中文摘要：

利用真空预压法处理吹填土时,孔隙水压力变化常常反映土体固结程度的好坏。通过6个模型箱试验,监测不同排水系统下孔隙水压力变化,确定有效排水体间距。研究发现0.4m间距的土内孔压下降效果比0.8m间距的土内孔压下降效果好;排水体内的孔隙水压力与排水体类型有关,且距离排水体10 cm处土体内的孔隙水压力仅为排水体内孔隙水压力的1/2弱;滤膜排水系统中的吹填土孔隙水压力下降幅度最快,B型排水板系统次之,而砂井系统最慢。另外,对于吹填土而言,排水体有效间距介于0.4m与0.8m之间,其中滤膜的有效间距最大,B型排水板次之,砂井远小于前两者。

英文摘要：

Change of pore water pressure often reflects the degree of soil consolidation when vacuum preloading method is used to treat dredged fill.This paper uses six test chambers in laboratory to monitor the pore water pressure change in the fill under three drainage pipe systems and to determine the effective drainage spacing.The results show that the drop of pore water pressure in the fill for the driange spacing of 0.4m is than better than that of 0.8m.The pore water pressure in the soils is related to its drainage pipe system installed in the soil.The pore water pressure in the distance of 10cm to drainage pipe was half of that in drainage pipe body.The membrane drain system was the best for drainage.The B-type drain system was better than the sand drain system.In addition,in the dredged fill,the effective distance between the drain pipes was between 0.4m and 0.8m.Moreover,membranes had the largest effective horizontal spacing between drainage materials.The B-type drain system had a shorter effective spacing.The sand wells had the shortest effective spacing.