基于响应曲面法的双排桩支护结构优化设计

Optimization Design of Double Row Pile Support Structure Based on Response Surface Methodology

以双排桩嵌固深度、桩径、桩距和排距作为影响因素,基坑抗倾覆稳定性系数和最大水平位移作为响应,用均匀设计安排不同结构尺寸组合的双排桩支护方案,通过回归分析建立双排桩稳定性、变形与其结构尺寸的响应关系,作为目标函数优化求解。用专业设计软件计算基坑抗倾覆稳定性系数和最大水平位移,以回归方程作为目标函数,通过优化求解,得到双排桩支护结构的最优方案。

Taking the embedding depth,pile diameter,pile distance and row distance of double row pile as the influencing factors,and taking the anti-capsizing stability coefficient and maximum horizontal displacement of foundation pit as the response,the uniform design was used to arrange the double row pile support scheme with different combination of the structure size.By means of regression analysis,the response relation between the stability and deformation of double row pile and its structure size is established,which is optimized and solved as an objective function.The anti-overturning stability coefficient and maximum horizontal displacement of foundation pit are calculated by professional design software,and the regression equation is taken as the objective function,and the optimal scheme of double row pile supporting structure is obtained by optimizing the solution.