Article
Engineering, Geological
Mohsin Usman Qureshi, Zafar Mahmood, Ali Murtaza Rasool
Summary: This paper analyzes the in situ permeability in limestone and sandstone formations for hydraulic structures in Oman and examines the relationship between permeability and rock quality designation. The study finds that in situ permeability decreases as rock quality designation increases at certain depths.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Construction & Building Technology
Ozguer Satici, Tamer Topal
Summary: The study investigates the relation between damage zone thickness and tunnel wall convergence for horseshoe-shaped highway tunnels using empirical methods. By gathering data through in-situ convergence measurements and numerical models, estimates for damage zone thickness and convergence were made, showing agreement with real measurements.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Geological
Pedro Pazzoto Cacciari, Marcos Massao Futai
Summary: The study used the 3D discrete element method (DEM) to evaluate the potential stability issues in the Monte Seco tunnel, finding that fresh foliation planes ensure the current stability of the tunnel, while underestimating the strength of foliation planes causes unrealistic instability conditions. Weathering advance on fractures and foliation planes can trigger important instability problems over time.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Automation & Control Systems
Liang Chen, Zhitao Liu, Weijie Mao, Hongye Su, Fulong Lin
Summary: This article proposes a TransTP network for real-time prediction of tunnel boring machine (TBM) driving parameters. By collecting a hybrid in situ prediction dataset, the network can learn multiperiod feature representation and extract multivariate features, achieving accurate prediction of TBM driving parameters.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Engineering, Environmental
Guofeng Li, Mingming He, Yue Bai
Summary: In this study, the influence of various heterogeneity factors of rock mass on tunnel displacement was reviewed. The critical deformation formula was derived and a stability evaluation method was proposed using an elastoplastic analytical solution for a circular tunnel. The Sanhekou hydro-junction project was used as an example to establish a finite difference method model for heterogeneous rock mass. A new method was proposed to obtain the basic parameters and evaluate the stability of the heterogeneous rock mass tunnel. The reliability of the stability evaluation method was also verified by monitoring the 2# diversion tunnel of the Zipingpu hydraulic project.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Alan Showkati, Hossein Salari-rad, Mousa Hazrati Aghchai
Summary: One distinctive feature of tunnels is the direct interaction between the primary support and the surrounding rocks, which may vary significantly over time due to changes in rock mass behavior and environmental actions. The proposed methodology for predicting long-term stability of tunnels involves considering chemical weathering of rock, deterioration of primary support, and investigation of common support systems' mechanisms of deterioration. Numerical simulation of a freeway tunnel in Iran shows increasing ground pressure and bending moments on tunnel sidewalls with time, leading to a recommendation for tunnel rehabilitation after 60 years.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Construction & Building Technology
Z. H. Xu, W. Y. Wang, P. Lin, L. C. Nie, J. Wu, Z. M. Li
Summary: The study focuses on the challenges of TBM jamming caused by adverse geological conditions in tunnel construction. Factors contributing to TBM jamming are analyzed, with shield TBM being the most commonly used type. The impact of fractured zones and groundwater on TBM jamming is highlighted, along with the most common hazard mode of surrounding rock collapse. Case studies on Gaoligongshan Tunnel provide practical insights for predicting and controlling TBM jamming, with proposed countermeasures at different stages of TBM tunnel construction. The study serves as a reference for understanding TBM jamming mechanisms and implementing safe excavation practices in challenging geological conditions.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xinmin Ma, Yiguo Xue, Daohong Qiu, Teng Xia, Chuanqi Qu, Fanmeng Kong
Summary: Rock mass classification is essential for evaluating tunnel rock stability and determining construction methods and support parameters. This study proposes a fine classification method for tunnel construction by using multiple geological methods to obtain engineering geological response parameters and information. A prediction model is established and validated using actual engineering data. The study improves the accuracy and practicality of rock mass classification for tunnels, providing guidance for tunnel construction optimization.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Md Alquamar Azad, A. K. Naithani, S. K. Singh
Summary: This paper discusses the documentation of excavation method and support design for a tunnel being constructed in Garhwal Himalaya, India, based on rock mass classification systems. The study found that the estimation of rock mass based on the rock mass rating (RMR) was overstated, but the qualitative assessment was accurate. The New Austrian tunneling method (NATM) was found to be more adaptable for the rocks in the Garhwal Himalaya.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2022)
Article
Engineering, Civil
Wencong Qi, Lihui Wang, Siyang Zhou, Yilan Kang, Qian Zhang
Summary: This study analyzes the interaction characteristics between tunnel boring machines (TBMs) and rock-soil interface mixed ground (RSI), and proposes a model to calculate the total thrust and total torque. The rationality and applicability of the model are validated by two typical projects. The results show that the ratio of total torque to total thrust decreases when the rock layer proportion in the excavation face increases.
Article
Engineering, Environmental
Seyed Mahdi Pourhashemi, Kaveh Ahangari, Jafar Hassanpour, Seyed Mosleh Eftekhari
Summary: This study evaluated and analyzed the relationships between rock properties and TBM performance parameters in grinding-dominated mode. By statistical analysis, simple empirical equations were developed to accurately predict TBM performance in similar geological conditions where grinding is dominant.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Civil
Jaspreet Singh, Sarada Prasad Pradhan, Vikram Vishal, Mahendra Singh
Summary: Rock mass heterogeneity due to structural discontinuities poses a significant concern to transportation. Characterizing the rock mass is crucial for preliminary investigation, with the Geological Strength Index (GSI) being a commonly used method. Advances in computational techniques, such as discrete fracture network (DFN) modeling and remote sensing, provide more precise data for examining rock mass characteristics. This work focuses on incorporating DFN in estimating GSI and utilizes machine learning to digitize the standard GSI chart.
TRANSPORTATION GEOTECHNICS
(2023)
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
Environmental Sciences
Yiguo Xue, Haiting Liu, Chenghao Bai, Maoxin Su, Daohong Qiu, Binghua Zhou, Yuehao Yu, Xudong Jiang
Summary: This paper proposes a method to predict the deformation grade of soft rock tunnel. By selecting influencing factors, grading indexes, and calculating weights, a prediction model is established and applied to the Huangjiagou tunnel of the Zhengwan high-speed railway, achieving good results.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Chuanwei Zang, Hongmo Zhu, Miao Chen, Shuo Yang, Liu Yang, Jia Zhou, Zuoru Zhang, Yang Chen
Summary: The study found that different dip angles and confining pressures significantly affect the mechanical properties of composite rock strata with holes, with peak strength and elastic modulus changing with increasing dip angle and confining pressure. The first damaged area in the composite rock strata shifts from soft rock to hard rock with increasing dip angle, while the range of tensile stress concentration area decreases substantially with the increase in confining pressure.
Article
Chemistry, Multidisciplinary
Moustafa Moufid Kassem, Salmia Beddu, Wong Qi Min, Chee Ghuan Tan, Fadzli Mohamed Nazri
Summary: This study evaluated the seismic performance of transmission towers and found that near-field earthquakes have a greater impact on the towers, resulting in higher vulnerability and fragility compared to far-field earthquakes.
APPLIED SCIENCES-BASEL
(2022)
Review
Water Resources
Saad Mawlood Saab, Faridah Binti Othman, Chee Ghuan Tan, Mohammed Falah Allawi, Ahmed El-Shafie
Summary: This study reviews previous research on optimizing reservoir system operating policies in the past 20 years and provides an overview of the application of AI-based models for predicting reservoir inflow and evaporation. The advantages and disadvantages of optimization algorithms and predictive models are summarized, and recommendations for future research are included in this review.
APPLIED WATER SCIENCE
(2022)
Review
Engineering, Civil
Ali Muftah Abdussalam Ezreig, Mohd Ashraf Mohamad Ismail, Khaled Ibrahim Azarroug Ehwailat
Summary: This study provides a thorough review of existing soil stabilisers for laterite soils, including their composition, stabilisation mechanism, and the effectiveness of various economical and eco-friendly materials. The study aims to improve the characteristics of laterite soils and highlights the challenges and future prospects of the use of soil stabilisers for laterite soil stabilisation.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2022)
Article
Geosciences, Multidisciplinary
Yong Ping Oh, Mohd Ashraf Mohamad Ismail
Summary: Most high-rise buildings or bridges are supported by drilled cast in-situ piles. Many practitioners neglect the importance of pile settlement analysis and omit the instrumented ultimate test pile in construction programs. Lack of knowledge on pile-soil response could lead to overdesign or under-design of the piled foundation system.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Water Resources
Saad Mawlood Saab, Faridah Othman, Chee Ghuan Tan, Mohammed Falah Allawi, Mohsen Sherif, Ahmed El-Shafie
Summary: Reservoir inflow (Q(flow)) forecasting is a crucial process for water resources management. Traditional physical models have limitations, while the development of machine learning models, particularly deep learning neural networks (DLNN), shows promise in the field of water resources. This research applied DLNN to forecast Q(flow) in two different catchment areas and compared it with two classical neural network algorithms. The research also explored the use of genetic algorithm (GA) for feature selection. The findings confirmed the feasibility of the DLNN model and its accuracy in solving daily scale Q(flow) compared to monthly scale.
APPLIED WATER SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Andrew Lee Kwan Yee, Mazlina Razali, Mohd Ashraf Mohamad Ismail, Intan Norsheira Yusoff, Sharan Kumar Nagendran, Zuraini Zainal, Hayato Tobe, Kensuke Date, Yasuhiro Yokota
Summary: Rock slope instability in tropical regions leads to rock slope failure through weathering processes. A new evaluation method for weathering assessment of limestone rock slope using computer-assisted image processing technologies is proposed in this study. Results show that the CIEL*a*b color space is an effective tool for the preliminary assessment of rock mass weathering.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Geosciences, Multidisciplinary
Raja Asyraf Azizan Raja Adnan, Mohd Ashraf Mohamad Ismail, Intan Norsheira Yusoff, Hayato Tobe, Takako Miyoshi, Kensuke Date, Yasuhiro Yokota
Summary: The JRC of a rock block sample is determined using image analysis technique and compared with manual Barton comb profilometer results to evaluate the reliability of the CRP technique. A high-resolution image captured by a drone is processed to create a three-dimensional model with four quality ratings: low, medium, high, and ultrahigh. The ultrahigh quality rating achieves the most accurate measurement with 0% error compared to the Barton comb measurement.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Geosciences, Multidisciplinary
Ali Muftah Abdussalam Ezreig, Mohd Ashraf Mohamad Ismail, Khaled Ibrahim Azarroug Ehwailat
Summary: Agricultural by-products waste, such as POFA and MgO activator, were used to chemically stabilize laterite soil, aiming to eliminate improper waste disposal and reduce greenhouse gas emissions from cement production. Different percentages of additives and MgO were added to the soil and cured at room temperature. Tests and analyses showed that the use of POFA-MgO significantly increased the soil's compressive and flexural strength, making it suitable for pavement base material.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Geosciences, Multidisciplinary
Intan Norsheira Yusoff, Mohd Ashraf Mohamad Ismail, Hayato Tobe, Takako Miyoshi, Kensuke Date, Yasuhiro Yokota
Summary: This study proposes a new measurement system based on Structure from Motion (SfM) photogrammetry to evaluate tunnel faces. The system generates a 3D point cloud model and determines the discontinuity patterns and orientations for evaluating the stability of tunnel faces. Results show that the system can consistently measure the discontinuity patterns and orientations compared to the real tunnel face model when using high-quality settings. The cluster analysis and manual verification provide insights into the different angles of the discontinuities.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Engineering, Civil
Mazlina Razali, Mohd Ashraf Mohamad Ismail, Andrew Lee Kwan Yee, Raja Asyraf Azizan Raja Adnan, Kenichi Kawano, Kensuke Date, Yasuhiro Yokota, Sharan Kumar Nagendran, Zuraini Zainal
Summary: This study presents the relationship between the elastic modulus of knocking ball (Ekb) and the uniaxial compressive strength of the Schmidt hammer (UCS-Schmidt) in weathered Setul limestone. The knocking ball method is effective in predicting the in-situ elastic modulus of rock slopes.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Optics
Kok Zee Kwong, Waldo Udos, Kok-Sing Lim, Foo Wei Lee, Chee Ghuan Tan, Muhamad Zharif Samion, Harith Ahmad
Summary: This study presents a corrosion monitoring technique using tilted fiber Bragg grating (TFBG) for assessing steel bar corrosion in reinforced concrete structures. By digitally processing the acquired transmission spectrum, a sensitive index is obtained to describe the corrosion activity and level of the embedded steel bar.
Review
Construction & Building Technology
Herman Tawil, Chee Ghuan Tan, Nor Hafizah Ramli Sulong, Fadzli Mohamed Nazri, Muhammad M. Sherif, Ahmed El-Shafie
Summary: Precast concrete sandwich panels (PCSPs) are widely used for external cladding of buildings due to their high thermal efficiency and composite action. They offer a viable alternative for fast deployment of structures with low fabrication and maintenance cost. This review paper discusses the current development of mechanical and thermal properties of PCSPs components and suggests future research directions.
Article
Engineering, Civil
Ahmad Housam Arada, Baki Ozturk, Moustafa Moufid Kassem, Fadzli Mohamed Nazri, Chee Ghuan Tan
Summary: This study analysed the structural capabilities and dynamic performances of sky-bridge-coupled buildings under various ground motions. The results showed that sky-bridges can efficiently control displacement and reduce the probability of damage in higher floors. The most efficient location for the sky-bridge was found to be at 88% of the building height. The use of steel with a hinged connection in the sky-bridge provided better seismic resistance compared to concrete with a fixed connection.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Review
Engineering, Multidisciplinary
Ahmad Mohamad El-Maissi, Moustafa Moufid Kassem, Chee Ghuan Tan, Rijalul Fikri, Fadzli Mohamed
Summary: This paper reviews previous studies on the development of Damage Indices (DI) for Unreinforced Masonry (URM) Buildings and presents simplified assessment methods using DI for predicting seismic vulnerability of URM structures. It aims to provide up-to-date information on the DI methodology for seismic assessment of URM buildings.
ENGINEERING JOURNAL-THAILAND
(2022)
Article
Construction & Building Technology
Tzyy Wooi Teh, Chee Ghuan Tan, Mohd Zamin Jumaat
Summary: This study evaluated the feasibility of using novel hyperelastic composite material (HECM) to develop novel dampers in the future, demonstrating high damping ratio and energy dissipation capacity under axial dynamic load conditions.
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.
