张家口柳川河河道治理膨润土防水毯防渗性能影响研究  

Research on the Influence of Bentonite Waterproof Blanket on Anti-Seepage Performance in Zhangjiakou Liuchuanhe River Channel Remediation

作　　者：张超 ZHANG Chao(The First Engineering Co.,Ltd.of China Railway 18th Bureau Group Co.,Ltd.,Baoding 072750,China)

机构地区：[1]中铁十八局集团第一工程有限公司,河北保定072750

出　　处：《中国水能及电气化》2024年第9期51-56,共6页China Water Power & Electrification

摘　　要：随着我国工业技术的进步和社会经济的发展,工程实施过程中产生了大量的金属废水,对环境造成了较大的破坏。为了进一步掌握重金属离子对河道膨润土防水毯防渗效果影响规律,文章依托河北张家口柳川河河道清淤工程,对比分析了不同金属离子类型、离子浓度对传统针刺GCL和自制HDP GCL防渗效果的影响程度,研究结果表明:对于不同类型的离子溶液,渗透效果最强的为Cu 2+溶液,Zn 2+溶液略次之,最小的是Pb 2+溶液;4mm和7mm厚HDP GCL在离子溶液浓度大于1g/L时才会发生渗漏现象,且7mm HDP GCL防渗能力优于4mmHDP GCL和传统针刺GCL,表明影响HDP GCL防渗性能的关键因素是厚度。With the advancement of industrial technology and the development of social economy in China,a large amount of metal wastewater has been generated during engineering implementation,causing significant environmental damage.In order to further understand the impact of heavy metal ions on the anti-seepage effect of bentonite waterproof blankets in river channels,this paper relies on the dredging project of rivers in Zhangjiakou,Hebei Province.It comparatively analyzes the influence of different types of metal ions and ion concentrations on the anti-seepage effects of traditional needle-punched GCL(Geosynthetic Clay Liner)and self-made HDP(High Density Polyethylene)GCL.The research results indicate that among different types of ion solutions,the most penetrating effect is observed in Cu 2+solution,followed by Zn 2+solution,and the least is observed in Pb 2+solution.Leakage occurs in 4mm and 7mm thick HDP GCL only when the ion solution concentration exceeds 1g/L.Additionally,the anti-seepage ability of 7mm HDP GCL is superior to that of 4mm HDP GCL and traditional needle-punched GCL,indicating that the key factor affecting the anti-seepage performance of HDP GCL is thickness.

关 键 词：膨润土防水毯 金属废水 离子溶液浓度 防渗能力 

分 类 号：TV85[水利工程—水利水电工程]