Article
Geosciences, Multidisciplinary
Seunghwan Seo, Jongjeon Park, Younghun Ko, Gunwoong Kim, Moonkyung Chung
Summary: This study aims to evaluate the significance of key design factors that impact the stability of Earth retaining wall anchor-supported structures during urban excavations. Finite-element analyses and field measurements were used to compare and validate the results, finding that soil unit weight and shear strength significantly influence horizontal displacement of the wall, while groundwater level location, surcharge load, and structural stiffness have a relatively minor effect. The study also reveals the distinct influences of design parameter variability across different ground layers.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Geological
Chao-Feng Zeng, William Powrie, Xiu-Li Xue, Miao-Kun Li, Guo-Xiong Mei
Summary: The study found that increasing the length of the buttress wall (L-B) can reduce movements of the retaining wall. However, a smaller L-B may be sufficient when the drawdown depth is small, while a larger L-B is required when drawdown exceeds 60% of the total wall depth.
Article
Engineering, Civil
Wenhao Fan, Feicong Zhou, Shenghao Xie, Mingfan Zhao, Shumi Deng, Jinyi Li, Ping Zhou, Zhijie Wang
Summary: With the rapid development of urban rail transportation, there is a growing number of projects involving new foundation pits near existing metro stations. This study proposes an innovative automated health monitoring system for assessing the uncoordinated deformation of the existing station side wall and row piles under unilateral excavation conditions. The successful application of this monitoring system has revealed two types of uncoordinated deformation in the station side wall and row piles, which can be spatially categorized into three areas: stratigraphic restraint area, shallow excavation area, and deep excavation area. Furthermore, the station side wall and row piles have been determined to exhibit a high degree of safety through Gaussian distribution fitting on the monitoring data.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Construction & Building Technology
Gang Zheng, Xiaopei He, Haizuo Zhou, Yu Diao, Zhiwei Li, Xiaomin Liu
Summary: This paper presents a new strut-free retaining wall system, IVFRW, used for excavation in clay. The field investigations and parametric studies show that IVFRW effectively limits wall deflection and propose a design concept for IVFRW.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Huaibo Song, Huafu Pei, Honghu Zhu
Summary: The application of FBG sensing technology in tunnel construction is validated through laboratory calibration, showing the impact of tunnel excavation on soil deformation and pile disturbance. Results indicate that stress redistribution in the soil above the tunnel leads to more significant surface settlement, affecting the existing piles' displacements. This study confirms the suitability of FBG sensing technology for monitoring tunnel excavation.
Article
Computer Science, Interdisciplinary Applications
Yi Chong Cheng, Ri Hong Zhang, Kui Hua Wang, Zhi Yong Ai
Summary: This study established a time-dependent analysis method for the interaction between retaining piles and stratified saturated soils with transversely isotropic property due to pre-excavation dewatering. Numerical examples were used to verify the proposed method and study the influence of key parameters on the time-dependent behavior of retaining piles. It was found that pile deformation and its growth rate are closely related to the incorporate stiffness of retaining piles and the characterization of soils, while the deflection pattern of the retaining pile depends on the pumping depth.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Civil
Qi-Run Yang, Ming-Guang Li, Jin-Jian Chen
Summary: This study investigated the influence of a flexible retaining wall on an adjacent deep excavation through numerical modeling. Results show that the flexible retaining wall aggravates maximum wall deformation and leads to the inclination of the excavation, mainly attributed to the redistribution of lateral earth pressure resulted from the mobilization of the arching effect.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Chemistry, Analytical
Francesco Freddi, Lorenzo Mingazzi, Emilio Pozzi, Nicola Aresi
Summary: This paper presents the results of laboratory tests conducted on an in-place inclinometer chain for structural and geotechnical monitoring applications. The tests validate the reliability and accuracy of the measurement chain, emphasizing the importance of analyzing the overall behavior of the system.
Article
Multidisciplinary Sciences
Yungang Niu, Qiongyi Wang, Fenghai Ma
Summary: This study investigates the characteristics of how reverse faulting affects the deformation of retaining piles in deep excavation projects. Through various research methods, it is found that reverse faulting exacerbates the deformation of retaining piles, with the upper part being more affected. The overall deformation of the pile exhibits a spoon-shaped curve distribution. The deformation of retaining piles is positively correlated with fault slip distance and fault dip angle, while it is negatively correlated with fault position. The growth rate of the maximum deformation of retaining piles increases with fault slip distance and fault dip angle, but decreases with distance from the fault to the excavation. A predictive model for the maximum deformation of retaining piles under the influence of reverse faulting is developed. These findings provide valuable insights and references for similar engineering projects.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Geological
Chuhan Deng, Stuart K. Haigh
Summary: This study conducted a series of centrifuge tests to explore the deformation mechanisms of loose and dense sand under various movements of active rigid retaining walls. The results showed that the deformation caused by wall translation can be characterized by the superposition of mechanisms with equal but opposite wall rotation about the top and base. The study proposed a simplified deformation mechanism and validated it with the centrifuge test results.
Article
Green & Sustainable Science & Technology
Xiaozhen Fan, Changjie Xu, Luju Liang
Summary: In this study, model tests are conducted to investigate the stress and deformation mechanisms of an embedded cantilevered retaining (ECR) wall during excavations. A displacement-dependent earth pressure coefficient is proposed based on experimental observations to predict the active and passive earth pressure acting on the ECR wall (pile). The proposed displacement-controlled method takes into consideration the location of the rotation point for the design of ECR walls (piles).
Article
Environmental Sciences
Bingxiong Tu, Jinhuo Zheng, Shuaihua Ye, Minglong Shen
Summary: This study investigates the impact of foundation pit excavation on the supporting structure and surrounding environment in a soft-soil area based on a project in Fuzhou, China. The analysis of actual monitoring data reveals spatial and temporal effects on the deformation of the support structure and surrounding structures. The deformation distribution along the excavation pit wall shows that more significant deformations occur in the middle section, decreasing towards the pit corner. Additionally, the rate of deformation increase varies during different construction stages.
Article
Engineering, Geological
Gang Zheng, Zhao-peng Liu, Hai-zuo Zhou, Xiao-pei He, Zhi-yi Guo
Summary: This paper investigates the behavior and retaining mechanism of a newly developed excavation retaining structure called an outward inclined-vertical framed retaining wall (OIVFRW). Through a case history and finite element modeling, it is found that the OIVFRW structure performs well in limiting deformation and the length of the vertical pile and inclination angle have significant contributions to the structure movement.
Article
Construction & Building Technology
Huailong Zhu, Bitang Zhu, Changjie Xu, Wei Liu, Dongdong Guo
Summary: This study investigates the working mechanism and influencing factors of long-short combined retaining piles through field testing and numerical simulation. The results show that the bending moment of the long pile is larger than the short pile, and it increases gradually with the increase in the number of short piles. In addition, reducing short pile length and increasing pile spacing will increase the bending moment and horizontal displacement of the long and short piles, mainly concentrated above the excavation bottom.
Article
Computer Science, Information Systems
Mateusz Lakomski, Grzegorz Tosik, Przemyslaw Niedzielski
Summary: This paper examined the impact of optical fiber sensor design and its integration with PVC sheet piles on deflection and strain monitoring. It was found that fiber sensors with different coating diameters can be utilized for PVC strain and deflection measurement, and correction coefficient may be necessary to ensure accuracy.
Article
Engineering, Ocean
Ahmad Safuan A. Rashid, Mohammad Gharehzadeh Shirazi, Ramli Nazir, Hisham Mohamad, Fauzan Sandi, Suksun Horpibulsuk
MARINE GEORESOURCES & GEOTECHNOLOGY
(2020)
Article
Engineering, Geological
Yin Hoe Ong, Cheng Teik Toh, Sai Kim Chee, Hisham Mohamad
Summary: Analysis of load tests on 100 instrumented bored piles in different weathering grades of different tropical geological formations in peninsular Malaysia showed correlations between ultimate shaft and base resistance with standard penetration test (SPT) results and unconfined compression strengths. The developed models for shaft and base resistance can be used for strain softening, strain hardening, and stiffening behavior, providing accurate predictions for pile performance.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Balarabe Wada Isah, Hisham Mohamad
Summary: This paper explores the possibility of using high-resolution fiber Bragg grating (FBG) sensing technology for on-specimen strain measurement in the laboratory, providing a cost-effective, straightforward method to assess surface deformation and small-strain properties of specimens. The technique has shown adaptability for measuring material deformation and has the potential for routine application in elemental testing due to its relative ease and low-cost instrumentation.
Article
Chemistry, Multidisciplinary
Hamzh Alarifi, Hisham Mohamad, Nor Faridah Nordin, Muhammad Yusoff, Aminu Darda'u Rafindadi, Budijanto Widjaja
Summary: The study examined the lateral interaction between pipelines and sandy soil, finding that lateral soil movement can significantly impact buried pipelines, with the highest stresses located at unstable soil boundaries.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Krisada Chaiyasarn, Nazam Ali, Phatthanayu Phuphasuwan, Nakhorn Poovarodom, Panuwat Joyklad, Hisham Mohamad, Mingliang Zhou, Qudeer Hussain
Summary: This study presented experimental and finite element analysis results of reinforced concrete beams strengthened with natural hybrid FRP layers. The beams strengthened with a U-shaped hybrid FRP composite pattern showed better flexural response and energy dissipation capacities compared to the control beam. The ultimate failure mode of the reinforced beams was due to the rupture of the hybrid FRP composite, while the control beam failed mainly due to flexural cracks at low loads. The strain measurements using BOTDA exhibited similar patterns as conventional strain gage measurements, but were influenced by bottom flexural cracks resulting in shorter strain records.
Article
Construction & Building Technology
Kittipoom Rodsin, Panuwat Joyklad, Qudeer Hussain, Hisham Mohamad, Apichat Buatik, Mingliang Zhou, Krisada Chaiyasarn, Adnan Nawaz, Tahir Mehmood, Amr Elnemr
Summary: The study focuses on using steel clamps as a strengthening material for clay brick aggregate concrete, which effectively enhances the compressive strength of the concrete and has been successful in experiments.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Krisada Chaiyasarn, Apichat Buatik, Hisham Mohamad, Mingliang Zhou, Sirisilp Kongsilp, Nakhorn Poovarodom
Summary: This paper proposes an advanced inspection reporting system based on an integrated CNN-FCN crack detection system, which enables crack inspection and display for larger structures. The system utilizes a trained CNN to detect crack patches and a trained FCN system to segment cracks at the pixel-level. The system shows promising results with high accuracy and precision.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Engineering, Geological
Alarifi Hamzh, Hisham Mohamad, Mohd Fairus Bin Yusof
Summary: This paper focuses on the effects of non-uniform diameters of stone columns on ground improvement in soft soil. Numerical analyses show that non-uniform stone columns can increase the bearing capacity of the soil. The most economical design is achieved with a 2:1 diameter ratio and a 3:7 length ratio.
INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
S. C. Lee, B. P. Tee, M. F. Chong, H. Mohamad, K. A. Ang, P. P. Rahardjo
Summary: This paper presents a case study of a bi-directional load test on a working pile in a limestone formation area, utilizing DFOS technology to measure the continuous strain profile. It discusses the interpretation of anomalies detected through DFOS results. The paper aims to introduce the industry to the superior information obtained using innovative fiber optic technology for geotechnical testing and monitoring.
GEOTECHNICAL ENGINEERING
(2021)
Proceedings Paper
Construction & Building Technology
Izwan Shah Ahmad, Azman Kassim, Hisham Mohamad
4TH INTERNATIONAL CONFERENCE ON CONSTRUCTION AND BUILDING ENGINEERING & 12TH REGIONAL CONFERENCE IN CIVIL ENGINEERING (ICONBUILD & RCCE 2019)
(2020)
Article
Engineering, Civil
Mohammed A. M. Al-Bared, Indra S. H. Harahap, Aminaton Marto, Hisham Mohamad, Seyed Vahid Alavi Nezhad Khalil Abad, Zahiraniza Mustaffa
GEOMECHANICS AND ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
Nor Faridah Mohd Nordin, Hisham Mohamad
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2019)
Article
Engineering, Geological
H. Mohamad, B. P. Tee, M. F. Chong, K. A. Ang, A. S. A. Rashid, R. A. Abdullah
GEOTECHNICAL ENGINEERING
(2019)
Article
Engineering, Civil
Balarabe Wada Isah, Hisham Mohamad, Niraku Rosmawati Ahmad
INTERNATIONAL JOURNAL OF GEOMATE
(2019)
Article
Engineering, Civil
Chee-Min Khoo, Thanath Gopalan, Nurfatin Afifah Abdul Rahman, Hisham Mohamad
INTERNATIONAL JOURNAL OF GEOMATE
(2019)
