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针对天然沉积硬粘土的结构特性,结合强夯法加固硬粘土地基的工程实例,通过强夯前后的室内土工试验与现场的标准贯入试验、静力触探试验和静载荷试验,对处理前后的物理性质指标、强度指标及变形特性进行了分析和对比,并对加固效果进行了评价。试验结果表明:强夯加固工法对此硬粘土地基的影响深度约3m;在影响深度范围内,土体的天然结构强度遭到破损,强度指标有所降低,力学性质变差,但物理状态指标有所改善。
Aiming at the structural characteristics of natural sedimentary hard clay and the engineering examples of consolidating the hard clay foundation with dynamic consolidation method, the indoor geotechnical test and the standard penetration test, the static penetration test and the static load test before and after dynamic compaction are adopted to analyze the mechanical properties of the pre- Physical properties index, strength index and deformation characteristics were analyzed and compared, and the reinforcement effect was evaluated. The test results show that the influence of dynamic compaction method on this hard clay foundation is about 3m in depth. The natural structural strength of the soil is damaged in the range of influence depth, the strength index is decreased and the mechanical properties are deteriorated. However, it has been improved.