干密度和含水率对稻草加筋土强度与变形的影响  

Effect of dry density and water content on the strength and deformation of saline soil reinforced with rice straw

作　　者：柴寿喜[1] 石茜[1] 

机构地区：[1]天津城市建设学院地质与测绘学院,天津300384

出　　处：《煤田地质与勘探》2013年第1期46-49,共4页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41140024;41272335);天津市自然科学基金项目(12JCYBJC14500);天津市高等学校科技发展基金项目(20090901)

摘　　要：以防腐处理后的稻草加筋滨海盐渍土,完成了三种干密度和三种含水率的稻草加筋土的抗压实验和三轴UU压缩实验。结果表明:干密度较大时,加筋土的抗压强度和抗剪强度较高,达到峰值强度的应变较大,即抗变形能力较强;随含水率的增加,加筋土的强度降低,抗变形能力减弱;加筋稻草增强了土的抗变形能力,提高了土的粘聚力,但对内摩擦角的影响很小;在最优含水率和最大干密度下,加筋效果最优。Saline soil is reinforced with anti-corrosive rice straw marinated in SH agent,and the unconfined compressive test and triaxial shear test（UU） on reinforcement are carried out immediately in the condition of three dry densities and three water content of saline soil.It has been proved that（1） compressive strength and shear strength are high,and anti-deformation is remarkable in great density,（2） the strength are high and anti-deforma-tion of reinforced soil reduces with the increase of water content,（3） reinforcement with rice straw increases the cohesion and anti-deformation,but has small impact on internal friction angle,（4） reinforcing effect is very well in the condition of maximum dry density and optimum water content.Research results can be used as a guide for engineering construction.

关 键 词：纤维加筋土 滨海盐渍土 干密度 含水率 

分 类 号：TU448[建筑科学—岩土工程]