Article
Engineering, Multidisciplinary
Yaocai Ma, Hehua Zhu, Wuqiang Cai, Chenlong Su, Xiangyang Wei
Summary: Based on the unified strength criterion, this study proposes an analytical solution to investigate the impact of tunnel axial stress on the development of failure zone around a circular tunnel. The proposed method handles the non-axisymmetric problem under a high and complex three-dimensional stress condition. The mechanical behavior of the rock mass follows an elastic-brittle-plastic model. The presented solution is compared with published analytical solutions, demonstrating its reliability and generality.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Construction & Building Technology
Yaocai Ma, Aizhong Lu, Hui Cai, Xiangtai Zeng
Summary: An analytical solution is proposed for studying the plastic zones developed around two circular tunnels with unequal size excavated in intact rock governed by the Mohr-Coulomb yield criterion. The solution involves the use of conformal transformation to map the elastic-plastic interfaces on the physical plane onto an annulus on the image plane. A set of nonlinear equations involving mapping function coefficients is constructed, and the differential-evolution algorithm is used to solve these equations.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Geological
Haohua Chen, Hehua Zhu, Lianyang Zhang
Summary: This paper introduces a new analytical solution for deep circular tunnels in rock, taking into account the disturbed zone, 3D strength, and large strain. Through MATLAB analysis, the proposed solution was validated and extensive parametric studies were conducted, revealing significant effects of the disturbed zone and flow rule on stress and displacement distributions around the tunnel.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Construction & Building Technology
Zongwu Song, Hongyuan Liu, Chunan Tang, Xiangyong Kong
Summary: Through field monitoring and numerical simulation analysis, this study found that the development patterns of the excavation damaged zones (EDZs) around the rectangular coal roadway in longwall mining processes mainly involve tensile and shear failures, the development of remote cracks, and the impact of roadway geometry.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Review
Mechanics
Min Wang, Zhijian Yi, Ya Li, Tuo Zhang, Jie Liu, Zhixiang Wang, Kang Su, Jiaming Zhang, Yu Tang
Summary: The concept of analyzing the elastic-plastic field near the crack line emerged in the mid-1980s. However, the traditional crack tip field analysis method and the small-scale yield condition limited its solutions and applications. In 1994, by obtaining the general solution of the plastic stress and displacement fields near the crack line, the authors developed an independent crack line field analysis method. This method has since been widely used in the elastic-plastic analysis of cracks and has solved many problems. This paper summarizes its underlying principle, reviews its applications, and discusses its future development.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Zhichao Zhang, Linhang Li, Zhenglong Xu
Summary: This paper presents a hyperelastic-plastic coupled constitutive model for bonded and unbonded soils based on thermodynamics. The model can naturally predict state boundaries and failure surfaces of different soils, and reproduce various elasto-plastic coupling features.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Construction & Building Technology
Fengyu Ren, Xialiang Qiao, Jianli Cao
Summary: The paper focuses on the fractures in the excavation damaged zone (EDZ) of an underground iron mine roadway and proposes an assessment method based on borehole television (BTV) image data. The method classifies the surrounding rock into different zones and provides a better basis for support design, resulting in improved support effect and economic benefits.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Mechanics
Longkun Lu, Zhanli Liu, Zhuo Zhuang
Summary: This paper explores the physical meanings of two incremental J-integrals for crack growth in elastic-plastic materials, one based on free energy density and the other based on internal energy density. It indicates that energy balance criteria must be satisfied during crack growth in an elastic-plastic solid, and considers a cracked body as containing two independent thermodynamic systems.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Sara Farooq, Gentaro Aoki, Misato Fujishima, Taito Miura, Hikaru Nakamura
Summary: This study evaluated the fracture process of concrete with alkali silica reaction (ASR) cracks under compressive stress. The evolution of expansion cracks under different loading conditions was assessed using digital image correlation (DIC). The results showed that an increase in the expansion level significantly decreased the elastic modulus of concrete but only slightly reduced the compressive strength. The stress resistance mechanism in the cross-section of ASR-damaged concrete was explained based on the observed behaviors.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Chenghong Duan, Zunwu Wang, Jinhao Huang, Xiangpeng Luo, Mingwan Lu
Summary: This paper introduces the dual criteria for pressure vessel design, focusing on preventing plastic collapse and excessive overall plastic deformation. Feasible schemes are proposed and incorporated into ANSYS finite element software for assessment.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Xiao Li, Jiayin Zhai, Zhijun Shen
Summary: This paper analyzes the wave structures of one-dimensional elastic-perfectly plastic solid Riemann problem in elastic, plastic, and elastic-plastic phases. The research focuses on the shock transition properties of the Wilkins model with the Mie-Gruneisen equation of state. The study discusses the characteristics of the Hugoniot curve and function for pure elastic and plastic, and explores the wave structure during a strong shock transition from the elastic state to the plastic state. The complete exact Riemann solution is obtained, with a total of forty-nine possible solution types identified and enumerated for the first time.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Lan Cui, Qian Sheng, Junjie Zheng, Mingxing Xie, Yang Liu
Summary: This paper investigates the prediction of the elastic modulus of rock and rock mass and proposes a unified expression that considers the coupling effects of plastic strain and confining stress. The variation of the elastic modulus with plastic strain and confining stress for different types of rocks is analyzed using laboratory results. A deterioration model for the elastic modulus is developed using nonlinear fitting regression, which can be used in the analysis of tunnels and underground caverns to provide a more realistic mechanical behavior of rock mass.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Mechanical
Debojyoti Pandit, Vilander Naoroibam, Tamaghna Biswas
Summary: This article attempts to numerically evaluate the elasto-plastic material models by phenomenological modeling. The main purpose is to aid research-minded students and instructors in studying the subject and encourage the development of unique material models.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Article
Mechanics
Tito Andriollo, Varvara Kouznetsova
Summary: The study reveals that the applicability of Irwin's estimate in metals with particles is questionable when the plastic zone size is comparable to the particle spacing. A new compact formula for plastic zone size is proposed in this scenario where the PZ shape differs from von Mises plasticity expectation.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
E. O. Mairtin, J. Concannon, G. Parry, J. P. McGarry
Summary: This study provides a detailed investigation into the mechanisms and parameters governing stent-coating delamination, finding that the mode mixity of delamination depends on stent deployment level. The interface tractions increase with both increasing stent thickness and coating thickness, and stent plasticity leads to more complex traction patterns.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Ali Ghorbani, Amin Eslami
Summary: The study introduces a comprehensive energy-based model for evaluating liquefaction potential in sandy soils, taking into account factors such as Plasticity Index and loading Frequency. The model was developed in two steps, validated with 100 worldwide case histories, and found to be superior to previous energy-based models. Parametric analysis showed that fine content and Plasticity Index are the main factors influencing liquefaction capacity in sandy soils.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Civil
Ali Ghorbani, Iman Hosseinpour, Mehdi Shormage
Summary: The study investigated the influence of stone columns and basal geosynthetic on deformations and stability of an embankment over soft deposit. The results showed that stone columns significantly reduced total deformations of the subsoil, while a high stiffness basal geogrid improved the stability of the embankment.
KSCE JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Ali Lakirouhani, Reyhaneh Jafari, Hadi Hasanzadehshooiili
Summary: This paper presents a three-dimensional finite difference analysis to study the interactive effects of sequential tunneling and superstructure on ground settlement profiles. The numerical modeling accuracy is validated and effects of tunnel diameter, depth, and number of superstructure stories on settlement profiles are investigated. The study shows a direct relationship between tunnel depth and diameter, and settlement, with the number of superstructure stories having a more considerable effect on maximum settlement compared to free-field conditions.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Ali Ghorbani, Hadi Hasanzadehshooiili, Amin Eslami
Summary: The study proposes a new, simple, and accurate method for predicting the ground reaction curve (GRC) of circular tunnels constructed in damaged, elastoplastic rock masses with softening in the plastic zone. The method takes into account the effects of deterioration caused by excavation/blast by assuming a reduced and varying Young's modulus using a disturbance factor.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Nader Shariatmadari, Hadi Hasanzadehshooiili, Pooria Ghadir, Fatemeh Saeidi, Farshad Moharami
Summary: Geopolymers have gained attention as construction materials, with this study investigating the use of volcanic ash and ground granulated blast furnace slag as replacements for portland cement to stabilize sandy soils. Predictive modeling using artificial neural networks and sensitivity analysis identified the Si/Al ratio as the parameter most affecting compressive strength.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Engineering, Geological
Iman Hosseinpour, Ali Ghorbani, Javad Zarei, Sunil Ranjan Mohapatra
Summary: This research aims to investigate the behavior of granular column-reinforced soft soil under shear stress. Large-scale direct shear tests were performed, revealing that the use of granular column improves the shear resistance of the composite ground, especially at lower undrained shear strength of the soft clay. Additionally, the use of highly compacted column results in a decreased shear displacement, providing indirect evidence of stiffness improvement of the composite ground.
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Geological
Amin Eslami, Ali Ghorbani
Summary: This study investigates the seismic response and liquefaction resistance of Monopile and Suction Bucket Foundations for offshore wind turbines using coupled numerical modeling and soft computing. Non-linear dynamic analysis and centrifuge studies were carried out to develop prediction models and verify their accuracy.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Environmental
Ali Shafiei, Mohammad Aminpour, Hadi Hasanzadehshooiili, Ali Ghorbani, Majidreza Nazem
Summary: The mechanical strength of calcium carbonate-enriched marl soil under the effect of freeze-thaw cycles was improved by introducing a combination of ordinary Portland cement and lignosulfonate. Microstructural investigations demonstrated the development of new calcium-aluminate-silicate-hydrate products and a denser structure with lower porosity. Various machine learning algorithms were employed for cost-effective and accurate prediction of the soil's strength.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Ali Ghorbani, Hadi Hasanzadehshooiili, Mohammad Ali Somti Foumani, Jurgis Medzvieckas, Romualdas Kliukas
Summary: Currently, there is no methodology to directly evaluate the liquefaction potential of saturated sand materials reinforced by cement grout-injected micropiles. Shaking table model tests were conducted to obtain data on pore water pressures, excess pore water pressure ratios, and the number of cycles required for soil liquefaction. Predictive equations for estimating excess pore water pressure ratios were developed using genetic programming and the least square method.
Article
Construction & Building Technology
Mohammad-Hossein Nofalah, Pooria Ghadir, Hadi Hasanzadehshooiili, Mohammad Aminpour, Akbar A. Javadi, Majidreza Nazem
Summary: This study investigates the strength and shrinkage behavior of volcanic ash (VA) and ground granulated blast furnace slag (GGBFS) based geo-polymers under different curing conditions. The effects of binder proportion and curing conditions on the properties of mortar are evaluated. Machine learning algorithms and an evolutionary model are employed to develop accurate predictive models for compressive strength and drying shrinkage.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Geochemistry & Geophysics
Ali Ghorbani, Amin Eslami
Summary: This study conducted a probabilistic seismic hazard assessment for Guilan Province in Iran, estimating peak ground acceleration and spectral acceleration over bedrock for the entire province. The results were compared with Iranian seismic code of practice and previous studies, highlighting the need for revisions in some areas.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Engineering, Geological
Ali Ghorbani, Hakimeh Rabanifar
Summary: Non-conventional materials, such as Lightweight Expanded Clay Aggregate (LECA), are commonly used to dissipate the energy of dynamic loads and mitigate liquefaction. The study found that adding 5% and 10% LECA to saturated sand resulted in a significant decrease in excess pore water pressure generation, while higher LECA content led to an increase in excess pore water pressure generation. The mechanisms behind these behaviors involve a contradiction in the effects of increasing soil mixture damping and reducing effective initial stress as a function of overall mixture density.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(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)
