Research On Numerical Simulation And Experimentation Of Vertical Bearing Capacity Of Pre-stressed Concrete Tube Pile

PC pile has some merits:high bearing capacity of single pile,good anti-bend capability,stabile quality,wide application,fast pile drivingpace,so it is adopted in more and more industrial and civilian projects.Because pre-stressed concrete tube pile is a system which the pile and concrete work together,so its working performance is affected by many factors and its destroyed model complicated.Therefore the study of pile's bearing capacity is significant and arduous task and work.The PC pile's characteristic,applicable geological condition and the current calculation of bearing capacity have been analysed in the text.Base on contents mentioned above,using FLAC^3Dnumerical value simulating,combining the load transfer mechanism of the pile and regarding a large number of data which acquired from static-pressure experimentation as the foundation of the numerical simulation, we make numerical value simulating toward Zhang Zhou city "beautiful one party" the first stage of "garden foreign-style house" pile top vertical bearing test of live and "changfang.eastcounty"project in ChangSha city.On the one hand,the systemic summarization of PC pile's vertical carrying capacity and method has been mentioned and expatiate the theoretics and application of FLAC^3Dof numerical value simulating method,on the other hand,we realized static-pressure experimentation including the experimentation's development of theory and practice and the equipment.Depend on these we make the analysis of contrasted between result of static-pressure experimentation and numerical value simulating.The result that the numerical simulation and measured settlement consistent basically.But the value calculated by the expressions of the criterion(JGJ94—94)is far away with that the numerical simulation result.Finally we consult the correct coefficient of vertical bearing capacity which is put forward by Zhang Mao Zhu who is studing the PCpile in ground work with soft soil.When we modify the value calculated by the expressions of the criterion(JGJ94—94)with the correct coefficient, the result is consistent basically with the test value.