Study on the Bearing Capacity of Concrete-Cored DCM Pile Composite Foundation

摘要

A new kind of pile named concrete-cored DCM pile is developed in recent years. It is composed of precast core pile and deep cement mixing (DCM) column socket. The mechanisms and calculation method of bearing capacity for concrete-cored DCM pile in composite foundation are not clear. In this paper, plate load tests on single pile (PLT-Ⅰ) and plate load tests on single pile in composite foundation (PLT-Ⅱ) are conducted in Nanjing-Changzhou (NC) Expressway and Nanjing Surrounding (NS) Expressway Based on results of PLT, stress tests and CPT, the foundation improvement effect and bearing mechanisms of concrete-cored DCM pile were discussed. Finally, the calculation method for the bearing capacity of concrete-cored DCM pile composite foundation is proposed.