从实测温度探求宝瓶大坝面板后渗压成因

基于原型监测成果,特别是实测温度成果,对宝瓶大坝蓄水以来面板后垫层料内形成的高渗压水头进行了分析判断,确认了其真实可信,探求了其形成和发展的原因。研究结果表明,面板后高渗压水头来自坝前库水,板间缝是渗漏通道。面板局部也有破损,虽因在坝前铺盖层以下渗漏并不严重,也应作为隐患之一加以关注。

Exploration on causation of seepage pressure behind face-slab of Baoping Dam based on measured temperature

Based on the results of the prototype observation， especially the measured temperature， the high seepage pressure head created in the cushion layer behind the face-slab since the impoundment of Baoping Dam is analyzed and estimated， and then the causation of its creation and development is explored herein. The study result shows that the high seepage pressure head comes from the water of reservoir in the front of the dam and the face-slab joints are the seepage passages， furthermore， some local damages are there on the face-slab. Though the seepage under the upstream blanket in the frontof the dam is not so serious， it also must be taken as a potential risk and an attention must be made on as well.