Study on Bearing Capacity and Failure Mode of Multi-Layer-Encased Geosynthetic-Encased Stone Column under Dynamic and Static Loading

Bowen Kang, Jiaquan Wang (), Yuanwu Zhou () and Shibin Huang
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Bowen Kang: College of Architecture and Electrical Engineering, Hezhou University, Hezhou 542899, China
Jiaquan Wang: College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Yuanwu Zhou: College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
Shibin Huang: College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China

Sustainability, 2023, vol. 15, issue 6, 1-18

Abstract: The “method of overlap” replaces traditional welding to solve the problem of how the geosynthetic-encased stone column is limited by the welding frame during site construction, making the site construction simplified and economical, but its bearing mechanism is not clear. Therefore, the bearing mechanism and failure mode of the stone column was studied through the compression test of the multi-layer geosynthetic-encased stone column under dynamic and static loading. The research shows that the multi-layer encasement improves the modulus and lateral restraint of the stone column, which increases the stress transfer rate and reduces the damage degree of the stone column. The vertical ultimate bearing capacity increase in multi-layer geosynthetic-encased stone columns under dynamic and static loading is significantly different, and the difference can be up to 47.1%; the corresponding number of encasement layers should be selected according to the actual situation. The influence of the difference between dynamic and static loading on the location of the main radial strain of the stone column can be ignored, but the lateral restraint of the stone column under dynamic loading is weakened, the stress transfer rate is reduced, and the radial strain is reduced and more uniform along the stone column height. The vertical ultimate bearing capacity of the one- and two-layer geogrid-encased stone column under dynamic loading is lower than that of static loading. When treating soft foundations, the influence of traffic loads should be considered, and the bearing capacity of the geosynthetic-encased stone column should be appropriately increased in design value.

Keywords: geosynthetic-encased stone column; multi-layer encasement; radial strain; failure mode; dynamic and static loading (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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