摘要
针对湖泊疏浚淤泥有机质含量高、含水率高、强度低等特点,采用水泥、生石灰和粉煤灰等添加剂对其进行固化研究,阐述淤泥固化后的短期强度和含水率变化特征,并对固化效果进行分析和总结。根据模糊优化理论,将固化效果、生产成本、工期等因素作为优化目标,建立数学模型,提出并分析固化剂混合添加方案,并对添加方案进行试验论证。结果表明,掺入4%的水泥和9%的粉煤灰为最优固化方案,强度增长约38%,成本降低约45%,该固化方案可满足相应的工程要求。
Based on the characteristics of lake＇s dredging sludge, i.e. high organic content, high water content and low strength, this paper investigates solidification tests with cement, lime and fly ash as improving additive. Proceeding from the changing characteristics of strength and water content after solidification, we study the solidification mechanism of the dredged sludge and analyze the solidification efficiency. According to the fuzzy optimization theory, an optimum model is set up with optimizing scheme of cost, efficiency and time, by which a best project is obtained and analyzed. Results show that the mixture additive of 4% cement and 9% fly ash can be chosen as the optimal scheme according to the model. Due to the mixture addition, the cost decreases about 45% and the shear strength increases to 38%, and this scheme meets the engineering requirements.
出处
《水运工程》
北大核心
2012年第12期230-233,共4页
Port & Waterway Engineering
关键词
疏浚淤泥
固化机理
强度
模糊优化
dredging sludge
solidification mechanism
strength
fuzzy optimization
