吹砂填海地基强夯加固研究

Research on Dynamic Compaction of Foundation of Blowing Sand Reclaimation

研究目的:针对沿海地区吹砂填海越来越普遍的现状,研究如何经济有效地处理填海地区的基底,如何构建合理的数值模型进行研究,从而实现工程最经济合理有效的目标。研究结论:根据吹砂填海地基处理工程的具体特点,建立三维数值模型,对夯沉量进行系统的研究,并且与实际工程进行数据的对比分析,得出采用强夯法处理砂土,利用夯锤加载使土体中的孔隙体积减小,土体变得更密实,从而提高土体强度,加固效果明显,是处理沿海地区吹填砂地基的有效措施。根据数值模拟研究与实际工程的对比分析,得出最合理有效的强夯参数,对铁路工程及其他类似工程整治起到一定的指导和借鉴意义。

Research purposes： In coastal area, the blowing sand reclaimation becomes more and more popular, so it is necessary to do the research on how to effectively and economically treat the foundation base in the reclaimation area and how to establish the reasonable numerical model to make the project the most economic and reasonable. Research conclusions：According to the characteristics of disposal engineering of the foundation of the blowing sand reclaimation, a 3 - D numerical model was established to study the settlement caused by the dynamic compaction. Its results was compared with the data of some actual projects for treating the sand - soil with the dynamic compaction method. By loading with compaction hammer, the volume of void was decreased and the density of the soil was increased, obtaining good treatment result. This method was available for treating the foundation of blowing sand reclaimation in the coastal area. The most reasonable dynamic compaction parameters were got by comparing and analyzing the numerical simulation research and the actual project, and it could provide the reference to the similar works.