(1. HydroChina Kunming Engineering Corporation，Kunming，Yunnan 650033，China；2. School of Engineering， Air Force Engineering University，Xi¢an，Shaanxi 710038，China；3. Hainan Electric Power Design Institute，Haikou，Hainan 570203，China；4. Institute of Geotechnical Engineering，Xi¢an University of Technology，Xi¢an，Shaanxi 710048，China)
Abstract：Taking into account the role of daub effect of loose pile and the weaken effect of other piles on drainage channels，on the basis of the stress conditions based on equilibrium equations and continuity equation under the conditions of consolidation，analytical solution of loose-flexible piles combination and loose-rigid pile combination of the composite foundation is obtained by the assumption that the infinite series solution. Examples of comparison between numerical and analytical results show that the basic analytical solution agrees well with numerical solutions. The consolidation speed of the composite foundation is relevant to the permeability coefficient and the compression modulus. The composite foundation consolidates rapidly when it has large permeability coefficient and the compression module. The results show that the proposed method is feasible.
