摘要
341省道马山至宜兴周铁段YMA02竺山湖线路区采用围堰明挖法施工,其湖底含有大量的疏浚淤泥,淤泥的不合理处理将会给周边造成巨大的环境压力。淤泥本身作为一种自然资源,直接外运废弃处理也是一种资源浪费。鉴于此,本文采用絮凝试验和颗粒级配试验,分析絮凝剂种类、掺量对于泥浆絮凝效果的影响,揭示了泥浆在絮凝过程中的絮凝机理和颗粒尺寸变化规律。研究结果表明:阳离子聚丙烯酰胺(CPAM)絮凝处理效果优于阴离子聚丙烯酰胺(APAM)和非离子型聚丙烯酰胺(NPAM)且当CPAM掺量为0.4‰时,清液析出量最多;CPAM与APAM相比,前者对于泥浆的絮凝主要通过吸附电中和作用进行,而APAM由于其相对分子质量较大,可以同时发挥吸附桥架作用和吸附电中和作用;随着各絮凝剂用量的增加,絮凝完成后泥浆中粘粒的含量逐渐减小,粉粒的含量逐渐增加。
The 341 provincial highway Mashan to Yixing Zhoutie section YMA02 Zhushan Lake line area adopts the cofferdam open-cut method for construction. The lake bottom contains a large amount of dredged silt, and the unreasonable treatment of silt will cause huge environmental pressure on the surrounding area. The silt itself is a natural resource, and it is also a waste of resources if it is directly transported for disposal. In view of this, this paper adopts flocculation test and particle grading test to analyze the influence of flocculant type and content on mud flocculation effect, and reveals the flocculation mechanism and particle size change law of mud in the flocculation process. The research results show that the flocculation effect of cationic polyacrylamide(CPAM) is better than that of anionic polyacrylamide(APAM) and non-ionic polyacrylamide(NPAM), and when the content of CPAM is 0.4‰, the amount of clear liquid is the largest;CPAM Compared with APAM, the flocculation of the mud is mainly carried out by adsorption electric neutralization of the former, and APAM can play the role of adsorption bridge and adsorption electric neutralization at the same time due to its relatively large molecular weight;with the increase of the amount of each flocculant After the flocculation is completed, the content of clay particles in the mud gradually decreases, and the content of powder particles gradually increases.
作者
党星赛
谢靖宇
洪钊
闫海军
杨奎
刘雨
Dang Xingsai;Xie Jingyu;Hong Zhao;Run Haijun;Yang Kui;Liu Yu(China Communications Construction Co.,Ltd,Nanjing 211100,China;JSTI Group,Nanjing 210019,China;School of Civil Engineering and Transportation,Hohai University,Nnajing 210098,China)
出处
《科技通报》
2022年第2期67-72,共6页
Bulletin of Science and Technology
基金
中央高校基本科研业务费专项资金资助(B200204036)
国网福建省电力有限公司科技项目(52130419002H)。
关键词
泥浆
絮凝
含水率
处理效果
颗粒级配
mud
flocculation
moisture content
treatment effect
particle gradatio
