Tunnel Analysis of Dhaka Subway using PLAXIS 2D Considering Building Loads of Pile Foundation
Date
2023-05-30
Journal Title
Journal ISSN
Volume Title
Publisher
Department of Civil and Environmental Engineering(CEE), Islamic University of Technology(IUT), Board Bazar, Gazipur-1704, Bangladesh
Abstract
To ease the increasing traffic in the city, an underground Dhaka metro system is being
planned. Ground movement and surface settlement must get special consideration during the
planning of the subway due to the city's high level of congestion. For the long-term design of
the tunnel, it is also necessary to take into account the increase in building density as the city
expands. Utilizing Plaxis 2D, a 2D finite element analysis was performed for this project.
Different soil profiles representing various parts of the Central Dhaka city were taken into
consideration, and the surface settlement brought on by tunnel excavation was looked at. It
was discovered that as tunnel excavation depth grows, surface settlement diminishes and the
settlement trough widens. Additionally, the axial forces and grouting pressure needed for a
particular surface settlement after the tunnel was built were analyzed, and it was shown that
both of these requirements rise with tunnel depth. Additionally, an analysis of the tunnel
lining stresses under various groundwater conditions was done. It was discovered that the
axial forces the tunnel lining experiences increase with tunnel depth. Additionally, the future
rise in ground water level will primarily cause an increase in the axial forces, bending
moments, and shear forces.
Description
Supervised by
Dr. Hossain Md. Shahin,
Professor,
Department of Civil and Environmental Engineering (CEE)
Islamic University of Technology (IUT)
Board Bazar, Gazipur, Bangladesh
Keywords
Dhaka Subway, Tunnel, Surface settlement, Settlement trough, Ground behavior, Finite Element Analysis, Plaxis 2D, Lining stresses
Citation
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