Experimental research on bearing capacity of special anchor

Abstract

The bearing capacity of anchor can be greatly improved by adding anchor gills on the basis of traditional anchor. Taking the smaller particle pea stone concrete as anchoring cartridge, this paper conducted the bearing capacity pull-out test on special anchor with additional anchor gills and studied the relationship between bearing capacity of special anchor and layers of anchor gills, strength of pea stone concrete, the size of the block. The test results have revealed that adding anchor gills in anchoring section has an obvious effect on improving the bearing capacity of anchor and the bearing capacity of single-layer rod is 1.2 times - 1.7 times that of finishing rod. There is a non-linear relationship between the bearing capacity of special anchor and the strength of pea stone concrete when the strength of anchor gill is constant. However, as the concrete strength increases, the improvement of bearing capacity becomes smaller. Under the condition of single-layer rod, the bearing capacity of anchor increases with the increase of the size of the block, which shows that the bearing capacity of anchor is positively correlated with the thickness of concrete when the strength of anchor is constant.