摘要
淤泥固化处理技术是解决洞庭湖北部垸内沟渠清淤问题,并实现淤泥资源化利用的一个重要方法。基于洞庭湖北部安乡县垸内沟渠清淤后,采用淤泥固化土填筑路基试验资料的分析,探讨了水泥加偏铝酸钠固化淤泥形成的淤泥固化土的物理力学性能以及微观结构。结果表明:水泥掺量对淤泥固化土的抗压强度影响最大,其主次关系为水泥掺量>泥浆掺量>固化剂掺量,最优配比为泥浆掺量为9.6 kg,水泥掺量为1.07 kg,固化剂掺量为0.43 g;通过电镜扫描可知,偏铝酸钠能极大地促进水泥水化反应进行,其产物能显著提高淤泥固化淤泥中颗粒间的结合力。根据这一研究成果,提出了洞庭湖北部垸内沟渠淤泥固化土填筑路基施工工序,为促进淤泥的资源化利用提供了依据。
Silt solidification treatment technology is an important way to solve the problem of clearing silt in dike in the north of Dongting Lake and realize the reclamation of silt.Based on an analysis of the test data of filling roadbed with silt solidified soil after the dredging of the ditches in Anxiang County,North Dongting Lake,this paper discusses the physical mechanical properties and microstructures of silt solidified soil formed by cement and sodium meta-aluminate solidified silt.The results show that the cement content has the greatest influence on the compressive strength of the silt solidified soil.The primary and secondary relationship is the cement content,>mud content,>curing agent content.The optimal ratio is 9.6 kg mud content,1.07 kg cement content and 0.43 g curing agent content.It can be seen from the scanning electron microscope that sodium meta-aluminate can greatly promote the hydration reaction of cement,and its products can significantly improve the binding force between particles in the solidified sludge.According to the research results,the construction procedure for filling subgrade with silt solidified soil from the ditch in North Dongting Lake is put forward,which serves as a basis for promoting the resource utilization of silt.
作者
田大作
TIAN Da-zuo(Hunan Institute of Water Resources and Hydropower Sciences Changsha 410007, China)
出处
《中国农村水利水电》
北大核心
2019年第12期141-144,共4页
China Rural Water and Hydropower
基金
湖南省水利科技计划项目(洞庭湖垸内沟渠综合治理示范研究(湘水科计[2016]194-35))
关键词
洞庭湖北部垸内沟渠
淤泥
水泥-偏铝酸钠固化
物理力学指标
Northern Dikes of Dongting Lake Ditch
silt
cement-sodium meta-aluminate solidification
physical and mechanical indicators
