Bearing capacity mechanism of vibro-replacement stone columns in coral sand with particle breakage
Xiangji Ye, Zongyuan Pan, Feng Liu, Hongxiang Tang, Zezhou Ji, Wei Zhao, Xin Zhao · 2026
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Description
Xiangji Ye and six colleagues rework the maths behind stone columns driven into coral sand, a ground material whose grains crush under load. Standard bearing formulas assume soil swells or holds its volume, but coral sand shrinks as particles break, wasting energy that older models ignore. The 2026 paper proposes a three-step field method for measuring porosity in place, then builds a coupled model. Breakage energy loss is converted into extra confining pressure, and the sand's friction angle evolves as its density changes.
An airport runway project on coral sand ground supplied the test. The model's predicted sideways limit stress, 166.3 kilopascals, landed inside the field-measured range of 158.0 to 175.0 kilopascals from nine plate load tests. Prediction error across the full data span ran from minus 5.3 to plus 5.0 percent, far tighter than standard methods. The authors offer the model as a reliable design basis for building on coral sand.
Catalog record
| CREATOR | Xiangji Ye, Zongyuan Pan, Feng Liu, Hongxiang Tang, Zezhou Ji, Wei Zhao, Xin Zhao |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 58122 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |