Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Finite Element Analysis of a Deep Excavation Adjacent to the Ben Thanh—Suoi Tien Metro Tunnels
The deep basement of a high-rise building which is constructed by using the semi top-down construction method located closely adjacent to bored tunnel segments of Ho Chi Minh City Urban Railway Construction Project between Opera House Station and Ba Son Station. In order to predict the effect of the excavation to existing metro tunnels, the finite element analysis is usually used for analysis of this type of complex problem. In this study both 3D and 2D finite element analysis are carried out for the excavation. However, 2D models are the plane strain simulation so it does not accurately describe the actual excavations as 3D models. Especially, in 3D models, the “three-dimensional effect” or the “corner effect” is considered and it results in a reduction of ground movement near the corners of the excavation due to the stiffening effects of the corners. With comparisons between these two types of finite element analyses, this study proves the benefits of the 3D analysis for an economical engineering design. Furthermore, this research also focus on the displacement of the tunnels. By using the “T-panels” and cement deep mixing (CDM) method for the excavation, the total displacement of the tunnels were successfully controlled within 15.0 mm and the deferential movement in any plane was less than 1/1000.
Finite Element Analysis of a Deep Excavation Adjacent to the Ben Thanh—Suoi Tien Metro Tunnels
The deep basement of a high-rise building which is constructed by using the semi top-down construction method located closely adjacent to bored tunnel segments of Ho Chi Minh City Urban Railway Construction Project between Opera House Station and Ba Son Station. In order to predict the effect of the excavation to existing metro tunnels, the finite element analysis is usually used for analysis of this type of complex problem. In this study both 3D and 2D finite element analysis are carried out for the excavation. However, 2D models are the plane strain simulation so it does not accurately describe the actual excavations as 3D models. Especially, in 3D models, the “three-dimensional effect” or the “corner effect” is considered and it results in a reduction of ground movement near the corners of the excavation due to the stiffening effects of the corners. With comparisons between these two types of finite element analyses, this study proves the benefits of the 3D analysis for an economical engineering design. Furthermore, this research also focus on the displacement of the tunnels. By using the “T-panels” and cement deep mixing (CDM) method for the excavation, the total displacement of the tunnels were successfully controlled within 15.0 mm and the deferential movement in any plane was less than 1/1000.
Finite Element Analysis of a Deep Excavation Adjacent to the Ben Thanh—Suoi Tien Metro Tunnels
Lecture Notes in Civil Engineering
Reddy, J. N. (Herausgeber:in) / Wang, Chien Ming (Herausgeber:in) / Luong, Van Hai (Herausgeber:in) / Le, Anh Tuan (Herausgeber:in) / Vinh, Le Ba (Autor:in) / Hoang, Ngoc Trieu (Autor:in) / Thao, Hoang The (Autor:in) / Hai, Hoang Long (Autor:in)
28.07.2020
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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