Abstract
This paper presents the idea and provides an analysis of the rock breakout mechanism utilizing an undercut/breakout anchor. The new design is a modification of a standard undercut anchor, which is commonly found in applications involving steel-to-concrete anchorage. Of particular concern was the effect of the rock breakout strength on the anchor-pullout-induced failure of the rock mass. A numerical analysis was employed to model the effect of the changes to the shape and size of the breakout cones under varying rock strength conditions as a result of modifying the anchor design and loading pattern. The problem in question is pivotal for the potential evaluation of the effectiveness of the said anchor design under the non-standard conditions of its utilization.
Highlights
The undercutting anchors are primarily considered for use as fasteners in the steel elements of concrete structures [1,2,3]
Since the volume of the detachment medium depends on the crack propagation that forms and develops under the action of the anchor, the factors affecting the extent of the failure zone were determined
This study attempts to investigate whether the change in the strength parameters The doubts that arose were the reason for conducting the analyses in the field, as discussed of the base substrate material and the method of loading the undercut anchor affects the in this article, and initial the results one aspect of the research presented fractureoftrajectory and the dimensions of are the breakout rockbelow
Summary
The undercutting anchors are primarily considered for use as fasteners in the steel elements of concrete structures [1,2,3]. Since the volume of the detachment medium depends on the crack propagation that forms and develops under the action of the anchor, the factors affecting the extent of the failure zone were determined Among these elements, the most important were determined, as follows: the technological parameters of the process (anchor depth, spacing of anchors), the physical and mechanical parameters of rocks, and the geometric parameters of the anchor head. This study attempts to investigate whether the change in the strength parameters The doubts that arose were the reason for conducting the analyses in the field, as discussed of the base substrate material and the method of loading the undercut anchor affects the in this article, and initial the results one aspect of the research presented fractureoftrajectory and the dimensions of are the breakout rockbelow.
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