路基工程
路基工程
로기공정
SUBGRADE ENGINEERING
2012年
1期
4-6,10
,共4页
加筋盐渍土%加筋形状%麦秸秆%三轴压缩试验%应力路径
加觔鹽漬土%加觔形狀%麥秸稈%三軸壓縮試驗%應力路徑
가근염지토%가근형상%맥갈간%삼축압축시험%응력로경
reinforced saline soil%shape of reinforced material%wheat straw%triaxial compression test%stress paths
以等围压和减围压应力路径三轴压缩试验,研究不同加筋形状麦秸秆的加筋盐渍土的抗变形性能。研究结果表明：1/4圆弧状麦秸秆的加筋土的强度最大、抗变形能力最强,在相同围压下,1/4圆弧状的麦秸秆加筋土的强度增长速度较快。在低围压时,麦秸秆加筋土的偏应力应变曲线呈硬化型,在高围压时,曲线呈软化型。圆管状加筋土破坏形式主要为局部破坏,1/4圆弧状加筋土为整体破坏,1/2圆弧状加筋土破坏形式介于圆管状和1/4圆弧状之间。1/4圆弧状的麦秸秆加筋土的抗变形能力最优。
以等圍壓和減圍壓應力路徑三軸壓縮試驗,研究不同加觔形狀麥秸稈的加觔鹽漬土的抗變形性能。研究結果錶明：1/4圓弧狀麥秸稈的加觔土的彊度最大、抗變形能力最彊,在相同圍壓下,1/4圓弧狀的麥秸稈加觔土的彊度增長速度較快。在低圍壓時,麥秸稈加觔土的偏應力應變麯線呈硬化型,在高圍壓時,麯線呈軟化型。圓管狀加觔土破壞形式主要為跼部破壞,1/4圓弧狀加觔土為整體破壞,1/2圓弧狀加觔土破壞形式介于圓管狀和1/4圓弧狀之間。1/4圓弧狀的麥秸稈加觔土的抗變形能力最優。
이등위압화감위압응력로경삼축압축시험,연구불동가근형상맥갈간적가근염지토적항변형성능。연구결과표명：1/4원호상맥갈간적가근토적강도최대、항변형능력최강,재상동위압하,1/4원호상적맥갈간가근토적강도증장속도교쾌。재저위압시,맥갈간가근토적편응력응변곡선정경화형,재고위압시,곡선정연화형。원관상가근토파배형식주요위국부파배,1/4원호상가근토위정체파배,1/2원호상가근토파배형식개우원관상화1/4원호상지간。1/4원호상적맥갈간가근토적항변형능력최우。
The anti-deformation performance of reinforced saline soil with different shapes of wheat straw was studied by means of conventional and reduced triaxial compression tests.The analyzing result shows that the reinforced saline soil with wheat straw of quarter-circular arc shape has the largest strength and the best anti-deformation performance;under the same confining pressure,its strength increases fast.The deviatoric stress-strains curves presents strain-harden in case of low confining pressure and strain-soften in case of high confining pressure.Reinforced soil with circular tube mainly showed partial destruction,that with quarter-circular is overall damaged,and that with semicircular arc is damaged to the extent between circular tube and quarter-circular arc,in which that with quarter-circular has the best anti-deformation performance.
