兰州新区膨胀土调查分析

Research Analysis of Lime-Soil Expansion in Lanzhou New Area

论文调查分析了兰州新区舟曲中学、中川机场和新区兰石厂的灰土膨胀现状及影响因素,并对舟曲中学已膨胀土体和新区14处场地地基原土进行了易溶盐含量分析。分析结果表明:兰州新区地基原土大部分都为非盐渍土无膨胀性。舟曲中学已膨胀灰土易溶盐含量明显高于舟曲中学素土和新区其他地区素土,且随着土样深度的增加已膨胀地基土易溶盐含量明显减小。石灰的加入使地基土易溶盐含量明显增加,进而引发了灰土地基的膨胀,此外毛细水的蒸发和温度也对灰土地基的膨胀有一定影响。

This paper analyzed gray soil expansion current situation and rule of the above three locations,moreover,analyzed soluble salt content of Zhouqu Middle School expansioned foundation soil and 14 place in New area.The results showed that: most of the original soil in Lanzhou New Area is non-salt soil.The soluble salt content of expansived lime soil in Zhouqu Middle School is obviously higher than that of ordinary soil in it and other areas of the new area,and with the increase of soil sample depth, the soluble salt content of expansive foundation soil decreases obviously.The addition of lime increases the content of easily soluble salt in the foundation soil,which in turn causes the expansion of the ash foundation.In addition,the evaporation and temperature of the capillary water also have an effect on the expansion of the ash foundation.