Non-linear Consolidation of Soil with Vertical and Horizontal Drainage under Time-Dependent Loading

Geng, Xueyu

doi:10.1109/icacte.2008.216

Cited by 9 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. At the same time (t), U p is always less than U s , which is similar to the one-dimensional, non-linear, small-strain consolidation obtained by Geng et al (2006), Geng (2008 and Cai & Geng (2009). This also shows that the degree of consolidation calculated based on U s occurs at a slightly higher rate than the degree of consolidation calculated based on U p .…”

Section: Boundary and Initial Conditionssupporting

confidence: 56%

A large-strain radial consolidation theory for soft clays improved by vertical drains

Geng

2017

Géotechnique

102

View full text Add to dashboard Cite

A system of vertical drains with combined vacuum and surcharge preloading is an effective solution for promoting radial flow, accelerating consolidation. However, when a mixture of soil and water is deposited at a low initial density, a significant amount of deformation or surface settlement occurs. Therefore, it is necessary to introduce large-strain theory, which has been widely used to manage dredged disposal sites in one-dimensional theory, into radial consolidation theory. A governing equation based on Gibson's large-strain theory and Barron's free-strain theory incorporating the radial and vertical flows, the weight of the soil, variable hydraulic conductivity and compressibility during the consolidation process is therefore presented.

show abstract

Section: Boundary and Initial Conditionssupporting

confidence: 56%

A large-strain radial consolidation theory for soft clays improved by vertical drains

Geng

2017

Géotechnique

102

View full text Add to dashboard Cite

show abstract

“…This result is consistent with the previous study by Geng and Yu (2017) in the large-strain theory. For non-linear consolidation in the small-strain theory, Cai and Geng Geng (2008) also showed that at the same time, the degree of consolidation based on U p is always less than that based on U s .…”

Section: Difference Of Consolidation Degree In Terms Of Settlements and Excess Pore Water Pressurementioning

confidence: 97%

Large-strain consolidation analysis of PVD-installed soft soil considering the discharge capacity variation according to depth and time

Nguyen

Pradhan

Nguyen

et al. 2020

View full text Add to dashboard Cite

Purpose The consolidation behavior of prefabricated vertical drain (PVD)-installed soft deposits mainly depends on the PVD performance. The purpose of this study is to propose a numerical solution for the consolidation of PVD-installed soft soil using the large-strain theory, in which the reduction of discharge capacity of PVD according to depth and time is simultaneously considered. Design/methodology/approach The proposed solution also takes into account the general constitute relationship of soft soil. Subsequently, the proposed solution is applied to analyze and compare with the monitoring data of two cases, one is the experimental test and another is the test embankment in Saga airport. Findings The results show that the reduction of PVD discharge capacity according to depth and time increased the duration required to achieve a certain degree of consolidation. The consolidation rate is more sensitive to the reduction of PVD discharge capacity according to time than that according to the depth. The effects of the reduction of PVD discharge capacity according to depth are more evident when PVD discharge capacity decreases. The predicted results using the proposed numerical solution were validated well with the monitoring data for both cases in verification. Research limitations/implications In this study, the variation of PVD discharge capacity is only considered in one-dimensional consolidation. However, it is challenging to implement a general expression for discharge capacity variation according to time in the two-dimensional numerical solution (two-dimensional plane strain model). This is the motivation for further study. Practical implications A geotechnical engineer could use the proposed numerical solution to predict the consolidation behavior of the drainage-improved soft deposit considering the PVD discharge capacity variation. Originality/value The large-strain consolidation of PVD-installed soft deposits could be predicted well by using the proposed numerical solution considering the PVD discharge capacity variations according to depth and time.

show abstract

“…Step and ramp loading cases are considered by Leo (2004) and closed-form analytical solutions of consolidation are developed considering the effects of both vertical and radial drainage in a fully coupled fashion. Geng (2008) presented a non-linear theory for sand drain consolidation under time dependent loading considering the variations of compressibility and permeability. Conte and Troncone (2009) presented an analytical solution for radial consolidation with vertical drains under general time-dependent loading by extending Barron's solution.…”

Section: Introductionmentioning

confidence: 99%

Non-linear consolidation with PVDs under ramp loading

Khan¹,

Madhav

Reddy³

2016

JGS Special Publication

View full text Add to dashboard Cite

The paper presents a theory of non-linear consolidation for radial flow of a clay deposit treated with PVDs considering linear void ratio-log effective stress relationship, constant coefficient of consolidation but with ramp or construction loading. The governing equation of consolidation is solved numerically by the finite difference method. Parametric study quantifies the effects of magnitude of surcharge load and construction time on the variations of degree of settlement and degree of dissipation of excess pore pressures with time. The maximum induced excess pore water pressure is sensitive to the construction time for a given surcharge load. The variation of degree of settlement is dependent on both applied load intensity and the construction time. While the rate of building up of pore pressure with time during the construction is almost independent of stress increment ratio, the dissipation rate is shown to be dependent on stress increment ratio.

show abstract

Non-linear Consolidation of Soil with Vertical and Horizontal Drainage under Time-Dependent Loading

Abstract: Abstract

Cited by 9 publications

References 10 publications

A large-strain radial consolidation theory for soft clays improved by vertical drains

A large-strain radial consolidation theory for soft clays improved by vertical drains

Large-strain consolidation analysis of PVD-installed soft soil considering the discharge capacity variation according to depth and time

Non-linear consolidation with PVDs under ramp loading

Contact Info

Product

Resources

About