Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Deep Excavation on Deformation of Diaphragm Wall and Adjacent Structures
With the rapid urbanization in Hanoi, effect of the construction of deep excavations on their adjacent buildings has been a pressing issue, mainly related to the soil displacements. Finite element method is a powerful tool to consider many effects during the construction of the high-rise buildings such as interaction between structures and surrounding soils and their stiffness. However, it is common in the finite element analyses of deep excavations that the employed soil model parameter values calibrated by the conventional test apparatuses resulted in overestimated displacement values compared with the measured ones at site. Back analyses of the construction of a deep excavation of VICEM building, Cau Giay, Hanoi were implemented using finite element Plaxis software. The analysis results revealed as follows: i) when the simulated horizontal displacement values of the diaphragm wall were close to the measured ones, the vertical Young’s moduli could be equal to 3000 N for the sandy soil and 3500 N for the clayey soil of the site, where N being the SPT number, and the unload-reload modulus being equal to 5 times the first loading Young’s modulus, ii) Effect of the unload-reload modulus on the horizontal displacement of diaphragm wall was significant, especially during the initial period of construction.
Effect of Deep Excavation on Deformation of Diaphragm Wall and Adjacent Structures
With the rapid urbanization in Hanoi, effect of the construction of deep excavations on their adjacent buildings has been a pressing issue, mainly related to the soil displacements. Finite element method is a powerful tool to consider many effects during the construction of the high-rise buildings such as interaction between structures and surrounding soils and their stiffness. However, it is common in the finite element analyses of deep excavations that the employed soil model parameter values calibrated by the conventional test apparatuses resulted in overestimated displacement values compared with the measured ones at site. Back analyses of the construction of a deep excavation of VICEM building, Cau Giay, Hanoi were implemented using finite element Plaxis software. The analysis results revealed as follows: i) when the simulated horizontal displacement values of the diaphragm wall were close to the measured ones, the vertical Young’s moduli could be equal to 3000 N for the sandy soil and 3500 N for the clayey soil of the site, where N being the SPT number, and the unload-reload modulus being equal to 5 times the first loading Young’s modulus, ii) Effect of the unload-reload modulus on the horizontal displacement of diaphragm wall was significant, especially during the initial period of construction.
Effect of Deep Excavation on Deformation of Diaphragm Wall and Adjacent Structures
Lecture Notes in Civil Engineering
Duc Long, Phung (Herausgeber:in) / Dung, Nguyen Tien (Herausgeber:in) / Nam, Nguyen Hong (Autor:in) / Dung, Nhu Van (Autor:in)
29.11.2019
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Effect of Diaphragm Wall Stiffness for a Deep Excavation on Adjacent Tunnel Deformation
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