中文摘要：

为深入了解坡积土中锚杆锚-土界面剪切变形特性随土体含水量和干密度的变化规律,本文采用自主研制的基于微元法锚-土界面摩阻性能测试方法和装置,引入均匀试验设计原理设计试验方案,测得不同含水量和干密度下锚-土界面的剪应力-剪切变形全过程曲线,其形状符合三折线模型。基于试验结果,回归得到了锚-土界面峰值抗剪强度随土体含水量和干密度变化的经验关系式。同时,试验结果表明：（1）锚-土界面峰值抗剪强度随土体含水量增加而降低,且土体干密度越大其降低幅度越大;（2）峰值抗剪强度随土体干密度的减小而降低,且土体含水量越小,其降低的幅度越大。

英文摘要：

This paper aims to better understand the shear deformation characteristic of anchorage body-soil interface with the changes of water content and dry density on colluvium soil. It uses an independently developed test method and devise that is based on infinitesimal method. It studies anchor-soil interface friction performance and designs an experiment plan with uniform design method. The result shows that the whole process of anchorage body-soil interface shear stress with shear deformation under different water contents and dry density values. The results’ shape conforms to Trilinear Model. An empirical formula is established by means of regression analysis method. It indicates the peak shear strength of anchorage body-soil interface with water content and dry density. Meanwhile, the results show that the peak of anchorage body-soil interface shear strength decreases with the increase of water content. The more the dry density is,the more it decreases. The peak of shear strength decreases with the decrease of dry density. The smaller the water content, the greater the reduction.