石灰土强度与最优施工含水率关系研究

Study on Relationship between Optimum Construction Water Content and Strength of Lime Tread Soils

为了研究石灰改良膨胀土得最优施工含水率与石灰土相关强度的关系,文中以某边坡膨胀土为研究对象,进行了直剪试验、CBR及无侧限抗压强度等相关强度的试验研究,研究了最优施工含水率、掺灰率与膨胀土强度的关系,试验结果表明石灰土的直剪、CBR值及无侧限抗压强度曲线与施工含水率的关系曲线类似于击实曲线,且最优施工含水率随着掺灰率的增大而线性增大,强度与掺灰率的关系曲线与击实曲线类似,存在最优掺灰率,这些结果的得出对现行石灰土路基施工控制参数的确定方法改进具有一定的指导作用。

In order to study the relationship between optimum construction water content and strength of lime tread soils, the authors took the expansive slope soils as study subjects and did the test on shear strength, CBR and unconfined compressive strength, and studied the relationships between construction water content, lime contents and expansive soil strength. Result indicated that the relationship between construction water content, shear strength, CBR and unconfined compressive strength was similar one to the compaction curve, with the increase of lime content the optimal construction water content ratio increased linearly, the relationship between strength and lime content had similar one to the compaction curve too and there was an optimal ratio of lime contents. The results of this paper have some guiding role to the ways of determining the construction control parameter of lime-treaded expansive soils.