Stress Simulation Analysis Of Inclined Pile Group

Inclined piles and columns is the pile foundation with a certain inclined angle of pile, the level bearing capacity of it is high, settlement is small, pile group effect is weak, so it is widely used in foundation treatment of transmission line, bridge, and wharf, some vertical piles are constructed to inclined pile. But because the complex geological conditions of inclined pile foundation, the difference of construction quality, the different construction method, the cost of field loading test is high, the theoretical research is relatively small and so on, the force character of inclined pile is not very clear. In terms of design, still with the straight pile for foundation, conducting calculation combined with engineering experience, this can lead directly to the design of conservative design and causes waste, or the high estimation for bearing capacity of inclined pile causes engineering hidden trouble. On the foundation of research on the inclined pile at home and abroad, this paper studies and analyzes mechanical performance of single pile and group pile inclined pile by using method of numerical simulation. The main work is as follows:(1) Through the analysis of the data of test results for both model of single pile, described the bearing mechanism of inclined pile, analyzed effect of tilt angle on the bearing capacity of single pile and the horizontal displacement of pile top.(2) By using the finite element software, analyzed the change regulation of the settlement of single pile top, the bending moment of the piles, pile stress with inclination angle of pile under vertical load; and analyzed the change regulation of horizontal displacement of the top of single pile, the bending moment of the piles with inclination angle of pile under horizontal load. Through analysis and comparison to determine more reasonable tilt angle of the single pile.(3) Analyzed the vertical force of inclined pile, may obtain the change regulation of settlement with the load for the same pile foundation, the variation trend of settlement with inclination angle of pile under the same load and the change regulation of the internal force of pile with the tilt angle.(4) Analyzed the horizontal force of inclined pile, the change regulation of the horizontal displacement of pile top with horizontal load for the same pile can be derived; analyzed the variation trend of the horizontal displacement of pile top with inclination angle of pile under the same loads; discussed the influence of inclination angle of pile on the body stress of pile.(5) Unchanged the level of load and changed vertical load, discussing the influence of vertical loads on the bearing capacity of pile foundation.(6) Analyzed the impact of the level cap on stress of straight pile, and the impact of different inclination angle of pile on inclined pile of the level cap.(7) Different forms of pile layout impacts on the stress of pile group, through the analysis of different forms of pile layout of inclined pile, one can get more reasonable layout form should make every single pile are fully and uniformly use of the carrying capacity, that is annular pile toward the periphery.