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1、JournalofEngineeringGeology工程地質(zhì)學(xué)報1004—9665／2009／17(4)-0545-05麥秸稈的力學(xué)性能及加筋濱海鹽漬土的抗壓強(qiáng)度研究李敏①柴壽喜②魏麗②(①西部災(zāi)害與環(huán)境力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室(蘭州大學(xué))蘭州730000)(②天津城市建設(shè)學(xué)院天津市軟土特性與工程環(huán)境重點(diǎn)實(shí)驗(yàn)室天津300384)摘要為開展天然草本纖維材料防腐前后的力學(xué)性能及加筋濱海鹽漬土的抗壓強(qiáng)度增長規(guī)律研究，本文探討了麥秸稈的微結(jié)構(gòu)特征及防腐方法、測試并對比了防腐前后的麥秸稈的質(zhì)量增加率、吸水率、極限拉力和極限
2、延伸率，證實(shí)用sH膠浸泡麥秸稈不僅能起到防腐作用，還可提高麥秸稈的力學(xué)性能。完成了不同加筋長度、不同加筋率及浸膠后呈不同狀態(tài)麥秸稈的加筋濱海鹽漬土無側(cè)限抗壓強(qiáng)度試驗(yàn)，結(jié)果證實(shí)：摻加長10ram麥秸稈優(yōu)于摻加長20mill麥秸稈；適宜加筋率為0．3％一0．4％；摻加浸泡sH膠后呈潮濕狀態(tài)的麥秸稈優(yōu)于摻加浸泡sH膠后呈干燥狀態(tài)的；麥秸稈加筋鹽漬土的抗壓強(qiáng)度高于素鹽漬土。初步的研究結(jié)果表明，麥秸稈適宜作加筋材料使用。關(guān)鍵詞加筋土麥秸稈無側(cè)限抗壓強(qiáng)度濱海鹽漬土加筋材料SH固土劑地基處理中圖分類號：P642文獻(xiàn)標(biāo)識碼：A
3、MCHANICALPRoPERTmSoFⅥ佃【EATSTRAWANDSTRENGTHoFITSREDoRCEDSHoRESALDESoILUMin①CHAIShouxi②WEIh②(①研／aborawryofMedum／~OnD／sasterandE,~nment／nWesternOr／ha(Zo／ighouUn／wgv)，M~m／stryofEducat／on-／．a(chǎn)nzhou7300O0)(②／'tanj／n研LaboratoryofSo／Otaraaer／a／csandEng／neer／ngEnv／ron
4、ment。Tianj／n疵眥ofUrbanConstnta~n，Tianj／n30~884)AbstractThispaperpresentsthemechanicalperformanceofherbagefibermaterialsbeforeandafteranticorrosionandthestrengthcharacteristicsofwheatstrawreinforcedinshoresalinesoil．Itdiscussesthemicrostructurecharac—teristics
5、andtheanti—corrosivemethodofthewheatstraw．ThewheatstrawistestedandcomparedtheincreasingrateofweightIthewaterabsorptionIthetensileforceandelongationofthewheatstrawsbeforeandafteranticorro—siontreatment．rhetestresultsshowthatthesoakingwheatstrawintoSHagentcann
6、otonlyprotectitfromCOITOS—ivenessIbutalsoimproveitsmechanicalproperties．111eresultsofunconfinedcompressivestrengthtestofdiferentlengthsandaddingratiosofwheatstraw-andconditionsaftersoakingagentshowthattheunconfinedcompressivestrengthofreinforcedsoilwithlOmml
7、ongwheatstrawishigherthanthatofthe20mmlongwheatstraw．Thesuit—ableaddingratioisabout0．3％一0．4％inweight．rI1lemixturewithwheatstrawinwetconditionaftersoakingSHagentisbetterthanthatindrycondition．111estrengthofreinforcedsalinesoilininshorewithwheatstrawishigherth
8、antheoriginalsalinesoil．Preliminaryresultsshowthatwheatstrawissuitableforusingasthereinforcement．KeywordsReinforcedsoil，Wheatstraw，Unconfinedcompressivestrength。Salinesoil，Inshore-Reinforcementm
