Analysis Of Pile Side Frictional Resistance And Settlementon On Loess Ground Of Zhengzhou To Xian Passenger Dedicated Railway Line

The high speed running of train needs smooth and stable foundation of track undersurface.It means that a high quality of stability for the settlement is needed for high-speed railway.Pile foundations are widely used in civil engineering,and building become higher and higher,their foundation support bigger and bigger structural loads,so settlement evaluation come to be an important step in design of these kind of engineering.there are several problems on the mechanics of vertical beaning capacity for a single pile.But settlement behavior of pile foundation under axial load is the results of pile-raft-soil interaction,settlement evaluation is always a problem in design of pile doundation because of the complexity of piles.At presents,many settlement evaluation methods of pile foundation have been put forward by engineers and researchers,but these methods have their own characteristics and epplicability.There are several main works of the ultimate settlement.Firstly,thethesis presents the development of calculatingsettlement of pile groupfoundation at present. Secondly,ultimate settlement of pile group foundation is calculated with the GLGPCS software package foundation. The result is compared with current as well.Thirdly,the working rules of the ultimate settlement,the axial pressure,side friction and tip resistance of the pile,load ratio by cap and pile,load ratio by cap and pier-subsoil average stress of soil,load-level,spacing and length of piles,compressibility modulus of soil are analyzed and summarized.With the listed above analysis the main characteristics of settlement behavior and the main factors of group-pile foundation displacement can be fully understood. for the design and construction of high-speed railway and references to the similarity.It is definite value in practice.