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为了分析路基土动弹性模量和静弹性模量的相关性,针对3种不同塑性指数的季冻区路基土,在最佳含水量状态下制成压实度大于95%的试件,在不同围压条件下进行了静、动三轴试验,得出了经历不同冻融循环次数的路基土静、动弹性模量,分析了围压、冻融循环次数对静、动弹性模量的影响规律;基于统计方法,建立了采用静弹性模量推导其动弹性模量的数学表达式。结果表明:随着围压和塑性指数的增大,试件的静、动弹性模量逐渐增大,随着冻融循环次数的增加,其静、动弹性模量逐渐下降最后基本趋于稳定;季冻区路基土静弹性模量与动弹性模量之间具有良好的相关性。研究结果说明了季冻区路基土的静、动弹性模量并没有本质区别,只是在不同加载条件下的力学性质表现。
In order to analyze the correlation between elastic modulus and elastic modulus of subgrade soils, three subgrade soils with seasonal plasticity index of different plasticity index were made under the optimal water content with the compaction degree greater than 95% Under static and dynamic triaxial tests with different confining pressure, the static and dynamic elastic modulus of subgrade soil subjected to different freezing and thawing cycles were obtained. The effects of confining pressure, freezing and thawing cycles on static and dynamic elastic modulus Based on the statistical method, a mathematical expression was deduced to derive its dynamic elastic modulus using the static elastic modulus. The results show that with the increase of confining pressure and plasticity index, the static and dynamic elastic modulus of the specimens gradually increase. With the increase of the number of freeze-thaw cycles, the static and dynamic elastic modulus gradually decrease and finally stabilize There was a good correlation between static elastic modulus and dynamic elastic modulus of subgrade soil in quarried area. The results show that the static and dynamic elastic modulus of subgrade soil in seasonal frozen area are not different from each other, but only under different loading conditions.