Mechanical Properties Of Pile Anchor Pile Retaining Structure Angle

In this thesis, Behavior of deep foundation corner pile is performed by ANSYS three-dimensional finite element numerical simulation Pile-anchor structure in deep excavation is a common envelope forms. Planar shape of the foundation for the concave polygon, Yang corner piles (pile angle referred to in this article) bear the complexity of the role of earth pressure, the occurrence of two-way curved design was prone to security incidents. At present, the work mechanism of corner piles study is not yet widespread, that is still in accordance with the ordinary pile calculation theory, so the project has security works.Combination with practical engineering examples for corner pile of internal force monitoring data, it use the finite element numerical simulation technique to study the performance of its work, compared to the classical method of calculating the results of soil mechanics in the process of excavation, to study the work of corner pile in the two-way bending and the characteristics of force in accordance with its proposal a reasonable angle of pile reinforcement for the corner pile design and construction to provide technical support.Combination a pile-anchor engineering for construction monitoring data and the results of numerical analysis, the main research results are as follows:1,Through the cantilever deformation characteristics of deep foundation and the initiative state of earth pressure effect analysis, based on soil simplified model of corner pile numerical calculating model about the internal force, and through finite element analysis to study the process of excavation in the different conditions of the corner pile of internal forces change;2,Corner pile bear some torque and maximum torque appears in the pile body 1 / 3 range. Corner pile also bear a lot of pile two-way bending moment. Maximum bending moment along the pile is more discrete, with the construction process, usually it move from the upper part to the lower along the pile. However, the pile bending moment changes direction, that is, tension and compression side of the excavation with changes to the depth of change. Compared with other pile, Corner pile has obvious features of the force.3,Make inclinometer to measure the date of corner pile Department, that is a complex deformation. However, summing up measurements of horizontal displacement three corner piles Department, that have a certain regularity, that is, the horizontal displacement of corner pile will increase with the depth of the excavation and appear to change direction,;and when it pit at the end of the excavation, Horizontal displacement also point to foundation. This is basically the same as the results of numerical analysis, This is an important feature of the corner pile.4,Corner pile is bear internal complex forces and restrained torsion, internal force suffered the bending moment of pile also plays an important role. Therefore, the corner pile can't be partial uniform pile reinforcement, but to use the entire cross-section uniform reinforcement. For larger foundation set up a suitable angle to enhance the position angle of the pile stiffness, in order to prevent the emergence of the project by the torsion angle cut pile and the situation appears inclined cracks,it should be configured torsion bars, that is, to configure an appropriate amount of stirrups, to enhance the corner parts of the torsional shear capacity. Corner pile stiffness should also be supporting other parts of the pile to match in order to ensure that the entire support system of co-deformation, work together.5,The internal force and displacement change of corner pile is impacted by beams and bolt bound ,it should be of reasonable size and angle support beam crown.. Corner pile is recommended the use of uniform reinforcement, and the central pile foundation should be reinforced to increase.