INFLUENCE OF WATER CONTENT AND DRY DENSITY ON PERFOR-MANCE OF ANCHORAGE BODY-SOIL INTERFACE WITH UNIFORM EXPERIMENTAL DESIGN

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.