Bearing Performance Research Of DDC Pile Composite Foundation

Piles thrusted-expanded in expanded in column hammer composite foundation is a new technology evolved from soil compaction pile method and dynamic compaction. The method can significantly improve the bearing capacity, reduce settlement and eliminate construction waste. In dealing with collapsible loess foundation, the method which can effectively reduce the porosity and eliminate collapsibility, are widely used in engineering. But the Theory of development has lagged behind the practice. So we urgently hope to come up with better programes through theoretical study of reinforcement theory of piles thrusted-expanded in expanded in column hammer composite foundation and optimization.This paper studied the bearing performance and eliminating collapsibility of piles thrusted-expanded in expanded in column hammer composite foundation. Studies have shown that Piles thrusted-expanded in expanded in column hammer composite foundation can effectively reinforce soft ground and eliminate collapsibility. We verified the feasibility that the act can reinforce foundation by project.Using ANSYS finite element software, we simulated single pile model. Simulation was compared with the measured values, and the error between the two results was analyzed. Effectiveness and practicality have been proved, through ANSYS simulate the Piles thrusted-expanded in expanded in column hammer.Established a multi-pile model about Piles thrusted-expanded in expanded in column hammer composite foundation, we compared the factors that affect the reinforcement of foundation by changing the variables. That will play a guiding role for engineering practice by using Piles thrusted-expanded in expanded in column hammer composite foundation.