摘要
针对微型桩水平载荷的现场测试和原位试验相对困难,对其开展的研究很少,其荷载传递性状、受力特征等尚不能完全确定的问题,运用有限元软件ABAQUS对现场柔性微型桩(桩长与桩径之比一般大于50左右)试验进行数值模拟。数值分析结果和现场实测结果基本一致,说明模拟中的参数是有效并正确的,基本上能反映现场的实际情况。通过有限元模拟,探讨了微型桩在水平载荷作用下的工作性能,分析了微型桩的各个参数对其水平承载力的影响,给出了桩长、桩径、桩身弹性模量的合理取值,研究结果表明:较大的桩径、较高的土体摩擦角对提高柔性微型桩水平承载力有显著作用。
It is very difficult to measure the lateral load on the micropile in-situ, so the load transfer behavior and the stress characteristics are incomplete; so that numerical simulation of the flexible micropile （l/d more then 50 in general） with finite element software ABAQUS is made. The numerical analysis results are consistent with field measured results, so as to prove that the simulation parameters are effective and correct. They can reflect the field actual situation perfectly. Using finite element numerical simulation, the mechanical behavior of micropiles subjected to horizontal load, and parameters influencing on the lateral bearing capacity of micropile are discussed. Finally, some reasonable values of the pile length, pile diameter, elastic modulus and so on, are given. It is shown that the more larger diameter and the larger friction angle of soil, the more larger lateral bearing capacity of micropiles.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2011年第7期2219-2224,共6页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50608038)
关键词
水平承载力
数值模拟
受力性状
微型桩
lateral bearing capacity
numerical simulation
mechanical behavior
micropiles
