摘要
海南东环铁路A,B组填料稀缺,设计填料利用路堑挖方和隧道弃方为主,但其料源60%以上为全风化花岗岩C,D组,需进行改良才能满足工程要求。结合勘察设计,全线选取了有代表性的10组D类填料和10组C类填料进行改良研究,提出了最佳改良方案:高液限的全风化花岗岩用石灰改良,掺量为9%;低液限全风化花岗岩用水泥改良,掺量为5%。试验结果为设计和施工提供了依据,解决了海南东环线A,B组路基填料稀缺的重大工程问题。
Hainan East Ring Railway lacks of A and B class filling material.Design fillings are mainly from excavation and tunnel discard,but above 60 % is C,D class decomposed granite,which shall be improved to satisfy engineering requirement.Combined with investigation design,10 groups of D-class filling and 10 groups of C-class filling are conducted improvement test for the whole line,and the best improvement program is put forward.Decomposed granite with high hydraulic limit shall be improved with lime,with mixing proportion of 9 % and that with low hydraulic limit shall be improved with cement,with mixing proportion of 5 %.The test result can be reference for design and construction and has settled the major engineering problem of A,B class foundation fillings scarcity for Hainan East Ring Railway.
出处
《路基工程》
2010年第3期157-159,共3页
Subgrade Engineering
关键词
全风化花岗岩
路基填料
改良试验
decomposed granite
foundation fillings
improvement test
