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依托广西钦州港区某地基处理工程,基于夯前夯后多道瞬态面波测试和夯后动力触探试验、置换墩着底检测及静载荷试验,对15000kN·m能级强夯置换法处理软弱地基效果进行了检测。检测结果表明:强夯置换后,地基承载力明显提高,复合地基承载力大于200kPa,压缩模量大于20MPa;15000kN·m能级强夯置换有效加固深度7.0~10.0m,平均有效加固深度9.0m左右;强夯置换后,置换墩体与墩间土间、强夯置换区与周边的强夯区间均存在明显的不均匀性,设计时应充分考虑到强夯置换后地基土的不均匀性。
Relying on a foundation treatment project in Qinzhou Port of Guangxi Province, based on the multi-channel instantaneous surface wave test after rammer compaction and after the rammer dynamic penetration test, the replacement pier pier bottom test and static load test were carried out to test the 15000kN · m level dynamic compaction displacement method The effect of dealing with weak foundations was tested. The test results show that the bearing capacity of foundation is obviously increased after dynamic compaction replacement, the bearing capacity of composite foundation is more than 200kPa and the compressive modulus is more than 20MPa. The effective reinforcement depth of 15000kN · m level dynamic replacement is 7.0 ~ 10.0m, and the average effective reinforcement depth is 9.0m ; After replacement by dynamic compaction, displacement between the pier body and the pier between the soil, dynamic compaction replacement zone and the surrounding dynamic compaction interval there are obvious inhomogeneity, the design should take full account of the replacement of dynamic compaction of the foundation soil after the uneven .