Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14941
Title: An embedded improved soil berm in an excavation - mechanisms and capacity
Authors: ZHANG YAODONG
Keywords: Excavation, soft soil, improved soil berm, upper bound, centrifuge, Particle Image Velocimetry
Issue Date: 19-Nov-2005
Source: ZHANG YAODONG (2005-11-19). An embedded improved soil berm in an excavation - mechanisms and capacity. ScholarBank@NUS Repository.
Abstract: For a wide excavation in soft soil, the excavation could be stabilised by an embedded improved soil berm to control the excessive soil movement. However, the behaviour of such a stabilised excavation is still not well understood and the design method for an embedded improved soil berm is mainly empirical. Analytical, centrifuge, and numerical studies are therefore carried out to improve the understanding of the above problem. A modified upper bound solution is first developed to estimate the undrained end bearing capacity of an improved soil berm during the process of excavation. Then a series of centrifuge tests with different soil improvement configurations are performed. A relatively new image processing technique called Particle Image Velocimetry is incorporated to measure ground movements and help to examine the mechanism involved. Finally a numerical analysis is conducted to complement the results of centrifuge tests.
URI: http://scholarbank.nus.edu.sg/handle/10635/14941
Appears in Collections:Ph.D Theses (Open)

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