Numerical Analysis of Pile wall for Excavation Support in Soft Ground
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I.O.E. Pulchowk Campus
Abstract
Cantilever pile walls are a type of earth support structure that can provide advantages
in minimizing excessive deformation during ground excavation. In multiple scenarios,
the construction of basements for new buildings or structures is planned in close
proximity to existing older buildings. In such instances, the surrounding area of the old
building, known as the influence zone, exerts lateral earth pressure onto the newly
excavated area. To withstand and contain this lateral earth pressure, a cantilever pile
wall is constructed. Kathmandu, the capital and most populous city of Nepal, is
characterized by buildings constructed on soft ground consisting of grey to dark silty
clay and clayey silt. As the city moves towards the development of high-rise buildings,
it becomes crucial to ensure proper excavation without causing any damage to the
existing buildings in close proximity to the construction site. Therefore, well-designed
cantilever piles are being studied using finite element analysis, considering both 2D
and 3D modeling techniques. The objective is to analyze and design effective cantilever
pile systems that can accommodate the requirements of the upcoming high-rise
developments while safeguarding the nearby structures. The resulting straining effects,
such as bending moments, shear forces, normal forces, and lateral support forces, can
vary between 2D and 3D analyses. Additionally, the deformation of the wall and the
subsidence profile may differ when comparing 2D and 3D analyses.
Description
Cantilever pile walls are a type of earth support structure that can provide advantages
in minimizing excessive deformation during ground excavation. In multiple scenarios,
the construction of basements for new buildings or structures is planned in close
proximity to existing older buildings.