湿陷性黄土地基夯扩挤密桩挤密效应试验研究  

Research on Extrusion Effect of Lime-soil Compacted Pile in Collapsible Loess

作　　者：梁金国[1] 韩立君[1] 李华伟[1] 

机构地区：[1]河北建设勘察研究院有限公司,石家庄050031

出　　处：《工程勘察》2008年第10期15-18,共4页Geotechnical Investigation & Surveying

摘　　要：通过大量的现场试验数据分析,研究了湿陷性黄土地区夯扩挤密桩对改善黄土地基湿陷性的效果。根据桩周土孔隙比、挤密系数和湿陷系数沿桩体径向的分布规律,将桩周土分为"充分挤密区"、"有效挤密区"、"挤密影响区"和"非挤密区"四个区域。结合不同桩间距条件下桩间土体的室内试验,揭示了夯扩挤密桩桩间土挤密效应,为这种地基处理方法的合理设计提供了参考。Based on the analysis of the testing data, the effect of improved collapsible loess using the lime-soil compacted pile is studied. The pile surrounding is divided into full extrusion area, effective extrusion area, extrusion influence area and no-extrusion area according to the rule of the void ratio, the extrusion coefficient and the Collapsibility coefficient of the surrounding soil. Combining the testing of surrounding soil with different space between pile, the regularity of the extrusion effect of lime-soil compacted pile in collapsible loess is put forward.

关 键 词：夯扩挤密桩 湿陷性黄土 挤密效应 孔隙比 湿陷系数 

分 类 号：TU475.3[建筑科学—结构工程]