摘要
以高速铁路路基黄土填料为研究对象,制备不同水泥掺量的黄土填料试样及重塑黄土试样进行动力性质试验,并对水泥改良黄土试验路堤的稳定性进行了评价。结果表明:抗振陷能力最强时试样的水泥掺量为6%~7%,且该掺量的水泥改良黄土经1 500次振动后动弹性模量趋于稳定,阻尼比的增长幅度很小也趋于稳定;当压实系数、地基系数、动态变形模量等均满足规范要求时,水泥掺量6%~7%的改良黄土路堤在施工期及工后的沉降变形均能满足设计要求。
Taking the loess fiUing material of subgrade in high-speed railway as the research object, the loess filling material specimens with different cement content were prepared and the loess specimens were remolded for dynamic property test, and the stability of cement improved loess test embankment was evaluated. The results show that anti vibration depression capacity is the strongest when the cement content of specimens is 6% - 7%, the dynamic elastic modulus tends to be stable and damping ratio increases litde and tends to be stable too after the 1500 vibration of cement improved loess with this cement content, the settlement and deformation of improved loess embankment with cement content of 6% -7% could meet the design requirements during and after construction when the compaction coefficient, the foundation coefficient and the dynamic deformation modulus can meet the specification requirements.
出处
《铁道建筑》
北大核心
2017年第7期100-103,共4页
Railway Engineering
关键词
高速铁路路基
黄土填料
试验研究
水泥改良
动力试验
稳定性
High speed railway subgrade
Loess filling material
Experimental study
Cement improvement
Dynamic test
Stability
