工业固废稳定膨胀土化学改良及在高边坡防护应用  

Chemical improvement of industrial solid waste stabilized expansive soil and its application in high slope protection

作　　者：王杰 杨晓杰 王风华 WANG Jie;YANG Xiaojie;WANG Fenghua(Henan Nandeng Expressway Co.,Ltd.,Zhengzhou 450003,China;China Railway Seventh Bureau Group Zhengzhou Engineering Co.,Ltd.,Zhengzhou 450016,China)

机构地区：[1]河南省南邓高速公路有限公司,河南郑州450003 [2]中铁七局集团郑州工程有限公司,河南郑州450016

出　　处：《粘接》2025年第4期83-86,共4页Adhesion

摘　　要：针对膨胀土高边坡防护的不利工程特性,采用工业固废进行边坡膨胀土化学改良试验,研究工业固废稳定边坡膨胀土的力学性能、膨胀率、耐水性等。结果表明:随着工业固废掺量的增加,利用工业固废稳定处理后的边坡膨胀土的剪切强度、承载力、粘聚力和内摩擦角均逐渐增大;土体的膨胀率呈降低趋势,经改性后变为非膨胀土;不同干湿循环后的质量和强度损失有了明显的改善,试件表面湿润角呈现增大趋势,由亲水性向憎水性开始转变,水稳定性得到大幅提升;微观结构孔隙逐渐减少,形成类似于岩石的密实结构,与宏观试验测试结果相吻合。利用工业固废稳定处理后的边坡膨胀土能显著提高土体的物理特性,可用于天然膨胀土边坡的土壤性质改良,增强边坡稳定性。Aiming at the unfavorable engineering properties of expansive soil in high slopes,chemical improvement of slope expansive soil using industrial solid waste was conducted through experiments.The mechanical properties,swelling rate,and water resistance of expansive soil stabilized by industrial solid waste were investigated.The results show that with the increase of industrial solid waste content,the shear strength,bearing capacity,cohesion,and internal friction angle of the slope expansive soil treated with industrial solid waste gradually increase.The swelling rate of the soil decreases and it becomes non-expansive after modification.The mass and strength losses after different dry-wet cycles are significantly improved.The wetting angle on the surface of the specimen increases,shifting from hydrophilic to hydrophobic,and the water stability is greatly enhanced.The microstructure shows a gradual reduction in pore space,forming a dense structure similar to rock,which is consistent with the macroscopic experimental results.The expansive soil in the slope treated with industrial solid waste can significantly improve the physical properties of the soil,which can be used for the soil property improvement of natural expansive soil slopes and enhance slope stability.

关 键 词：工业固废 边坡膨胀土 化学改良 膨胀率 耐水性能 微观结构 

分 类 号：TQ172.44[化学工程—水泥工业] U415[化学工程—硅酸盐工业]