中文摘要：

文章基于Duncan-Chang模型，通过进行未含有和含有垂直节理的黄土三轴压缩试验，获得两者的应力一应变关系曲线。研究发现：同一围压下含有及未含有垂直节理的黄土应力一应变关系曲线均集中于较窄范围；经归一化处理所获得窄带内的平均曲线，可综合反映实际工程中黄土的物理力学性质；由平均曲线得到含有垂直节理的黄土应力一应变关系表达式及其参数；最终建立适用于潘涧河隧道Q，黄土的工程实用性模型，可为后续开展湿陷性黄土相关研究奠定基础。

英文摘要：

Based on the Duncan-Chang Model, the stress-strain relation curves of collapsible loess with or without vertical joints were obtained through triaxial compression tests. The results show that under the same confining pres- sure, the stress-strain curves of collapsible loess with or without vertical joints are concentrated in a narrow range; the average value curve in the narrow band obtained by normalized processing can comprehensively reflect the loess physical and mechanical properties in practical engineering; and the stress-strain relation expression for loess with vertical joints and its relative parameters are given by an average value curve. A practical engineering model suit- able for Q3 loess in the Panjianhe tunnel is established which lays a solid foundation for a follow-up study of collapsible loess.