Simplified method for estimating vertical stress-settlement responses of piled embankments on soft soils. (March 2020)

• Record Type: Journal Article
• Authors: Rui, Rui; Han, Jie; Zhang, Lei; Zhai, Yuxin; Cheng, Zhi; Chen, Cheng
• Is Part Of: Computers and geotechnics. Volume 119(2020)
• Publication Date: 2020-03
• Subjects: Pile -- Embankment -- Analytical solution -- Stress concentration ratio -- Soil arching -- Trapdoor test; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2019.103365
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: Soil arching development patterns of piled embankment have been comprehensively investigated by performing multi-trapdoor tests in many previous studies. However, the application of these findings is inevitably limited as the subsoil-pile system under the embankment is generally not explicitly taken into account. In this study, an analytical method was employed to evaluate the compressibility of the subsoil-pile system. The compressibility analysis results were used together with the analytical models for soil arching development obtained from multi-trapdoor tests to estimate the vertical stress-settlement response of the subsoil-pile-embankment system. A parametric study was conducted to investigate the effect of the following influence factors: friction angle of embankment fill, embankment height, coefficient of skin friction, pile spacing, pile cap width, and pile to subsoil modulus ratio on the vertical stress-settlement response. Based on the parametric study, correlations were developed between the influence factors and the vertical stress-settlement responses of the subsoil-pile-embankment system. The developed method was favorably examined by a set of field test results in the literature.