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首页> 外文期刊>Transportation Research Record >Analysis of Global Stability, Anchor Spacing, and Support Cable Loads in Wire Mesh and Cable Net Slope Protection Systems
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Analysis of Global Stability, Anchor Spacing, and Support Cable Loads in Wire Mesh and Cable Net Slope Protection Systems

机译：丝网和电缆网边坡防护系统中的整体稳定性，锚定间距和支撑电缆载荷分析

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摘要

Wire mesh and cable net slope protection have been in use for more than 50 years along North American highways to control rockfall on actively eroding slopes. The basic design of these systems is comparatively similar throughout North America. It consists of a top horizontal cable suspended by regularly spaced anchors, typically a perimeter or widely spaced grid of horizontal and vertical support cables, and double-twisted, hexagonal wire mesh laced to the support ropes. To date, the design of the slope protection systems has been based primarily on empirical methods, engineering judgment, and experience. Although these systems generally perform well, there is some consensus among geotechnical specialists that some elements in the system may be overdesigned or even unnecessary. In addition, system failures under a variety of loading conditions within the past few decades indicate that certain design elements may in fact be underdesigned for their desired application. Analytical and numerical models to evaluate the stability of slope protection systems are presented. The inclusion of interior horizontal support ropes in addition to the top horizontal rope does not reduce the stress within the mesh and accordingly provides no mechanical benefit. Results also show that the stresses on the vertical support rope are much smaller than the top horizontal support rope. Therefore, the vertical ropes do not need to be as strong as the top horizontal rope. Further, some useful design charts for the design of slope protection system are presented.
机译：钢丝网和电缆网的边坡防护已经在北美高速公路上使用了50多年，以控制活跃侵蚀的斜坡上的落石。这些系统的基本设计在整个北美相对相似。它由顶部水平电缆组成，顶部水平电缆由规则间隔的锚固件（通常是水平或垂直支撑电缆的周边或相距很宽的网格）悬挂，以及绑在支撑绳上的双绞六角形金属丝网。迄今为止，边坡防护系统的设计主要基于经验方法，工程判断和经验。尽管这些系统通常运行良好，但岩土工程专家之间存在一些共识，即系统中的某些元素可能设计过度，甚至不必要。另外，在过去的几十年中，各种负载条件下的系统故障表明，某些设计元素实际上可能并未针对其期望的应用进行设计不足。提出了评估边坡防护系统稳定性的分析和数值模型。除了顶部水平绳索之外，还包括内部水平支撑绳索并不能减小网格内的应力，因此没有提供机械效益。结果还表明，垂直支撑绳上的应力比顶部水平支撑绳小得多。因此，垂直绳不需要像顶部水平绳那样坚固。此外，还提供了一些用于边坡防护系统设计的有用设计图。

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