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为了研究高炉渣粉煤灰作地基回填料的强夯性能及效果,进行了对该类人工填料地基的强夯数值模拟以及夯后地基沉降的观测。依托某钢铁企业新体系高炉矿渣地基处理项目,构建拟静力法下夯锤与土体之间的接触力求解模型,并基于FLAC~(3D)软件,模拟高炉渣粉煤灰地基强夯过程中的地基土瞬时沉降变化,并对夯后地基土力学性能进行分析。结果表明:强夯高炉渣地基的最佳点夯次数为6~7次,强夯加固深度约为6 m。依据强夯施工后的沉降观测,分析该类地基强夯后土体的沉降变形特性及密实效果,为同类研究提供参考。
In order to study the dynamic compaction performance and effect of blast furnace slag fly ash as backfill material, the dynamic compaction numerical simulation of such artificial fill ground and the settlement observation of rammed foundation were carried out. Relying on the blast furnace slag foundation treatment project of a new system of iron and steel enterprises, the contact force between the rammer and the soil under the pseudo-static method is solved and the dynamic compaction process of the blast furnace slag fly ash ground is simulated based on FLAC 3D software In the foundation soil instantaneous subsidence changes, and analysis of the mechanical properties of rammed soil. The results show that the optimum number of dynamic compaction blast furnace slag is 6-7 times, and the depth of dynamic compaction is about 6 meters. According to the settlement observation after dynamic compaction, the settlement deformation characteristics and compact effect of the soil after dynamic compaction are analyzed, providing reference for similar research.