石灰改良土浸水稳定性及其影响因素研究  

Water Stability and Influencing Factors of Lime-improved Soil

作　　者：赵利强 ZHAO Liqiang(Shanxi Jiaoke Survey&Design Institute Co.,Ltd.,Taiyuan,Shanxi 030032,China)

机构地区：[1]山西交科公路勘察设计院有限公司,山西太原030032

出　　处：《山西交通科技》2024年第3期27-29,34,共4页Shanxi Science & Technology of Transportation

摘　　要：为了研究石灰改良黄土在长期浸水条件下的强度劣化特性,采用振动法成型石灰改良黄土试件,研究了浸水时间、压实系数和石灰剂量对无侧限抗压强度的影响。结果表明:浸水时长相同时,石灰改良黄土抗压强度随石灰剂量和压实系数的增大而增大;随着浸水时间的延长,石灰改良黄土7 d抗压强度先增高后降低,28 d强度持续降低;在相同浸水条件下,石灰剂量、压实系数的增大,均对石灰改良黄土抵抗长期浸水带来的负面影响有促进作用。To study the strength deterioration characteristics of lime-improved loess in long-term water immersion conditions,lime-improved loess specimens were molded by the vibration method,and the influences of the water immersion time,compaction coefficient,and lime content on the unconfined compressive strength were investigated.The results showed that when the water immersion time was the same,the compressive strength of the lime-improved loess increased with the increase of the lime content and compaction coefficient;when the water immersion time increased,the 7-d compressive strength increased first and then decreased,and the 28-d compressive strength continuously decreased.Under the same immersion conditions,the increase in lime content and compaction coefficient contributed to the resistance of lime-improved loess to the negative effects of long-term immersion.

关 键 词：黄土 石灰 水稳定性 力学强度 浸水时间 

分 类 号：U412.222[交通运输工程—道路与铁道工程]