岩土工程学报2012，Vol.34Issue(5)：842-847,6.
天然粗粒盐渍土大型路堤模型试验研究
Large-scale model tests on embankment of crude coarse grained saline soil
摘要
Abstract
In Northwest China,there is great deal of crude coarse grained saline soil.If it can be used as embankment fill,full use of local resources will be made and construction cost of highways saved.In order to make the test results more accurately and to reflect the actual working conditions,based on two different chemical analysis tests,experiments of freeze thaw cycles,salt expansion tests under（no） additional load and large-scale immersed tests,large-scale model tests on embankment under freeze thaw cycles are performed.It is shown that the soluble salt obtained by two different test methods（standard method and screening method of 5 mm） is quite different,and the results from the screening method of 5 mm can better guide the construction.With the increase of moisture content,the values of salt expansion and collapsibility gradually increase,and the cumulative characteristics of collapsibility are obvious.The amount of salt expansion for the saline soil under additional covering load is less than 15%,compared with that under no additional load.After several freeze-thaw cycles,the maximum expansion rate of the large-scale embankment model is only 0.44%.The crude coarse grained saline soil can be used for embankment fill.关键词
道路工程/天然粗粒盐渍土/盐胀量/溶陷/模型试验Key words
road engineering/crude coarse grained saline soil/salt expansion/collapsibility/model test分类
建筑与水利引用本文复制引用
张莎莎,杨晓华,张秋美..天然粗粒盐渍土大型路堤模型试验研究[J].岩土工程学报,2012,34(5):842-847,6.基金项目
国家西部交通建设科技项目 （）
中央高校基本科研业务费专项资金资助项目 （）
