The Impact Analyses Of Soil About The Squeezed Branches In The Squezzing Process

The squeezed pile is based on common concrete filling pile, from bionic principle, in order to use the resistance force of the soils, we set many branches along the pile hole, depend on increasing the resistance force and advance the bearing capacity of the squeezed pile, or increasing the bearing surface area and advance the bearing capacity. The paper focuses on the stress analyses of the arms during the squeezing. And analyze the plastic zone during the single and double process under every angle with cylindrical expansion method, and the stress diversification under different angles using the software ANSYS. Due to the non-linear of soil under stress-strain relation, supposing the arms which are obedience to secondary curve, through this suppose, we establish mechanical model of the arms during the squeezing process, along statical analysis, getting the relation of the soil and arms. Through the anslyses using ANSYS, we get: the stress of soil decayed exponential with the increase of the angles, After the analysis of the single and double process using the cylindrical expanding theory, we get: when the arms squeeze outward, the plastic zone expands, both to double mode, the squeezing effect of horizontal direction, and to single mode, the squeezing effect of bottom are well ,the density increase. It is good to the carrying capacity of the pile. Nowadays FLAC is one of the famous rock analysis software in the world, with the test data, we establish numerical models of the squeezing process, simulate the change of displacement and stress about the soil. The stress and displacement present symmetric distribution along the horizontal direction of the arms during the double process. In the horizontal direction, domain of influence about the soil is about 1.5m~2.0m. At the same time, in the vertical direction, the soil is affected greatly in the range of 0.6m from the arms. The stress and displacement no longer present symmetric distribution along the horizontal direction of the arms during the single process. In the horizontal direction, domain of influence about the soil is about 1.5m~2.0m, to. In the vertical direction, the squeezing effect of the up arms is superior to the bottom arms...