二灰改良黄土强度特性的试验研究

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1、密级公开分类号TU411工程硕士学位论文二灰改良黄土强度特性的试验研究刘鹏指导教师赵敏教授甄平福高级工程师申请学位级别工程硕士工程领域建筑与土木工程2018年5月11日增大，粘聚力c和内摩擦角φ会随之减小，当石灰含量增大时，它的粘聚力c变大，内摩擦角φ增大幅度较小。关键词：石灰；粉煤灰；改良黄土；应力应变；中主应力；consolidationstressincreasethestrengthofsoilincreases.(3)Alongwiththeincreaseofthemainstressdiffer

2、enceofsoil,thestrongerthestrengthoflimeflyashtoimprovetheloess.Thecurvesoftwoashloesshighlimecontentisgraduallyhardeningtosoftening,limeflyashImprovedLoessstress-straincurve,peakstrainvalueofabout3%nearthepeakintensitydecreasedaftersofteningcurve,sothelimec

3、ontentshouldnotbetoohigh,pronetobrittlefailure.Theoptimallimecontentis10%-15%.(4)Theshearstrengthparametersoflimeflyashimprovedloesswillchangewiththechangeofinitialconditions.Theresultsshowthatwiththeincreaseofwatercontentωinsoil,cohesioncandinternalfrictio

4、nangleφwilldecrease.Whenthelimecontentinsoilsampleincreases,itscohesioncwillincreaseandinternalfrictionangleφwillslightlyincrease.Keywords:Lime;flyash;improvedloess;stressstrain.;intermediateprincipalstress目录1绪论..............................................

5、............................................................................................11.1研究背景..............................................................................................................................11.2二灰改良土研究现状..................

6、........................................................................................21.2.1二灰改良土国外研究现状............................................................................................21.2.2二灰改良土国内研究现状...........................................

7、.................................................21.3平面应变国内外研究现状..................................................................................................31.3.1平面应变国外研究现状...............................................................................

8、................31.3.2平面应变国内研究现状...............................................................................................41.4二灰改良黄土强度形成机理..........................................................