Impact of Neighbouring
Excavation on Diaphragm Wall under Seismic Loading
Sneha Suruchi, Abbas Syed Mohammad and Sahu A.K.
Disaster Advances; Vol. 18(1); 12-18;
doi: https://doi.org/10.25303/181da012018; (2025)
Abstract
The existing diaphragm walls may be affected by the new structure as well as any
excavation work required for the surrounding projects. During an earthquake, this
effect can be more pronounced. It is therefore, suggested to create the diaphragm
wall and the neighbouring excavation models with the intention of researching the
influence of excavation upon diaphragm wall under dynamic conditions. For the investigation,
a case study involving a diaphragm wall located in Noida was taken into account.
The diaphragm wall and nearby excavation were modelled utilizing the Plaxis 3D program.
By altering the space between the excavation and the diaphragm wall and entering
the time-history acceleration data from an earlier earthquake, it was possible to
examine the impact of the nearby excavation for the new construction on the diaphragm
wall under dynamic conditions. The outcomes of three-dimensional numerical analysis
were compared.
The study has revealed that the wall's horizontal displacement increases with increasing
the space between the wall and the excavation until it arrives at an approximate
value that resembles the wall's horizontal deflection without nearby excavation.
Graphs of shear force and bending moment were also compared and similar variations
were found.
