Ground Settlements Due to Quad Water Tunnel Construction

Authors

Marawan M. Shahien M. Shahein, Prof. of Geotechnical Engineering, Faculty of Engineering, Tanta University, EgyptFollow
Ehab Ahmed Khalil E.Khalil, Professor of structural Engineering, National Water Research Center, Ministry Of Water Resources and IrrigationFollow
Ahmed F. Abd El Kader A. Abd El Kader, Prof. of Geotechnical Engineering, Faculty of Engineering, Tanta University, EgyptFollow
mahmoud abdulnasser hodeab M.A.Nasser, Researcher at Structural Engineering Department, Faculty of Engineering, Tanta University, EgyptFollow

Abstract

Construction of a tunnel under an existing one poses significant geotechnical challenges due to the potential surface and subsurface settlements caused by the new tunnel construction and its impact on the existing tunnel, adjacent buildings, and facilities. The complexity intensifies when multiple adjacent tunnels need to be constructed, such as twin, triplet, quad, or more, as the construction of each tunnel affects the others. This interaction depends on various factors, including the horizontal distance between each tunnel (pillar width), the tunnel's depth and vertical position relative to the existing tunnel (pillar depth), and their influence on surface and subsurface settlement values.

This research focuses on a numerical investigation of the construction of a new quad water tunnel beneath one of the existing siphon water tunnels in the city of Minya, Arab Republic of Egypt. The existing siphon water tunnel plays a crucial role in conveying water from an agricultural drain beneath important infrastructure, such as the Cairo-Aswan railway line and the Cairo-Aswan agricultural road. The study aims to predict the induced settlements and their effects using a proposed model that positions the quad tunnels side by side in a horizontal arrangement. The investigation includes analyzing different construction sequences and identifying the optimal sequence that minimizes settlement values.

Recommended Citation

Shahien, Marawan M. M. Shahein; Khalil, Ehab Ahmed E.Khalil; Abd El Kader, Ahmed F. A. Abd El Kader; and hodeab, mahmoud abdulnasser M.A.Nasser (2023) "Ground Settlements Due to Quad Water Tunnel Construction," Journal of Engineering Research: Vol. 7: Iss. 6, Article 8.
Available at: https://digitalcommons.aaru.edu.jo/erjeng/vol7/iss6/8