摘要
负摩阻力对桩基的承载变形性状有重要影响。分析了大面积堆载下、地基土固结过程中,桩顶荷载大小、桩端支承条件等因素对桩身负摩阻力、中性点位置的影响。结果表明,在地基土固结过程中,桩身负摩阻力、中性点位置也处于一个变化过程中。桩顶竖向荷载越大,中性点深度越浅,桩身承受的下拽力越小。研究还表明,在地基土固结过程中,桩的承载力逐渐减小。
Negative skin friction of pile is an important factor which should be considered in pile foundation de- sign.Studies on the negative skin friction of single piles under different pile-head loading were conducted.The re- sults show that the location of neutral point and distribution of skin friction of pile shaft and pile capacity vary with the surrounding soil consolidation and the pile-head loading conditions.The larger the value of pile-head loading,the deeper the location of the neutral point,and the smaller the drag load on pile shaft will be.
出处
《地下空间与工程学报》
CSCD
2007年第z1期1327-1329,1341,共4页
Chinese Journal of Underground Space and Engineering
关键词
负摩阻力
中性点
地基土
固结
negative skin friction
neutral point
soils
consolidation
作者简介
赵敏1970-),女,陕西咸阳人,副教授,主要从事岩土工程教学及科研工作.E-mail:zhaominxait@163.com
