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中文摘要：
针对滨海新近吹填土地基存在的问题,以及在强夯加固前必须解决地下水位过高问题,提出两种解决方法：一是采取井点降水措施绝对降低地下水位后强夯,即高真空击密法;二是在原地基表面回填一定厚度砂土,相对降低地下水位后强夯,即常规强夯法.对以上两种工法在同一试验场地开展对比性试验研究.结果表明,施工过程中同一深度处高真空击密法场地的孔隙水压力始终小于常规强夯法场地;加固区的地基土强度和地基承载力明显提高,各级荷载作用下的沉降量明显减小.因此高真空击密法更适宜于滨海新近吹填土地基的加固.
英文摘要：
From the problems in recent dredger fill costal area,something must be done to solve the problem of high groundwater level before dynamic compaction,so two ways are proposed in the paper.Firstly,well-point dewatering is introduced to decrease the groundwater level absolutely before dynamic compaction,which is the high vacuum densification method（HVDM）;Secondly,a certain thickness of the sand is lay on the original ground surface to decrease the groundwater level relatively before dynamic compaction,which is the routine dynamic compaction method（DCM）. The comparative experiment study is carried out on the same site. Experiments show that： super pore water pressure of the HVDM area is always lower than that of the DCM area throughout construction process.After compaction, soil intensity and ground bearing capacity of the HVDM area are obviously higher than that of the DCM area. Settlement of the HVDM area is much lower under each load level. Above all HVDM is more suitable for the ground treatment of recent dredger fill soil in costal area.
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