| 张昕*,乐金朝,刘汉东.砂土中锚板抗拔性能试验研究[J].实验力学,2011,26(4):411~416 |
| 砂土中锚板抗拔性能试验研究 |
| Experimental Study on the Uplift Performance of Plate Anchor in Sand |
| 投稿时间：2011-03-20 修订日期：2011-05-28 |
| DOI： |
| 中文关键词: 锚板 抗拔性能 临界埋深 |
| 英文关键词:plate anchor uplift performance critical embedment depth |
| 基金项目:河南省岩土力学与结构工程重点实验室开放基金资助(项目编号：ncwu-2010-02) |
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| 中文摘要: |
| 运用自行研制开发的试验装置和数据采集系统，对锚板在砂土中的抗拔性能进行了试验研究。分析了锚板在松砂和密砂两种情况下抗拔力和位移的关系曲线特征，研究了不同埋深率下抗拔力和破坏系数的变化规律，并根据抗拔力与破坏系数随埋深率的变化趋势得到了松砂和密砂状态下的临界埋深率。试验结果表明，密度对砂土中锚板的抗拔性能有非常大的影响，增加砂土的密实度可以大幅度提高锚板的抗拔承载力并显著减小锚板的位移变形。增加锚板的埋置深度同样也可以大幅提高锚板的抗拔承载力，但抗拔承载力的增加幅度受临界埋深率的限制，临界埋深率随密度增加有增大的趋势。该试验结果可为锚板上拔预测模型的建立及设计提供参考依据。 |
| 英文摘要: |
| Investigation on the uplift performance of plate anchor in sand was carried out by using a self-developed experimental device and a data acquisition system. The characteristics of load-displacement relationship for an uplifting plate anchor in both loose and dense sand were analyzed, respectively. The influence of embedment depth ratio on the ultimate resistance and breakout factors of plate anchor in both loose and dense sand were also studied, respectively. The critical embedment depth ratio for both loose and dense sand was also determined based on the relationship among the ultimate resistance, breakout factors and embedment depth ratio. Results show that the sand density has a significant influence on the uplift performance of plate anchor in sand. The ultimate resistance of plate anchor in sand increases obviousely while the displacement of plate anchor at peak point decreases along with the density increasing. The tendency of plate anchor ultimate resistance increasing along with the embedment depth depends on the critical embedment ratio which is also influenced by sand density. These results are of benefit to the model establishment for plate anchor uplift prediction and plate anchor design. |
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