Study On Horizontal Bearing Capacity And Negative Skin Friction Of Port Engineering Piles

The further research in port engineering pile foundation is considered to be important of such as behavior and bearing capacity of laterally loaded single piles and pile groups, and the functional mode of wharf foundation pile under flood tide torrent, and load-deflection curve, and negative skin friction along the pile, et al .The bearing capacity and the negative skin friction of port engineering piles are analyzed, to satisfy port engineering development demand better.Combined with the experiment data, a series of studies have been performed on the behavior and failure mechanism of laterally loaded single piles and pile groups. Through the analysis and research of model piles test data in medium-fine sand, the value of the exponent n in medium-fine sand usually indicates 0.5-0.9 . An efficiency formula for non-uniformity of load distribution the longitudinal direction of pile groups and a total lateral bearing capacity formula of n piles are set up. The revising formula on p-y curves of the back pile subjected to the front pile in sand and the calculation method of laterally loaded single pile and pile groups are put forward. These formulas, which have practical value in piles calculation, are enough to meet piles calculation requirement.Artificial nerve network forecasted YSO in clay p-y curves is researched and 8 physical parameters are studied by using the principal component analysis methodWhen the fracture load was not reached for a trial pile under lateral load, the ultimate load of the pile might be predicted to the field-surveyed load settlement data of existing trial pile and by H-S curve extension method and hyperbola method.The dynamic characteristics of wharf piles subjected to lateral load is analyzed, used the dynamics theory. It gives an analysis and research to the functional mode of wharf foundation pile under flood tide torrent. The method of analyzing and calculating the internal force of wharf foundation pile and vibration analysis method for wharf foundation pile under flood tide torrent are advanced.The test of negative skin friction along the single pile or wharf bent piles, which is modeled after piles of ZanJiang harbor , is studied. The mechanism and some new work laws of negative skin friction along the single pile or wharf bent piles is analyzed. The engineering construction measure decreased the negative skin friction is presented. An improved empirical formula has been put forward for the calculation of the negative skin friction.