Bored Soldier Pile Analysis and Design Practice in Addis Ababa (Case of 4B+G+6 Podium and 15 floors Assem Building)
No Thumbnail Available
Date
2022-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
The purpose of this research is to show the benefit of the Finite Element Method over
the Conventional Analysis Method for deep excavation design. This research is
conducted on the Assem Building excavation, which has a 4B+G+6 podium and 15
stories and is located in Addis Ababa, Ethiopia, and is surrounded by busy roads and
buildings. Following a comprehensive assessment of the literature on the analysis and
design of excavation support walls, specifically anchored soldier pile walls, FEA and
conventional analytic methods are used to model the excavation of the Assem Building.
In the conventional analysis approach, the Assem Building's excavation support walls
were analyzed and designed using the DeepEX software program and the GEO5
"Sheeting Check" software tool. Similarly, the FEA method uses the Plaxis 2D software
program. Similar model sizes and soil and structural element parameters are used
throughout all software programs.
The following result was achieved by analyzing the Assem Building excavation.
According to the FEA and optimized FEA results, the bending moments along the pile
length are 40 % and 36 % lower, respectively, than those found using conventional
analysis methods. Similarly, shear force calculated using FEA and optimized FEA are
41 % and 44 % lower, respectively, than those calculated using conventional analysis.
The conventional method makes considerable assumptions about the solutions, but the
FEA method makes no such assumptions and treats the problem as it is. As a result, the
FEM result is lower than that of the conventional method. Because of the lower results,
the FEA approach saves 9% to 11 % of the cost of the conventional analysis method.
The optimized FEA also results in a cost reduction of 14 to 15%.
Description
Keywords
Bored Soldier Pile Analysis, Design Practice, Addis Ababa