The rebound index Cr is an important design parameter in engineering construction, and its determination is cumbersome and susceptible to errors. Explaining the macroscopic rebound characteristic parameter Cr from the perspective of microscopic mechanism is an important research area that is addressed in this study. In this paper, the different soil parameters, including the Cr parameter and the physical parameters (void ratio er liquid limit water content WL, and plasticity index Ip), have been determined through experiments for the undisturbed clay of Chongming East Shoal (CES), Shanghai. Further, scanning electron microscopy (SEM) imaging was used to analyze the microstructural features. Through SEM, the grey correlation degree, the average abundance of structural units ACp and the average equivalent diameter of pores ADv were determined as the soil microstructure parameters with the most significant correlation with Cr. The predictive analysis model of Cr was then carried out combined with the PSO-SVM algorithm. In order to evaluate the influence of microscopic parameters of soil on the prediction accuracy, four sets of input parameter combinations were used. The results indicate the high prediction accuracy of the developed model. Sensitivity analysis was also carried out, which showed that the sensitivity of Cr to ACp and ADv was significantly lower than e; however, the difference from wL and Ip was small, indicating that it is imperative to consider microscopic parameters while predicting Cr. This study, thus, provides a basis and method for predicting the rebound index of soil from the microstructure perspective.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Prediction of Undisturbed Clay Rebound Index Based on Soil Microstructure Parameters and PSO-SVM Model


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Dong, Jiaqi (Autor:in) / Wang, Boxin (Autor:in) / Yan, Xuexin (Autor:in) / Xu, Xinchuan (Autor:in) / Xiao, Guangping (Autor:in) / Yu, Qingbo (Autor:in) / Yao, Meng (Autor:in) / Wang, Qing (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2022-05-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Design of an undisturbed soil sampler

    Magalhaes,P.S. / Braunbeck,O.A. / Teixeira,M.A. et al. | Kraftfahrwesen | 1997


    Design of an Undisturbed Soil Sampler

    Magalaes, P. S. G. / Braunbeck, O. A. / Teixeira, M. A. | British Library Conference Proceedings | 1997


    Effect of Freeze-Thaw Cycles on Dynamic Characteristics of Undisturbed Silty Clay

    Cui, Gao Hang / Cheng, Zhuo / Zhang, Daili et al. | Springer Verlag | 2022


    Undisturbed telephone traffic

    Schwiderski, E. | Engineering Index Backfile | 1958


    Prediction of clay soil compaction

    Raghavan, G.S.V. / McKyes, E. / Beaulieu, B. | Elsevier | 1977