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时间:2020-03-25
《盐渍土工程性质试验.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第29卷第12期2012年12月公路交通科技JournalofHighwayandTransportationResearchandDevelopmentV01.29No.12Dec.2012doi:10.3969/j.issn.1002—0268.2012.12.001盐渍土工程性质试验陈渊召,李振霞(华北水利水电学院土木与交通学院,河南郑州450011)摘要:为研究盐溃土的工程性质,首先通过试验测定了土样的颗粒分析结果和基本物理力学性能指标,得到了石灰物质化学性质和水泥的各项性能指标。然后分另q通过对不同含盐量、不同无机结合料掺量的盐渍土土样进行低温直剪试验、抗压强度试验、抗压回弹模
2、量试验系统研究了盐渍土的力学性能。最后分别通过对不同含盐量、不同无机结合料掺量的盐渍土土样进行干湿循环试验和冻融循环试验系统研究了盐渍土的耐久性能。研究结果表明:易溶盐含量的增加可显著降低盐溃土的抗剪强度;水泥和石灰的加入使盐渍土的粘聚力、内摩擦角、抗压强度和抗压回弹模量均显著提高,同时也使得盐溃土的耐久性有所改善;水泥对提高改良盐渍土的抵抗变形能力有显著作用,同时对早期强度与水稳性提高效果更好。关键词:道路工程;工程性质;试验研究;盐渍土;耐久性;力学性能中图分类号:U416.1+66文献标识码:A文章编号:1002—0268(2012)12—0001—06ExperimentofEn
3、gineeringPropertyofSalineSoilCHENYuanzhao,LIZhenxia(SchoolofCivilEngineeringandCommunication,NorthChinaUniversityofWaterResourcesandElectricPower,ZhengzhouHenan450011,China)Abstract:Inordertoresearchtheengineeringpropertyofsalinesoil,first,throughtesttheparticleanalysisresultandtheindexesofphysic
4、alandmechanicalpropertiesofthesoilsamples,thephysicochemicalpopertyoflimeandtheindexesofcementwereobtained.Then,themechanicalpropertyofthesalinesoilwassystematicallystudiedthroughdirectsheartestatlowtemperature,compressivestrengthtestandcompressionresiliencemodulastestforthesalinesoilwithdifferen
5、tsaltcontentsanddifferentmixingamountsofinorganicbinderrespectively.Finally,thedurabilityofthesalinesoilwassystematicallystudied,throughalternationtestofwettinganddryingandfreeze—thawcycletestonthesamplesofthesalinesoilwithdifferentsaltcontentsanddifferentmixingamountsofinorganicbinderrespectivel
6、y.Theresultsshowthat(1)theshearstrengthofsalinesoilcanbedecreasedsignificantlywithincreasingofdissolvingsaltcontent;(2)withadditionofcementandlime,cohesion,internalfrictionangle,compressivestrengthandcompressionresiliencemodulusofsalinesoilcanbeincreasedsignificantty,andthedurabilityofsalinesoilC
7、anbeimproved;(3)cementhasremarkableeffectOnimprovingthedeformationresistanceofmodifiedsalinesoil,andhasbettereffectonincreasingitsearlystrengthandwaterstability.Keywords:madengineering;engineeringproperty;experimentals
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