摘要
鉴于吹填土具有含水量高、地下水埋藏浅、表层承载力低等特点,工程建设中采用强夯-降水联合加固法对其进行地基加固处理.针对以粉砂、粉土为主(土层含大量粘粒)的吹填土,采用明沟排水+强夯方案进行地基处理,施工过程中通过低能量预夯、推土机碾压等辅助方式配合降水,加快降水周期;针对以粘性土(土层含大量砂、粉粒)为主的吹填土,采用真空降水+强夯方案进行地基处理,通过真空降水,合理控制施工参数,减小土体饱和度,有效拓展了强夯法的适用范围.此外,强夯-降水联合加固法在夯击过程中应遵循"少击多次、先少后多"的工艺,使夯击能与超静孔隙水压的消散速率相匹配.
In allusion to hydraulic fill soil which is mainly composed of silty sand and silty clay,drainage ditches ＋dynamic compac-tion is utilized to conduct foundation treatment,and low -energy pre -ram,bulldozers rolling way and other methods are employed to assist precipitation in the construction process for accelerating the precipitation cycle;for hydraulic fill soil which is mainly composed of clay,vacuum precipitation ＋dynamic compaction is used,and with vacuum precipitation,construction parameters are reasonably con-trolled,and soil saturation is reduced.
出处
《长沙大学学报》
2015年第2期40-42,共3页
Journal of Changsha University
关键词
明沟排水
真空降水
低能量预夯
强夯
ditch drainage
vacuum precipitation
low energy pre -ram
compaction
