LI Cheng-fang, WU De-lun, DENG Xiao-bo, et al. In-situ test and analysis of interaction between tall building and pile-box foundation[J]. 2008, 29(9).DOI:
Based on the in-situ test of pile-box foundation for a tall building
variation charateristics of box foundation
including steel stress of base slab
deformation and settlement of foundation
earth pressure under box
and load sharing ratio between pile and box
etc. are described. The results indicate that the steel stress of base slab is only 8% of its design strength; and settlement of foundation is only 20% of the theoretical calculaed value. Overall flexure value of foundation is only 0.319 ‰; so local flexure is main influence factor on base slab. Soil can only share 11% of the load above and the contact pressure is very small comparing with its resistance capacity. In order to improve earth pressure under box and reduce construction cost