Analysis Of Bearing Behavior Of Large Diameter And Extra Long Bored Pile

With the popping of tall buildings and long span bridge, development of basic engineering field is also growing, especially in urban high-rise buildings in a growing number of large diameter overlength piles, constantly refresh the pile length. The status quo regardless of pile foundation in the research, design, testing, construction and materials have made new demands. Optimization of pile foundation of high-rise building scheme of urban construction engineering faces new challenges.This to Beijing CBD area Z15plots a engineering of big diameter super long drilled perfusion pile for cases, relies on Beijing city architectural design Institute complex structure Institute Foundation and based lab of engineering technology resources, reference engineering geological survey report and scene test information, used rock soil limited Yuan software, application three dimensional play plastic model and limited Yuan law on test pile for has numerical simulation and by force performance analysis, and existing test pile for programme than selected, tries to made has different of perfusion pile programme, and for engineering feasibility validation. Based on the analysis of results gives the conclusions, theoretical practical and achieved good results.It is well known that base civil engineering works is a top priority, not only for the quality of the project and project cost and duration have a vital role, this special is limited by cost and schedule, field test in Foundation pit has not been excavated until the end of the pit, they have carried out, test and design requirements different from, that was a challenge for us. According to geological exploration report combined with the specification of test piles to simulate and rational arguments, the set of parameters used to simulate the pile foundation design requirements, and presents a variety of bearing stratum of comparison and selection of programmes.Bearing capacity and displacement of foundation engineering is not only works, but rather taking into account the project integrated project for the interests of all parties, engineers and technicians are always need to rely on the specification, with the fact that as the yardstick, closely integrated and rational use of the survey report numerical analysis method for design and research.