Study On Method And Application Of Row Pile Supporting Structure For Deep Foundation Pit In Handan

In the first part of this paper, the current calculation theory in common use of deep foundation pit engineering are introduced,and the main calculation theory and FEM theories are studied, and the characteristic of each theory are analysised, especially introduced"m"method, from the basic differential equations, launches the method solution using the power series, get mathematical calculations."m"method used for to calculate pile to get to work a distortion, the endogenic force, The result may directly use in a pile design and the construction.FEM has become a practical and effective means in analyzing geotechniqe problems. The basic function and virtue, the interior module's characteristic and the gigantic material database and element database of ABAQUS are introduced in the paper. In this paper, I regard the engineering as a plane strain problem, study the internal force and distortion rule of supporting structure. The main research contains:(1)The choice of soil body model ,in this article the soil body uses the expansion the Druker-Prager model, soil body unit uses CPE8R,pile and anchor unit uses B22;(2)Setting up initial geostress field, Exerts the volume stress to the soil body, this action and the soil body initial stress just right balance, causes the soil body the initial displacement is zero;(3)Infliction of pre-stress of pole, The definition pre-stressed section attribute, to needs to exert the pre-stressed the part to exert the pre-stressed, and in step maintains the corresponding pre-stressed value at the following analysis;(4)Simulation of excavate foundation pit, use the order *model change in some analysis step to remove or to increase the unit, namely unit hard work concept.A supporting engineering in Handan is studied in this paper. Made a simulation analysis with ABAQUS. Study the internal force and distortion rule of supporting structure. The calculate results of"m"method and FEM are compared; Two methods obtain the result error is smaller. The finite element displacement result draws close to the actual result. The finite element method may apply to the deep hole excavated for building foundation supporting project, Instruction engineering design and construction.