Abstract:

The inter-pile soil can be fully mobilize to participate in the work of load-sharing and vertical rigidity change in the trend be the same with the additional load stress dispersion changes under the action of long and short piles high strength composite foundation. Based on the calculation model of long and short piles composite foundation considering different lengths of piles, different stiffness of piles and soil layer distribution around the pile, long and short piles high strength composite foundation of high-rise building can be calculated and analyzed; through a case study, it is shown that the long and short piles high strength composite foundation can meet the requirements of the bearing capacity and settlemen of high-rise buildings. The high-rise construction pile foundation will face enormous challenges, because of its high bearing capacity, economic superiority, flexible construction and short construction period.

Key words: long and short piles high strength composite foundation, high-rise building;interaction, shear displacement method