泸定水电站大型长廊式调压室合理施工通风散烟时间研究

泸定水电站大型长廊式调压室结构复杂,作业面多,施工通风散烟难度大。为改善施工通风效果,保证施工能安全、高效、快速地进行,采用基于流体力学理论的三维数值模拟其不同通风方案下一、二期的施工通风流场和有害气体扩散特性。给出了一、二期最优通风方案,并提出了相应合理的通风散烟时间。研究成果为通风方案优化和通风散烟时间的合理确定提供理论依据和技术支持。

Reasonable Time of Ventilation and Smoke Dissipation During the Construction of Large Gallery-type Surge Chamber of Luding Hydropower Station

Because of complex shape and multiple working faces, it’s difficult to ventilate and dissipate smoke in the large gallery-type surge chamber of Luding Hydropower Station. To improve the ventilation and secure the construction, a numerical simulation method based on fluid mechanics theory is applied to the research of airflow distribution and harmful gas diffusion of different ventilation options in the first and second construction stage. The optimum ventilation scheme of the first and second construction stage is given, and the corresponding reasonable time of ventilation and smoke dissipation is put forward. The research result serves as a theoretical basis and technical support for the determination of ventilation time in the construction of hydropower station.