南疆铁路改良盐渍土无侧限抗压强度试验研究  

Experimental Research on Unconfined Compressive Strength of the Improved Saline Soil at the South of Sinkiang

作　　者：余云燕[1] 赵德安[1] 彭典华[1] 马惠民 金培杰 侯殿英 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中铁西北科学研究院,甘肃兰州730000

出　　处：《兰州交通大学学报》2008年第4期9-13,共5页Journal of Lanzhou Jiaotong University

基　　金：铁道部科技发展计划重点课题(2004G034);兰州交通大学"青蓝"人才工程基金(QL0507A)

摘　　要：针对南疆铁路路基盐渍土病害特点,从工程应用角度出发,利用氯化钙、水泥、消石灰和粉煤灰对盐渍土进行改良,系统研究了不同改良方案、龄期、浸水饱和、冻融及冻融循环次数、压实系数等因素对改良盐渍土无侧限抗压强度的影响,比较了不同改良盐渍土的强度破坏特征.试验结果表明:南疆铁路路基填料适合用水泥、石灰和粉煤灰来改良,强度满足规范要求,在现场试验段也得到验证.According to the problem of diseases caused by saline soil at the railway bed of the south of SinKing, saline soil is improved by calcium chloride, cement, hydrated lime and fly ash for the engineering application. The influence of mixing material ratio, curing period, soaked saturation, cycle of freezing and thawing and compaction coefficient on unconfined compressive strength of the improved saline soil are systematically studied. The experimental results show that unconfined compressive strength of the improved saline soil satisfies code requirements while saline soil of the railway bed of the south of Sinking is mixed with cerecur, hydrated lime and fly ash to change the strength character,which is verified in site working.

关 键 词：盐渍土 路基填料 改良盐渍土 无侧限抗压强度 

分 类 号：TU411.7[建筑科学—岩土工程]