Effects of cyclic confining pressure on the deformation characteristics of natural soft clay

Sun, Lingyan; Gu, Chunxing; Wang, Peng

doi:10.1016/j.soildyn.2015.07.010

Cited by 68 publications

(18 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is confronted by the Uzan-Witczak model. The results of the Uzan-Witczak resilient modulus M r was calculated based on Equation (2). The result show that the resilient modulus calculated based on Equation (8) The results of resilient modulus calculation also shows that if we consider a 10% error level for M r estimation, in almost all cases the resilient modulus is in this range.…”

Section: Analytical Model For M R Calculationmentioning

confidence: 86%

“…This is confronted by the Uzan-Witczak model. The results of the Uzan-Witczak resilient modulus Mr was calculated based on Equation (2). The result show that the resilient modulus calculated based on Equation (8) The resilient modulus was calculated from Equation (8).…”

Section: Analytical Model For M R Calculationmentioning

confidence: 97%

“…Nevertheless, soft cohesive subgrade soils, even under low loading conditions and after improvement, still develop some deformations [2].…”

Section: Introductionmentioning

confidence: 99%

“…The deformation of soils under dynamic and cyclic loading conditions is important to study [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Resilient Modulus Characterization of Compacted Cohesive Subgrade Soil

et al. 2017

View full text Add to dashboard Cite

Soil investigations concerning cyclic loading focus on the evaluation, in particular, of design parameters, such as elastic modulus, Poisson's ratio, or resilient modulus. Structures subjected to repeated loading are vulnerable to high deformations, especially when subgrade soils are composed of cohesive, fully-saturated soils. Such subgrade soils in the eastern part of Europe have a glacial genesis and are a mix of sand, silt, and clay fractions. The characteristic of, e.g., Young modulus variation and resilient modulus from repeated loading tests, is presented. Based on performed resonant column and cyclic triaxial tests, an analytical model is proposed. The model takes into consideration actual values of effective stress p , as well as loading characteristics and the position of the effective stress path. This approach results in better characterization of pavement or industrial foundation systems based on the subgrade soil in undrained conditions. The recoverable strains characterized by the resilient modulus M r value in the first cycle of loading was between 44 MPa and 59 MPa for confining pressure σ' 3 equal to 45 kPa, and between 48 MPa and 78 MPa for σ' 3 equal to 90 kPa. During cyclic loading, cohesive soil, at first, degrades. When pore pressure reaches equilibrium, the resilient modulus value starts to increase. The above-described phenomena indicate that, after the plastic deformation caused by excessive load and excess pore water pressure dissipation, the soil becomes resilient.

show abstract

Section: Analytical Model For M R Calculationmentioning

confidence: 86%

“…This is confronted by the Uzan-Witczak model. The results of the Uzan-Witczak resilient modulus Mr was calculated based on Equation (2). The result show that the resilient modulus calculated based on Equation (8) The resilient modulus was calculated from Equation (8).…”

Section: Analytical Model For M R Calculationmentioning

confidence: 97%

See 2 more Smart Citations

Resilient Modulus Characterization of Compacted Cohesive Subgrade Soil

et al. 2017

View full text Add to dashboard Cite

show abstract

“…It has the characteristics of high water content, large void ratio, and low water permeability. Therefore, the reinforcement of this soft clay foundation is a technical problem in the engineering field [1][2][3]. The interaction of the structural characteristics of the soil constituents is the main object of the study.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of 3D Reconstruction Parameters of Multi-Materialsin Soft Clay

Liu

Song

Yang

et al. 2018

JMSE

View full text Add to dashboard Cite

The results of the three-dimensional reconstruction of soil were derived from the X-ray absorption coefficient of the material itself. However, the absorption coefficient is not a fixed value, and is related to densities, chemical molecular weight, and the weight percentages of chemical components. How to accurately obtain the density of one component is a vital issue in multi-materials. In this study, the influence of the physical parameters of each component in the data-constrained modeling (DCM) of the microstructure of soft clay was investigated. The results showed that density changes were more prominent. A reasonable multi-component density was calculated, and the density of organic matter had a significant effect on the volume percentage of three-dimensional soft clay. In the clay mineral montmorillonite, the density significantly affected the volume percentage data, which directly limited the accuracy of the material distribution analysis. Based on this, other physical parameters of each component in the data constraint model could be further explored. Based on the density value of the simple material, a reasonable multi-materials density was calculated, which provides a quantitative method for the evolution analysis of soil structure.

show abstract