Experimental and Numerical Simulation Study on Cement-Soil Pile Composite Foundation

Cement-soil piles composite foundation has been extensively used to enhance the bearing capacity and induce the settlement of the silty soil.With the silty soil collected in Zhuhai,four kinds of static load tests on cushion height of cement-soil piles composite foundation were carried out and discussed in this article.Numerical simulation analysis was performed on the composite foundation with FLAC3D based on the tests results.Then the simulation settlement curves of composite foundation with four kinds of cushion height were obtained,which are consistent with the empirical test curves.The supporting capacity and settlement of composite foundation with various pile diameters and pile spacing were calculated by this model.The influences of pile diameter and pile spacing on supporting capacity and settlement of composite foundation were discussed.With the comparison of two plans,suggestions are made for the better to design of cement-soil piles composite foundation.