基于能源指数的道底变形趋势在轻微倾斜的层状页岩中的实验研究
Binke Chen1, Yinjun Tan2, Yuan Deng1
1School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
Materials (Basel, Switzerland)
|December 9, 2023
概括
在层层的页岩中建造道面临着底部变形风险. 这项研究引入了源自岩石能量演变的基于能源的指标 (SC),有效地预测道变形受到结构平面浸入角度和水含量的影响.
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
- 道工程 道工程是指道工程.
背景情况:
- 层状页岩的异质性和水敏感性导致道底部变形,影响结构安全.
- 现有关于岩石变形能量演变的研究缺乏对页岩的关注,页岩是道建设中的关键材料.
- 了解页岩中的能源动态对于预测和减轻道结构问题至关重要.
研究的目的:
- 在不同条件下,研究层状页岩在变形和损坏过程中的能量进化定律.
- 根据能源演变,开发一个区分指标 (SC) 来预测道底变形趋势.
- 分析结构平面入角 (Dφ) 和水含量 (Wc) 对页岩能源特性的影响.
主要方法:
- 在页岩样本上进行了常规和单周期装卸单轴压缩试验.
- 改变了页岩样本的结构平面 (Dφ) 和水含量 (Wc) 的浸入角.
- 在每个测试阶段分析了能量演变特征,包括弹性应变能量 (Ue) 和高峰后消散能量 (Up).
主要成果:
- 沉浸角 (Dφ) 和水含量 (Wc) 显著影响页岩的能量储存和消耗,影响损害演变.
- 储存的弹性拉伸能量 (Ue) 和总输入能量 (Ut) 之间建立了线性关系,这取决于Dφ和Wc.
- 开发的基于能源演变的指标 (SC) 准确地描述了层层的页岩中的道底变形.
结论:
- 该研究提供了一种基于能源的新型指标 (SC),用于评估层叠的页岩层中的道变形.
- 这些发现强调了Dφ和Wc在页岩的机械行为和能量消耗中的关键作用.
- 这项研究为评估和管理道结构在施工和运行过程中的变形提供了科学基础.
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