论文部分内容阅读
(一) 窄高型尾水管的特点窄高型尾水管和地面水电站中的普通弯肘形尾水管相似,也是由进口直锥管、肘管和水平扩散管三部分组成的,其中肘管可采用圆形断面,而水平扩散管则从圆形断面过渡到椭圆形断面(椭圆长轴垂直布置)。过去在修建地下水电站厂房时,由于缺乏经验,曾经直接采用普通弯肘形尾水管的设计数据,因而大大增加了石方开挖和混凝土浇筑工程量,‘提高了水电站造价。如地下水电站采
(A) the characteristics of narrow tailrace The narrow tailrace and ground-based hydropower station curved elbow similar to the ordinary, but also by the import straight cone, elbow and horizontal diffusion tube composed of three parts, including the elbow can be The use of circular section, while the horizontal diffusion tube from the circular cross-section of the transition to the oval cross-section (oval long axis vertical arrangement). In the past, when designing the underground powerhouse, due to lack of experience, the design data of ordinary curved elbows have been used directly, which greatly increased the excavation volume and the amount of concrete pouring projects and thus increased the construction cost of hydropower stations. Such as underground water power plant mining