Study On Defects Of Bearing Capacity Of Single Pile And Reinforcement

Pile foundation have been obtained using the maximum range, as an importantfoundation for bridges and other structures. But defects still avoid difficult even in theexisting technical conditions，because of its special construction. Therefore, before theconstruction of the defect, flaw detection, prevention technique of pile for reinforcementbecomes an important process of the pile foundation construction of pile foundation.It is ofgreat significance to ensure the bearing capacity of pile foundation is good and the stability ofthe upper structure.This paper first introduces the pile foundation defect detection and related basic theoryknowledge, include defect classification, detection means, defect judgment basis and so on.And using ANSYS finite element software to establish the numerical analysis model ondefective piles and pile foundation reinforcement respectively. Simulation calculation of piledefects includes different defect location and defect forms.Using the changes of reinforcementchange and grouting quantity position of grouting reinforcement as the main line to thesimulation of reinforcement.,Study stress and strain results on defects and reinforcement ofpile.Through the calculation of the analysis, the conclusion is as follows:1、To the end bearing pile, the lower defects are the most unfavorable position of defectin three kinds of defects. But the upper part of the pile compressive strain will be greaterwhen the defect form for the sector.2、ring defect have The biggest effect on the bearing capacity of piles，In the three partsof pile foundation。 The pile compressive strain of the upper part will be greater.3、During grouting reinforcement of the Friction pile, the reinforcement effectWill mostobvious when Reinforcement on the part of defect location and above when The groutingvolume does not change. The larger the grouting pile stress strain value is small,but theirchanges are not linearly proportional。4、Grouting pile foundation Central and lower，The upper part of the soil to the pilefoundation pile bearing capacity influence...