Influencing Factors and Optimization Design of Cement Fly-ash Gravel Pile

CFG pile composite foundation treatment technology is one of the most commonly used foundation reinforcement technology. Its parameter design usually adopts the trial algorithm. Under the premise of meeting the design requirements, there are many combinations of different parameters, and it is difficult to find the most economical design scheme. By analyzing the design parameters of CFG pile composite foundation, the main influencing factors of the reinforcement effect are pointed out. With the pile length, pile diameter and pile spacing as optimization variables, the main design parameters of CFG pile composite foundation are optimized by using Matlab optimization toolbox under the premise of meeting the design requirements of composite foundation and aiming at the minimum pile engineering cost. The method is applied to a practical project, and the results show that the optimization method is effective, which can reduce the cost and improve the economic benefit under the premise of meeting the requirements of the code.