水泥黄土强度特性试验研究  

Experimental Study on Intensity Characteristic of Cement-improved Loess

作　　者：夏琼[1] 杨有海[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《土工基础》2008年第6期81-84,共4页Soil Engineering and Foundation

基　　金：铁道部科技开发计划项目(2004G029)

摘　　要：路基填料改良是高标准铁路建设的重要内容之一。结合兰新铁路兰（州）武（威南）复线，通过三轴固结不排水试验和无侧限抗压强度试验，对水泥黄土的强度特性进行研究，揭示多种因素（即掺合比、龄期、压实系数和含水量等）对水泥黄土强度的影响规律。掺合比、龄期及压实系数均对水泥黄土强度产生正相影响，而含水量对水泥黄土强度产生负相影响。作为铁路路基填料，并考虑施工拌合均匀度等因素，在黄土中掺3％～4％水泥即可满足使用要求。The improving of subgrade filling is important for high standard railway. Combining with the second line of Lanzhou- Wuwei Railway the intensity characteristic of cement-proved loess is studied by the triaxial non-drain consolidation test and un- confined compression test. The influence of multifactor （including ratio of cement admixed, age, compaction factor, water content etc. ） to intensity of cement-improved loess is provided. Mixing ratio, age and compaction factor positively affect the intensity of cement-improved loess, but there is negative correlation between water content and intensity of cement-improved loess. Considering the uniformity of mixing in constructing, loess mixed with 3%-4% cement can meet a demand for railway em-bankment filling.

关 键 词：水泥黄土 路基填料 强度特性 掺合比 龄期 

分 类 号：TU444[建筑科学—岩土工程] TU432[建筑科学—土工工程]