Secondly , based on the analyses done with ansys5 . 7 fem program , the author analyzes bearing capacity and settlement character of long - short - pile composite foundation , and studies the load - transfer and the distribution pattern of the additional stress of long pile and short pile , and researches the primary parameters " effect to the whole performance of the long - short - pile composite foundation in the aspect of bearing capacity and settlement ; moreover , the author specially introduces the effect of the cushion 其次，本文利用ansys5 . 7分析程序，用二维有限元法分析研究了长短桩复合地基的承载力和沉降特性；探索了长短桩复合地基中桩的荷载传递性状、附加应力分布情况等，并考察了长短桩复合地基主要参数的变化对桩土荷载分担和复合地基沉降的影响；同时，突出了褥垫层的作用。
