高能级强夯法在湿陷性黄土地基处理中的实践研究

采用8000kN.m高能级强夯处理湿陷等级为Ⅲ～Ⅳ级的大面积湿陷性黄土地基,对其设计、施工和检测进行了系统全面的实践研究。通过瑞利波波速测试、标准贯入试验、室内土工试验和静力载荷试验等对强夯处理湿陷性黄土的效果进行了综合检测,对比分析了强夯前后地基土物理力学指标、地基承载力和湿陷性的变化情况,确定有效加固深度、湿陷性消除、地基承载力等均满足设计要求,可为其他高能级强夯处理湿陷性黄土工程的设计、施工、检测提供参考。

Practice study on foundation treatment of collapsible loess by using high-energy dynamic compaction

The systematic and comprehensive study on the design, construction and testing of the foundation treatment with large-scale Ⅲ-Ⅳ grade collapsible loess are carried out by using 8000 kN ·m high-energy dynamic compaction. The effects on the foundation treatment of the collapsible loess are analyzed through the Rayleigh wave velocity tests, the standard penetration tests, the laboratory soil tests and the static cone penetration tests. Through the comparison with the indices of the physical and mechanical properties of the foundation soil before and after the dynamic compaction treatment, the effective reinforcement depth, the elimination of collapsibility and the bearing capacity of the foundation are found to meet the design requirements. The results could supply the reference for the design, construction and testing of other collapsible loess foundations with dynamic compaction treatment.