水布垭水电站高面板坝趾板灌浆试验研究

Test and study on the plinth grouting of the high face rockfill dam of Shuibuya Hydropower Station

针对水布垭水电站坝址层状岩体倾角平缓且岩溶构造发育、趾板上灌浆盖重小、水库运行水头高、后期没有维修补灌条件进行了趾板灌浆试验 ,在试验中对灌浆压力、浆液配比、注入率等参数全部采用三参数自动记录仪进行记录 ,对趾板的抬动观测采用自动抬动观测记录仪和报警装置 ;为了提高浅层灌浆压力 ,增强防渗幕体的抗渗能力 ,进行了升压试验。试验中趾板抬动得到较好控制 ,固结和帷幕灌浆压力均达到设计目标值 。

In accordance with the gentle dip angle and developed karst structure of the bedded rock body in the dam site of Shuibuya Hydropower Station, the light grouting cover weight on the plinth, high operation head of the reservoir, and without later repair or re grouting conditions, the grouting tests were made in the plinth The parameters of grouting pressure, slurry's mix proportion and injection rate were all recorded by the automatic parameter recorder in the test The lift observation on the plinth adopts the automatic lift observation recording device and warning facilities In order to increase the shallow grouting pressure and the anti seepage capacity of impervious curtain, the boost pressure test was made In the test, the lift of plinth was controlled well and the consolidation and curtain grouting pressures all reached the design values so that good test results were gained