The Application Research Of The Pile Foundation Project Of A Company’s Software Development And Production Building In The City Of Hefei

With the rapid development of national economy and engineering technology,more and more high,big,heavy buildings appeared in the people’s horizons,this gives the basic load demand brought greater and greater challenge.Large diameter excavated piles are widely used in this environment and are scattered throughout the world.Paper by a certain company software research and development production floor project of hefei as a case,according to the engineering geological conditions and construction conditions,from the perspective of ensure the construction safety and reduce costs as much as possible,through the use of artificial dig-hole pile stress form,failure mode and bearing capacity of single pile is analyzed,combining with the load transfer of the upper structure and foundation soil layer distribution of reasonable selection of the pile type and the parameters of pile(including diameter,depth and expand the head size,root number and steel reinforcement cage,concrete parameters,etc.)to optimize design.In strict accordance with the design of construction technology(measuring pile lofting-laying hole-step by step to dig holes and cast-in-situ concrete retaining wall-intermediate acceptance-expanding-pore forming acceptance-slag removal drainage-fixed hoisting,welding,steel reinforcement cage-pouring concrete pile)and safety technical measures and construction.With low strain reflected wave method and sound wave transmission method,respectively,to complete the dig-hole pile test,the bearing capacity of pile integrity and through analysis and comparison of two kinds of method of pile integrity testing data,found that the two methods results are very consistent,confirming the project of the 55 root pile integrity is good,so can judge the project artificial dig-hole pile up to the type of pile.