玄武岩纤维-碱液加固黄土的强度和渗透特性研究  

Study on strength and permeability of basalt fiber-alkali solution reinforced loess

作　　者：王晓强[1] 高富强[1] WANG Xiaoqiang;GAO Fuqiang(School of Civil Engineering,Luoyang Institute of Technology,Luoyang 471023,China)

机构地区：[1]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《人民长江》2022年第12期167-172,共6页Yangtze River

基　　金：国家自然科学基金项目(51204096);河南省高校科技创新人才基金资助项目(17HASTIT033)。

摘　　要：为了探明玄武岩纤维-碱液加固黄土的抗压强度和渗透特性演变特征,采用正交设计法,开展了无侧限抗压强度试验和渗透特性试验,并通过极差分析和方差分析相结合的方法研究了玄武岩纤维掺量、纤维长度、碱液浓度等因素对抗压强度和渗透系数的影响。试验结果表明:玄武岩纤维-碱液加固黄土的作用显著,影响纤维-碱液加固黄土无侧限抗压强度的主次因素依次为:碱液浓度、玄武岩纤维掺量、玄武岩纤维长度,而影响渗透系数的主次因素依次为:玄武岩纤维掺量、碱液浓度、玄武岩纤维长度;纤维掺量0.3%、纤维长度3 mm、碱液浓度1.5 mol/L时纤维-碱液加固黄土的无侧限抗压强度最大,纤维掺量0.9%、纤维长度9 mm、碱液浓度1.0 mol/L时渗透系数最小;纤维加筋与碱液加固共存的情况下,碱液生成的胶体会进一步增强颗粒与颗粒之间的连接、颗粒与纤维间的握裹作用力以及纤维与纤维之间的交织作用。In order to explore the evolution characteristics of compressive strength and permeability characteristics of basalt fiber-alkali solution reinforced loess,the unconfined compressive strength test and permeability test were carried out by orthogonal design method.The effects of basalt fiber content,fiber length and alkali concentration on compressive strength and permeability coefficient were studied by range analysis and variance analysis.The results showed that the unconfined compressive strength and permeability coefficient of loess reinforced with basalt fiber alkali solution were significant,the primary and secondary factors affecting the unconfined compressive strength of loess reinforced with basalt fiber alkali solution were alkali concentration,basalt fiber content and basalt fiber length;while the primary and secondary factors affecting the permeability coefficient of loess reinforced with basalt fiber alkali solution were basalt dimension content and alkali content.The maximum unconfined compressive strength was obtained when the fiber content was 0.3%,the fiber length was 3 mm and the alkali concentration was 1.5 mol/L;the minimal permeability coefficient was obtained when the fiber content was 0.9%,the fiber length was 9 mm and the alkali concentration was 1.0 mol/L.In the case of coexistence of fiber reinforcement and alkali solution reinforcement,the colloid formed by the alkali solution further enhanced the connection between particles,the bonding force between particles and fibers,and the interlacing effect between fibers.

关 键 词：黄土加固 无侧限抗压强度 渗透特性 正交设计 极差分析 方差分析 

分 类 号：TU444[建筑科学—岩土工程]