不同改性材料改良硫酸盐渍土的击实特性试验研究  

Experimental Study on Compaction Properties of Vitriol Saline Soil When Adding Different Modifier

作　　者：张卫芳[1] 杨俊[2] 李浩 陈英恺 杨哲[1] 畅泽文 

机构地区：[1]空军后勤部机场营房部,北京100720 [2]空军装备研究院,北京100085 [3]沈阳军区空军机场工兵勤务队,辽宁沈阳110016 [4]空军第三空防工程处,河北保定071000

出　　处：《施工技术》2013年第S2期100-103,共4页Construction Technology

摘　　要：选取石灰和水泥2种材料作为改良材料,设计了15种改良方案,通过室内击实试验研究了不同方案对不同含盐量盐渍土击实特性的改良效果,综合考虑造价和改良效果对各方案进行了综合评价,结果表明:盐渍土含盐量影响土样的击实效果,掺入石灰、水泥后,盐渍土样变得不容易击实,随着掺量增加,最大干密度逐渐减小,最优含水量逐渐变大;石灰的改良效果不如水泥,综合考虑性价比,在较低含盐量(低于1%)工程中宜选用水泥,反之宜选用石灰,且混合掺2种材料要优于单独掺1种材料。This paper chooses the lime and cement as modifier and designs 15 kinds of improvement plan,using the moisture-density test to study the improved effect of different plans,comprehensive assessment has been done after taking price and improved effect into account,the results show that,the salt content of saline soil can affect its compaction properties, saline soil becomes hard to compaction after add lime or cement,as the amount of lime and cement increase,the maximum dry density decreases and optimal moisture content increases. Cement has a better improved effect than lime,from the cost performance point,it is better to use cement to improve the compaction properties in low saltness project,using lime conversely,and using the two kinds of materials at the same time has a better improved effect than using one alone.

关 键 词：公路工程 路基 盐渍土 击实特性 石灰 水泥 

分 类 号：U416.166[交通运输工程—道路与铁道工程]