摘要
为了研究膨胀土的特性,结合益娄高速公路的实例,通过室内试验分析膨胀土的工程特性,然后判别膨胀土的强弱等级,再确定处治方法。在益娄高速的施工中,为了充分利用当地膨胀土,预防膨胀土发生湿胀干缩破坏,决定采用6%的石灰改良膨胀土的包边法进行处治。经过离心机模拟试验发现:路基包边厚度为3.5m、填筑高度不超过6m时,包边法处治效果较好。
The engineering characteristics of expansive soil were analyzed through laboratory tests based on the actual case of Yilou expressway. Treatment method was then determined by the strength level of expansive soil. During the construction of Yilou expressway, in order to make full use of local expansive soil and prevent swelling and shrinkage, it was decided to use the modified expansive soil that contains 6 percent of lime for treatment by edging method. After a centrifuge simulation test, it was found that when the thickness of the subgrade edge is 3.5 m and the filling is not higher than 6 m, the treatment effect of the edging method is good.
作者
苏伟
文畅平
陈宗辉
SU Wei;WEN Chang-ping;CHEN Zong-hui(School of Civil Engineering and Mechanics,Central South University of Forestry and Technology,Changsha 410004,Hunan,China)
出处
《筑路机械与施工机械化》
2018年第6期49-54,共6页
Road Machinery & Construction Mechanization
基金
湖南省重点学科建设项目(2013ZDXK006)
关键词
路基施工
膨胀土
工程特性
包边法
subgrade construction
expansive soil
engineering characteristic
edging method
