滨州港港区吹填土渗透固结特性试验研究

Experimental study on permeation and consolidation characteristics of dredger fill in BinzhoUPort area

为准确确定滨州港吹填土地基处理参数,采用渗透固结和真空预压2种试验方法研究滨州港吹填土的物理性质参数与固结压力的关系,结果表明:试验后吹填土的参数仅与固结压力的大小有关,与其初始状态无关,且各参数的变化速率在压力小于50 kPa时比压力大于50 kPa时快。渗透固结试验中100 kPa压力和真空预压试验中-100 kPa压力对吹填土的压缩效果基本相同,试验后各土样物性参数基本一致;如采用真空预压对吹填土地基进行处理,在不采取堆载等其他措施的情况下,吹填土的极限含水率为44%,孔隙比为1.23,密度为1.78 g cm^(3)。

To accurately determine the foundation treatment parameters of the dredger fill in BinzhoUPort,this paper uses permeation and consolidation as well as vacuum preloading tests to explore the relationship between the physical parameters and the consolidation pressure of the dredger fill in BinzhoUPort.The results reveal that the parameters of dredger fill after the tests are only related to the consolidation pressure and is irrespective of its original state,and the change rate of physical parameters at the pressure of less than 50 kPa is faster than that at the pressure of more than 50 kPa.Moreover,in the permeation and consolidation test at the pressure of 100 kPa and the vacuum preloading test at the pressure of-100 kPa,the pressure has the same compression effect on dredger fill,and the physical parameters of dredger fill samples after the tests are consistent.When we employ vacuum preloading for foundation treatment of dredger fill and take no other measures such as stacking,the dredger fill has a limit water cut of 44%,with the void ratio of 1.23 and the density of 1.78 g cm^(3).