Secondary settlement estimation in surcharge preload subject to time effect of secondary consolidation coefficient

Ya-yuan, HU; Yang, Ping

doi:10.1007/s11771-017-3436-6

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For comparison, under different staged loadings, it is very clear from the graphs that the vertical strain rate depends on the applied vertical stress and on the soft soils layer models in terms of creep speed. The same observations were made by Qi et al [34], and Hu and Ping [37]. When analysing the results (see Figure 9), we can see that the development of axial strain during creep is closely related to the applied load.…”

Section: Vertical Strain-time Curvesupporting

confidence: 84%

“…The importance of this parameter stems from the fact that for some soils, the parameter indicates a nearly constant value for a given load increment [36]. This was the main reason, why numerous studies have been carried out by different researchers in order to compensate for the long-term behavior of the soil on civil engineering structures [29][30][31][32][33][34][35][36][37].…”

Section: Literature Review On Soft Soil Behaviourmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

Bezih¹,

Chateauneuf²,

Demagh³

2020

Civ Eng J

View full text Add to dashboard Cite

Lifetime service of Reinforced Concrete (RC) structures is of major interest. It depends on the action of the superstructure and the response of soil contact at the same time. Therefore, it is necessary to consider the soil-structure interaction in the safety analysis of the RC structures to ensure reliable and economical design. In this paper, a finite element model of soil-structure interaction is developed. This model addresses the effect of long-term soil deformations on the structural safety of RC structures. It is also applied to real RC structures where soil-structure interaction is considered in the function of time. The modeling of the mechanical analysis of the soil-structure system is implemented as a one-dimensional model of a spring element to simulate a real case of RC continuous beams. The finite element method is used in this model to address the nonlinear time behavior of the soil and to calculate the consolidation settlement at the support-sections and the bending moment of RC structures girders. Numerical simulation tests with different loading services were performed on three types of soft soils with several compressibility parameters. This is done for homogeneous and heterogeneous soils. The finite element model of soil-structure interaction provides a practical approach to show and to quantify; (1) the importance of the variability of the compressibility parameters, and (2) the heterogeneity soil behavior in the safety RC structures assessment. It also shows a significant impact of soil-structure interaction, especially with nonlinear soil behavior versus the time on the design rules of redundant RC structures. Doi: 10.28991/cej-2020-03091618 Full Text: PDF

show abstract

Section: Vertical Strain-time Curvesupporting

confidence: 84%

Section: Literature Review On Soft Soil Behaviourmentioning

confidence: 99%

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

Bezih¹,

Chateauneuf²,

Demagh³

2020

Civ Eng J

View full text Add to dashboard Cite

show abstract

“…Guo-Wei Li and Hu studied the effect of dynamic cyclic loading and surcharge preloading method on the settlement of low embankments and showed that the settlement increases with increasing amplitude of cyclic load and the effectiveness of surcharge preloading depends on the difference between the magnitude of surcharge and amplitude of the cyclic load and this is consistent with the energy concept [12][13][14].…”

Section: Consolidation Theory Based On the Energy Conceptmentioning

confidence: 67%

Effects of Dynamic Traffic Load Frequency on Consolidation Behavior of Soft Clay Under Low Embankment: Experimental and Numerical Investigation

Nguyen¹

2023

GEOMATE

View full text Add to dashboard Cite

Soft soil is widely distributed over coastal and riverside regions, where the embankment loads are sensitive for differential settlement. In a marine environment, dynamic loading forms a significant proportion of the loading and this decides the safety of many structures founded on the ocean bed. Low embankments may be subjected to dynamic loading in the form of traffic loads, earthquake forces, ocean wave loads, and wind loads. When dynamic cyclic loading is applied, the post-construction settlement of the embankment might increase significantly in comparison with that for static loading, depending upon the magnitude and frequency of the load and the nature of soft soil. This paper used a model of dynamic traffic load to study the effect of cyclic loading frequency on the consolidation behavior of soft clay under low embankments. The experimental results show that the consolidation deformation of the soil samples is independent of the frequency of the dynamic cyclic loading, which was simulated to follow the half-sine wave, and it is consistent with the classic theory of consolidation developed by Terzaghi.

show abstract

“…To control the rebound, Hu Yang suggests the final load should not be less than one-third of the surcharge load. The time for removal of the surcharge load is determined in such a way so that the degree of consolidation (U) is at least σsc/(σsc+σst) or typically 75%, where σsc and σ st represent the surcharge and structure load, respectively [17].…”

Section: Embankment On Soft Groundmentioning

confidence: 99%

Controlling the Settlement of the Low Embankment on Soft Ground by Surcharge Preloading Method

Nguyen¹

2023

GEOMATE

View full text Add to dashboard Cite

Preloading with surcharge is the most common technique of ground improvement used in highway engineering. At the end of the preloading period, the surcharge load is removed, and most or all of the primary settlement and some of the secondary settlement would have occurred. The soil beneath the embankment becomes over-consolidated, resulting in the elimination or a huge reduction in post-construction settlement. When pre-compression is applied to a relatively free-draining material, consolidation times are short, and therefore primary settlements can be effectively controlled by using a preload equal to the final load over a limited period of time. The subsequent movements associated with unloading/reloading will be small and will occur rapidly. In these cases, the main source of long-term displacements is likely to be secondary compression settlements. In this paper, a laboratory investigation of one-dimensional consolidation of clayey soils was carried out and a formula has been proposed to compute the postconstruction settlement of low embankment. The results show that the settlement increases with the increasing amplitude of the cyclic load, and the effectiveness of surcharge preloading depends on the difference between the surcharge and the amplitude of the cyclic load.

show abstract

Secondary settlement estimation in surcharge preload subject to time effect of secondary consolidation coefficient

Cited by 8 publications

References 12 publications

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

Effects of Dynamic Traffic Load Frequency on Consolidation Behavior of Soft Clay Under Low Embankment: Experimental and Numerical Investigation

Controlling the Settlement of the Low Embankment on Soft Ground by Surcharge Preloading Method

Contact Info

Product

Resources

About