Centrifuge modeling of differential settlement and levee stability due to staged construction of enlarged embankment

Jin, Seok Woo; Choo, Yun Wook; Kim, Young Muk; Kim, Dong Soo

doi:10.1007/s12205-014-0218-7

Cited by 10 publications

(7 citation statements)

References 5 publications

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“…It is observed from Figures 14,15,18,19,22 and 23 that the post-yield strains (ε post ) are 3 to 14, 3.3 to 19.2, and 2.7 to 13.7 times higher in the loading phase and 4.7 to 15.9, 3.4 to 21, and 2 to 14 times higher in the unloading phase when compared with the pre-yield strains (ε pre ) for PMT, TXL, and CRS tests, respectively.…”

Section: Methodsmentioning

confidence: 83%

“…It is necary to study the changes in the profiles of dry density, moisture, and the PI of clay for design of embankments. Previous studies [6,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]64] on the failure of embankments explored the extent of t-failure movement of the toe and the settlement of apex of embankments in the case ery soft to soft clays due to pressure exerted by the increase in height of the embanknt. Previous studies did not compare the loading and unloading behaviors of clay in same test.…”

Section: Methodsmentioning

confidence: 99%

“…The prediction of embankment settlement is significant for stability [18]. Consolidation behavior of soft clay under embankment is critical [19]. The soft sub-soils under the embankments are critical for stability [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of Post-Yield Strain from Loading and Unloading Phases of Pressuremeter, Triaxial, and Consolidation Test Curves for Sustainable Embankment Design

et al. 2022

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Exponential development of post-yield strain (Ԑpost) is a pivotal indicator of failure in embankments constructed on soft saturated clays. This paper characterizes saturated clay stratum comprising very soft to very stiff stratigraphy, with plasticity index (PI) ranging from 19% to 31%, by performing widely used geotechnical engineering tests, i.e., the prebored pressuremeter (PMT) test, the triaxial (TXL) test, and constant-rate-of-strain (CRS) consolidation. PMT, TXL, and CRS tests were performed at a strain rate range of 0.18%/min to 0.21%/min to explore the yield stress (σ′y), the pre-yield strain (Ԑpre), and the post-yield strain (Ԑpost). Results indicate that Ԑpost/Ԑpre for PMT, TXL, and CRS stress–strain curves range from 2.7 to 19 in the loading phase and 2 to 21 in the unloading phase. An exponential increase in Ԑpost/Ԑpre is observed in the range of 10 to 21 for very soft to soft clay which is congruent with the realistic sustainable range of 4 to 30 for embankment failure on soft clays worldwide. The evaluated Ԑpost/Ԑpre can be applied for sustainable prediction of post-failure evolution of strains in embankments on soft clays. Simplistic correlations are developed for approximation and prediction of Ԑpost as a function of σ′y, Ԑpre and maximum applied pressure (Pmax) for loading and unloading phases with reasonable accuracy. The intuitive zone of critical ℇpost is quantified for impending failure in embankments for maximum applied pressure (Pmax), ranging from 36 kPa to 100 kPa for very soft to soft clay for use in sustainable embankment design and construction. Variation in predicted versus measured results of an individual site is observed to be within ±10% of line of equality.

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Section: Methodsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of Post-Yield Strain from Loading and Unloading Phases of Pressuremeter, Triaxial, and Consolidation Test Curves for Sustainable Embankment Design

et al. 2022

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“…At present, settlement prediction [1,2] has been studied by many engineers in structures such as tunnels [3,4], high-speed railways [5,6], bridges [7,8], and levees [9,10]. In general, settlement prediction methods can be divided into two categories: Numerical calculations and deducing methods based on field data.…”

Section: Introductionmentioning

confidence: 99%

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Lan

Wang

2018

Applied Sciences

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Owing to the pavement cracking of heightening and thickening levees (HTL) caused by differential settlement, it is necessary to study the settlement prediction and differential settlement criterion for HTLs. In this study, an HTL was taken as the study object. First, leveling observation and layered settlement observation were adopted, and a generalized settlement prediction model (GSPM) that can describe both S-shaped and hyperbolic settlement–time curves was proposed. The physical meanings of GSPM parameters were analyzed. Moreover, the effectiveness of the GSPM was verified using field monitoring data. Second, finite element analysis based on a viscoelastic constitutive model was used to reveal the quantitative relationship between the differential settlement and horizontal stress of the pavement. On this basis, the differential settlement criterion was obtained. The results showed that the GSPM can unify the logistic model and hyperbolic model by introducing two morphological change parameters. In addition, the GSPM can be more widely used, more accurate, and more stable than the traditional logistic model and hyperbolic model. When an asphalt concrete pavement (whose ultimate tensile stress is 0.12 MPa) is used, the corresponding differential settlement criterion is approximately 4.3 cm. The research results can provide a reference for reasonable differential settlement control for HTLs in order to prevent pavement cracking.

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“…During the process of adding a new embankment to the existing embankment, additional stresses and deformations can develop under both the new and existing embankments [1,2]. Differential settlement often occurs between and within the widened portion and the existing embankments [3,4]. After construction for widening the embankment, pavement damage may occur due to differential settlement, such as longitudinal cracks or drop-off of pavement sections [5][6][7][8], especially during the operational period of the road.…”

Section: Introductionmentioning

confidence: 99%

Field Test and Numerical Simulation for Coordinated Deformation of New Subgrade and Old Embankment Adjacent to River

et al. 2018

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With the development of the economy in China, original roads may be unable to cope with the existing traffic. The expansion of the old embankment is the core problem for road expansion. Soft foundation differential settlements and pavement cracking along the joint between the new subgrade and old embankment often emerge after construction, especially during the operational period of the road. The Binjiang Avenue Project in Nanjing, China, is taken as a research example in this paper, and a typical test zone of about 300.0 m in length was selected to conduct research work through in-situ tests. The coordinated deformations of the subgrade combined with the old embankment under conditions of consolidation by drainage were researched using in-situ tests and numerical modeling. During the process of numerical modeling, the vertical drainage system in the compressible soft ground layers was simplified to be represented as the drainage band model and the equivalent sand-wall model. In addition, a soft ground creep model was adopted to calculate the deformation of the subgrade with the construction process. A comparison of the results between field tests and numerical simulations was carried out. The results show that there is good uniformity for both. Based on the results, three indexes for the new and old subgrade, such as the differential settlement, total settlement and post-settlement, should be viewed as the basis for the design and construction of the new subgrade and old embankment. Additionally, it was found that the soft ground model, drainage band model and equivalent sand-wall model are all completely suitable for the numerical modeling of the soft ground reinforcement subgrade. These results also provide a theoretical basis for the construction method of similar projects.

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Centrifuge modeling of differential settlement and levee stability due to staged construction of enlarged embankment

Cited by 10 publications

References 5 publications

Prediction of Post-Yield Strain from Loading and Unloading Phases of Pressuremeter, Triaxial, and Consolidation Test Curves for Sustainable Embankment Design

Prediction of Post-Yield Strain from Loading and Unloading Phases of Pressuremeter, Triaxial, and Consolidation Test Curves for Sustainable Embankment Design

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Field Test and Numerical Simulation for Coordinated Deformation of New Subgrade and Old Embankment Adjacent to River

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