| With the increase of urbanization,the frequency of the deflection accidents has been increasing.Especially in recent years,the foundation pit excavation,stack,embankment load of inclined pile is increasing,this kind of pile is often associated with the level of the soil to the deformation,lateral displacement of pile soil.So far,the study of mechanism of inclined pile bearing is not thorough,especially to the lateral displacement of pile soil load-bearing mechanism of inclined pile is still in the blank stage,the engineering practice of lateral displacement of pile soil pile reinforcement use straight pile inclined pile reinforcement,the reinforcement method of design this obviously can not reasonably reflect the actual working inclined pile traits,lead to sloping pile reinforcement or conservative design,waste is serious;Or do not pay attention to,the remedy method is improper,buried the project hidden danger.Therefore,through to the inclined pile and pile on the bearing performance and the difference of load transfer law research,and provide technical support for the inclined pile reinforcement,reduce the waste caused by strengthening schemes conservative resources,due to the reinforcement measures to eliminate or not in place and stay safe hidden trouble,has very important practical significance.This article first studied by model experiment of pile under vertical load without soil lateral displacement and lateral displacement of pile soil three rate of inclined pile vertical bearing deformation behavior,and compared with the corresponding straight pile.Can be concluded that for silt soil conditions of pile,the pile body overall tilt when pile body tilt rate less than 2%,the same case,the vertical displacement of pile head and end of the inclined pile resistance than the basic unchanged;When the inclination ratio is greater than 4%,the vertical deflection and the end resistance ratio are no longer the determining factor for determining thebearing capacity,and the horizontal displacement is gradually becoming the key factor.Inclined pile under limit load pile tilt one side and a departure from the position of maximum bending moment of pile body and pile tilt rate has nothing to do,and with the increase of pile tilt rate,the absolute value of maximum bending moment of pile increases gradually.On the basis of model test and finite element analysis of pile is mainly studied soil lateral displacement of the lateral displacement of pile and soil size of the vertical scope of inclined pile bearing deformation behavior and load transfer mechanism of impact,and with the corresponding straight pile are compared.Can be concluded that for silt condition of soil and pile body whole sloping piles,pile with soil lateral displacement and vertical scope to the size of the increase gradually,vertical displacement and horizontal displacement of pile head increases gradually.The influence of the inclined pile soil pressure is independent of the pile inclination rate,and the soil pressure is more than the one side 5d and the pile deviation side of the pile is 5d.When the inclination ratio is less than 2%,the lateral friction of the pile is similar to the vertical pile.When the tilt rate is greater than 2%,the pile top is below 0 ~ 7d,and as the tilt rate increases,the average friction drag of the same position increases.In the range of 7d ~ 40 d under the pile,the average friction resistance of the same position is basically unchanged as the tilt rate increases. |
