【摘要】 根据深基坑桩基支护的特点,选取了软土天然含水量、重度、内摩擦角、粘结力、渗透系数、基坑的长度、宽度、深度、地下水位和工期状况10项具体指标,借鉴距离判别分析理论,利用国内大量的深基坑桩基支护实例作为学习样本进行训练,建立了桩基支护方式优选的距离判别分析模型,并利用回代估计法对建立的模型进行检验。结果表明:经过训练后的桩基支护优选模型误判率很低,判别能力很高。说明距离判别分析方法是解决深基坑桩基支护方式优选问题的一种有效方法,可以在实际工程中进行推广。更多还原

【Abstract】 According to the characteristics of deep foundation pit engineering,10 main specifications such as natural moisture,gravity,internal friction angle,cohesive force,permeability coefficient,length,width,depth of foundation pit,groundwater level and construction period status were taken into accounted and a distance discriminant analysis model has been established by training a lot of deep foundation pit real cases.The re-substitution method was also introduced to verify the stability of discriminant analysis model and the ratio of mis-discrimination is lower.The results show that discriminant analysis method provides an efficient way in solving the optimizing problem of supporting plan of pile foundation for deep foundation pit engineering and can be applied into actual engineering.更多还原