【摘要】 探讨了沉管干振碎石桩对土层的加固效应 .通过在不同土质条件中对不同充盈系数的碎石桩在成桩过程中的孔压、侧向位移的量测以及碎石桩处理后对桩间土进行的标准贯入试验和瞬态瑞利波的检测 ,经过分析认为 :碎石桩的地基处理效果与土层性质关系很大 ,在粉土层中碎石桩处理效果明显 ,在粘性土中碎石桩处理后土体强度提高不大 ;充盈系数大的碎石桩对桩周土挤压明显 ;围压也是影响碎石桩处理效果的一个重要因素 ,因此在碎石桩地基处理中应综合考虑各种因素 ,以获得最佳的技术和经济效益更多还原

【Abstract】 The compaction effect on the soil by dry vibrated gravel columns is discussed.According to the measuring of the pore water pressure, and the lateral displacement and the standard penetration tests between piles after foundation treatment by gravel piles and the inspect by SASW, the authors conclude that the treatment effect of gravel piles relates closely to the soil property — the treatment effect on silty soil is evident in contrast with the effect on clay. This paper also concludes that around pressure is another important factor in foundation treatment effect. In a word, the treatment effect by gravel columns should integrate all factors in order to gain the most technical and economic benefit.更多还原