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挤密砂桩常适用于松散砂土、粉土等地基条件,为研究分析挤密砂桩在软土地基及砂层地基的适用性,在信阳某一工地设立软土及砂层土质实验区,布置不同形式的挤密砂桩试验方案,对加固前后的地基进行试验,通过对试验前后的数据进行对比,以分析挤密砂桩的适用性及桩体的合理布置。通过试验分析可知,对软土进行地基处理后,地基的承载力有所增加;对砂层地基进行处理后,地震液化问题得到一定的改善。结合处理效果与经济技术比选,选择出合适的试验方案,为今后挤密砂桩在此种地基条件的适用提供一定的参考。
Compacted sand pile is often applied to loose sand, silt and other foundation conditions. In order to study and analyze the applicability of compacted sand pile in soft ground and sandy foundation, a soft soil and sand soil experimental zone , Different forms of compacted sand pile test plan are arranged to test the foundation before and after reinforcement. The data before and after the test are compared to analyze the applicability of the compacted sand pile and the rational arrangement of the pile. The experimental analysis shows that the bearing capacity of the foundation increases after the foundation is treated with soft soil. After the sand foundation is treated, the liquefaction problem of the earthquake is improved to a certain extent. Combining the effect of treatment and the economic and technical comparison, the suitable test scheme is selected to provide some reference for the future application of such compaction sand pile in such foundation conditions.