Computation method for predicting ultimate bearing capacity of anchor rod based on mathematical model

Abstract

The invention relates to the technical field of a method for detecting the bearing capacity of an anchor rod in the anchoring process, in particular to a computation method for predicting the ultimate bearing capacity of the anchor rod based on a mathematical model. The computation method includes the following steps that firstly, an anchoring interface shearing sliding model is built; secondly, the ultimate anti-drawing loads of the anchor rod are determined; thirdly, the affecting factor psi of the anchoring length for the adhesion strength is determined, the affecting factor K1 of the crack gap of a rock body for the adhesion strength is determined, and the affecting factor K2 of the crack opening degree of the rock body and filler for the adhesion strength is determined; fourthly, the mathematical model for predicting the ultimate bearing capacity of the anchor rod is determined. Through analysis and research on the affecting factors for the bearing force of the anchor rod in the actual engineering, the computation formula for the bearing force of the anchor rod is corrected, and a computation model for the bearing capacity of the anchor rod under comprehensive conditions is obtained. The ultimate bearing capacity of the anchor rod can be accurately predicted, accuracy and stability are high, and the computation method can be widely applied to the actual engineering.

Description

technical field [0001] The invention relates to the technical field of a method for detecting the bearing capacity of an anchor during anchorage, and in particular to a calculation method for predicting the ultimate bearing capacity of an anchor based on a mathematical model. Background technique [0002] Bolt anchoring technology has the advantages of low cost, simple processing, convenient installation, and fast construction speed. It is playing an increasingly important role in geotechnical engineering, but the accurate determination of its ultimate bearing capacity has always been a major problem. The actual pull-out resistance of anchor bolts in my country is mostly obtained through on-site pull-out experiments, and pull-out experiments are often destructive, and the number of pull-outs is also limited. It is necessary to find a reasonable model to calculate and predict its ultimate resistance. pull force. Many scholars have proposed the calculation theory of bolt beari...

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a calculation method for predicting the ultimate bearing capacity of the anchor based on a mathematical model in order to solve the problem that the prediction results of the ultimate bearing capacity of the anchor often have a certain deviation from the engineering practice

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