福建农林大学学报（自然科学版）2024，Vol.53Issue(1)：106-113,8.DOI:10.13323/j.cnki.j.fafu(nat.sci.).202302006
游离氧化铁对崩岗不同土层土壤胀缩特性的影响
Effect of free iron oxide on swelling-shrinkage characteristics of collapsing hill soils in different layers
摘要
Abstract
[Objective]The study aimed to investigate the effect of free iron oxide on the soil swelling and shrinkage characteristics of different soil layers in the collapsing hill.[Method]Analyze the influence of free iron oxide on the soil swelling and shrinkage char-acteristics of different soil layers in the collapsing hill by using the no-load expansion test,linear shrinkage test,and calculation of the sliding layer thickness in the soil colloid diffusion double layer.[Result]The content of free iron oxide have a great significant linear increasing relationship with the no-load expansion rate of the collapse wall soil(P＜0.01),and a significant linear decreasing relationship with the linear shrinkage rate of the soil(P＜0.05);In the same electrolyte concentration,the thickness of the sliding layer of the collapsed soil showed an increasing trend with the increase of free iron oxide;there was a significant positive correlation(P＜0.05)between the thickness of soil sliding layer and the no-load expansion rate of red soil and sandy soil with different free iron oxide content(P＜0.05),and a significant negative correlation(P＜0.05)with the final shrinkage rate.[Conclusion]The change of free iron oxide content can affect the thickness of soil sliding layer and then affect the expansion and shrinkage properties of soil.关键词
崩岗/游离氧化铁/无荷膨胀率/线性收缩率/扩散双电层滑动层Key words
collapsing hill/free iron oxide/no-loading expansion rate/linear shrinkage rate/diffuse electric double layer分类
农业科技引用本文复制引用
卢政铧,陈文祥,李灿娥,章智,张越,蒋芳市,葛宏力,黄炎和,林金石..游离氧化铁对崩岗不同土层土壤胀缩特性的影响[J].福建农林大学学报（自然科学版）,2024,53(1):106-113,8.基金项目
国家自然科学基金项目(41571272、41907043). （41571272、41907043）
