填土地基强夯加固效果研究

Reinforcement Effect of Dynamic Compaction on a Backfilled Foundation

摘要:

针对回填土地基,通过量纲分析得到强夯加固深度和累积夯沉量的计算公式,结合已有工程资料对所提出的计算公式进行验证。结果表明:该公式能够较为精确地预测填土地基的加固深度与累积夯沉量;分析表明:累积夯沉量与加固深度比值随着诸多要素而变化,仅在确定的落距和夯锤半径范围内的才可以作为常数进行推广;最后分析夯锤半径及厚度对强夯效果的影响。

Abstract:

Aiming at backfilled foundation,formulas of reinforcement depth and cumulative settlement have been obtained by dimensional analysis.The proposed formulas have been validated combined with the existing engineering data.The results show that the formulas can more accurately predict reinforcement depth of backfilled foundation and cumulative settlement,and also can analyze the relationship between cumulative settlement and reinforcement depth.The results showed that the ratio of cumulative settlement and reinforcement depth varies with many factors, and only in certain distance and rammer radius,can it be extended as a constant.In the last,we analyze the impact of the hammer radius and thickness on the effect of dynamic compaction.The conclusion has a certain reference value for similar practice.