【摘要】 结合南疆铁路路基病害整治工程,从就地取材、经济可行的原则出发,利用氯化钙、消石灰、水泥和粉煤灰等掺合料,确定6种改良方案,进行改良盐渍土的盐胀冻胀室内试验研究,并与重塑土作比较,为最优改良方案的确定提供依据.试验结果表明:盐渍土中掺入氯化钙或氯化钙和石灰能有效缓解盐胀冻胀的发生,掺入水泥、粉煤灰和石灰没有盐胀冻胀现象.该结论与现场试验段相一致.更多还原

【Abstract】 Saline soil was improved by calcium chloride,cement,hydrated lime and fly ash,and six schemes of improved saline soil were determined,according to the project of railway roadbed disease managing at south of Xinjiang.Laboratory testing of frost heave and salt expansion of each improved saline soil were studied,and experimental results compared with that of remolded soil.The results shows that the improved saline soil mixed with calcium chloride or calcium chloride and hydrated lime can efficiently decrease swell increment of frost heave and salt expansion,while it mixed with cement,hydrated lime and fly ash can completely restrain frost heave and salt expansion,which is verified in site working.更多还原