Research Progress On The Project Behaviorof Pile Under Pullout Loads

The pile with branches and plates is the recent development of a new type of pile. The pile with branches and plates has a high carrying capacity, good solid embedded and more economical characteristics ,so it has a wide range of applications.Much research has been done about the performance of compression strength of piles presently, while little is about the uplift resistant performance of piles. This paper introduces the pile with the characteristics of the construction process and research the status quo,model testing and ANSYS finite element analysis software in the drawing pile load bearing capacity and the load transfer mechanism.Research shows that the pile-Uplift compressive failure mode and failure mode is different, and this has also decided to set up a different plat lacation of pile.According to comparative test Single-plate pile bearing uplift capacity is 2.6 times the pile straight, and its more than 15 per cent of the amount of concrete, we can see that pile of sticks is a very substantial economic benefits,While the amount of concrete more than 15%. This shows that the economic benefits of pile-it is very impressive. The pile-disc set itself the increase in the number sometimes do not necessarily show the increasing capacity uplift. Its capacity also depend on the size of the pile failure mode. A plate and plate from the same number at the same time do not pile bearing capacity of the different distance between plates. But the greater distance is not set higher capacity, and the nature of soil, the depth of the buried set.In the branch-pile different locations paste strain gages planted in the soil and the pressure box, can be measured in the corresponding data. Through data analysis know-pile in the role of Stubbs load under its load transfer mechanism. Branch pile load gradually reduced and the supremacy in the branch location of the mutation occurred load, the load was significantly reduced, the branch load will be transmitted to the soil around the pile. Branch makes the existence of the pile greatly enhance its anti-uplift capacity.