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Abd El-Naiem, M., Abo El-Wafa Mohamed, W. (2007). BEHAVIOR OF EXISTING TUNNEL DUE TO THE CONSTRUCTION OF A NEW TUNNEL PASSED PARALLEL UNDER IT. JES. Journal of Engineering Sciences, 35(No 6), 1381-1400. doi: 10.21608/jesaun.2007.114576
Mostafa Abdou Abd El-Naiem; Waleed Abo El-Wafa Mohamed. "BEHAVIOR OF EXISTING TUNNEL DUE TO THE CONSTRUCTION OF A NEW TUNNEL PASSED PARALLEL UNDER IT". JES. Journal of Engineering Sciences, 35, No 6, 2007, 1381-1400. doi: 10.21608/jesaun.2007.114576
Abd El-Naiem, M., Abo El-Wafa Mohamed, W. (2007). 'BEHAVIOR OF EXISTING TUNNEL DUE TO THE CONSTRUCTION OF A NEW TUNNEL PASSED PARALLEL UNDER IT', JES. Journal of Engineering Sciences, 35(No 6), pp. 1381-1400. doi: 10.21608/jesaun.2007.114576
Abd El-Naiem, M., Abo El-Wafa Mohamed, W. BEHAVIOR OF EXISTING TUNNEL DUE TO THE CONSTRUCTION OF A NEW TUNNEL PASSED PARALLEL UNDER IT. JES. Journal of Engineering Sciences, 2007; 35(No 6): 1381-1400. doi: 10.21608/jesaun.2007.114576

BEHAVIOR OF EXISTING TUNNEL DUE TO THE CONSTRUCTION OF A NEW TUNNEL PASSED PARALLEL UNDER IT

Article 2, Volume 35, No 6, November and December 2007, Page 1381-1400  XML PDF (1.25 MB)
Document Type: Research Paper
DOI: 10.21608/jesaun.2007.114576
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Authors
Mostafa Abdou Abd El-Naiem* ; Waleed Abo El-Wafa Mohamed
Lecturer, Civil Eng. Department, Faculty of Eng., Assiut University, Assiut, Egypt
Abstract
The study of the behavior of existing underground structures, such as transportation tunnels, due to construction of a new tunnel is an engineering problem of soil-structure interaction. Many problems arise when parts of a new construction tunnel cross under, or near an existing tunnel during the construction. One of these problems is expected to occur related to soil stability around a new construction tunnel and between new and an existing one. Even though in engineering practice tunnels are often designed considering only static or quasi static (creep), loading conditions, a non-negligible research effort has been devoted to investigate their behavior in near-field construction conditions. In the present study, the behavior of existing tunnels under passed by a new construction one by using Finite Element Method has been studied. The tunnel lining is meshed with two dimensional elements, called BEAM 6 element. The soil is meshed with two dimensional elements called LST, (Linearly Varying Strain Triangular Element. In this study, the main parameters were taken into consideration are excavated tunnel diameter (D2), soil thickness between tunnels (H), and horizontal distance (X). The results obtained from this study were compared with the initial values obtained from case of no tunneling under the existing tunnel.
Keywords
Tunnel; Soil-structure interaction; Finite Element Method; Stresses; Forces; deformation; Construction
Main Subjects
Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.
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