摘要
通过对某滑坡抗滑桩加锚索处理工程中预应力锚索应力状态 2 年多的现场监测,讨论了锚索张拉过程中的荷载-位移关系,分析了煤系地层中预应力锚索的锁定损失及锁定后的应力损失过程。采用 GM(1,1)模型,对预应力损失过程进行了趋势性分析。结果表明,模型拟合精度高,得到的研究结果可为今后类似工程提供借鉴。
The load variations of each anchor in coal stratum are recorded with load cells for more than two years. The instantaneous losses of load that occurred during the lock-out operation have been measured. The load changes versus time after lock-out are analyzed. The comparison between measured deformations and calculated displacements at the heads of the anchors is discussed. The gray model, GM (1,1), of load loss is established. The trend of variation is researched. Results show that the gray model has a higher precision. This study is of referential value to construction and design for other similar projects.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第2期315-318,共4页
Rock and Soil Mechanics
关键词
预应力监测
预应力锚索
煤系地层
灰色模型
Anchor cables
Landslides
Loads (forces)
Prestressed materials
Prestressing