古城水库帷幕灌浆防渗能力衰减原因分析与对策研究

Causation analysis and countermeasure study on anti-seepage capacity attenuation of curtain grouting for Gucheng Reservoir

介绍了古城水库4次帷幕灌浆和帷幕防渗能力衰减的情况,从7个方面分析了帷幕防渗能力衰减的原因:浆液水灰比,设计因素,施工工艺,水库水位,环境水侵蚀,淤积减渗作用,不良地质条件。对照以上原因对古城水库4次帷幕灌浆进行了分析,提出了今后帷幕灌浆的改进建议。分析方法可为类似工程提供借鉴。

4 curtain groutings for Gucheng Reservoir and the anti-seepage capacity attenuations of them are briefly introduced herein,and then the causations of the anti-seepage capacity attenuations are analyzed from the aspects,i. e. the water-cement ratio of the grout,the design factors,the construction technology,the reservoir water level,the erosion from environmental water,the effects of sedimentation and infiltration reduction,the poor geological condition. Contrasting with the causations mentioned above,the 4 curtain groutings made for Gucheng Reservoir are analyzed,and then some suggestions for the curtain groutings to be made in the dyas to come are proposed as well. The analysis method adopted herein can provide a reference for the similar project concerned.