Test and Design Method for the Performance of Anchor Nodes between an Underreamed Anti-floating Anchor and the Bottom Structure

Abstract

Abstract The number of applications of underreamed anchors with high bearing capacities rapidly increases with the increase in building volume. Scholars and engineers worldwide have reported their researches on the bearing mechanisms and failure modes of underreamed anchors. However, the high capacity of anchors generates new problems for building structures, including the key design point of the anchor node between the high-capacity anchor and the structure in anti-floating engineering. Currently, there is no relevant research report or technical standard. To address this issue, a series of full-scale tests on steel anchor plates are conducted in Nanjing, China. Through these tests, a regular set of test results is obtained. Based on the obtained results, a calculation method for the bearing capacity of the anchor plate is derived, and a complete design method for the anchor node is presented. Furthermore, waterproofing and anti-corrosive construction methods for the anchor node are discussed to perfect the design work of the anchor node.