摘要
在疏浚淤泥中添加絮凝剂,不但可以加速泥浆沉积,还可以克服排水固结处理时的淤堵难题。然而,目前关于絮凝剂对疏浚淤泥固结特性的影响方面的研究较少。针对添加了不同类型絮凝剂的疏浚淤泥开展室内固结试验,研究絮凝剂种类等因素对疏浚淤泥固结特性的影响规律。结果表明:在压缩曲线中,在小压力下Ca(OH)2淤泥与APAM淤泥产生新的土体结构,可以抵抗小荷载,随着荷载逐渐增加,这种结构被破坏,结构产生的影响也变小。加入氢氧化钙的疏浚淤泥的固结系数比原泥显著增大,在小荷载下,氢氧化钙可以明显的改变土样的渗透系数,其他絮凝剂的效果均无氢氧化钙明显。
Adding flocculant in dredged silt can not only accelerate mud deposition,but also overcome the blockage problem in drainage consolidation treatment.However,there are few studies on the influence of flocculant on the consolidation characteristics of dredged silt.Indoor consolidation test of dredged silt with different types of flocculants was carried out to study the influence of flocculant types and other factors on the consolidation characteristics of dredged silt.The research showed that in the compression curve,Ca(OH)2 silt and APAM silt produced new soil structure under small pressure,which could resist small load.With the gradual increase of load,this structure was destroyed,and the influence of the structure became smaller.The consolidation coefficient of dredged sludge with calcium hydroxide was significantly higher than that of the original mud.Under small load,the calcium hydroxide could obviously change the permeability of soil samples,and other flocculants were not as effective as calcium hydroxide.
作者
徐洪群
徐桂中
冯哲源
刘锋
XU Hongqun;XU Guizhong;FENG Zheyuan;LIU Feng(Qinnan Water Affairs Station of Yandu District Water Affairs Bureau Water Station,Yancheng 224005,Jiangsu;School of Civil Engineering,Yancheng Institute of Technology,Yancheng 224000,Jiangsu;Suqian Chucheng Tenancy Co.,Ltd.,Yancheng 223800,Jiangsu)
出处
《江苏水利》
2020年第1期23-26,共4页
Jiangsu Water Resources
基金
国家自然科学基金(E080601)
