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Design method of natural stone constitutive multistage step-deep pool energy dissipation system
The invention relates to a design method of a natural stone constitutive multistage step-deep pool energy dissipation system. The design method comprises the following steps: determining a controlled section as a placement position of an artificial step according to topographic data or a field exploration result of a target river channel, and determining the position of each step according to the calculated average interval of the artificial step, then obtaining the scouring depth under the designed flood flow condition and the length of a scouring pit in a deep pool through calculation, using the critical scouring depth damaged by the step-deep pool as a quantitative index required by the stability of a structural unit, increasing the number of the artificial steps by reducing the average spacing of the artificial steps so as to improve the overall stability, and finally, obtaining the water flow velocity and the water depth at each step through step-by-step iterative calculation so as to complete the water flow energy distribution calculation. The comprehensive design method considering the stability requirement of the structure and the water flow energy consumption requirement is provided, and the design method is suitable for actual mountainous river ecological restoration and mountain torrent control engineering projects.
本发明涉及一种天然石块构成型多级阶梯‑深潭消能系统设计方法，该方法通过对目标河道的地形数据或现场勘查结果确定控制性断面作为人工阶梯的摆放位置，并根据计算的人工阶梯平均间距确定各级阶梯位置，再通过计算得到设计洪水流量条件下的冲刷深度和深潭中的冲刷坑长度，使用阶梯‑深潭破坏的临界冲刷深度作为结构单元稳定性要求的量化指标，当超过临界冲刷深度时，通过缩小人工阶梯平均间距来增加人工阶梯数量以提高整体稳定性，最后经逐级迭代计算得到各级阶梯处的水流流速和水深，完成水流能量分布计算，本发明提供了兼顾结构自身稳定要求和消耗水流能量需求的综合设计方法，适用于实际山区河流生态修复和山洪防治工程项目。
Design method of natural stone constitutive multistage step-deep pool energy dissipation system
The invention relates to a design method of a natural stone constitutive multistage step-deep pool energy dissipation system. The design method comprises the following steps: determining a controlled section as a placement position of an artificial step according to topographic data or a field exploration result of a target river channel, and determining the position of each step according to the calculated average interval of the artificial step, then obtaining the scouring depth under the designed flood flow condition and the length of a scouring pit in a deep pool through calculation, using the critical scouring depth damaged by the step-deep pool as a quantitative index required by the stability of a structural unit, increasing the number of the artificial steps by reducing the average spacing of the artificial steps so as to improve the overall stability, and finally, obtaining the water flow velocity and the water depth at each step through step-by-step iterative calculation so as to complete the water flow energy distribution calculation. The comprehensive design method considering the stability requirement of the structure and the water flow energy consumption requirement is provided, and the design method is suitable for actual mountainous river ecological restoration and mountain torrent control engineering projects.
本发明涉及一种天然石块构成型多级阶梯‑深潭消能系统设计方法，该方法通过对目标河道的地形数据或现场勘查结果确定控制性断面作为人工阶梯的摆放位置，并根据计算的人工阶梯平均间距确定各级阶梯位置，再通过计算得到设计洪水流量条件下的冲刷深度和深潭中的冲刷坑长度，使用阶梯‑深潭破坏的临界冲刷深度作为结构单元稳定性要求的量化指标，当超过临界冲刷深度时，通过缩小人工阶梯平均间距来增加人工阶梯数量以提高整体稳定性，最后经逐级迭代计算得到各级阶梯处的水流流速和水深，完成水流能量分布计算，本发明提供了兼顾结构自身稳定要求和消耗水流能量需求的综合设计方法，适用于实际山区河流生态修复和山洪防治工程项目。
Design method of natural stone constitutive multistage step-deep pool energy dissipation system
一种天然石块构成型多级阶梯-深潭消能系统设计方法
ZHANG CHENDI (author) / XU MENGZHEN (author) / WANG ZHAOYIN (author)
2021-04-09
Patent
Electronic Resource
Chinese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
Experimental Study on the Energy Dissipation Ratio of Step-pool System
| British Library Conference Proceedings | 2013