夯扩碴土桩处理深厚杂填土地基

Ground Treatment of Deep Miscellaneous Filling by Compacted-expanded Residual-soil Piles

采用夯扩碴土桩技术对某深厚杂填土地基进行了人工处理,运用静载荷试验、静力触探试验和动力触探试验分别对复合地基的承载力、桩间土挤密效果和桩身密实度进行了检测。结果发现,松散的杂填土经碴土桩处理后,复合地基承载力特征值fspk≥200kPa。还对碴土桩设计、施工和检测中的有关问题进行了探讨,给出了合理化的建议。

The compacted-expanded residual-soil piles are used to treat the miscellaneous filling ground in an engineering. The static load test, static penetration test and dynamic penetration test are applied to detect the bearing capacity of the composite foundation, the compaction effect of soil between piles and compaction degree of piles. The results show that the bearing capacity of treated miscellaneous filling ground increases greatly. The problems in design, construction and test are discussed and some suggestions are given.