Research-oriented ground investigation projects at Changi, Singapore

Abstract

The Changi East Reclamation projects in Singapore were implemented in five phases starting from 1991 and completed in 2005. Due to the excessive magnitude of settlement likely to occur over a long period of duration caused by the consolidation process, an extensively large area was required to be improved using ground improvement techniques to accelerate the consolidation process. The planning and implementation of site investigation works for land reclamation projects is discussed in this paper. An accurate and extensive geotechnical characterisation of underlying soft compressible marine clay was undertaken as part of this project. The geotechnical characterisation was undertaken using site investigation, specialised laboratory testing and specialised in situ testing. Correlations were obtained using empirical methods, which will be useful for future use such as correlations between classification parameters as well as specialised in situ test parameters and strength and compressibility parameters of Singapore marine clay at Changi, Singapore. This paper presents how the research-oriented ground investigation projects were implemented for this mega land reclamation project in the Republic of Singapore.

Yield criteria for glaciotectonically deformed deposits

“…However, such a test should allow defining the unconfined compressive strength for different orientations of soil samples in the ground so that the effect of inherent anisotropy in the form of cracks, layers or discontinuities can be investigated. Modern soil sampling and rock coring techniques (e.g., block samples, large diameter oil-operated samplers, rotary sidewall coring) and subsequent coring in the laboratory must be used in order to achieve very good quality samples for subsequent laboratory testing (Agarwal et al 2014;ASTM D2113-14, 2014Bo et al 2017;BS EN ISO 22475-1, 2006;Chung et al 2014;Gylland et al 2014;Long et al 2010).…”

Inverse-analysis of Compressibility Parameters for Fine-grained Soils in GTA

“…The study conducted by Sridharan, and Nagaraj (2000) summarised the available equations for compression index of different soils and shown in In addition, Bo et al (2017) suggested correlations of compressibility index for Singapore marine clays as follows. 2019) performed FEM of the oedometer test using PLAXIS 2D program to assess the stress-strain response of medium-dense sand.…”