路基填土抗拉强度测定的实验研究

Experimental Studies on Determination of Tensile Strength of Road Foundation Soils

利用双剪应力原理对拉压性能不同材料圆环的极限压力进行了分析 ,并开发一套实验装置 ,对不同压实度下重塑黄土的抗拉强度进行了测试。建立了土体抗拉强度和干密度之间的关系。结果表明 ,实验数据稳定可靠 ,散布小 。

The elasto plastic stress analysis for ring with different strength in tension and compression are conducted using generalized twin shear stress strength theory. With the analysis results, a test set up for measuring tensile strength of compacted loess with different compacted factors is proposed. A relationship between tensile strength and dry unit weight of soils is established. The test results are reproducible and reliable.