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Geomechanics and Engineering Volume 34, Number 3, August10 2023 , pages 251-265 DOI: https://doi.org/10.12989/gae.2023.34.3.251 |
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Investigation of crack growth in a brick masonry wall due to twin perpendicular excavations |
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Mukhtiar Ali Soomro, Dildar Ali Mangnejo and Naeem Mangi
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| Abstract | ||
| In urban construction projects, it is crucial to evaluate the impacts of excavation-induced ground movements in order to protect surrounding structures. These ground movements resulting in damages to the neighboring structures and facilities (i.e., parking basement) are of main concern for the geotechnical engineers. Even more, the danger exists if the nearby structure is an ancient or masonry brick building. The formations of cracks are indicators of structural damage caused by excavation-induced ground disturbances, which pose issues for excavation-related projects. Although the effects of deep excavations on existing brick masonry walls have been thoroughly researched, the impact of twin excavations on a brick masonry wall is rarely described in the literature. This work presents a 3D parametric analysis using an advanced hypoplastic model to investigate the responses of an existing isolated brick masonry wall to twin perpendicular excavations in dry sand. One after the other, twin perpendicular excavations are simulated. This article also looks at how varying sand relative densities (Dr = 30%, 50%, 70%, and 90%) affect the masonry wall. The cracks at the top of the wall were caused by the hogging deformation profile caused by the twin excavations. By raising the relative density from 30% to 90%, excavation-induced footing settlement is greatly minimized. The crack width at the top of the wall reduces as a result of the second excavation in very loose to loose sand (Dr = 30% and 50%). While the crack width on the top of the wall increases owing to the second excavation in medium to very dense sand (Dr = 70% and 90%). | ||
| Key Words | ||
| damage; masonry wall; parametric study; twin excavations | ||
| Address | ||
| Mukhtiar Ali Soomro: School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, P. R. China Dildar Ali Mangnejo: Department of Civil Engineering, Mehran University of Engineering and Technology, Shaheed Zulfiqar Ali Bhutto Campus, Khairpur Mir' s Sindh, Pakistan Naeem Mangi: Department of Civil Engineering, Quaid-e-Awam University of Engineering, Science & Technology, Sindh, Pakistan | ||