Field test on the ultimate load of anti-floating anchor and the prediction of its pull-out bearing capacity
Based on the field pull-out test on the ultimate bearing capacity of anti-floating an-chor of a project in Qingdao,the load-displacement law of anti-floating anchor was analyzed,and the failure form and mechanism of anti-floating anchor of"one anchor and multi-reinforcement"type were defined.At the same time,cubic polynomial function was used to predict the uplift bearing capacity of anti-floating anchor under ultimate uplift displacement.The research showed that the load-displacement curve of anchor presents a"slow change-steep rise"pattern,the interfacial bond strength between anchor and rock was small,and the anti-floating anchor mainly produced pull-out failure of anchor solids.There were large deviations from the predicted values of the standard formulas.Through regression analysis of cubic polynomial function,the error of anchor displacement was controlled within 10%,and when the anchor position displacement was less than 20 mm,the forecast accuracy could reach 97.4%.The research results have a certain reference value for the design and engineer-ing application of the anti-floating anchor in this formation.
anti-floating anchorfield pull-out testload-displacement modelprediction of bearing capacity
NETL
NSTL
万方数据
维普
