摘要
由土-膨润土组成的阻隔墙在干湿循环条件下及重金属侵蚀后,强度和渗透性能严重衰减。为研究强度和渗透性能劣化程度,文中通过干湿循环条件下强度试验和渗透试验,分析无侧限强度和渗透系数的变化规律。结果表明,随着干湿循环次数的增加,无侧限强度降低和渗透系数增大,6次循环后,强度只有原来的50%左右,而渗透系数增大了几个数量级,同样循环次数下,重金属锌离子的侵入,使强度下降一半以上,渗透系数增大一个数量级。
The strength and permeability properties of the barrier wall composed of soil-bentonite were severely degraded under dry and wet cycling conditions and after heavy metal erosion.In order to study the degree of deterioration of strength and permeability performance,the change rule of unconfined strength and permeability coefficient was analysed through the strength test and permeability test under dry and wet cycling conditions.The results show that with the increase of the number of dry and wet cycles,the unconfined strength decreases and the permeability coefficient increases,and the strength is only about 50%of the original after 6 cycles,while the permeability coefficient increases by several orders of magnitude;under the same cycle number,the invasion of heavy metal zinc ions will cause the strength to decrease by more than half,and the permeability coefficient increases by one order of magnitude.
作者
沈良飞
Shen Liangfei(Zhongyuan Construction Group Co.Ltd.,Jiaxing,Zhejiang 314001)
出处
《江西建材》
2023年第12期65-67,共3页
Jiangxi Building Materials
关键词
土-膨润土阻隔墙
干湿循环
锌离子
强度
渗透
Soil-bentonite barrier wall
Wet-dry cycling
Zinc ions
Strength
Permeability
