大粒径碎石土强夯法试验研究

Experimental Study on the Dynamic Consolidation for Large Particle Size Gravel Soil

为探讨强夯法对最大粒径700mm碎石土的地基加固效果,依托沙特利雅得某项目,分别对处理深度6m和4m的试验区进行强夯加固,夯后通过标准贯入试验(SPT)、区域荷载试验(ZLT)和板荷载试验(PLT)等检测方法评估强夯后土体物理和力学性质的变化,通过试验和计算,SPT值、不均匀沉降、地基回弹模量、内摩擦角、地基承载力、长期沉降量预测等指标均能满足设计要求,为后期现场大面积强夯施工提供理论基础,可就地取材,为项目节约成本,大大节省工期,为类似材料地基加固工程及相关试验有一定借鉴意义。

To explore the effect of dynamic consolidation on the foundation reinforcement of crushed stone soil with a maximum particle size of 700mm,a project in Riyadh,Saudi Arabia was used as a basis.Dynamic consolidation reinforcement was applied to test areas with treatment depths of 6m and 4m.After dynamic consolidation,the physical and mechanical properties of the soil were assessed using Standard Penetration Test(SPT),Zone Load Test(ZLT),and Plate Load Test(PLT).The results of the tests and calculations show that indicators such as SPT values,uneven settlement,foundation rebound modulus,internal friction angle,foundation bearing capacity,and long-term settlement prediction all met the design requirements.It provides a theoretical basis for subsequent large-scale dynamic compaction construction on site,allows for the use of local materials,saves costs,and significantly reduces the construction period.This project serves as a reference for similar foundation reinforcement projects and related tests.