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柱锤夯实混凝土桩是柱锤冲扩桩技术的新发展,继承了柱锤冲扩桩二次挤密的功效,桩身混凝土经柱锤夯实成型,具有承载力高、造价低的优点。在研究柱锤夯实混凝土桩承载特性的基础上,重点研究柱锤夯实混凝土桩的施工工艺,解决地下水位以下饱和软土层柱锤夯实混凝土桩的成桩工艺问题。成桩试验表明:在地下水位以下施工,柱锤夯实混凝土桩必须采用沉管成孔、跟管夯扩填料的施工工艺,并对具体施工参数进行分析。
The column hammer compaction concrete pile is a new development of column hammer expanding pile technology. It inherits the secondary compaction effect of the pile hammer expanding pile. The pile concrete is compacted by the column hammer, which has the advantages of high bearing capacity and low cost. On the basis of studying the bearing characteristics of column hammer compaction concrete piles, the construction technology of column hammer compaction concrete piles is studied emphatically, and the pile piling technology problem of column hammer compaction concrete piles under saturated water layer is solved. Piling tests show that: Under the groundwater level construction, column hammer compaction of concrete piles must be used to sink holes, with the compaction of pipe compaction construction process, and the specific construction parameters were analyzed.