摘要
桩承式水平加筋复合地基是“水平向增强体+竖直向增强体”的联合复合地基。通过分析其变形特点,对水平向增强体变形假定由曲线推广到曲面,引入W inkler地基模型并根据以沉降控制设计的思想,基于桩间单元的受力平衡条件,推导出上部荷载作用下桩承式水平加筋复合地基承载力和桩土应力比计算公式;结合算例,分析了桩间距(置换率)、工后沉降量、地基反力系数等因素对承载力及桩土应力比的影响。
The working mechanism of geosynthetic-reinforced and pile-supported composite grounds （GRPSCG） was analyzed, based on which, the deformation of reinforced cushion was assumed paraboloidal. With Winkler model considered, the equilibrium equations were established by examining the equilibrium of inter-pile cells and formulas for calculating the bearing capability and the stress ratio between soil and pile were deduced on the basis that settlement controls designation. Besides, the relationship between the bearing capability and the stress ratio between soil and pile and their affecting factors as pile distance, after-construction settlement and spring coefficient of soil were analyzed.
出处
《中南公路工程》
2007年第2期73-76,90,共5页
Central South Highway Engineering
基金
湖南省自然科学基金(03JJY3087)
湖南省科技攻关资助项目(02GKY3024)
