Plasto-elastic Analysis For Soil Around Anchor Jacked Pile

Anchor jacked pile is a new technique researched by ourselves for building reinforce and has some strongpoint others have not. Twenty years' popularization makes this technique widely used. Now anchor jacked pile can be applied in some other project such as correction, ground strengthening, pile foundation's top-down construction in newly built building.hi spite of twenty years' usage in engineering, anchor jacked pile bases on no compellent theory.This paper works primarily in the following aspects:1 .Introduction of anchor jacked pileAs a new technique, few people realize it. This paper will introduce anchor jacked pile about its history, strongpoint, construction course, research status quo and some existent problems.2. Elastic-plastic analysis for soil around anchor jacked pileIn this paper, the course of penetration is regarded as expansion of cylindrical cavity in infinite soil mass. Combining with the knowledge of elastic mechanics and plastic mechanics, we can make analysis for soil around pile. Finally, we can educe the cylindrical cavity pressure, radius of plastic zone, radical displacement in elastic zone, excess pore water pressure in soil around pile and spherical cavity pressure at the end of pile.3. CalculationANSYS software will be used to calculate cavity pressure and radius of plastic range whose data will be contrasted with those worked out by formula. Analysis will be made about their differences and the causes of them, and strongpoint and shortcoming of twodifferent methods.4. ConclusionThere are still some problems in the paper. The final part also discusses the prospect of anchor jacked pile.This thesis in the paper will play a great role in popularizing anchor jacked pile. In this paper, the research of anchor jacked pile is still in its elementary phase, more work should be done to improve it in the future so as to guide the practical engineering.