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CFG pile composite foundation is a relatively new ground treatment technology , engineering applications extensive, but not sufficient theoretical research . Binding characteristics of CFG pile in this topic , the focus on the bearing capacity of CFG pile in theory , settlement, hole stability problems , and be verified with engineering examples , were analyzed by numerical simulation . Innovation made ??based on the particularity of CFG pile composite foundation Shen surface CFG pile composite foundation \impact related research ; combined with the new model , a comprehensive study of the theory of the neutral point cushion thickness determine the neutral point at the pile axial stress , double shear failure model upper and lower part of the bearing capacity theory , as well as the Capacity Calculation method with examples to verify the reliability and correctness of the model . Overview of common settlement calculation method - using an analytical method, numerical method and empirical formula empirical formula of CFG pile composite foundation settlement calculation , carried out a comparative analysis of several commonly used methods . CFG pile composite foundation settlement deformation mode , derive a kind of the pile - soil - cushion interactions settlement calculation methods, and pile soil stress ratio formula . Indoor triaxial test , given access saturated soil pore pressure coefficient calculation method , and then take advantage of the characteristics of capillarity , obtained theoretically calculated pore pressure coefficient formula ; CFG pile dry hole stability calculation maximum drilling depth of the stem into the hole , then the hole wall stability slurry Wall , the last derived previously saturated soil pore pressure coefficient calculation method , stability analysis of CFG pile drilling timeliness . Drucker-Prager elastoplastic model , ANSYS, combined with the characteristics of CFG pile modeling, based on the finite element method calculation of CFG pile composite foundation settlement , bearing capacity problem , theoretical research . Shen car factory office building combined with complicated geological conditions of the new plant site , the office building was built on a natural foundation bearing capacity is insufficient , and need to be processed , and initially proposed seven kinds of programs , than through the economy , technology and other aspects of the election , it is recommended to adopt program : pile end placed the ④ layer of coarse sand on the CFG pile composite foundation and independent foundation .
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