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Response of vertically-loaded pile in spatially-variable cement-treated soil
Tianyue Wu1, Zhaohua Sun1,2,3, Wanxia Tan1
1School of Transportation and Civil Engineering, Nantong University, Nantong, China.
Plos One
|April 13, 2022
Summary
This study shows that spatial variability in cement-treated soil reduces pile performance. Drained conditions control ultimate bearing resistance, crucial for designing pile foundations in such soils.
Area of Science:
- Geotechnical Engineering
- Soil Mechanics
- Foundation Engineering
Background:
- Piles are widely used in cement-treated soil.
- Limited research exists on the ultimate bearing capacity of piles in cement-treated soil, especially considering soil variability.
- Pile installation errors also impact performance.
Purpose of the Study:
- To investigate the ultimate bearing capacity of driven piles in cement-treated soil.
- To analyze the effects of spatial variability and installation errors on pile performance.
- To determine the governing conditions for pile bearing resistance in cement-treated soil.
Main Methods:
- Finite element analyses (FEA) were employed.
- Both deterministic and random FEA were conducted.
- The study incorporated spatial variability of cement-treated soil and pile positioning errors.
Main Results:
- Shaft resistance is the primary contributor to the ultimate bearing resistance of piles in cement-treated soil.
- Spatial variability of the soil negatively impacts the overall performance of the piles.
- The ultimate bearing resistance is governed by drained conditions.
Conclusions:
- Spatial variability significantly affects pile performance in cement-treated soil.
- Drained ultimate bearing resistance is the critical factor for determining the design working compression load of piles.
- Engineers should consider drained conditions in the design of piles for cement-treated soil.
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