Статья Open Access

Study on the application of dynamic compaction reinforcement at the cut-and-fill interface of high-fill foundation slopes at an airport

Cheng Xiaobing, Viacheslav Dzhedzhula
DOI
https://doi.org/10.63621/as./1.2025.09
Взято из
Том 2, № 1, 2025
Страницы
9–21
Просмотров
1 084 Просмотры

Аннотация

Due to the strict protection of arable land in China, an increasing number of high-fill projects involving “mountain excavation and ditch filling” have emerged. Improper treatment of the cut-and-fill interface may lead to engineering failures, such as differential settlement and slope instability. This article aimed to reveal the mechanism of dynamic compaction on fill soils and the impact of variations in the water environment on compaction effectiveness, thereby formulating scientifically grounded engineering strategies to address the issue of weak interfaces in cut-and-fill zones. Based on a high-fill airport project in a mountainous region of northwest China, a series of dynamic compaction tests with varying energy levels, static load immersion tests on the original foundation soil, and laboratory geotechnical experiments were conducted. The safety factor of the reinforced slopes was evaluated using the FLAC3D numerical model. The findings indicated that settlement from a single tamping action increased with greater energy input and decreased with the number of tamping cycles. The greatest settlement occurred during the initial 3-4 tamping passes and gradually stabilised after 6-8 passes. Following compaction, both the dry density and compressive modulus of the soil increased; the degree of improvement was positively correlated with tamping energy and gradually diminished with increased sampling depth. The results of the static load immersion test in the direct current area demonstrated that water immersion led to additional settlement of compacted soil. However, higher tamping energy during compaction resulted in less post-immersion settlement. These outcomes provide a theoretical foundation for designing direct current parameters and implementing engineering measures to mitigate soft zone issues at the cut and-fill interface 

Ключевые слова

mountain engineering; static load immersion test; weak layer reinforcement; interface strengthening method; FLAC3D numerical simulation

Использованные источники

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ЦИТИРОВАНИЕ

Xiaobing, C., & Dzhedzhula, V. (2025). Study on the application of dynamic compaction reinforcement at the cut-and-fill interface of high-fill foundation slopes at an airport. Architecture. Construction, 2(1), 9-21. https://doi.org/10.63621/as./1.2025.09