Settlement and Stress Analysis of Soil–Cement Column-Reinforced Foundation under an In Situ Stabilized Layer

Chen, Yonghui; Zhou, Yang; Kong, Gangqiang; Chen, Long; Chen, Geng

doi:10.1061/(asce)gm.1943-5622.0002205

Cited by 6 publications

(5 citation statements)

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“…Common stabilization additives include Portland cement, lime, fly ash, superfine slag powder and industrial or municipal solid wastes. Different concentrations and mixtures could affect the behavior of the stabilized slab (Chen et al ., 2021; Gao et al ., 2020; Zhang et al ., 2017). Choosing appropriate stabilizing agents and dosages is critical in SSPS embankments, which govern the strength and cost of the stabilized slab.…”

Section: Discussion On the Case Studymentioning

confidence: 99%

“…The results of the existing studies (Anggraini et al ., 2015; Okyay and Dias, 2010; Wang et al ., 2020; Dang et al ., 2021) indicate that the strength of the stabilized slab on the settlement and stress concentration ratio is related to the change of the elastic modulus. By adjusting the elastic modulus of the stabilized slab (Chen et al ., 2021), the influence of the stiffness of the stabilized slab on the settlement and stress concentration ratio was studied in this paper with six elastic moduli, i.e. 28 MPa, 40 MPa, 60 MPa, 80 MPa, 100 MPa and 200 MPa.…”

Section: Discussion On the Case Studymentioning

confidence: 99%

“…Zhou et al . (2021) and Chen et al . (2021) proposed the stress transfer model for the structure of solidified soil cushion combined with piles by analyzing the stress transfer mechanism between piles and surrounding soil and the differential settlement.…”

Section: Introductionmentioning

confidence: 97%

“…Several studies have proposed using a slab stabilized with lime or cement to improve soft grounds, replacing GRPS embankments (Anggraini et al, 2015;Okyay and Dias, 2010;Ishikura et al, 2016;Wang et al, 2018Wang et al, , 2020Dang et al, 2021;Zhou et al, 2021;Chen et al, 2021). The stabilized slab and pile-supported (SSPS) embankment system differs from the GRPS embankment system because of the disparities between the mechanical behavior of stabilized slabs placed on piles with higher stiffness (elastic modulus) and cohesion to support embankments and the geosynthetic reinforcement with a low elastic modulus and no cohesion.…”

Section: Introductionmentioning

confidence: 99%

“…However, these experimental and numerical studies were mainly based on embankment test models or 2D equal stress and strain models. Zhou et al (2021) and Chen et al (2021) proposed the stress transfer model for the structure of solidified soil cushion combined with piles by analyzing the stress transfer mechanism between piles and surrounding soil and the differential settlement. However, the solidified soil cushion was interpreted as the filling material in the calculation model, and the deformation characteristics of the cushion and the stress characteristics of the underlying layer were not considered, which is not consistent with the stress properties of the structure.…”

Section: Introductionmentioning

confidence: 99%

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Settlement and stress analysis in stabilized slab- and pile-supported embankment based on double-equal settlement plane

Wang,

et al. 2024

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PurposeThe soft stabilized slab and pile-supported (SSPS) embankment is an improvement technique to increase the efficiency of resources in road construction. To capture the effects of stabilized slabs on the stress transfer mechanism, the differential settlements and the lateral displacement of the embankment completely. A theoretical model of SSPS is proposed by considering the effect of soil arching and the interaction between the embankment fill, stabilized soil, pile, foundation soil and bearing stratum.Design/methodology/approachIn the theoretical model, the stress and strain coordination relationship of the system was analyzed in view of the minimum potential energy theory and equal settlement plane theory. Subsequently, the theoretical method was applied to field tests for comparison. Finally, the influence of the elastic modulus and the thickness of the stabilized slab on the stress concentration ratio and foundation settlement were examined.FindingsIn addition to the experimental findings, the method has been revealed to be reasonable and feasible, considering its ability to effectively exploit the stabilized slab effect and improve the bearing capacity of soil and piles. An economical and reasonable arrangement scheme for the thickness and strength of stabilized slabs was obtained. The results reveal that the optimum elastic modulus was chosen as 28 MPa–60 MPa, and the optimum thickness of the stabilized slab was selected as 1.5 m–2.1 m using the parameters of field tests, which can provide guidance to engineering design.Originality/valueAn optimization calculation method is established to analyze the load transfer mechanics of the SSPS embankment based on a double-equal settlement plane. The model’s rationality was analyzed by comparing the settlement and stress concentration ratios in the field tests. Subsequently, the influence of the elastic modulus and the thickness of the stabilized slab on the stress concentration ratio and settlement were examined. An economical and reasonable arrangement scheme for the thickness and elastic modulus of stabilized slabs was obtained, which can provide a novel approach for engineering design.

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Section: Discussion On the Case Studymentioning

confidence: 99%