摘要
官地水电站右岸导流洞进口渐变段50m断面由方形渐变到标准城门洞形,最大开挖跨度25.6m,高度25.3m,呈弱风化状态,为Ⅳ类玄武岩。在施工过程中该段经历两次塌方,分别两次对塌方段进行相应支护处理。根据隧洞结构和地质资料建立三维有限元数值计算模型,对塌方段各工况进行分析,证明了塌方支护处理的合理性和安全性。
The 50m cross section of the entrance of the diversion tunnel on the right bank of Gongdi hydropower station has gradually changed into a standard gate shape. The maximum excavation span is 25.6m, the height is 25.3m with slight weathering and Class IV basalt. During the construction, the section has experienced two collapses, and the timbering treatments are provided for the two collapses. In the thesis, the 3D finite element calculation model is established to analyze the working conditions of the collapsed sections, and the rationality and safety of the timbering treatment have been proved.
出处
《中国水能及电气化》
2011年第7期48-54,60,共8页
China Water Power & Electrification
关键词
官地水电站
导流洞
进口渐变段
塌方
支护
计算
gongdi hydropower station
diversion tunnel
entrance gradual changing section
collapse
timbering
calculation
