山西省朔州环城高速公路粉土的CBR试验研究  

CBR Experimental Study on Silt of Shuozhou Ring Expressway in Shanxi Province

作　　者：李权威 方剑 胡永林 蒋应军[1] LI Quanwei;FANG Jian;HU Yonglin;JIANG Yingjun(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064,China;Jinhua Traffic Engineering Quality Supervision Station,Jinhua 321000,Zhejiang,China;Jindong District Highway Management Section,Jinhua 321000,Zhejiang,China)

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]金华市交通工程质量监督站,浙江金华321000 [3]金东区公路管理段,浙江金华321000

出　　处：《路基工程》2018年第2期77-81,共5页Subgrade Engineering

基　　金：陕西省交通运输厅科技项目(13-02K)

摘　　要：以山西3种典型粉土为研究对象,通过重型击实试验,研究了击实次数、含水率、浸水条件及粉粒含量对粉土CBR的影响规律。结果表明:增大击实次数可有效增加粉土CBR,随含水率增长,粉土浸水CBR曲线呈抛物线的变化规律,而不浸水CBR曲线呈倒"S"的变化规律;随粉粒含量增大,最大浸水CBR值降低,浸水CBR受含水率的影响越大,水稳定性越差。The influence laws of compaction times,water content,water immersion conditions and powder content on the CBR strength characteristics of silt were studied by heavy compaction test with three typical silt types in Shanxi as the study object.The results show that the increase of the compaction times can effectively increase the CBR.With the increase of water content,the CBR curves of water immersion were parabola,and the CBR curves without water immersion were inverted“S”.As the content of the granules increased,the maxinmum immersion CBR value decreased.The greater the influence of water content of immersion CBR is,the worse the water stability is.

关 键 词：粉土 加州承载比(CBR) 击实次数 含水率 浸水条件 

分 类 号：U414.1[交通运输工程—道路与铁道工程]