Research On The Uplift Bearning Capacity Of Bored Pile

With the development of industry and urban scale expands unceasingly, Lots of high-rise building are being spring up,more and more underground structures are built widely. While many of these structures suffer the load of uplift, so more and more researchers pay close attention to the structures of resisting the uplift load. On Civil engineering, Using the tension pile can solve the uplift of foundation well by which is the most popular of resistance foundation. comparatively speaking with the compressive pile, Our knowledge about the Load-bearing mechanism and Stressed deformation of tension pile are far behind. So much of design method and theory knowledge about the tension pile still rely on the basic theory of compressive pile. However, the researchers found that the relationship of Load-bearing mechanism between the compressive pile and tension pile seems to be discreteness because of the tension pile Load-bearing properties is affected by many factors. So we can better able to know about the Load-bearing mechanism and Stressed deformation of tension pile by much more experiment.By analysis and summarize the material about the tension pile in this paper, introduce the influence factors of Load-bearing properties of bored pile systematically, and put forward the Calculation method of uplift capacity. Through the existing research theory of socket piles, this paper puts forward the bilinear model of load transfer between pile and soil. According to the load transfer theory, and further analyzed the affection of working-point of uplift load to Side friction.Relying on the xindi bored pile test of nanchang, test the uplift pile and draw the curve of load-displacement. By using the reinforcement meter to measure axial force and side friction at different cross-section under Various load which is being set on the steel reinforcement cage advanced.It will provide us with reliable data to analysis the mechanical properties of tension piles.By using the ABAQUS to simulate the static loading test of tension pile and draw the curve of load-displacement and side friction distribution. Then can we found that the result is consistency with the static loading test, it demonstrate that ABAQUS can simulate the bearing capacity of tension pile. At the same time, through ABAQUS software to simulate the Variation of material parameter influence on tension pile's bearing capacity, some valuable learning about influential discipline of the factors affect on the stress and deformation mechanism of tension pile.Calculated by ABAQUS to simulate the tension piles resistance static load test pile, and get the displacement curve and pile load-side friction distribution curve and the static load test measurement results consistency is good, explain ABAQUS software can better simulation resistance load-bearing properties of tension piles. Meanwhile, through ABAQUS software to simulate the further material parameters of piles and soil against the capacity and pull the influence of pile top displacement, get pulled pile load factors deformation law against some of the valuable harvest.