Field study of bearing performance of combined grouted piles in strongly weathered mudstone strata with bored piles
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View abstract on PubMed
Summary
This summary is machine-generated.Combination grouting significantly enhances foundation pile performance in weathered mudstone. This method improves lateral and end resistance, increasing bearing capacity and allowing for shorter pile lengths in challenging soil conditions.
Area Of Science
- Geotechnical Engineering
- Foundation Engineering
- Soil Mechanics
Background
- The study addresses foundation design challenges in strongly weathered mudstone strata.
- Nanning Ronghe East Railway Station City Plaza serves as the engineering background.
- Understanding pile-soil interaction in this specific geological formation is crucial.
Purpose Of The Study
- To evaluate the effectiveness of combination grouting on foundation pile performance.
- To compare the bearing capacity and internal forces of grouted versus ungrouted piles.
- To analyze the impact of grouting on lateral resistance and end resistance in weathered mudstone.
Main Methods
- The O-cell (Osterberg cell) method was employed for static load testing of foundation piles.
- Comparative experiments were conducted on two sets of six test piles.
- Load-settlement curves and internal forces were systematically analyzed.
Main Results
- Pile-soil interaction in mudstone exhibits friction-type pile characteristics.
- Combination grouting significantly enhances lateral and end resistance of foundation piles.
- Post-grouted piles showed increased bearing capacity (1.71-1.75 times design values) and improved ultimate lateral and end resistance (39.5%-46.9% increase).
Conclusions
- Combination grouting effectively improves the bearing performance and stability of foundation piles in strongly weathered mudstone.
- The method allows for potential reduction in pile length while meeting design requirements.
- Findings offer valuable insights for similar projects in challenging geological strata.
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