关键词: 青田水利枢纽, 围堰, 堰基, 高喷防渗墙, 防渗效果

Abstract:

Aiming at the seepage at the initial cofferdam foundation of Qingtian water conservancy project, the finite element method is adopted to analyze the influence of seepage treatment depth on the effect of seepage prevention. Combined with the factors such as the economy, rationality and feasibility of the scheme, the economical treatment depth is determined. The study result shows that as the decrease of the treatment depth, the seepage prevention would be less effective. Further, the seepage is closely related to the geological conditions where the bottom of high-pressure jet grouting wall locates, namely the lower permeability of the geology, the less seepage. By comprehensive study, the depth of 23 m is adopted.

Key words: Qingtian water conservancy project, cofferdam, cofferdam foundation, high-pressure jet grouting wall, effect of seepage prevention