石灰改良淤泥质土的试验研究  

Experimental Study on Lime Improved Mucky Soil

作　　者：陈一新[1,2] 王保田[1,2] 张永奇[1,2] 陈文轩[3] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程研究所,南京210098 [3]河海大学土木与交通学院,南京210098

出　　处：《科学技术与工程》2014年第34期273-277,共5页Science Technology and Engineering

摘　　要：以拟建杨林船闸淤泥质土开挖料综合利用作为研究对象,以石灰作为改良剂,对不同掺灰量的改良淤泥质土进行砂化试验、击实试验、界限含水率试验、直剪试验和压缩试验。试验研究结果表明:采用掺石灰的改良方法,能够快速降低淤泥质土的含水率,使土体从块状变成散粒状;随着掺灰量的增加,石灰改良土最大干密度减小,最优含水率增加;掺灰量对液塑限的影响较大;随着掺灰量的增加,石灰改良土的内摩擦角和黏聚力C显著增大,压缩性显著降低。Taking the comprehensive utilization of mucky soil excavated material in the proposed Yanglin locks as the research object and lime as modifier,the tests of sandy,compaction,limit water content,direct shearing and compression in relation to lime improved soil with different ash contents were carried out. The results show that using the modified method of lime can rapidly reduce the water content of mucky soil,and change the soil from the bulk into granular; with the increase of the ash content,the maximum dry density of the lime improved soil decreases and the optimal water content increases; the effect of the ash content on the limit water content is large; especially on the plastic limit and plastic index; as the increase of the ash content,the angle of internal friction and the cohesion may both increase,and compressibility significantly decreased.

关 键 词：淤泥质土 石灰改良 砂化 抗剪强度 压缩性 

分 类 号：TU447[建筑科学—岩土工程]