摘要
为湿陷性黄土EFS土壤固化剂适宜用量的确定以及生态环境防护提供科学依据,以湿陷性黄土为研究对象,在土壤含水率分别为5.51%、10.00%、15.00%、20.00%和25.00%条件下,研究EFS土壤固化剂含量为0(CK)、0.05%、0.10%、0.15%、0.20%和0.30%对湿陷性黄土物理特性的影响。结果表明:黄土强度,不同含水率黄土内摩擦角和黏聚力均随着固化剂含量的增加呈先升后降趋势,当固化剂含量为0.15%时,湿陷性黄土抗压强度最大,固化剂含量>0.15%后,黄土抗压强度随固化剂含量增加呈下降趋势;当含水率为15.00%,固化剂含量为0.15%时黄土强度最大;水分特征曲线,不同固化剂含量拟合方程中土壤持水曲线拟合参数A均低于CK,随着固化剂含量增加,CK的土壤持水曲线拟合参数A呈先减小后增大的变化趋势,添加固化剂湿陷性黄土的持水力减弱,且随固化剂含量的增加呈先增强后减弱趋势,土壤供水能力随固化剂含量的增加呈先减弱后增强趋势,当含水率为15.00%和固化剂含量为0.15%时,土壤持水力达最大,供水力最小,即黄土强度最大;比水容量,相同含水率时湿陷性黄土比水容量随固化剂含量的增加呈逐渐减小趋势,不同处理间均差异显著,当含水率为15.00%时,比水容量达最大,固化剂含量为0.05%、0.10%、0.15%、0.20%和0.30%时,其比水容量较CK分别下降0.68%、0.94%、2.10%、2.74%和3.26%。
The effects of 0(CK),0.05%,0.10%,0.15%,0.20%and 0.30%EFS soil stabilizer on physical properties of collapsible loess with 5.51%,10.00%,15.00%,20.00%and 25.00%soil water content are studied to provide the scientific basis for determining suitable dosage of EFS soil stabilizer in collapsible loess and protection of ecological environment.Result:Internal friction angle and adhesion of loess with different water content show a first rising and then declining trend with increase of soil stabilizer.When soil stabilizer content is 0.15%,the compressive strength of collapsible loess is the maximum.When soil stabilizer content is over 0.15%,the compressive strength of loess shows a declining trend with increase of soil stabilizer content.When soil water content and stabilizer content is 15.00%and 0.15%,the losses strength reaches the maximum.As to water characteristic curve,A(fitting parameter of soil water holding curve)of fitting equation in different stabilizer content is lower than CK.With increase of stabilizer content,A of CK shows a first decreasing and then increasing trend.The water holding capacity of collapsible loess decreases when adding stabilizer,and shows a first increasing and then decreasing trend with increase of stabilizer content.Soil water supply capacity shows a first decreasing and then increasing trend with increase of stabilizer content.When soil water content and stabilizer content is 15.00%and 0.15%,soil water holding capacity and water supply capacity reach the maximum and minimum respectively,that means,the losses strength is the maximum.Specific water capacity of collapsible losses shows a gradual decreasing trend with increase of stabilizer content under the same soil water content.There is a significant difference in specific water capacity among different treatments.When soil water content is 15.00%,specific water capacity reaches the maximum.The specific water capacity of losses adding 0.05%,0.10%,0.15%,0.20%and 0.30%stabilizer decreases by 0.68%,0.94%,2.10%,2.74%and 3.26%compared with C
作者
母冰洁
王康宏
MU Bingjie;WANG Kanghong(Hancheng Station of Water and Soil Conservation,Hancheng,Shaanxi 715400,China)
出处
《贵州农业科学》
CAS
2020年第8期44-47,共4页
Guizhou Agricultural Sciences
基金
国家水土保持重点项目“韩城市沿黄公路龙门、芝川片区综合治理工程”(2019)。
关键词
固化剂
土壤强度
持水性
土壤水分特征
stabilizer
soil strength
water holding capacity
soil water characteristics
