碎石回填土下液化砂层的强夯试验研究

针对某沿海下卧地震液化夹层的碎石回填土地基,开展了不同能量级的强夯试验。通过采用平板载荷试验、孔隙水压力测试、地面振动测试、室内土工试验等多种方法和手段,对比分析了强夯前后地基土工程性质的变化,评价了强夯产生的振动对地基土液化的影响以及对周围环境的影响,对下卧地震液化夹层的碎石回填地基强夯加固效果做出了评价。为同类复杂地质条件下不同夯击能的强夯地基处理提供了翔实的经验数据和参考依据。

Study on dynamic compaction tests for liquefiable sand stratum under gravel backfill soil

Aiming at the underlying liquefiable gravel backfill intercalation, the dynamic compaction tests with different energy levels are carried out. By using plate loading tests, pore water pressure testing, ground vibration testing, laboratory soil testing and other methods, the comparative analysis on the engineering characteristic variation of the foundation soil before and after the compaction has been done. The influences of the compaction to the liquefaction of the soil and the surrounding environment are evaluated, and the compaction effects on the underlying liquefiable gravel backfill intercalation are assessed, which provide the detailed empirical data and reference for the same dynamic compaction treatment with different tamping energy under complicated geological conditions.