摘要
目前对横向受载刚性桩的研究主要集中在其承载力方面,对变化规律研究很少。为此提出了利用刚性桩上两点位移求桩上任意一点位移、桩回转中心位置及转角的方法。通过对粉质黏土中的刚性桩进行模型试验与数值计算发现,回转中心位置随位移和载荷的增大,先是急剧下降,然后变缓,最后基本趋于稳定,而且桩埋置参数与土力学参数对回转中心位置的变化规律影响很小;而桩的转角随位移增大近似线性变化。比较发现,由试验和数值计算得到的回转中心极限位置与由极限地基反力法得到的结果相差不大。
The researches on rigid piles were mostly focused on their beating capacities; and few people studied their deflections. So a method for determining rigid pile positions is put forward; and thus the displacement of any point on pile, the position of rotation center and the deflection angle of rigid pile can be obtained from the lateral displacements of any two points on rigid pile. The rigid piles embedded in silty clay are tested and analyzed numerically. It is found that the rotation center falls sharply firstly, then descends slowly and finally tends to be stable with displacement and load. Embedding parameters of piles and mechanical parameters of soil have few effects on the varying laws of the position of rotation center with lateral loads. The deflection angle of rigid pile increases linearly with loads on the whole. By comparison, it is found that the ultimate positions of rotation centers obtained from test and numerical analysis are consistent basically with those from some limit subgrade reaction methods.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第7期1092-1096,共5页
Rock and Soil Mechanics
基金
国家973项目(No.2002CB412706)
国家自然科学基金项目(No.10372104)资助
关键词
刚性桩
横向载荷
回转中心
转角
rigid piles
lateral loads
rotation center
deflection angle
