强夯振动引起CFG复合地基桩身拉力的模型试验研究

摘要

Dynamic compaction is a well known and effective method in ground improvement. The application of this method is often restricted because of its noise, vibration and construction environment. This paper using dynamic compaction engineering example of Caofeidian industrial park,researched on surrounding CFC pile composite foundation pile tensile stress caused by dynamic compaction vibration through the model test,end pointed out that the maximum tensile stress appears in a pile head 1/3 pile long range,and put forward the pile maximum tension stress calculation formula based on the tamping energy and tamping distance.%强夯地基处理技术是一种常见、有效的地基处理方法,但由于其施工时的噪音、振动等对周围建筑物和环境的影响而限制了它的作用.本文利用曹妃甸工业区的强夯工程实例,对强夯振动引起周边CFG桩复合地基桩体拉应力进行了模型试验研究,指出最大拉应力出现在桩上部1/3桩长范围内,并提出基于夯击能和夯击距离的桩体最大拉应力的计算公式.