Anchor effects

pullout strength and corresponding main influential factors are studied under different geological conditions. Based on anchor bearing arch theory

a calculation method of system anchors bearing capacity is proposed and applied to analyzing the bearing capacity of different support types under different geological environments. Cost-effectiveness ratio is also compared. Result from the analysis is that: system anchors play an important effect in the surrounding rock mass; and the cost-effectiveness ratio decreases greatly as the geological condition deteriorates. Combined with several engineerings design and construction

conclusions can be drawn that few and long grouted anchors should be used instead of frequent system anchors in soft rock mass for better stabilizing the early supports.