Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/71425
Title: Earth pressure distribution in a braced excavation
Authors: Lim, Vuthy
Keywords: DRNTU::Engineering::Civil engineering::Geotechnical
Issue Date: 2017
Abstract: Apparent Pressure Diagram (APD) was used in many strutting system designs in the past. It provides good conservative estimate of pressure but not for economical designs. Finite Element Analysis (FEA) software packages are commonly used nowadays to produce more accurate result. In this parametric study, excavation in soft clay overlaying medium clay was simulated in staged construction using FEA software, Plaxis 2D, under plane strain analysis. Mohr-Coulomb with linearly elastic-perfectly plastic material model was used with 3 types of undrained shear strength increasing with depth. Three sheet pile walls and diaphragm walls were also used as parameter. Result of this study found factor of safety to be minimum 3.25 and maximum 3.75 for all cases studied. Compared with FEA, APD overestimates strut force by 2.2 times for the case with least strut force and 2.0 times for the most strut force. Reduction in soil-wall interface strength leads to higher strut loads, deflection and bending moment. Prestressing strut results in even more strut loads, which lowers factor of safety against APD to approximately 1.46.
URI: http://hdl.handle.net/10356/71425
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:CEE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
Lim Vuthy_FYP_final_print.pdf
  Restricted Access
2.76 MBAdobe PDFView/Open

Page view(s)

141
Updated on Jun 23, 2021

Download(s) 50

20
Updated on Jun 23, 2021

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.