摘要
某水电站水库库底放空洞因进水口检修闸门长期挡水及无法紧急下闸,需进行后期改建。从减少经济投入考虑,改建采用由混凝土封堵体、预埋钢管、钢制封头和进人孔构成的联合封堵结构,其中混凝土封堵体、预埋钢管、钢制封头的承压受力结构较为明确,可分别进行计算。钢制封头上设进人孔会使封头开孔处产生显著的局部应力成为结构的薄弱点,需采用三维有限元分析计算。详细论述了放空洞封堵系统各部位的设计,其方法可为类似工程封堵设计提供参考。
Due to long term water retaining,the overhaul gate of release tunnel of a hydropower station can not be closed in emergency and needs to be reconstructed. In the view of reducing investment,we adopt a united plugging system composed of concrete blockage,pre-buried penstock,steel blocking head and manhole. In the system,the force structure of the concrete blockage,penstock and steel blocking head are definite and the stress could be calculated respectively. The manhole set on the steel blocking head would produce significant local stress and becomes a weak point,so three dimensional finite element analysis is needed in the calculation. The design details for various parts of the united plugging system are introduced,which could provide reference for the similar plugging project.
出处
《人民长江》
北大核心
2016年第17期56-59,共4页
Yangtze River
关键词
封堵系统
进人孔
放空洞
水电站
plugging system
manhole
release tunnel
hydropower station
