Field-test on bearing features of end-packaged expansion anchor

A field pull-out test was conducted to study the bearing features of end-packaged expansion anchors through varying the parameters of diameter,membrane length,embedment depth,solid density,and a series of corresponding load-displacement curves. The results show that the diameter of anchored solid and the solid density of anchor end were the most important factors affecting the bearing capacity of anchors,moreover. The relationship between the diameter of anchored solid and solid density shown a certain ratio growth. The relationship between membrane length and bearing features shown linear growth. The displacement of end-packaged expansion anchor was decided by its elasticplastic under limit end resistance state,when the end resistance expanded ultimate state decided by its tensile deformation. Comparing with traditional expansion anchors and common anchors,the extreme limit of anti-lifting bearing capacity of new end-packaged expansion anchors was effectively improved.