基于螺栓固定系统故障机制,研究合理的固定长度
Meng Wang1, Liyou Shang2, Baoan Zhang1
1College of Mining, Liaoning Technical University, Fuxin, Liaoning, China.
Scientific reports
|December 21, 2023
概括
这项研究分析了岩石螺栓 anchor 系统,揭示了接口剪切应力和刚性显著影响负载能力. 优化 anchorage 长度和降低接口剪切刚度是防止地下工程故障的关键.
科学领域:
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
- 结构工程 结构工程
背景情况:
- 预应力岩系统对于地下稳定性至关重要.
- 了解系统故障机制对于安全设计至关重要.
- 现有的设计方法可能无法完全解释接口行为.
研究的目的:
- 分析预应力岩系统的故障机制.
- 导出轴力,容量和界面剪切力的理论方程.
- 为了研究接口特性和 anchorage 长度对故障的影响.
主要方法:
- 导出性能理论方程. 性能理论方程.
- 压力分布和接口故障的分析.
- 实地岩石螺栓拉出测试和数值模拟.
- 开发一个岩石螺栓长度设计方法.
主要成果:
- 最终负载能力强烈依赖于界面切割应力和刚性.
- 增加 anchorage 长度和减少接口剪切刚度可以减轻应力度.
- 二级接口故障是系统故障的主要原因.
- 接口损伤演变,峰值剪切应力向 anchorage 底部转移.
结论:
- 拟议的长度计算方法和设计过程是可行的.
- 结果为确定岩石螺栓 anchorage支持参数提供了一个参考.
- 优化接口特性和 anchorage 长度可以提高岩石螺栓系统的性能.
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