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针对填海工程大厚度碎石回填地基,开展了3000k N·m、6000k N·m和10000k N·m的高能级强夯现场试验,通过夯前、夯后现场超重动力触探试验、瑞雷波检测和夯后平板载荷试验结果的对比分析,确定出不同夯击能下强夯的影响深度和地基加固效果。综合分析认为,3000k N·m夯击能影响深度约为6m,承载力特征值为180k Pa;6000k N·m夯击能影响深度为6~9m,承载力特征值为200k Pa;10000k N·m夯击能影响深度为9~12m,承载力特征值为200k Pa。试验结果可为同类地区高能级强夯工程提供参考。
Aimed at the large-thickness gravel backfill foundation of reclamation project, a field test of high-energy dynamic compaction with 3000k N · m, 6000k N · m and 10000k N · m was carried out. Through on-site overweight dynamic propulsion test with rammer and rammer, Wave test and compaction after flattening load test results of the comparative analysis to determine the impact of different ram impact strength and ground consolidation effect. According to the comprehensive analysis, the impact of 3000 t N · m tamper depth is about 6m, the bearing capacity characteristic value is 180k Pa; the impact depth of 6,000k N · m is 6 ~ 9m, the bearing capacity characteristic value is 200k Pa; 10000k N · m ramming can affect the depth of 9 ~ 12m, bearing capacity characteristics of 200k Pa. The test results can provide a reference for high-energy dynamic compaction engineering in similar areas.