Numerical Simulation on Bearing Capacity of Composite Foundation System Combined with Walled and Columniform Soil Improvement

Based on distribution characteristics of the settlement of homogeneous soil under uniform distribution loads, a composite foundation system combined with walled and column form soil improvement was presented. In this raft foundation system, different column form soil improvements in size and depth are used, so to the ground rigidity distribution will nearly follow the settlement of homogeneous soil under uniform distribution loads, and the differential settlement may be controlled effectively. In this paper, numerical simulations are performed to study the influence of column form soil improvements in size, position and depth on settlement, also the results from numerical simulation of load-settlement relationship are compared to 6 models tests and all in good agreement.