弱膨胀土路基设计方法与施工技术研究  

Research on Design Method and Construction Technology of Weak Expansive Soil Subgrade

作　　者：覃俊飞 QIN Junfei(Guangxi Branch of Hunan Architectural Design Institute Group Co.,Ltd.,Liuzhou 545000,Guangxi,China)

机构地区：[1]湖南省建筑设计院集团股份有限公司广西分公司,广西柳州545000

出　　处：《工程技术研究》2024年第13期180-182,共3页Engineering and Technological Research

摘　　要：由于膨胀土具有吸水膨胀、失水收缩的特性,在工程建设过程中易起到较大的破坏作用,要想保证工程质量,需有效防止膨胀土危害。文章通过对膨胀土的特性与分类进行阐述与分析,总结了弱膨胀土路基设计方法及施工技术,并以某公路为例,分析弱膨胀土路基干密度衰减情况和碾压施工质量,结果表明,干密度值随龄期的增加而减少,压实度也随龄期增加而减小,其衰减程度逐渐增大;碾压次数并非是越多越好,可依据土密度的稳定状况确定合适的碾压次数。Because expansive soil has the characteristics of water absorption expansion and water loss shrinkage,it is easy to play a greater destructive role in the process of engineering construction.In order to ensure the engineering quality,it is necessary to effectively prevent the harm of expansive soil.The characteristics and classification of expansive soil are expounded and analyzed,and the design method and construction technology of weak expansive soil subgrade are summarized.Taking a highway as an example,the attenuation of dry density and the quality of rolling construction of weak expansive soil subgrade are analyzed.The results show that the dry density value decreases with the increase of age,and the degree of compaction also decreases with the increase of age,and the degree of attenuation increases gradually.The number of rolling times is not the more the better,and the appropriate number of rolling times can be determined according to the stability of soil density.

关 键 词：膨胀土 路基设计 干密度 压实度 

分 类 号：U416[交通运输工程—道路与铁道工程]