The research investigates the performance of HSCA high-strength preloaded expansion piles within calcareous sand foundations, highlighting advancements aimed at optimizing construction reliability.
This study examines how HSCA high-performance expansion piles improve load-bearing capacity and stability under loads via innovative compaction techniques, particularly using the high-performance expansion agent.
The research includes contributions from the authors of the article affiliated with various institutions focused on geotechnical engineering and material sciences.
The experiments and tests were conducted, leading up to the publication of the findings reported from January 2025.
Tests were carried out at a designated calcareous sand test base in Danzhou City, Hainan Province, China, and included indoor model tests.
With rapid infrastructure development on oceanic reefs, the unique properties of calcareous sand challenge traditional construction methods. Improving pile performance is necessary to prevent failures and economic losses.
The research involved indoor model tests and field testing to assess load-settlement curves, axial force distributions, and the impact of varying dosages of the HSCA expansion agent on the bearing capacity of the piles.
The ultimate bearing capacity can be increased by 56%, and the ultimate side resistance by 63% due to HSCA expansion agent use.
The results indicate significant improvements due to the effects of HSCA on both pile side resistance and pile tip, underscoring its potential for construction applications.
The piece will begin with the importance of improving construction methods for piles in calcareous sand and the significance of HSCA for overcoming engineering challenges.
Discuss the physical properties of calcareous sand compared to traditional soils and explain previous challenges faced due to its behavior during pile installation and load bearing.
Describe the experimental design, including model preparation and testing apparatus for both indoor and field tests, emphasizing innovations introduced by the HSCA.
Present results on load-bearing improvements, including detailed discussions on the role of particle compaction and stress distribution around the piles.
Summarize key findings, stressing the importance of HSCA for enhancing pile performance and potential applications for future infrastructure projects utilizing calcareous sand foundations.