The Study About Factors Analysis And Research Of Bored Pile In Excavation

With high speed development of China’s national economy, the construction industry atan alarming rate, the foundation pit a range of issues facing a bad environment is complex anddiverse forms of support, it has become one of the hot issues of basic engineering. Cantileverpile deep foundation support in China has been widely used, it has a simple construction, anda good supporting performance advantages. Continue in-depth study of a variety ofconstruction conditions and factors that support the performance of the cantilever pile, deepfoundation engineering study has very important significance.Deep foundation support engineering research trends and practical needs at home andabroad, in the summary of existing research results on the basis of the elastic-plastic model ofthe Drucker-Prager yield criterion, the contact elements, excavation element simulation ofBirths and Deathsanalyzed hierarchical excavators and one-time excavation of two differentconditions, as well as the pile diameter, pile-soil modulus of elasticity of soil, the value ofvarious factors on the impact of the support piles engineering properties, and analyze theimpact of the law. Finally, the model results with the theoretical results compared to verify thefeasibility of application of the ANSYS program.The study shows that: first stratified excavation can effectively control soil uninstallproblem too quickly, can reduce the pile level direction of varying degrees of displacement,pile stress and pile lateral soil pressure. Second, the pile diameter increases can reduce thelevel of the pile displacement, while the pile stress. Third, the pile elastic modulus and soildeformation modulus of the pile stress, displacement is obviously the direction of the pilelevel. Fourth, the displacement of the soil, the value change of pile horizontal direction pilestress, Pile pressure is obvious. These results on the design and construction of deepfoundation pit support engineering has important guiding significance and practical value.