红河蒙自膨胀土改良的膨胀特性试验研究  

Experimental Study on Expansion Characteristics of Honghe Mengzi Expansive Soil Improvement

作　　者：李艳林 巫益 徐宗明 许汉华 Li Yanlin;Wu Yi;Xu Zongming;Xu Hanhua(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.Ltd.,Kunming,Yunnan 650051;Yunnan Key Laboratory of Geotechnical Engineering and Geohazards,Kunming,Yunnan 650051)

机构地区：[1]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051 [2]云南省岩土工程与地质灾害重点实验室,云南昆明650051

出　　处：《江西建材》2024年第4期58-61,共4页

摘　　要：工程建设中,当特殊土作为路基时,通常要对其进行土质改良处理。西南地区膨胀土分布广泛,文中以红河蒙自某工程的膨胀土为例,就地取材,以不同掺量的石灰、粉煤灰以及水泥对膨胀土进行改良,研究改良后的膨胀土膨胀特性变化规律。结果表明,随着石灰、粉煤灰、水泥掺入量的增多,改良膨胀土的膨胀率逐渐降低,膨胀力也逐渐减小。三种掺料在相同的掺量情况下,膨胀率、膨胀力的减小程度与改良效果依次为:掺入石灰的改良土>掺入水泥的改良土>掺入粉煤灰的改良土。In engineering construction,when special soil is used as the roadbed,it is usually necessary to carry out soil improvement treat-ment.Expansive soil is widely distributed in the southwest region.Taking the expansive soil of a project in Honghe Mengzi as an example,this article takes local materials and improves the expansive soil with different dosages of lime,fly ash,and cement to study the changes in the ex-pansive characteristics of the improved expansive soil.The research results indicate that with the increase of lime,fly ash,and cement con-tent,the expansion rate of improved expansive soil gradually decreases,and the expansion force also gradually decreases.At the same dosage,the degree of reduction in expansion rate,expansion force,and improvement effect of the three types of admixtures are in the following order:improved soil with lime added>improved soil with cement added>improved soil with fly ash added.

关 键 词：土质改良 膨胀土 膨胀率 膨胀力 

分 类 号：TU47[建筑科学—结构工程]