The Pile Foundation In Negative Friction

Pile foundation is one of the oldest foundation forms, and develop very rapidly in modernize era. Along with the piles technology' s development and construct skill bring forth the fresh, pile has became the broadest foundation forms in project item. The negative friction in pile' s designing and constructing is acquainted with for engineer. Due to the important infection in using foundation, the negative friction in pile has became one of the engineering skill focus.Many survey data refer to mortal down load and sedimentation be produced due to the negative friction in pile foundation. The inequable sedimentation endanger the pile foundation greatly. In engineering practice, negative friction must be considered to ensure the foundation stability. The measure to avoid the negative friction must be carry out in construction phase and to prevent the negative friction in using.This thesis put forward a systemic method to settle the negative friction in project design. It includes when the negative friction must be consider, the zero position decided, count the down load, the negative friction group pile, the infection on end-bearing and sedimentation and stability , how to deal with in design to avoid the negative friction and how to solve when the negative friction produced. In this thesis the author figure out a engineering project by the method and prove the method feasibility.In this thesis consider the negative friction' s infection on the parameters of vertical weight and sedimentation by MATLAB and ANSYS, and compare the conclusion with the design without the negative friction. In this thesis summarize how to avoid and deal with the negative friction in designing and using.Researches indicate:(1) The negative friction in pile will lead to large number of down load in some designs. This friction must be considered in designto avoid the sedimentation and destroy in the building.(2) In project designing the negative friction must be calculate by the method in this thesis. Parameters of vertical weight and sedimentation must be checked to ensure the design security.(3) The negative friction must be avoid on construction . When the friction has been founded, people must deal with by the method in this thesis.