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首页> 外文期刊>International Journal of Erosion Control Engineering >Standardized Stress Model for Design of Torrential Barriers under Impact by Debris Flow (According to Austrian Standard Regulation 24801)
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Standardized Stress Model for Design of Torrential Barriers under Impact by Debris Flow (According to Austrian Standard Regulation 24801)

机译：泥石流冲击下设计扭力屏障的标准应力模型（根据奥地利标准法规24801）

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摘要

Torrential checkdams with energy dissipating, filtering or deflecting function for debris flows are expected to be subject to extreme dynamic stress that requires the application of high safety standard for design, construction and maintenance. The standardized procedure for checkdam design has been developed from comparative calculations of common debris flow models from engineering practice and calibrated by impact measurements of debris flow laboratory experiments and data available from literature. The model is based on a combined static- dynamic stress approach, additional impacts by single objects like boulders are included. The dynamic area of the dynamic component is derived from a characteristic wetted cross section area of debris flow corresponding to the design event, which can be found at a characteristic cross section upstream of the checkdam. The static load is based on a hydrostatic fluid assumption and calculated analogously to water pressure (with debris flow density) and acts upon total construction height. The dynamic component is calculated according to the momentum equation and acts uniformly distributed on the dynamic impact area right below the overflow section up to a height of maximum 4 meters. The maximum local impact of a single boulder is defined to act on an area of 0.7 x 0.7 meter with 1MN. This new regulation shall guide practitioners for more objectives and save design of checkdams impacted by debris flows.
机译：具有消散，过滤或偏转泥石流功能的扭力止水坝预计将承受极大的动态应力，这要求在设计，建造和维护中应用高安全标准。止水坝设计的标准化程序是根据工程实践中常见泥石流模型的对比计算而开发的，并通过泥石流实验室实验的冲击测量和可从文献中获得的数据进行了校准。该模型基于静态-动态应力组合方法，其中包括单个物体（如巨石）的附加影响。动态分量的动态区域是从与设计事件相对应的泥石流的特征润湿横截面面积得出的，可以在止回坝上游的特征横截面处找到。静载荷基于静液压流体的假设，并类似于水压（具有泥石流密度）进行计算，并作用于总建筑高度。动态分量是根据动量方程计算得出的，并且均匀地作用在溢流段正下方最大4米高的动态冲击区域上。单个巨石的最大局部冲击力定义为作用于1MN的0.7 x 0.7米区域。这项新规定将指导从业人员实现更多目标，并节省受泥石流影响的防洪堤的设计。

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