倒虹吸隧道智能排污结构构想与数值分析

为减少甚至解决倒虹吸隧道中污物沉积和堵塞问题，提出一种新型倒虹吸隧道工作井智能排污结构。利用SolidWorks软件对隧道及工作井进行建模和数值模拟优化，并进行物理模型试验验证。研究结果表明： 1）外加辅助块体有助于降低湍流位置，而在一定范围内改变入口处水流流速对引水结构的影响不大； 2）在工作井内加入矩形三角块和在入口区加阶梯双三角块、出口区加矩形三角块是倒虹吸隧道较优的智能排污结构方案； 3）雨水方沟断面尺寸大小会对水流湍流位置和流速分布有所影响，但添加适当的辅助块仍具有较好的智能排污效果。

Conception and Numerical Analysis of Intelligent Sewage  Discharge Structure in Inverted Siphon Tunnel

The sewage often deposites in inverted siphon tunnel and even blocks the tunnel. Hence, a new type of intelligent sewage discharge structure for work shaft of inverted siphon tunnel is proposed. The tunnel and working shaft are modeled and numerically simulated by software SolidWorks, and the physical model test is carried out. The research results show that: (1) The addition of the auxiliary block helps to reduce the turbulent flow position; and changing the flow velocity of the inlet at a certain extent has little effect on the water diversion structure. (2) The scheme of adding a rectangular triangle block in the work shaft and the scheme of adding a stepped double triangle block in the inlet zone and the rectangular triangle block in the exit zone are the optimal intelligent sewage drainage schemes for the inverted siphon tunnel. (3) The size of the rainwater gully section will affect the turbulent flow position and velocity distribution of the water flow, but the appropriate auxiliary block would still achieve a better intelligent sewage discharge effect.