摘要
HHT-8强夯机具有夯实能量高、影响深度大、机动灵活等特点。以福建省某一实际工程为背景,采用GeoStudio软件对HHT-8强夯下路基动土压力分布规律进行数值模拟。研究表明,竖向附加土压力、横向应力在HHT-8强夯荷载直接作用范围(0~1m)随深度增大而减小,荷载能级对动土压力的影响较大;在荷载非直接作用范围(2~17m)随竖向深度加深呈先增大后减小趋势,荷载能级对动土压力的影响较小,且横向土压力的衰减速度较竖向附加应力更快。建议HHT-8强夯机在I、II、III、IV级荷载作用下路基工作区分别约为6.4m、6.9m、7.0m、7.1m。
HHT-8 dynamic compaction machine has the characteristics of high tamping energy,large influence depth and flexible operation.This paper uses Geo-Studio software to numerically simulate the dynamic soil pressure distribution of subgrade under HHT-8 dynamic compaction based on a practical project in Fujian Province.The research shows that the vertical additional soil pressure and lateral soil pressure decrease with the increase of depth in the direct range of HHT-8 dynamic compaction load(0-1m),and the load level has a great influence on the dynamic earth pressure.In the non-direct range of load(2-17m),dynamic earth pressure increases first and then decreases with the increase of vertical depth,and the load level has little effect on the dynamic soil pressure.The declining speed of lateral soil pressure is faster than that of vertical additional soil pressure.It is suggested that the working areas of subgrade of HHT-8 dynamic compaction machine under I,II,III and IV load are about 6.4 m,6.9 m,7.0 m and 7.1 m,respectively.
出处
《福建建设科技》
2022年第2期80-84,共5页
Fujian Construction Science & Technology
基金
福建省住房和城乡建设厅科技开发研究项目(2022-K-108)。
