复合相变材料性能调配及在应急堵漏中的应用  

Properties of Composite Phase Transition Material and Its Application in Underwater Emergency Plugging Test

作　　者：张盛行 汤雷[1] 贾宇[1,2] 王玉磊 ZHANG Shenghang;TANG Lei;JIA Yu;WANG Yulei(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China)

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《建筑材料学报》2020年第6期1496-1503,共8页Journal of Building Materials

基　　金：国家重点研发计划项目(2016YFC0401610,2018YFC0407102);重点实验室及修购专项项目(应急封堵水下渗漏通道的装备);国家自然科学基金重点项目(51739008)。

摘　　要：基于“水下熔化相变材料应急封堵渗漏通道”的方法,对不同配比的石蜡松香复合相变材料和硬脂酸松香复合相变材料进行流动性试验和单轴压缩试验,得到相应的材料特性,并选择性能较佳的复合相变材料在土槽模型中进行堵漏试验,分析了其堵漏效果.结果表明:在熔融状态下,随着松香掺量的增加,石蜡-松香复合相变材料的运动黏度呈指数函数的增长趋势,硬脂酸松香复合相变材料的运动黏度呈三次函数的增长趋势;松香的掺入使石蜡和硬脂酸由脆性转变为塑性,且随着松香掺量的增加,复合相变材料屈服应力逐渐增大,材料特性由应变软化转为应变硬化;与纯石蜡相比,松香掺量为20%的石蜡松香复合相变材料封堵用时更短,同周围土体结合更为密实,止水效果更好.Based on the method of“emergency sealing of leakage channels by underwater melting of phase transition materials”,the fluidity test and uniaxial compression test were carried out for paraffin-rosin and stearic acid-rosin composites with different proportions,and the properties of the materials with different proportions were obtained.Then,the composite material with better performance was selected for plugging test in the soil groove model,and the plugging effect was analyzed.Test results show that with the increase of rosin content the kinematic viscosity of paraffin-rosin composites increases exponentially while the kinematic viscosity of stearic acid-rosin composite increases in cubic function.The addition of rosin changed brittleness into plasticity.The yield stress increases and the properties of the material change from strain softening to strain hardening with the increase of rosin content.Compared with pure paraffin,paraffin-rosin composite material with 20%rosin has shorter sealing time,the combination with the surrounding soil is more compact and has better water plugging effect.

关 键 词：堤坝渗漏 相变材料 流动性 单轴压缩 水下封堵 

分 类 号：TV871.3[水利工程—水利水电工程]