刚性长短桩复合地基竖向传力机制研究  

Vertical Transmission Mechanisms Study on Rigid Long-Short-Pile Composite Foundation

作　　者：郭弘[1] 李勐勋 王昆勇[3] 郭院成[4] 

机构地区：[1]郑州大学综合设计研究院,郑州450002 [2]洛阳市规划建筑设计院有限公司,河南洛阳471000 [3]南阳市疾病预防控制中心,河南南阳473002 [4]郑州大学土木工程学院,郑州450001

出　　处：《河南科学》2010年第11期1446-1449,共4页Henan Science

基　　金：国家自然科学基金项目资助(50978235)

摘　　要：利用三维有限元弹塑性分析方法,建立刚性长短桩复合地基模型进行模拟计算,分析了刚性基础下褥垫层对复合地基中长短桩的上刺入变形及桩侧负摩阻力的发生发展规律,以及不同位置短桩侧摩阻力和端阻力对长桩侧摩阻力发挥水平的影响规律,研究了刚性长短桩复合地基的荷载-沉降特性及长、短桩的竖向传力机制,建议了复合地基中长短桩的设计原则.A three-dimensional finite element model of rigid long-short-pile composite foundation was established using elasto-plastic analysis method. The working mechanism of cushion impacting on displacement up to cushion and negative skin friction of pile shaft in rigid pile composite ground was analyzed conceptually, and the development law of long-pile skin friction affecting by the shaft friction and the end resistance in different positions of short pile was analyzed also. The load-settlement behavior of the rigid long-short-pile composite foundation and the long and short pile transmission mechanisms were studied, and the design method of the rigid long-short-pile composite foundation was suggested in paper.

关 键 词：刚性长短桩 复合地基 数值模拟 桩侧摩阻力 

分 类 号：TU471.3[建筑科学—结构工程]