颗粒组成对冰水堆积土路基填料工程特性的影响

在我国大陆西部地区,冰水堆积地貌较为多见,冰水堆积物数量巨大且分布广泛。这些地区工程地质条件较为特殊,冰水堆积物组成和结构均较为复杂,且不同地域或同一地域不同地区冰水堆积土特性差异巨大,给当地工程施工建设带来巨大困难。以蒲都高速TJ-8标路基工程为依托,通过开展颗粒分析试验、界限含水率试验、击实试验等,分析颗粒组成、颗粒级配、粗颗粒含量、细颗粒含量对冰水堆积土路基填料特性的影响。结果表明,冰水堆积土细粒土的压实特性与其颗粒含量存在较好的多元函数关系,为科学指导现场调整填料颗粒级配提供了依据。

Effect of Particle Composition on Engineering Characteristics of Glacial Deposit Soil Filling for Subgrade

In the southwest of China,glacial deposit landform is very common,and glacial deposits are abundant and widely distributed.These areas have special engineering geological conditions and the characteristics of glacial deposit soil vary greatly in different regions or even in the same region because of its complicated composition and structure,which brings great difficulties to the local engineering construction.Based on the TJ-8 bid section of Pujiang-Dujiangyan Expressway,in the paper,the influence of particle composition,particle gradation,coarse particle content and fine particle content on the characteristics of glacial deposit soil subgrade filling are analyzed through particle analysis test,limit moisture content test and compaction test.The results show that there is a good multivariate function relationship between the compacting characteristics and the particle content of the glacial deposit soil,which provides a basis for the scientific guidance on the field adjustment of the particle grading of glacial deposit soil filling.