人民黄河
人民黃河
인민황하
Yellow River
2014年
9期
127-129
,共3页
共振柱试验%膨胀土%动剪切模量%围压%干密度
共振柱試驗%膨脹土%動剪切模量%圍壓%榦密度
공진주시험%팽창토%동전절모량%위압%간밀도
resonant column test%expansive soils%dynamic shear modulus%confining pressure%dry density
通过对南水北调中线禹州段膨胀土的共振柱试验，探讨了围压及干密度对膨胀土动剪切模量及阻尼比的影响。结果表明：动剪切模量随剪应变的增大而减小，阻尼比随剪应变的增大而增大；动剪切模量比随动剪应变的变化几乎不受围压及干密度的影响；然而，围压及干密度对最大动剪切模量均有显著影响，且呈线性变化，并给出了拟合关系式。
通過對南水北調中線禹州段膨脹土的共振柱試驗，探討瞭圍壓及榦密度對膨脹土動剪切模量及阻尼比的影響。結果錶明：動剪切模量隨剪應變的增大而減小，阻尼比隨剪應變的增大而增大；動剪切模量比隨動剪應變的變化幾乎不受圍壓及榦密度的影響；然而，圍壓及榦密度對最大動剪切模量均有顯著影響，且呈線性變化，併給齣瞭擬閤關繫式。
통과대남수북조중선우주단팽창토적공진주시험，탐토료위압급간밀도대팽창토동전절모량급조니비적영향。결과표명：동전절모량수전응변적증대이감소，조니비수전응변적증대이증대；동전절모량비수동전응변적변화궤호불수위압급간밀도적영향；연이，위압급간밀도대최대동전절모량균유현저영향，차정선성변화，병급출료의합관계식。
Through the resonant column test on the expansive soils of South-to-North Water Diversion Project at Yuzhou,the influence of confining pressure and dry density of soils on dynamic shear modulus and damping ratio of the expansive soils was explored in detail. The results show that the dynamic shear modulus decrease with the dynamic shear strain,while the damping ratio increase with it. The relationship between dynamic shear modulus ratio and the dynamic shear strain is nearly independent on the confining pressure and dry density. However the maximum dynamic shear modulus change linearly with the confining pressure and dry density notably,and the fitting formula are suggested.
