross-section. Based on the findings, recommendations for reinforcement are proposed.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Civil
Mingnan Xu, Xinping Li, Kun Xu, Tingting Liu, Yi Zhang, Ting Yang
Summary: The spatial distribution of underground tunnels has a significant impact on stress redistribution in surrounding rock masses and blast wave propagation. Field blasting tests were conducted to study the propagation of blast-induced seismic waves in underground tunnels of the Xiluodu Hydropower Station in China. The results indicate that the peak horizontal particle vibration velocity can be used as a safety criterion for underground tunnels. Numerical simulations were then used to investigate the effects of in situ stresses and spatial distributions of the tunnel group on vibration velocity distribution. The results show a significant amplification of blasting vibrations in adjacent tunnels, depending on their vertical positions during excavation.
Article
Chemistry, Multidisciplinary
Jiancong Xu, Huihao Xue, Guorong Rui
Summary: With the large-scale construction of urban traffic tunnels in China, the use of drilling-blasting method to underpass existing buildings and structures has become common. This paper proposes an improved damage model and applies it to evaluate the blasting construction of rock tunnels closely under-passing sewage box culverts. The numerical simulation results show that the safe distance between the tunnel and box culvert should be no less than 4.0 m.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Zi-qiang Li, Zheng Li, Wei-wei Huang, Xuan-ming Ding, Hang Zhang
Summary: In this study, the influence of key blasthole parameters on tunnel overbreak during blasting construction was determined using an independently developed intelligent detection system. The results showed that blasthole angle, opening position, and charge mass have significant effects on tunnel overbreak, with blasthole opening position being the key parameter. The theoretical analysis, finite element simulation, and measurements yielded consistent distributions of tunnel overbreak volume.
Article
Construction & Building Technology
A. Saadatmand Hashemi, P. Katsabanis
Summary: This paper investigates the use of controlled explosives to introduce fractures in rock material for deep underground mining and tunneling activities as a tactic to alleviate rockburst potential. By utilizing destress blasting techniques, the stress states ahead of a tunnel face can be transformed, reducing peak stresses and pushing them further away. The effectiveness of current destressing blast patterns in creating damage zones and altering stress states is studied, with a new destress blasting pattern introduced to effectively change stress states ahead of a tunnel development face.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Acoustics
Pei Zhang, Jianhua Cai, Feng Zong, Yanpeng He, Qiong Wang
Summary: Through numerical simulations, it was found that the clear distance and height difference between two tunnels affect the dynamic response characteristics, with an increase in height difference leading to higher vibration velocity in the tunnel lining. In particular, when the height difference between tunnels is 4-6 meters, there is a significant change in vibration velocity and displacement at monitoring points on the blasting side of the tunnel.
SHOCK AND VIBRATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhan Yu, Jianfu Shao, Gilles Duveau, Minh-Ngoc Vu, Gilles Armand
Summary: This study focuses on numerical modeling of hydromechanical response and induced damage zones around an experimental gallery at the underground research laboratory in France, using a new phase-field method that considers two independent damage fields to describe both tensile and shear cracks. The method is extended to saturated porous media by incorporating the effect of fluid pressure, and is able to well describe the main features of hydromechanical responses and damage processes.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Construction & Building Technology
Yingjie Yuan, Huixiang Sun, Zhuo Chen, Erlei Bai, Huiying Sun
Summary: The paper establishes a model of underground arch structure with elastic support and conducts a modal analysis and dynamic analysis on the structure using ANSYS/LS-DYNA software. The results show that elastic support can reduce the dynamic response of the structure, decrease the equivalent stress and pressure of the underground arch structure, but increase the peak vertical displacement. In addition, the isolation efficiency of equivalent stress and pressure at the arch shoulder is lower than that at other parts.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Jiadong Qiu, Xibing Li, Diyuan Li, Yuzhe Zhao, Chuwei Hu, Lisha Liang
Summary: The study reveals that different blasting locations near the tunnel lead to different failure patterns, with a conical failure occurring when the blasthole is far from the tunnel and a V-shaped failure occurring when the blasthole is close to the vertical wall near the tunnel.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Energy & Fuels
Alexander Pomasoncco-Najarro, Claudio Trujillo-Valerio, Luis Arauzo-Gallardo, Carlos Raymundo, Grimaldo Quispe, Francisco Dominguez
Summary: The controlled blasting technique proposed in this study effectively reduces overbreaking in underground mining development galleries, leading to cost reduction and improved physical stability. The study demonstrates the importance of geomechanical studies in determining rock quality for drilling mesh design and explosive selection, resulting in minimal damage to the mining work. Simulation with software optimizes parameters and reveals significant reduction in excess excavation and support costs.
Article
Acoustics
Sheng Wan, Junhong Huang, Yi Luo, Xinping Li, Qingsong Pu
Summary: The study used dynamic finite element software to simulate the cumulative damage characteristics of rock anchor beam concrete structures under multiple blasting at different ages, finding that blasting can cause damage at certain time points and that the number of blasts and blast center distance have an impact on cumulative damage characteristics.
SHOCK AND VIBRATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Zorica Radakovic-Guzina, Branko Damjanac, Tom Lam, Hossein A. Kasani
Summary: Evaluation of stability and damages in the geosphere surrounding a deep geological repository is crucial for assessing repository performance. In this study, a novel approach based on the bonded block model is used to simulate damage evolution and fracturing around the repository rooms. The results indicate that the hypothetical DGR configurations have good stability in both sedimentary and crystalline geological settings.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Geochemistry & Geophysics
Thanh Son Nguyen
Summary: The article examines the geological disposal of radioactive waste in the crystalline rock formations of the Canadian Shield, focusing on the Lac du Bonnet granite found at the Underground Research Laboratory in Manitoba, Canada. A constitutive model based on Mohr-Coulomb plasticity was developed to simulate compression tests and predict the rock mass response to excavation.
Article
Engineering, Geological
Ling Ji, Chuanbo Zhou, Shiwei Lu, Nan Jiang, Marte Gutierrez
Summary: The study reveals that multiple full-face blasting provides more accurate simulation of tunnel blasting process and has a significant impact on the maximum damage depth in the middle of the tunnel invert.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Sheng Luo, Peng Yan, Wen-Bo Lu, Ming Chen, Gao-Hui Wang, Ang Lu, Xiao Liu
Summary: The study found that the level of in-situ stress has a significant impact on blasting damage, with the extent of damage varying with the level of in-situ stress. In the decreasing part of the stress level, blasting load is the dominant factor causing tensile-shear damage; while in the increasing part, the secondary stress field induced by excavation takes over, mainly causing compress-shear damage.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Seungbeom Choi, Byungkyu Jeon, Sudeuk Lee, Seokwon Jeon
Article
Construction & Building Technology
Fahimeh Yavartanoo, Thomas H. -K. Kang, Seokwon Jeon, Sung-Gul Hong
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2019)
Article
Geosciences, Multidisciplinary
Seungbeom Choi, Dae-sung Cheon, Hoyoung Jeong, Seokwon Jeon
Article
Engineering, Mechanical
Hoyoung Jeong, Byungkyu Jeon, Seungbum Choi, Seokwon Jeon
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2020)
Article
Engineering, Geological
Jung-Wook Park, Yves Guglielmi, Bastian Graupner, Jonny Rutqvist, Taehyun Kim, Eui-Seob Park, Changsoo Lee
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2020)
Article
Chemistry, Multidisciplinary
Hoyoung Jeong, Seungbeom Choi, Sudeuk Lee, Seokwon Jeon
APPLIED SCIENCES-BASEL
(2020)
Article
Construction & Building Technology
Changsoo Lee, Jaewon Lee, Seunghun Park, Sangki Kwon, Won-Jin Cho, Geon Young Kim
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2020)
Article
Construction & Building Technology
Hoyoung Jeong, Seungbeom Choi, Seokwon Jeon
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2020)
Article
Construction & Building Technology
Shahabedin Hojjati, Deniz Tumac, Seokwon Jeon
Summary: This study aimed to develop a prediction model for impact hammers based on two subway tunnels built in Istanbul. Non-linear analysis was conducted using gene expression programming and particle swarm optimization, with successful validation of the accuracy and reliability of the prediction model.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yudhidya Wicaksana, Hoyoung Jeong, Seokwon Jeon
Summary: This study investigates the mechanical cutting issue from a dynamic perspective, revealing the characteristics of rock under dynamic loading and designing experiments to validate dynamic mechanical properties. The research demonstrates that dynamic inputs in numerical simulations of pick cutting provide more accurate results compared to quasi-static inputs, offering a unique approach to evaluating mechanical excavation problems in rock dynamics.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Thermodynamics
Seok Yoon, Gi-Jun Lee, Tae-Jin Park, Changsoo Lee, Dong-Keun Cho
Summary: This study evaluated the thermal conductivity of bentonite buffer materials at high temperatures and found that higher initial saturation leads to higher thermal conductivity. The results of this study are important for understanding the characteristics of the buffer material under high temperature conditions.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Civil
Byungkyu Jeon, Hoyoung Jeong, Seungbeom Choi, Seokwon Jeon
Summary: This study developed a new assessment technique to evaluate subsidence risk in mining areas. Numerical simulations and statistical analysis were used to consider the impacts of cavity geometrical features and rock mass conditions on subsidence. The relationship between influencing factors and safety factors were quantitatively obtained. The assessment technique also considered the influence area of subsidence at surface and the interaction of multiple cavities.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Computer Science, Information Systems
Long Li, Zaobao Liu, Yuchi Lu, Fei Wang, Seokwon Jeon
Summary: A new hybrid model combining an improved extreme learning machine and optimization algorithm is proposed to predict the thrust of tunnel boring machines. The model shows superior performance in safe and efficient construction and has been validated in a real project.
Article
Engineering, Civil
Hoyoung Jeong, Yudhidya Wicaksana, Sehun Kim, Seokwon Jeon
Summary: Undercutting using an actuated disc cutter (ADC) involves more complex cutting mechanism than traditional rock cutting does. By conducting laboratory-scale testing using ADC, it was found that ADC may potentially provide a more efficient cutting than traditional methods.
GEOMECHANICS AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Yudhidya Wicaksana, Seokwon Jeon
GEOSYSTEM ENGINEERING
(2020)
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)
