摘要
采用水泥改良细粒含量46. 53%的粉细砂,并对该粉细砂进行干湿循环试验,比较不同影响因素对改良土耐久性的影响。试验结果表明:水泥掺量11%、压实系数0. 95、含水率高于最优含水率1%时,水泥改良土无侧限抗压强度最高;在经济性和适用性方面,水泥掺量5%的粉细砂改良土优于水泥掺量8%和11%的粉细砂改良土。
Cement was used to improve the fine silt with fine grain content of 46.53%,dry and wet cycle test was carried out on the fine silt,and the influences of different factors on the durability ofimproved soil were compared.The test results show that the unconfined compressive strength of the cement-improved soil is the highest when the cement content is 11%,the compaction coefficient is 0.95 and the water content is 1%higher than the optimal water content,and the fine silt improved soil with cement content of 5%is better than the fine silt improved soil with cement content of 8%and 11%in terms of economy and applicability.
作者
张保卫
ZHANG Baowei(China Railway Lanzhou Bureau Group Co. Ltd. ,Xuchang Henan 73000,China)
出处
《铁道建筑》
北大核心
2019年第2期54-56,共3页
Railway Engineering
基金
中国铁路总公司科技研究开发计划(2016G003-J)
关键词
铁路路基
粉细砂
试验研究
填料改良
干湿循环
耐久性
Railway subgrade
Fine silt
Experimental study
Filling improvement
Dry and wet cycle
Durability
