浙江大学学报（理学版）2016，Vol.43Issue(5)：587-592,6.DOI:10.3785/j.issn.1008-9497.2016.05.016
基于动床模型的泥石流虹吸排水分流池自清淤能力研究
Analysis on the self-dredging capability of siphon drainage pool of debris flow based on the movable bed model
摘要
Abstract
The occuring of debris flow in the valley involves concurrently three basic conditions which include rich loose deposits ,enough water and favorable terrain .Controlling hydrodynamic condition is an effective method to pre‐vent the occurrence of debris flow .The siphon drainage technology of self‐dredging ability and water separation can discharge excess water from debris flow gully to downstream security zone so as to weaken hydrodynamic conditions in the debris flow gully ,hence preventing the occurrence of debris flow .However ,self‐dredging capability of siphon drainage pool is the premise to ensure the efficiency and durability of debris flow control .By using computational fluid dynamics software CFD together with Euler movable bed model ,a three‐dimensional numerical model is estab‐lished to analyze the hydraulic characteristics of the flow in the drainage pool .Mathematical model of sediment incip‐ient motion and suspension is established at the same time .Furthermore ,it verifies the feasibility of siphon dredging by employing the physical model .Results show that uneven bottom bed is conductive to sediment incipient motion and suspension .While the water head having difference between inlet and outlet ,particle size ,deposition thickness and mutual collision between sediment particles all can affect the siphon dredging efficiency .The above results can guide the design of siphon drainage pool in practical debris flow prevention engineering ,such as how to choose the water head having difference between inlet and outlet ,and the diameter of the barrier grid .关键词
泥石流/虹吸排水/自清淤/CFD/欧拉动床模型Key words
debris flow/siphon drainage/self-dredging/CFD/Euler movable bed model分类
天文与地球科学引用本文复制引用
陈晓辉,徐毅青,孙红月,余文飞..基于动床模型的泥石流虹吸排水分流池自清淤能力研究[J].浙江大学学报（理学版）,2016,43(5):587-592,6.基金项目
国家自然科学基金资助项目（41272336）；浙江省教育厅资助项目（Z201122174）． （）
