聚丙烯酰胺(PAM)改良黄泛区粉土堤防水理特性试验  

Experiment on the Water Management Characteristics of Silt Embankments Improved by Polyacrylamide (PAM) in Flooded Area of the Yellow River

作　　者：马少春[1,2,3] 刘宴利 鲍鹏 潘艳辉[4] 郭成超 MA Shaochun;LIU Yanli;BAO Peng;PAN Yanhui;GUO Chengchao(School of Architecture Engineering/Kaifeng Research Center for Engineering Repair and Material Recycle,Henan University,Kaifeng 475004,China;Yellow River Laboratory,Zhengzhou University,Zhengzhou 450001,China;Henan Provincial Engineering Research Center on Intelligent Protection and Restoration of Historical Buildings,Kaifeng 475004,China;School of Architectural Engineering,Huanghuai University,Zhumadian 463000,China)

机构地区：[1]河南大学建筑工程学院/开封市工程修复与材料循环工程技术研究中心,河南开封475004 [2]黄河实验室(郑州大学),河南郑州450001 [3]河南省历史建筑智能保护与修复工程研究中心,河南开封475004 [4]黄淮学院建筑工程学院,河南驻马店463000

出　　处：《人民黄河》2025年第1期148-153,共6页Yellow River

基　　金：中国博士后科学基金面上项目(2018M632805);河南省科技攻关项目(232102321066);市级企业技术开发项目(160122785001);开封市科技攻关项目(2303001)。

摘　　要：为解决堤防粉土难压实、黏结性差、遇水易浸透、流失等问题,利用高分子聚合物聚丙烯酰胺(PAM)对粉土进行改良,研究了PAM改良土的水理特性,分析了PAM对土-水特征曲线的影响规律。结果表明:PAM对土体进气值和残余含水率影响较大,但对土体脱湿速率影响较小。在相同基质吸力下,改良土的体积含水率和残余含水率随PAM掺量增加呈先增大后减小趋势,表明其持水性增强。对改良土的水稳性进一步分析发现,短时间和长时间改良土的崩解率均随PAM掺量增加而减小,表明PAM对粉土的耐崩解性有较好的提升效果。当掺量为1.0%~1.2%时,改良土样基本未发生崩解,水稳性相对较强。研究成果对预防粉土病害,堤防安全,附近或上部历史建筑的结构安全、保护等均具有重要意义。In order to solve the issues of hard compaction,poor cohesiveness,easy penetration in water and loss of dike silt,in this paper,the polymer polyacrylamide(PAM) was used to improve the silt,the hydraulic characteristics of PAM-improved soil were studied,and the influence law of PAM on the soil-water characteristic curve was found.The results show that PAM has a great influence to the air intake value and residual moisture content of the soil,but has a small effect on the soil dehumidification rate.Under the same substrate suction,the volumetric moisture content and residual moisture content of the improved soil are increased first and then decreased with the increase of PAM content,indicating that the water holding capacity is enhanced.Further analysis of the water stability of the improved soil shows that the disintegration rate of both short and long time improved soil decreases with the increase of PAM content,indicating that PAM has a good effect on the disintegration resistance of silt soil.When the dosage is 1%-1.2%,the modified soil sample does not experience significant disintegration and exhibits relatively strong water stability.The research results are of great significance for the prevention of silt diseases,the safety of levees,the structural safety,protection and utilization of nearby upper historic buildings.

关 键 词：改良土 PAM 堤防 水理特性 崩解试验 体积含水率 

分 类 号：TU449[建筑科学—岩土工程]