摘要
针对宁夏扶贫扬黄灌溉工程固海扩灌第四泵站及干渠硫酸盐盐渍土的盐胀规律及特性进行研究,主要是分析硫酸盐盐渍土对水利工程混凝土构筑物的破坏机理,通过现场取样并在室内进行单次降温膨胀试验,得出了硫酸盐盐渍土盐胀特性及其影响因素.盐渍土膨胀变形与土中硫酸钠含量的增加、初始干密度的增大、温度的降低密切相关,剧烈膨胀变形的温度区间集中在15^-5℃.
Study on the rules and properties of salt expansion of sulfate saline soil in the fourth pumping station and the trunk of Ningxia poor support and Yellow River pumping irrigation project,the sulfate saline soils damage mechanism on the irrigation project is found out,especially for the concrete structures.By field sampling and a single indoor test for lower the temperature expansion,the expansion characteristics and factors of sulfate saline soil were obtained.The saline soil expansion deformation are closely related with the rising sodium content of the soil,the increases initial dry density,the decrease of temperature.Severe expansion deformation is concentrated in the temperature range of 15 ℃ to-5 ℃.
出处
《宁夏工程技术》
CAS
2010年第4期372-375,共4页
Ningxia Engineering Technology
关键词
盐渍土
温度变化
盐胀
含盐量
saline soil； temperature changing； salt expansion； salt；
