Stress Sharing Behavior and Its Mechanism during Consolidation Process in Composite Ground Improved by Sand Compaction Piles with Low Replacement Area Ratio

The sand compaction pile (SCP) method is a widely used ground-improvement technique, especially in soft marine clay. Effects of the SCP method on soil improvement are often assessed using the stress concentration ratio, but previous studies have produced conflicting results of stress concentration ratio. The authors employed a finite-element model, with Modified Cam-Clay model, to analyze the consolidation behavior of SCP composite and evaluated the stress concentration ratio. Based on the results of parametric studies, it is concluded that the use of a stress concentration ratio of 3 is reasonable and conservative regarding the strength of the composite. New equations for the settlement reduction factor were developed, and these provide reasonable prediction when stress concentration ratio of 3 is used.

show abstract

“…(a3) Murayama (1962), Ibaraki (1965), Mokami et al (1968), Yamaguchi and Murakami (1977), Hong (2003), You (2003).…”

Section: Numerical Modelmentioning

confidence: 99%

“…(b3) Jung (1999), Kim (2001). (c1) Van Impe and De Beer (1983), Jung (1999), Kim (2001), Hong (2002), Hong (2003), You (2003), Kim (2003), Lee et al (2003).…”

Section: Numerical Modelmentioning

confidence: 99%

Consolidation Behavior and Stress Concentration Ratio of SCP Composite Ground

Ahn

Kim

2012

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

show abstract

“…Recently, as the serviceability problem by the settlement or the displacement has been recognized as one of the key issues for the embankment on soft clays, comprehensive understanding on the deformation characteristics on the soft clay reinforced with the SCPs is required to analyze the overall behavior of the embankment. Most of the previous researches have been mainly focused on the overall behaviors of the SCP-improved ground, such as the load distribution or the settlement behaviors of the SCP-improved ground, with less emphasis on the stiffness of the SCP-improved ground (Alamgir et al, 1996;Kimura et al, 1991;Rahman et al, 2000;You et al, 2006;Weber and Laue, 2006). Since the stiffness of the SCP-improved ground directly affects the serviceability and stability of the embankment, insightful understanding on the stiffness of the SCP-improved ground becomes important to analyze the behavior of SCP-improved ground.…”

Section: Introductionmentioning

confidence: 97%

Stiffness Nonlinearities of SCP-inserted Clay Specimens with Various Replacement Ratios in Triaxial Compression Tests

Choo¹,

Baek²,

Cho³

et al. 2013

Geo-Congress 2013

View full text Add to dashboard Cite

The sand compaction pile (SCP) method is one of the widely used ground improvement techniques for the embankment constructed on the soft clay. The behavior of SCP-improved ground becomes very complex due to the differences in the stiffness and strength of the SCP and the original soft ground. Since the behavior of the SCP-improved ground greatly affects the performance of the embankment, it is crucial to understand the mechanical behavior of the SCP-improved ground under the field conditions. Thus, in this study, triaxial compression tests after K 0 consolidation are performed on the SCP-inserted clay specimens to characterize the stiffness nonlinearity for the SCP-improved ground. Based on the stress-strain behaviors of SCP-inserted clay specimens with different replacement ratios, the secant Young's modulus is obtained with strain level. The initial stiffness value and stiffness degradation patterns are greatly affected by the replacement ratio showing similar trends with those of the major component of the SCP-inserted clay specimen.

show abstract

Numerical and centrifugal physical modelling on soft clay improved with floating and fixed sand compaction piles

Yadav

Khalid

et al. 2019

Computers and Geotechnics

View full text Add to dashboard Cite

Stress Sharing Behavior and Its Mechanism during Consolidation Process in Composite Ground Improved by Sand Compaction Piles with Low Replacement Area Ratio

Cited by 6 publications

References 1 publication

Consolidation Behavior and Stress Concentration Ratio of SCP Composite Ground

Consolidation Behavior and Stress Concentration Ratio of SCP Composite Ground

Stiffness Nonlinearities of SCP-inserted Clay Specimens with Various Replacement Ratios in Triaxial Compression Tests

Numerical and centrifugal physical modelling on soft clay improved with floating and fixed sand compaction piles

Contact Info

Product

Resources

About